Adding a single character to the beginning or end of a regular expression that only matches US formatted phone numbers can describe a phone number at the end of a string or a phone number at the beginning of a string. However, it cannot describe a phone number that is presented in reverse order or a phone number in which every digit is presented as a corresponding character.
Adding a character at the beginning or end of the regular expression allows for matching phone numbers that are located at the specified positions within a string. This modification ensures that the regular expression considers the entire string and recognizes the phone number pattern even if it appears at the beginning or end of the string.
However, matching a phone number in reverse order or a phone number with each digit presented as a corresponding character requires more complex modifications to the regular expression. A single character addition at the beginning or end is not sufficient to account for these specific patterns. Additional changes to the regular expression, such as using capturing groups, lookaheads, or modifying the structure of the expression itself, would be necessary to accommodate these requirements.
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to initiate the automatic saving of data, what must be done to your table at least once?
To initiate the automatic saving of data, the table must be bound to a data source at least once.
When a table is bound to a data source, it becomes a "data-bound" table. This means that any changes made to the data in the table are automatically saved to the data source without the need for additional code to be written. Once the table is bound to the data source, the programmer can manipulate the data in the table as needed, and the changes will be saved automatically.
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A user reports being able to access web sites, but not send and receive email. What troubleshooting approach would probably be quickest? A. Bottom-up B. Divide-and-conquer C. Move-the-problem D. Top-down
C. Move-the-problem troubleshooting approach would probably be the quickest.
The "Move-the-problem" troubleshooting approach would likely be the quickest in this scenario. This approach involves determining whether the issue is specific to the user's device or if it is a network-related problem. By having the user attempt accessing their email from a different device or network, such as a smartphone or a different Wi-Fi network, it helps to isolate whether the problem is with their device or the network configuration. If the issue persists on multiple devices or networks, it indicates a problem with the user's email account or the email service itself, requiring further investigation or contacting the email service provider for support. This approach allows for quickly narrowing down the possible causes of the issue and identifying the appropriate resolution steps.
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the long debate over state rights culminated in the civil war. kobe bryant and tiger woods's personal crises once threatened to overshadow their athletic careers. the sidewalk smokers disregarded the surgeon general's warnings.
These three statements describe historical events or situations. The first statement suggests that the prolonged debate over state rights eventually led to the American Civil War.
The second statement highlights how personal crises faced by athletes Kobe Bryant and Tiger Woods posed a threat to their respective athletic careers. The third statement points out that some sidewalk smokers disregard the warnings issued by the Surgeon General regarding the health risks of smoking. The explanations provide context for each statement, indicating their historical significance or impact. The Civil War was a pivotal moment in American history, shaping the nation's trajectory. The personal crises faced by prominent athletes can impact their public image, media coverage, and performance. Lastly, the disregard of warnings by sidewalk smokers indicates a disregard for public health and the recommendations made by medical professionals. Overall, these statements touch upon different aspects of history, sports, and public health, showcasing notable events or behaviors within those realms.
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which three addresses could be used as the destination address for ospfv3 messages?
Three possible destination addresses for OSPFv3 messages include AllSPFRouters, AllDRouters, and a specific OSPFv3 router's link-local address.
Here are three possible destination addresses for OSPFv3 messages:
All OSPFv3 Routers Multicast Address: FF02::5 OSPFv3 messages sent to this address are received by all OSPFv3 routers on the link.
All OSPFv3 Designated Routers Multicast Address: FF02::6 OSPFv3 messages sent to this address are received by all designated routers (DR) and backup designated routers (BDR) on the link.
All OSPFv3 SPF (Shortest Path First) Calculators Multicast Address: FF02::6 OSPFv3 messages sent to this address are received by all routers that participate in the SPF calculation process.
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The two key services of Hadoop are HDFS and in-memory computing.
(true/false)
True. The two key services of Hadoop are HDFS (Hadoop Distributed File System) and in-memory computing.
