Practice Pakistan's most useful MCQs for competitive exams

_________ allows java code to run in the JVM to call and be called by native applications ?

• (A)  JNI
• (B)  FJI
• (C)  NJI
• (D)  JFI

Answer

Submitted By :Ali Uppal

Which statements are most accurate regarding the following classes? class A{private int i; protected int j; } class B extends A{ private int k; protected int m; } ?

• (A)  An object of B contains data fields j, k, m
• (B)  An object of B contains data fields k, m
• (C)  An object of B contains data fields j, m
• (D)  An object of B contains data fields i, j, k, m

Answer

Submitted By :Ali Uppal

The following fraction of code double STATIC = 2.5 ; System.out.println( STATIC ); ?

• (A)  Prints 2.5
• (B)  Raises an exception
• (C)  Raises an error as STATIC is used as a variable which is a keyword
• (D)  None of these

Answer

Submitted By :Ali Uppal

All raw data types should be read and uploaded to the database as an array of________________?

• (A)  int
• (B)  byte
• (C)  char
• (D)  bollean

Answer

Submitted By :Ali Uppal

String is the predefined ?

• (A)  Object
• (B)  Variable
• (C)  Class
• (D)  Method

Answer

Submitted By :Ali Uppal

Executable applet is_________________?

• (A)  .class file
• (B)  .java file
• (C)  .java html
• (D)  .applet file

Answer

Submitted By :Ali Uppal

Which among following classes is not part of Java’s collection framework ?

• (A)  Stack
• (B)  Maps
• (C)  Queue
• (D)  Array

Answer

Submitted By :Ali Uppal

Why we use array as a parameter of main method_________________?

• (A)  Can store multiple values
• (B)  It is syntax
• (C)  Both of above
• (D)  None of above

Answer

Submitted By :Ali Uppal

Methods that have same name, but different Parameter list and different definition known as_________________?

• (A)  Overriding
• (B)  Overloading
• (C)  Constructor
• (D)  none of these

Answer

Submitted By :Ali Uppal

How many keywords are available in java ?

• (A)  24
• (B)  48
• (C)  96
• (D)  192

Answer

Submitted By :Ali Uppal