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

Core Java Interview Questions

Questions Answers Views Company eMail

How to create an immutable class?

1180

Explain the importance of finalize() method.

1025

Why a dead thread occurs?

1028

Why synchronization is important in java?

1086

What are different types of states exist for a thread?

1061

is it possible to instantiate the math class?

1106

Explain how to force the garbage collection in java.

1029

Can you explain the usages of class.forname()?

1117

What is an immutable class? How to create an immutable class?

1122

What is a java object and java application?

1093

Explain the significance of listiterator.

1177

Define reflection.

1056

What is the best way to findout the time/memory consuming process?

1083

What is polymorphism in java? What are the kinds of polymorphism?

1127

What is final?

1140

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Un-Answered Questions { Core Java }

What is meant by JVM? Is JVM platform independent or not?

1137

What is the difference between ArrayList and Vector? which one is better in Java

1196

What type of value does sizeof return?

1076

Can we use a default constructor of a class even if an explicit constructor is defined?

1153

What is the disadvantage of java?

1019

What is meant by nested loop?

1097

What is member in java?

1122

What is the purpose of extern variable?

1064

Why declare Main() method as a static in java ?

1126

How can constructor chaining be done using this keyword?

1342

What is compareto () in java?

1028

Explain the importance of throwable class and its methods?

1099

How to sort array of 0 and 1 in java?

1007

What methods are used in Servlet?Applet communication?

2316

explain local datetime api in java8?

1062

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