JAVA Programming

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JAVA Programming

Following quiz provides Multiple Choice Questions (MCQs) related to Core Java. You will have to read all the given answers and click over the correct answer. If you are not sure about the answer then you can check the answer using Show Answer button. You can use Next Quiz button to check new set of questions in the quiz.

What of the following is the default value of a local variable?

null

Depends upon the type of variable

Not assigned

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Can we have multiple classes in the same java file?

True

False

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What is the default value of char variable?

\u0000

null

not defined

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Which of the following is false about String?

String is immutable

String can be created using new operator

String is a primary data type

None of the above

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What is class Variable?

class variables are static variables within a class but outside any method.

class variables are variables defined inside methods, constructors or blocks.

class variables are variables within a class but outside any method.

None of the above

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What kind of variables a class can consist of?

class variables, instance variables

class variables, local variables, instance variables

class variables

class variables, local variables

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What is true about a final class?

class declard final is a final class.

Final classes are created so the methods implemented by that class cannot be overridden.

It can't be inherited.

All of the above

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Does garbage collection guarantee that a program will not run out of memory?

True

False

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What is runtime polymorphism?

Runtime polymorphism is a process in which a call to an overridden method is resolved at runtime rather than at compile-time.

Runtime polymorphism is a process in which a call to an overloaded method is resolved at runtime rather than at compile-time.

Both of the above.

None of the above

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