HDFS is a distributed file system that allows for the storage of large amounts of data across multiple nodes in a Hadoop cluster. In-memory computing, also known as Apache Spark, allows for faster data processing by keeping frequently accessed data in memory rather than reading and writing to disk. These two services work together to provide a scalable and efficient platform for processing and analyzing big data.
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the other functionality which the crawler provides is the static method validpagelink which indicates whether or not a given page should be crawled or skipped. T/F
The statement suggests that a crawler provides a static method called validpagelink, which determines whether a given page should be crawled or skipped.
In general, crawlers or web spiders have the ability to make decisions about which pages to crawl or skip based on certain criteria. These criteria can include factors such as relevance, importance, and accessibility of the page. The validpagelink method mentioned in the statement likely serves as a means for evaluating these criteria and making the decision.
However, the validity of the statement cannot be definitively determined without further context or information about the specific crawler in question. The existence of a static method named validpagelink is plausible, and it aligns with common practices in crawler development. However, the implementation and functionality of this method would vary depending on the specific crawler's design and requirements.
Therefore, without more specific information, it is neither possible to confirm nor deny the statement's truthfulness. It is plausible that a crawler could provide such a static method, but it ultimately depends on the implementation and purpose of the crawler in question.
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Amazon produces different types of advanced toys. These toys have different features such as: talking, dancing, obey voice command, moving around, flying, and live streaming. However, some of the toys do not support all the above features. Amazon wants a unified OS for their toys and asked Nick to design a program. Nick’s design of the toy interface and two sample subclasses are shown below. Study this design and answer the following two questions.
Which SOLID design principle does this design violate ?
b. Redesign the interface and the subclasses to eliminate the SOLID principle violation ?
The SOLID design principles are a set of guidelines that help developers create software that is easy to maintain, understand, and extend. Each letter in SOLID represents a specific principle:
Single Responsibility Principle (SRP): A class should have only one reason to change, meaning it should have a single responsibility. Open/Closed Principle (OCP): Software entities (classes, modules, functions) should be open for extension but closed for modification. Liskov Substitution Principle (LSP): Subtypes must be substitutable for their base types without altering the correctness of the program. Interface Segregation Principle (ISP): Clients should not be forced to depend on interfaces they do not use. It's better to have smaller, focused interfaces.
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a(n) _______________ includes one or more statements that can potentially raise an exception.
A code block includes one or more statements that can potentially raise an exception. When writing code, it's important to consider all potential scenarios where an exception could occur and handle them appropriately.
This means using try-catch blocks or other error handling mechanisms to gracefully handle errors and prevent the program from crashing. It's also important to include sufficient error messages or logging to aid in troubleshooting and debugging. It's crucial to remember that even seemingly minor errors can have significant impacts on the overall functionality and performance of the program, so it's important to take the time to thoroughly test and debug code before deploying it.
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behavioral targeting occurs at two levels: individual web sites and through isps.a. Trueb. false
False.
Behavioral targeting primarily occurs at the individual website level rather than through ISPs (Internet Service Providers). Behavioral targeting involves tracking and analyzing user behavior, such as browsing history, clicks, and interactions on a particular website, to deliver targeted advertisements and personalized content. This is typically done using cookies and other tracking mechanisms implemented by the website itself.
On the other hand, ISPs primarily handle the network infrastructure and routing of internet traffic. They are not typically involved in the granular tracking and analysis of individual user behavior on websites. ISPs may collect some aggregate data for network management purposes, but they are not directly responsible for behavioral targeting.
It's important to note that ISPs can have access to certain user data, such as IP addresses and network usage, but their primary role is to provide internet connectivity rather than targeted advertising based on individual user behavior.
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assume that you want to click on a link to obtain a web page. the ip address for thislink is not cached in your local host, so a dns lookup is necessary to obtain the ip address
Assuming you want to click on a link to obtain a web page and the IP address for this link is not cached in your local host, a DNS lookup is necessary to obtain the IP address.
