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 access specifiers?

Thomson Reuters, Virtusa,

1176

Explain the concept of proper inheritance?

Thomson Reuters, Virtusa,

1068

When should a function throw an exception?

Thomson Reuters, Virtusa,

1047

When do you call copy constructor?

Tavant Technologies, Virtusa,

976

Difference between operator overloading and function overloading

Tavant Technologies, Virtusa,

1064

Explain about OOPS concepts and fundamentals.

Syntel, Visa,

1044

State the difference between strings and arrays.

Syntel, Visa,

1246

State two differences between C and Java.

Syntel, Visa,

1336

What do you mean by pointer value and address?

Syntel, Visa,

1051

What is a two-pass assembler?

Syntel, Visa,

1053

What is the difference between a loader and a compiler?

Syntel, Visa,

1036

Explain OOPs concept.

Syntel, Visa,

1083

Explain polymorphism citing an example.

Amazon,

1042

What are exceptions

Futures First,

1100

What is command line argument

TCS,

1195

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Un-Answered Questions { Core Java }

What are the two ways of implementing multi-threading in java?

1508

What is jvm? Why is java called the platform independent programming language?

1022

What environment variables do I need to set on my machine in order to be able to run java programs?

1016

How do you get the length of a string in java?

1008

What is native method in java?

1058

Give the hierarchy of inputstream and outputstream classes.

1101

When a byte datatype is used?

2204

What is core java used for?

1122

What is double checked locking in singleton?

1055

Can you write a java class that could be used both as an applet as well as an application?

962

What is java util collection?

1087

How are this() and super() used with constructors in java programming?

1063

How can you avoid serialization in child class if the base class is implementing the serializable interface?

1082

What is finalize()?

1196

Discuss different types of errors that generally occur while programming.

1039

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