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 a top level class be private or protected?

1072

Is it necessary that each try block must be followed by a catch block?

1038

Can we have any other return type than void for main method?

968

In a class implementing an interface, can we change the value of any variable defined in the interface?

1110

What is the difference between error and an exception?

1174

How destructors are defined in java?

1210

What is the difference between inner class and nested class?

1108

What is the difference between preemptive scheduling and time slicing?

1085

Explain the use of sublass in a java program?

1041

List primitive java types?

1056

Where import statement is used in a java program?

1145

What is mutable object and immutable object?

1141

What is difference between path and classpath?

1198

What are the supported platforms by java programming language?

1059

What is a values collection view ?

1110

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Un-Answered Questions { Core Java }

How arrays are stored in memory in java?

994

Can we use string in switch case in java?

1076

What is the effect of keeping a constructor private?

964

What are nested classes in java?

1133

What happens if an exception is throws from an object's constructor?

1151

What is the difference between a constructor and a method?

1275

What are data types in programming?

1008

What is a loop java?

1072

Why are constructors used?

1042

What is difference between protected and private?

1103

What data type is true or false?

1056

What is n in java?

966

Which method must be implemented by all threads?

1283

What is merge sort in java?

990

What is the implementation of destroy method in java. Is it native or java code?

983

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