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

Core Java Interview Questions

Questions Answers Views Company eMail

Explain the meaning of java applet.

TCS,

1132

What is java Applet?

TCS,

1159

Tell me a few examples of final classes defined in Java API?

DELL,

1167

How many JVMs can run on a single machine and what is the meaning of Just-In-Time (JIT) compiler?

TCS,

1554

Given a singly linked list, determine whether it contains a loop or not without using temporary space?

Global Logic,

1036

Is Constructor possible in abstract class in java ?

HCL,

1122

Give us a program to check for parenthesis matching using stack.

Genpact,

1050

What is the Concept of Encapsulation in OOPS

HCL,

1038

How can you read an integer value from the keyword when the application is runtime in java? example?

HCL,

1201

State differences between C and Java?

Deloitte, JPMorgan Chase,

1267

Differentiate storage classes on the basis of their scope?

Fidelity,

1244

What are "class access modifiers" in Java?

Genpact,

1213

How are multiple inheritances done in Java?

Atos Origin,

1208

Can we force garbage collector to run ?

B-Ways TecnoSoft,

1109

What is the difference between overriding and overloading in OOPS.

Axtria, ITC Indian Tobacco Company,

1214

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Un-Answered Questions { Core Java }

What is synchronization and why is it important in java programming?

991

What are different types of inner classes ?

1105

Variables used in a switch statement can be used with which datatypes?

1044

What is finalize method?

1207

If an application has multiple classes in it, is it okay to have a main method in more than one class?

1066

How list contains works in java?

1051

Can we increase array size dynamically in java?

1014

What causes memory leaks in java?

985

What is the indent key?

1092

What is the java project architecture?

2298

What is the internal implementation of set in java?

999

How to sort double array in java?

1041

When would you use a static class?

1032

What is the difference between the ">>" and " >>>" operators in java?

1039

What is the difference between throw and throws keywords?

1099

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