Java Lab

Who invented Java Programming?

• Guido van Rossum

• James Gosling

• Dennis Ritchie

• Bjarne Stroustrup

Which statement is true about Java?

• Java is a sequence-dependent programming language

• Java is a code dependent programming language

• Java is a platform-dependent programming language

• Java is a platform-independent programming language

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

• JRE

• JIT

• JDK

• JVM

Which one of the following is not a Java feature?

• Object-oriented

• Use of pointers

• Portable

• Dynamic and Extensible

Which of these cannot be used for a variable name in Java?

• identifier & keyword

• identifier

• keyword

• none of the mentioned

What is the extension of java code files?

• .js

• .txt

• .class

• .java

What will be the output of the following Java code?

• 32

• 33

• 24

• 25

Which of the following is not an OOPS concept in Java?

• Polymorphism

• Inheritance

• Compilation

• Encapsulation

What will be the output of the following Java program?

• Compilation error

• Runtime error

• 5 6 5 6

• 5 6 5

Answer explanation

Second print statement doesn’t have access to y , scope y was limited to the block defined after initialization of x.

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

• Multiple polymorphism

• Compile time polymorphism

• Multilevel polymorphism

• Execution time polymorphism

Answer explanation

There are two types of polymorphism in Java. Compile time polymorphism (overloading) and runtime polymorphism (overriding).