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 1625

What is the default value stored in Local Variables?

5 1546

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

5 1295

Is it possible to make an array volatile?

4 1424

What is an object-oriented paradigm?

5 1508

What are the Memory Allocations available in JavaJava?

1 762

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

2 892

Can you explain the Java thread lifecycle?

1 886

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

1 1045

What is JDK? Mention the variants of JDK?

1 886

What are Brief Access Specifiers and Types of Access Specifiers?

1 862

Explain Method Overloading in Java.

1 966

Give a briefing on the life cycle of a thread.

1 881

Brief the life cycle of an applet.

1 720

What are the observer and observable classes?

1 1038

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Un-Answered Questions { Core Java }

Can we nested try statements in java?

1090

How do you use spaces in java?

981

What is polymorphism and what are the types of it?

983

What is a line separator in java?

970

Explain the hierarchy of java exception classes?

1086

Explain the difference between string, stringbuffer and stringbuilder in java?

996

What are the important features of Java 8 release?

1077

What is a stringbuffer?

960

How does class forname work in java?

958

What are the differences between heap and stack memory?

1074

how to create constants in java?

1076

What is hasnext in java?

1007

Why string is immutable with example?

959

What does string [] args mean?

1004

What is an object's lock and which object's have locks in java programming?

1037

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