When you click on a link or enter a domain name in a web browser, your computer needs to know the corresponding IP address of that domain to establish a connection. If the IP address is not already cached in your local host's DNS cache, your computer will perform a DNS lookup. During a DNS lookup, your computer sends a query to a DNS resolver or DNS server to obtain the IP address associated with the domain name. The DNS resolver then searches for the IP address in its database or queries other DNS servers until it finds the correct IP address. Once the IP address is obtained, your computer can establish a connection to the web server hosting the desired web page. The DNS lookup process is crucial for translating human-readable domain names into IP addresses, allowing your computer to communicate with web servers on the internet.
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what two common tools help create both user and computer objects?
Two common tools that help create both user and computer objects are Active Directory and system administration software.
Active Directory is a directory service provided by Microsoft Windows operating systems. It allows administrators to manage and organize user accounts, computer accounts, and other resources within a networked environment. With Active Directory, administrators can create and manage user objects, which represent individual users, as well as computer objects, which represent networked devices such as workstations and servers. Active Directory provides a centralized and hierarchical structure for organizing and managing these objects, making it easier to control access, permissions, and other settings.
System administration software, such as Microsoft System Center Configuration Manager (SCCM) or Red Hat Satellite, is another common tool used to create and manage user and computer objects. These software solutions provide comprehensive management capabilities for IT administrators, allowing them to create and configure user accounts, set up computer systems, assign permissions, and perform other administrative tasks. System administration software often integrates with directory services like Active Directory to facilitate the creation and synchronization of user and computer objects across the network. These tools provide a user-friendly interface and automation capabilities, making it easier for administrators to manage and maintain user and computer objects efficiently.
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the maximal length of a cycle of output bits from an lfsr of degree 7 is
The maximal length of a cycle of output bits from an LFSR (Linear Feedback Shift Register) of degree 7 is 127.
An LFSR is a shift register that generates a sequence of pseudo-random bits based on its initial state and a feedback function. The length of the cycle refers to the number of bits before the sequence of output bits repeats.
For an LFSR of degree 7, the maximal length of the cycle can be calculated as 2^7 - 1, which is 127. This means that the LFSR will produce a sequence of 127 non-repeating output bits before the pattern repeats. The length of the cycle is determined by the number of bits in the LFSR's shift register and the feedback function used to generate the next bit in the sequence. Therefore, the maximal length of a cycle of output bits from an LFSR of degree 7 is 127.
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The complete question is: "Fill in the blank: The maximal length of a cycle of output bits from a LFSR of degree 7 is ______."
write the sql code to delete the row for william smithfield, who was hired on june 22, 2004, and whose job code is 500.
To delete the row for William Smithfield, who was hired on June 22, 2004, and has a job code of 500, you can use the following SQL code:
sql
DELETE FROM your_table_name
WHERE employee_name = 'William Smithfield'
AND hire_date = '2004-06-22'
AND job_code = 500;
In this code, replace your_table_name with the actual name of your table where the data is stored. Adjust the column names accordingly based on your table schema.
The DELETE FROM statement is used to remove rows from a table. The WHERE clause specifies the conditions that must be met for a row to be deleted. In this case, it checks for the employee name, hire date, and job code to match the values provided. Only the row that satisfies all the conditions will be deleted from the table.
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to display a field list in design view, click the ____ button on the form design tools design tab.
To display a field list in design view, click the "Add Existing Fields" button on the Form Design Tools Design tab. This button is typically located on the far-left side of the ribbon, under the "Tools" group.
Once you click this button, a list of available fields will appear, allowing you to choose which fields you want to add to your form. This can be particularly useful if you are designing a form that will be used to enter data into a database, as it allows you to easily add fields that correspond to the various data points you want to collect.
Additionally, you can use this feature to modify existing forms, allowing you to add or remove fields as needed to better meet your needs. Overall, the "Add Existing Fields" button is a valuable tool for anyone working with forms in design view.
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. If you want to make a computer a domain controller, which of the following should you install? a Client for Microsoft Networks b File and Printer Sharing for Microsoft Networks Active Directory d. Domain Name System
Answer:
Active Directory
Explanation:
detailed models like those created with a sculpting program generally contain many millions of polygons.
