Java 8 - CSE MCQs Questions and Answers

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Which of the following does not belong: If a class inherits from some other class, it should

A.

Make use of the parent class's capabilities

B.

Over-ride or add the minimum to accomplish the derived class' purpose

C.

Over-ride all the methods of its parent class

D.

Make sure the result IS-A-KIND-OF" its base class

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Using which keyword we can access a value of the instance variables and class variables of that class inside the method of that class itself.

A.

Super

B.

Final

C.

This

D.

Either super or this

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Example of functional interfaces

A.

java.util.concurrent.Callable

B.

java.lang.Runnable

C.

All

D.

None

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Which is aggregate operation in Java 8

A.

filter

B.

map

C.

forEach

D.

All

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If a variable is declared final, it must include ¦¦¦¦¦¦¦. value.

A.

integer

B.

no

C.

initial

D.

float

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What is the return type of lambda expression?

A.

String

B.

Object

C.

void

D.

Function

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Which statement is true regarding an object?

A.

An object is what classes instantiated are from

B.

An object is an instance of a class

C.

An object is a variable

D.

An object is a reference to an attribute

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A functional interface acts as target types for which of the following?

A.

Lambda expression

B.

Method reference

C.

Constructor reference

D.

All of the above

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Which of these does Stream map() operates on

A.

Class

B.

Interface

C.

Predicate

D.

Function