Object Oriented Programming

Which of the following option leads to the portability and security of Java?

• Bytecode is executed by JVM

• The applet makes the Java code secure and portable

• Use of exception handling

• Dynamic binding between objects

• 15 times ***

• 15 times +++++

• 8 times *** and 7 times +++++

• Both will print only once

Where an object of a class get stored?

• Heap

• Stack

• Disk

• File

• Heap, Heap

• Stack, stack

• Heap, Stack

• Stack, Heap

Java uses two stage system for program execution. They are

• Compiler and instruction

• Compiler and interpreter

• Copy and compiler

• None

Garbage collection in Java is

• Unused package in a program automatically gets deleted.

• Memory occupied by objects with no reference is automatically reclaimed for deletion.

• Java deletes all unused java files on the system.

• The JVM cleans output of Java program.

Java compiled source code programs have extension

• .java

• . source

• .class

• . compile

Which of the following is smallest integer data type ?

• long

• int

• byte

• short

Byte variables are declared by use of the ____________ keyword (Using Primitive Data Type).

• byte

• Byte

• Bytes

• bytes

Default value of character data type in Java Programming is ___________________.

• null

• undefine

• 0

• "\u0000'