The statement implies that sculpting programs create models with a large number of polygons.
In 3D modeling, polygons are the basic building blocks of shapes, and more polygons are required to create detailed models. Sculpting programs are specialized software designed to create digital sculptures with high levels of detail, often used in the creation of characters and creatures for movies and video games. These programs allow artists to add or subtract polygons from a model to sculpt it into the desired shape. As a result, the final models created with sculpting programs often contain many millions of polygons to achieve a high level of detail and realism.
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When solving a problem recursively, the base case
O is the initial problem to be solved.
O is the value returned from the recursion.
O is where the problem is solved directly.
O is where the problem is solved in terms of easier subproblems.
When solving a problem recursively, the base case is where the problem is solved directly.
The base case in a recursive algorithm is the condition that allows the recursion to terminate. It is the simplest form of the problem that can be solved directly without further recursion. When the base case is reached, the algorithm stops recursing and returns a specific value or performs a specific action. In recursive problem-solving, the base case is crucial to prevent infinite recursion and ensure that the algorithm eventually completes. It defines the stopping condition and serves as the starting point for backtracking or unwinding the recursive calls. The recursive steps leading up to the base case involve breaking down the original problem into smaller subproblems. These subproblems are typically solved recursively and are expressed in terms of easier or simpler instances of the same problem. However, it is the base case that provides the solution for the original problem itself.
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which type of backup is the simplest to do, but takes the most storage space?
Over time, the amount of storage space required for full backups can grow significantly. Despite this, full backups are an essential component of a robust backup strategy, as they ensure that all data is protected in the event of data loss or corruption.
The simplest type of backup that takes the most storage space is a full backup. A full backup is a complete copy of all data and files on a system, including the operating system, software, settings, and user data. While it is the easiest to perform, as it only requires copying all the data to a backup location, it can take up a lot of storage space. This is because every time a full backup is performed, it creates a complete copy of all data, even if only a small amount of data has changed since the last backup. Therefore, over time, the amount of storage space required for full backups can grow significantly. Despite this, full backups are an essential component of a robust backup strategy, as they ensure that all data is protected in the event of data loss or corruption.
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which of the following is not a type of data validation criteria you can assign to a cell?
One of the following options is not a type of data validation criteria that can be assigned to a cell. Data validation is a feature in spreadsheet applications that allows you to set rules and restrictions for the data entered in a cell.
These rules help ensure the accuracy and integrity of the data. Several types of data validation criteria can be assigned to a cell, such as: Numeric criteria: This includes conditions like greater than, less than, equal to, between, etc., for numeric values.
Text length criteria: This allows you to specify the minimum and maximum number of characters allowed in a text entry.
List criteria: With this, you can create a dropdown list of predefined values for the user to select from.
Date and time criteria: You can set rules for specific date formats or time ranges.
The option that is not a type of data validation criteria cannot be determined without the provided options. Please provide the available options for a specific answer.
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assuming that updates to c incur a cache miss due to false sharing when consecutive elements are in a row (i.e., index i) are updated
Assuming updates to variable C incur a cache miss due to false sharing when consecutive elements in a row (i.e., index i) are updated, it implies that multiple threads or processes are accessing .
updating different elements of array C concurrently.
False sharing occurs when different threads or processes access memory locations that happen to reside in the same cache line. In this case, if consecutive elements of array C are updated by different threads, they might end up sharing the same cache line, leading to cache invalidations and cache misses.
To mitigate false sharing in this scenario, you can consider the following approaches:
Padding: Add padding or extra space between consecutive elements of array C. This ensures that each element resides in a separate cache line, avoiding false sharing.
Array Partitioning: Partition array C into multiple smaller arrays, where each thread or process works on a separate partition. This reduces the chances of false sharing by isolating the updates to different parts of the array.
Thread Affinity: Assign each thread to a specific CPU core or processor to minimize cache coherence traffic between cores and reduce false sharing effects.
