Core Java Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Core Java Interview Questions

Questions Answers Views Company eMail

Can we declare Pointer in Java?

5 1900

What is the default value stored in Local Variables?

5 1729

Difference in the use of print, println, and printf.

5 1504

Is it possible to make an array volatile?

4 1605

What is an object-oriented paradigm?

5 1740

What are the Memory Allocations available in JavaJava?

1 839

What is a singleton class in Java? And How to implement a singleton class?

2 1014

Can you explain the Java thread lifecycle?

1 984

In the below Java Program, how many objects are eligible for garbage collection?

1 1149

What is JDK? Mention the variants of JDK?

1 999

What are Brief Access Specifiers and Types of Access Specifiers?

1 921

Explain Method Overloading in Java.

1 1093

Give a briefing on the life cycle of a thread.

1 952

Brief the life cycle of an applet.

1 826

What are the observer and observable classes?

1 1135

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Un-Answered Questions { Core Java }

Why is static used?

1070

What is the difference between integer parseint and integer valueof?

1045

What are the types of java languages?

1034

Difference between collection, collection and collections in java?

1054

What does a void function return?

1057

What is general methodology?

1097

Is java a super set of javascript?

1148

Is c better than java?

1001

What is the difference between iterator and enumeration ?

1040

What is the use of private static?

1092

How do I run java on windows?

1237

What is scope & storage allocation of static, local and register variables? Explain with an example.

1047

Why Java is not pure Object Oriented language?

1155

What are the benefits of operations in java?

1126

What are filterstreams?

1113

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