Java Basics

Which of these keywords is used to define interfaces in Java?

• Intf

• intf

• interface

• Interface

Which of the following is a type of polymorphism in Java Programming?

• Multiple polymorphism

• Compile time polymorphism
  

• Multilevel polymorphism

• None of these

Which component is used to compile, debug and execute the java programs?

• JRE
  

• JIT
  

• JDK
  

• JVM

Who invented Java Programming?

• Guido van Rossum
  

• James Gosling
  

• Dennis Ritchie

• Bjarne Stroustrup

Which of the following is a superclass of every class in Java?

• ArrayList
  

• Abstract class
  

• Object class
  

• String

Which of these keywords are used for the block to be examined for exceptions?

• check
  

• throw
  

• catch
  

• try

Choose the correct size of float and double in Java.

• 32 and 64

• 64 and 32

• 32 and 32

• 64 and 64

Which of the following options is Runnable?

• 1. Interface

• 1. Class

• 1. Method

• 1. Abstract class

How many types of primitive data in Java are present?

• 6

• 7

• 8

• 9

Which keyword is used to define a constant variable in Java?

• final

• static

• const

• immutable