Data Locality: Arrange the data accessed by each thread or process in a way that promotes data locality.
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A student is developing a program that allows users to look up the definitions of words that appear in a book.
The student plans to perform a large number of searches through a dictionary containing words and their definitions. The student will use a procedure written by a computer scientist to quickly search the dictionary (and knows that the procedure will return a definition if one is available). The student cannot modify the search procedure written by the computer scientist but can call the procedure by supplying a word.
Which of the following is a true statement about the student's use of the computer scientist's search procedure?
The procedure returns true when the initial value of number is even, and it otherwise returns false
he procedure returns false no matter what the input value is.
The student is reusing the computer scientist's procedural abstraction by knowing what the procedure does without knowing how it does it.
The true statement about the student's use of the computer scientist's search procedure is that the student is reusing the computer scientist's procedural abstraction by knowing what the procedure does without knowing how it does it.
The true statement about the student's use of the computer scientist's search procedure is that the student is reusing the computer scientist's procedural abstraction by knowing what the procedure does without knowing how it does it. Procedural abstraction is the practice of hiding the details of how a procedure works by providing a simple interface that allows users to use it without understanding its internal workings. In this case, the computer scientist has written a procedure to quickly search the dictionary for a definition, and the student can call the procedure by supplying a word without needing to know how it works. This is an example of procedural abstraction, which allows for more efficient and effective programming by allowing programmers to reuse code without having to understand all the details. The other two options are not relevant to the given scenario.
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College-educated officers have ______ than non-college-educated officers.
A) less positive peer relationships
B) less flexibility
C) a higher rate of absenteeism
D) a higher likelihood of taking on leadership roles
College-educated officers have a higher likelihood of taking on leadership roles than non-college-educated officers. Studies have shown that education can enhance problem-solving and critical thinking skills, which are essential in leadership positions.
Furthermore, college-educated officers tend to be more confident and better communicators, which are crucial attributes for leading teams. However, there is no evidence to suggest that college-educated officers have less positive peer relationships or less flexibility. In fact, a higher level of education may improve an officer's ability to interact with colleagues and adapt to changing circumstances. As for absenteeism, there is limited research on the subject, but it is unlikely that college education would have a significant impact on an officer's attendance record. In conclusion, while education does not guarantee success in a law enforcement career, it can provide officers with valuable skills and qualities that may enhance their effectiveness in leadership roles.
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what is the minimum number of nodes in a full binary tree with height 4?
A full binary tree with height 4 can have anywhere from 15 to 31 nodes, but the minimum number of nodes is 15. To answer your question, we need to first understand what a full binary tree is. A full binary tree is a binary tree where every node has either zero or two children.
For a binary tree of height 4, the maximum number of nodes can be calculated as follows:
- Level 0: 1 node (root)
- Level 1: 2 nodes
- Level 2: 4 nodes
- Level 3: 8 nodes
- Level 4: 16 nodes
So, the maximum number of nodes in a full binary tree with height 4 is 31.
Now, to find the minimum number of nodes in a full binary tree with height 4, we can use the formula:
minimum number of nodes = 2^(height) - 1
Plugging in height 4, we get:
minimum number of nodes = 2^4 - 1
minimum number of nodes = 15
Therefore, the minimum number of nodes in a full binary tree with height 4 is 15.
In summary, a full binary tree with height 4 can have anywhere from 15 to 31 nodes, but the minimum number of nodes is 15.
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In this machine problem you will practice writing some functions in continuation passing style (CPS), and implement a simple lightweight multitasking API using first-class continuations (call/cc).2. Implement the map& function in CPS. Assume that the argument function is not written in CPS.> (map& add1 (range 10) identity)'(1 2 3 4 5 6 7 8 9 10)> (map& (curry * 2) (range 10) reverse)'(18 16 14 12 10 8 6 4 2 0)
The task requires implementing functions in continuation passing style (CPS) and creating a lightweight multitasking API using first-class continuations. One function to implement is map&, which applies a non-CPS function to each element of a list in CPS. Two examples of map& usage are shown: one using the add1 function on a range of numbers, and another using a curried multiplication function and reversing the range.
