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?

1100

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

1081

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

1001

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

1149

What is the difference between error and an exception?

1245

How destructors are defined in java?

1245

What is the difference between inner class and nested class?

1158

What is the difference between preemptive scheduling and time slicing?

1118

Explain the use of sublass in a java program?

1083

List primitive java types?

1100

Where import statement is used in a java program?

1195

What is mutable object and immutable object?

1184

What is difference between path and classpath?

1274

What are the supported platforms by java programming language?

1091

What is a values collection view ?

1155

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Un-Answered Questions { Core Java }

What is treeset and treemap in java?

1143

What are exception handling keywords in java?

1104

Define jre i.e. Java runtime environment?

1084

Why is it called buffering?

1193

Which is better singleton or static class?

1033

What are the uses of java?

1146

What is the difference between a break statement and a continue statement?

1090

How many threads can java run?

1174

What is variable in java?

1049

How dead lock situation occurs in java and how you can identify it?

1055

How can you write a loop indefinitely in java programming?

1075

How do you reverse sort in java?

1006

What is autoboxing and unboxing?

1069

What is the meaning of nullable?

1064

How many boolean functions are there?

1020

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