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1. Which class can access all public and protected methods and fields of its super class? :

Inner class

outer class

sub-class

Super class

2. Method,Field can be accessed from the same class to which they belong. :

Public

Protected

Default

Private

3. Which tool is required on each machine to run a Java program? :

JDK

JVM

SDK

JRE

4. Which method of the Runnable interface that must be implemented by all threads? :

Run()

Start()

Sleep()

Wait()

5. What of the following is the default value of an instance variable? :

null

Depends upon the type of variable

Not assigned

6. What is the size of float variable? :

8 bit

16 bit

64 bit

32 bit

7. Which Set class should be most popular in a multi-threading environment, considering performance constraint? :

HashSet

LinkedHashSet

ConcurrentSkipListSet

CopyOnWriteArraySet

8. Which of those class ought to be most popular to be used as a key in a very HashMap? :

String

Double

Integer

All of the above

9. Which company was behind the creation of Java? :

Apple

Microsoft

Sun Microsystems

Borland

10. What was the original name for Java? :

C++

Lisp

Oak

J2EE

11. What is the name of the inventor (or father) of Java? :

James Gosling

Bjarne Stroustroup

Bill Gates

Dennis Ritchie

12. The Java API intended for business and server 3-tier applications is called? :

Java 2, Standard Edition

Java 2 Servlets

Java 2, Enterprise Edition

avaMail

13. What does AWT stand for? :

Abstract Widget Transfer

Apple-Windows Technology

Abstract Window Toolkit

All Windows Titles

14. Which of the following is a Java keyword? :

repeat

final

elsif

select

15. Which of the following keywords are in C++ but not in Java? :

virtual

float

goto

class

16. What is the name of the class that all Java classes inherit (directly or indirectly) from? :

Class

Object

ClassLoader

none of the above

17. What is true about constructor? :

It can contain return type

It can take any number of parameters

It can have any non access modifiers

constructor cannot throw an exception

18. Which of these method of Object class can clone an object? :

Objectcopy()

copy()

Object clone()

clone()

19. Which of these keywords can be used to prevent inheritance of a class? :

super

constant

class

final

20. Which of these keywords cannot be used for a class which has been declared final? :

abstract

extends

abstract and extends

none of the mentioned

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