Tag: java

Questions Related to java

How does Tomcat execute a JSP?
java

  1. As a CGI script

  2. As an independent process

  3. By one of Tomcat's threads

  4. None of the above is correct.

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Correct Option: C

The Maximum Length Of The Session Id(Length Identifier) Is ___________
java

  1. 4K

  2. 2K

  3. 6K

  4. None of the above is correct.

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Correct Option: A

Following method(s) cannot be overridden in the JSP page.
java

  1. _jspService()

  2. jspInit()

  3. jspDestroy()

  4. getParameter()

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Correct Option: A

The session tracking in the JSP can be done by :-

  1. URL rewriting
  2. Cookies
  3. User-Authorization
  4. Hidden Files
java

  1. 1,3,4 only

  2. 2,3,4 only

  3. 1,2,4 only

  4. 1,2,3,4

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Correct Option: C

Calling of which of the following method causes unpredictable results in the Servlet.

java

  1. doPost()

  2. doGet()

  3. System.out.println()

  4. System.exit(0);

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Correct Option: D

AI Explanation

To answer this question, we need to understand the purpose and behavior of each method in the context of a servlet.

Option A) doPost() - This method is used to handle HTTP POST requests in a servlet. It is a standard method that can be overridden to provide custom functionality. Calling this method does not cause unpredictable results.

Option B) doGet() - This method is used to handle HTTP GET requests in a servlet. It is also a standard method that can be overridden. Calling this method does not cause unpredictable results.

Option C) System.out.println() - This method is used to print output to the console. It is not specific to servlets and does not cause unpredictable results in the context of a servlet.

Option D) System.exit(0) - This method is used to terminate the Java Virtual Machine (JVM) and exit the program. Calling this method within a servlet can cause unpredictable results because it abruptly terminates the execution of the servlet container, which may impact the ongoing processing of other requests and lead to unexpected behavior.

Therefore, the correct answer is D) System.exit(0). This option is correct because calling this method within a servlet can cause unpredictable results.

Some Operating Systems have a limitation on the Max Length of the URL, which are normally _______ characters.
java

  1. 255

  2. 225

  3. 264

  4. 250

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Correct Option: A

The mails can be send from the Servlet by the usage of the following :-
java

  1. Simple Mail Transfer Protocol (SMTP) implementation in Java.

  2. Java Mail API

  3. Both a and b

  4. Neither a and b

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Correct Option: A

You read the following statement in a Java program that compiles and executes.

submarine.dive(depth);

What can you say for sure?
java

  1. depth must be an int

  2. dive must be a method.

  3. dive must be the name of an instance field.

  4. submarine must be the name of a class

  5. submarine must be a method.

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Correct Option: B

Given the following class definition, which of the following methods could be legally placed after the comment //Here public class Rid{ public void amethod(int i, String s){} //Here }
java

  1. public void amethod(int s, String i){}

  2. public void Amethod(int i, String s) {}

  3. public void amethod(int i, String mystring){}

  4. None of the above

  5. public int amethod(int i, String s){}

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Correct Option: B

Which of the following are primitive types?
java

  1. Float

  2. None of the above

  3. byte

  4. String

  5. integer

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Correct Option: C