Continuation passing style (CPS) is a programming technique where functions take an additional argument, commonly known as a continuation, which represents the next step in the computation. The task requires implementing functions in CPS and using first-class continuations to create a lightweight multitasking API.
The first function to implement is map&, which applies a non-CPS function to each element of a list in CPS. The map& function takes two arguments: the first argument is a non-CPS function, and the second argument is a list. It applies the function to each element of the list in CPS and returns a new list containing the results.
In the first example, (map& add1 (range 10) identity), the add1 function is a non-CPS function that increments its argument by 1. The range 10 function generates a list of numbers from 1 to 10. The identity function is the continuation that simply returns the result. The map& function applies add1 to each element of the list in CPS and returns a new list with the incremented values. The result of the first example would be '(1 2 3 4 5 6 7 8 9 10), which is the list of numbers from 1 to 10, incremented by 1.
In the second example, (map& (curry * 2) (range 10) reverse), the (curry * 2) function is a curried multiplication function that multiplies its argument by 2. The range 10 function generates a list of numbers from 1 to 10. The reverse function is the continuation that reverses the order of the resulting list. The map& function applies the curried multiplication function to each element of the list in CPS and returns a new list with the multiplied values in reverse order. The result of the second example would be '(18 16 14 12 10 8 6 4 2 0), which is the list of numbers from 1 to 10, multiplied by 2 and reversed.
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which of the following are associated with the application layer of the osi model? (choose two)
Two items associated with the application layer of the OSI model are: 1.Application protocols 2. End-user applications
Application protocols, such as HTTP, FTP, SMTP, and DNS, are used to exchange data between applications. These protocols define the format and structure of the data and provide mechanisms for error detection and correction. End-user applications, such as web browsers, email clients, and file transfer programs, are the software programs that users interact with directly. These applications use application protocols to communicate with other devices and services on the network.
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Which utilities can be used to troubleshoot an improper shutdown?
Several utilities can be employed to troubleshoot an improper shutdown, such as Event Viewer, Reliability Monitor, and System File Checker (SFC).
When encountering issues with an improper shutdown, there are a few useful utilities for troubleshooting. Event Viewer is a tool available in Windows that allows users to examine system events, errors, and warnings, providing insights into what caused the shutdown problem. Reliability Monitor, another Windows utility, offers a visual representation of system stability over time, highlighting critical events like shutdowns. By analyzing this data, users can identify patterns or underlying causes contributing to the improper shutdown. Additionally, the System File Checker (SFC) is a command-line utility that scans for and repairs corrupted or missing system files, which could potentially be a factor in shutdown problems. Employing these utilities can help diagnose the root cause of the improper shutdown and guide users toward appropriate solutions or further troubleshooting steps.
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when considering the agile project management process, at the end of each iteration
When considering the agile project management process, at the end of each iteration "stakeholders and customers review progress and reevaluate priorities" (option D)
Who are the stakeholders in an agile project management process?Agile management is the application of Agile software development and Lean management ideas to different management activities, most notably product development.
Agile methodologies began to extend into other areas of activity with the publication of the Manifesto for Agile Software Development in 2001.
The project team, product owner, scrum master, and key organizational representatives are common stakeholders in an agile project management approach.
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Full Question:
When considering the agile project management process, at the end of each iteration
team members are released to work on other projects
product owner determines whether or not the project is complete
the Scrum master can terminate the project
stakeholders and customers review progress and reevaluate priorities
the Scrum master assigns daily tasks to team members
is typically a duplicate of the purchase order but without the quantity pre-listed on the form.
Packing slip. This statement is referring to a document called a packing slip.
