Constructors and Methods -Java Programming MCQ Questions and Answers

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Each section contains 100 MCQs on Constructors and Methods .

Which method is called when an object is garbage collected in Java?

A) finalize() B) destroy() C) dispose() D) clean()

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Answer & Solution

Answer: Option A

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In Java, can a constructor have a return type?

A) No, constructors do not have a return type B) Yes, it must have the same return type as the class C) Yes, it can have any return type D) Yes, but it must be "void"

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Answer & Solution

Answer: Option A

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What is method overriding in Java?

A) Defining a new method with the same name in a subclass B) Hiding a method in the superclass C) Redefining a method in the superclass D) Defining multiple methods in the same class

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Answer & Solution

Answer: Option A

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In Java, what is the purpose of the "super" keyword in a constructor?

A) To call the superclass constructor B) To create a new object C) To access a static method D) To indicate a private method

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Answer & Solution

Answer: Option A

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What is a "static" method in Java?

A) A method that belongs to the class rather than an instance B) A method that cannot be called from other classes C) A method that cannot be overridden D) A method that returns a static value

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Answer & Solution

Answer: Option A

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What is a parameterized constructor in Java?

A) A constructor with no parameters B) A constructor with parameters that initialize object properties C) A constructor with a return type D) A constructor with static methods

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Answer & Solution

Answer: Option B

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Which keyword is used to call the constructor of the superclass in a subclass constructor?

A) super B) this C) extends D) constructor

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Answer & Solution

Answer: Option A

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What is the purpose of method parameters in Java?

A) To pass values into a method B) To define local variables C) To specify the return type D) To create instance variables

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Answer & Solution

Answer: Option A

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In Java, which keyword is used to define an abstract method?

A) abstract B) method C) void D) public

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Answer & Solution

Answer: Option A

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What is method chaining in Java?

A) Calling multiple methods on the same object in a single line B) Running methods concurrently C) Defining methods with the same name D) Using methods to chain objects together

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Answer & Solution

Answer: Option A

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