JAVA MCQs - CSE MCQs Questions and Answers

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Which of these is a mechanism for naming and visibility control of a class and its content?

Object

Packages

Interfaces

None of the Mentioned.

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Which of this access specifies can be used for a class so that its members can be accessed by a different class in the same package?

Public

Protected

No Modifier

All of the mentioned

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Which of these access specifiers can be used for a class so that it's members can be accessed by a different class in the different package?

Public

Protected

Private

No Modifier

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Which of the following is correct way of importing an entire package 'pkg'?

import pkg.

Import pkg.

import pkg.*

Import pkg.*

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Which of the following is incorrect statement about packages?

Package defines a namespace in which classes are stored.

A package can contain other package within it.

Java uses file system directories to store packages.

A package can be renamed without renaming the directory in which the classes are stored.

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Which of the following package stores all the standard java classes?

lang

java

util

java.packages

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What is the output of this program?

package pkg;

class output {

public static void main(String args[])

{

StringBuffer s1 = new StringBuffer("Hello");

s1.setCharAt(1, x);

System.out.println(s1);

}

xello

xxxxx

Hxllo

Hexlo