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Java interview questions and answers for freshers Page 12

(#M40029397) JAVA QUESTION java Keep an EYE

Q. What is synchronization?


A. Synchronization is the mechanism that ensures that only one thread is accessed the resources at a time.

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(#M40029396) JAVA QUESTION java Keep an EYE

Q. What are the states associated in the thread?

A. Thread contains ready, running, waiting and dead states.

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(#M40029395) JAVA QUESTION java Keep an EYE

Q. What is an abstract class?

A. An abstract class is a class designed with implementation gaps for subclasses to fill in and is deliberately incomplete

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(#M40029394) JAVA QUESTION java Keep an EYE

Q. What is are packages?

A. A package is a collection of related classes and interfaces providing access protection and namespace management

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(#M40029393) JAVA QUESTION java Keep an EYE

Q. What are the access modifiers in Java?

A. There are 3 access modifiers. Public, protected and private, and the default one if no identifier is specified is called friendly, but programmer cannot specify the friendly identifier explicitly.

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(#M40029392) JAVA QUESTION java Keep an EYE

Q. What is the base class of all classes?

A. java.lang.Object

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(#M40029391) JAVA QUESTION java Keep an EYE

Q. What is the difference between a JDK and a JVM?

A. JDK is Java Development Kit which is for development purpose and it includes execution environment also. But JVM is purely a run time environment and hence you will not be able to compile your source files using a JVM.

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(#M40029390) JAVA QUESTION java Keep an EYE

Question. What do you mean by platform independence?
Answer. Platform independence means that we can write and compile the java code in one platform (eg Windows) and can execute the class in any other supported platform eg (Linux,Solaris,etc).

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(#M40029389) JAVA QUESTION java Keep an EYE

Question. What is the most important feature of Java?
Answer. Java is a platform independent language.

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(#M40018972) JAVA QUESTION Advanced JAVA questions Keep an EYE

what is e-commerce?

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