Tag: web technology

To solve this question, the user needs to know that the getWriter() method returns an object of type PrintWriter, which can be used to generate output. The user must also know which class defines this method.

The getWriter() method is used to return an object of type PrintWriter, which can be used to generate output. This method is defined in the HttpServletResponse class.

Therefore, the correct answer is:

The Answer is: B. HttpServletResponse

To answer this question, the user needs to have knowledge about HTTP response status codes.

Now, let's go through each option and explain whether it is correct or incorrect:

A. A status of 200 to 299 signifies that the request was successful. This statement is correct. HTTP status codes in the 200 range indicate that the client's request was successful and the server responded with the requested resource.

B. A status of 300 to 399 are informational messages. This statement is incorrect. HTTP status codes in the 300 range indicate that the server is redirecting the client's request to a different location.

C. A status of 400 to 499 indicates an error in the server. This statement is incorrect. HTTP status codes in the 400 range indicate that the client's request was incorrect or invalid, and the server could not understand it.

D. A status of 500 to 599 indicates an error in the client. This statement is incorrect. HTTP status codes in the 500 range indicate that the server encountered an error while trying to fulfill the client's request.

Therefore, the correct answer is:

The Answer is: A

To understand the type of HTTP request generated, the user needs to know the following:

• HTTP request methods
• The structure of a URL

The HTTP request method indicates the type of action the client wants the server to perform on a resource. The structure of a URL is made up of several parts, including the protocol, domain name, and path.

When a user types the URL http://www.javaprepare.com/scwd/index.html:

• The protocol is HTTP.
• The domain name is www.javaprepare.com.
• The path is /scwd/index.html.

Based on this information, the correct answer is:

The Answer is: A (GET method)

The GET method is used to request a representation of the specified resource. In this case, the user is requesting the resource located at http://www.javaprepare.com/scwd/index.html by typing the URL into their web browser. As a result, a GET method HTTP request is generated to retrieve the resource.

To solve this question, the user needs to be familiar with the structure of a war file, which is a compressed file format used to package web applications.

The compiled class files are stored in the /WEB-INF/classes directory inside the war file. Therefore, the correct answer is:

The Answer is: C. /WEB-INF/classes.

Option A (/META-INF/classes) is incorrect because the META-INF directory in the war file contains metadata files, not compiled class files.

Option B (/classes) is also incorrect because there is no such directory in a typical war file.

Option D (/root/classes) is incorrect because there is no root directory in a war file.

To answer this question, the user needs to know about the different levels of scope in Java web applications.

ServletRequest refers to the request scope, which is the smallest level of scope and lasts only for the duration of a single request.

HttpSession refers to the session scope, which lasts for the duration of a user's session with the web application.

ServletConfig refers to the servlet configuration scope, which is used to pass initialization parameters to a servlet.

ServletContext refers to the application scope, which is the largest level of scope and lasts for the duration of the web application.

Therefore, the correct answer is:

The Answer is: D. ServletContext

To answer this question, the user needs to know the difference between a compiled program and a script.

A compiled program is a set of machine-readable instructions that are generated by a compiler from high-level programming language source code. The compiled program is then executed directly by the computer's CPU.

On the other hand, a script is a set of instructions written in a programming language that is interpreted by an interpreter at runtime. The interpreter reads and executes the code line by line instead of generating machine code.

Now, let's go through each option and explain why it is right or wrong:

A. Faster: This option is generally incorrect. Compiled programs are usually faster than scripts because they are already translated into machine code. The computer can execute machine code directly, which is faster than interpreting source code line by line.

B. Slower: This option is generally correct. Scripts are usually slower than compiled programs because they need to be interpreted at runtime. The interpreter has to read and execute the code line by line, which is slower than executing machine code directly.

C. The execution speed is similar: This option is generally incorrect. In most cases, compiled programs are faster than scripts. However, there may be some cases where the execution speed is similar, such as when the compiled program is poorly optimized or the script is highly optimized.

D. All of the above: This option is incorrect. Option A and C contradict each other, so they cannot both be correct. Option B is generally correct, but there may be some rare cases where a script is faster than a poorly optimized compiled program.

Therefore, the correct answer is:

The Answer is: B. Slower