Tag: java

Questions Related to java

The default statement of a switch is always executed.
java

  1. True

  2. False

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Correct Option: B
Explanation:

To evaluate this statement, we need to understand the behavior of the default statement in a switch statement.

The default statement in a switch statement is optional and serves as a catch-all case. It is executed if none of the other cases match the value being switched.

Now let's go through each option:

A. True: This option is incorrect. The default statement is only executed if none of the other cases match the value being switched. If any of the other cases match, the default statement is skipped.

B. False: This option is correct. The default statement is not always executed. It is only executed if none of the other cases match the value being switched.

Therefore, the correct answer is B. False.

Let me know if you have any further questions!

How can you prevent a member variable from becoming serialized?
java

  1. By marking it private

  2. By marking it volatile

  3. By marking it transient

  4. You can not.

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Correct Option: C

Types of Storage Class Variables
java

  1. Automatic

  2. Global

  3. Static

  4. External

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Correct Option: A,C,D

__________ pointer is a type of pointer of any data type and generally takes a value as zero
java

  1. Vptr

  2. Void

  3. Null

  4. Zero

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Correct Option: C

Which of the following statements are true?a. By default,all members of structure are private.b.new and delete operator can be overlaodedc.friend fucntion can overload [],(),= operators.
java

  1. a only

  2. a and b

  3. b only

  4. none of the above

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Correct Option: C

During Compilation, The function call is replaced by function code for which function?
java

  1. Virtual functions

  2. Inline functions

  3. Static functions

  4. Friend functions

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Correct Option: B

The idea of hiding data that are not needed for presentation is
java

  1. Encapuslation

  2. Abstraction

  3. Information Hiding

  4. Polymorphism

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Correct Option: B

Which of them is a not command line Tool?

java core java

  1. 1.java

  2. 2.javaw

  3. 3.javapath

  4. 4.javadoc

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Correct Option: C

AI Explanation

To answer this question, you need to understand the concept of command line tools. Command line tools are programs or applications that can be executed from the command line interface of an operating system.

Let's go through each option to understand why it is correct or incorrect:

Option A) 1.java - This option is incorrect because "java" is a command line tool for running Java programs.

Option B) 2.javaw - This option is incorrect because "javaw" is also a command line tool for running Java programs, specifically Java programs that don't display a console window.

Option C) 3.javapath - This option is correct because "javapath" is not a recognized command line tool. It does not exist as a standard command for executing tasks in the command line interface.

Option D) 4.javadoc - This option is incorrect because "javadoc" is a command line tool that generates Java API documentation.

The correct answer is C) 3.javapath. This option is correct because "javapath" is not a recognized command line tool.

A/An___instance variable is shared by all instances of the class.It exist even before the object is created
java core java

  1. 1.instance

  2. 2.abstract

  3. 3.interface

  4. 4.static

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Correct Option: A

Which of the following is not a method of java.util.ArrayList?
java core java

  1. 1.add(Object x)

  2. 2.remove(Object x)

  3. 3.contains(Object x)

  4. 4.insert(int i,Object x)

  5. 5.set(int I,Object x)

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Correct Option: D