A packing slip is a document that accompanies a shipment of goods and lists the items included in the shipment. It usually includes information such as the quantity, description, and weight of each item. Unlike a purchase order, which is used to initiate a purchase, a packing slip is generated after the goods have been picked, packed, and ready to be shipped. It serves as a useful tool for the recipient to verify the contents of the shipment and for the shipper to track inventory and ensure that all items have been included in the shipment.
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Change/complete the BSTIterator.java class so that an enhanced for loop can be used to traverse the tree in the traversal type set by the logical level using the setTraversalType method. You will also need to make appropriate changes to the iterator method in BinarySearchTree.java. Your work for Part 2 is allowed to compromise the existing getNext method in BinarySearchTree.java; i.e., you are not required to have both an effective BSTIterator class and a working getNext method.
BSTIterator:
package iterators;
import java.util.Iterator;
public class BSTIterator implements Iterator {
protected E rootData;
protected int size;
protected int counter;
public BSTIterator(E rootData, int size) {
this.rootData = rootData;
this.size = size;
counter = 0;
}
The BSTIterator class needs to be modified to enable traversal of the binary search tree using an enhanced for loop, based on the traversal type set by the logical level using the setTraversalType method.
To modify the BSTIterator class to enable traversal using an enhanced for loop, we need to implement the Iterator interface methods: hasNext and next. Additionally, we need to introduce a variable or method to store the traversal type, which can be set using the setTraversalType method. The traversal type could be in-order, pre-order, or post-order, depending on the desired logical level. The iterator method in the BinarySearchTree class should return an instance of BSTIterator initialized with the root data and size of the binary search tree. This will allow the iterator to traverse the tree using the appropriate traversal type.
By modifying the BSTIterator class and the iterator method in the BinarySearchTree class, we can achieve the functionality required to traverse the binary search tree using an enhanced for loop based on the specified traversal type. This will provide a convenient and efficient way to iterate over the elements of the tree using a familiar programming construct.
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importt numpy as np from datasets import mnist from models import Sequential from layers.core import Dense, Dropout, Activation from keras.optimizers importSGD from utils import np.utils # network and training NB_EPOCH = 1 BATCH_SIZE = 128 VERBOSE = 1 NB_CLASSES = 2 # number of outputs = number of digits OPTIMIZER = SGD() # SGD optimizer N_HIDDEN = 128 VALIDATION_SPLIT=1.2 # how much TRAIN is reserved for VALIDATION # data: shuffled and split between train and test sets (X_train, y_train), (X_test, y_test) = mnist.load_data() #X_train is 60000 rows of 28x28 values --> reshaped in 60000 x 784 RESHAPED = 784 X_train = X_train.reshape(60000, RESHAPED) X_test = X_test.reshape(10000, RESHAPED) X_train = X_train.astype('float32') X_test = X_test.astype('float32') # normalize X_train /= 255 X_test /= 255 print(X_train.shape[0], 'train samples') print(X_test.shape[0], 'test samples') # convert class vectors to binary class matrices Y_train = np_utils.to_categorical(y_train, NB_CLASSES) Y_test = np_utils.to_categorical(y_test, NB_CLASSES) model = Sequential() add(Dense(NB_CLASSES, input_shape=(RESHAPED,))) add(Activation('sigmoid')) compile(loss='categorical_crossentropy', optimizer=OPTIMIZER, metrics=['accuracy']) The above snippet of code is taken from the Keras neural network classifier for recognizing handwritten digits which was discussed in class. Identify 3 lines that are in error from the choices presented below. Group of answer choices Lines 11, 14 and 33 Lines 11, 18 and 33 Lines 14, 18 and 32 Lines 11, 32 and 33
The mistakes within the code excerpt can be identified as follows:
The Errors found after debuggingTo properly access the mnist dataset, it is important to utilize the appropriate import statement which is from keras.datasets import mnist, rather than from datasets import mnist.
A better way to phrase line 18 is to say that instead of importing np.utils from utils, one should import it as np_utils from keras.
The Sequential model does not support the use of the add method. The recommended action would be to substitute it with model.add().
The accurate response would be that errors can be found in lines 11, 18, and 32.
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