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

Core Java Interview Questions

Questions Answers Views Company eMail

What are use cases?

1021

Can a constructor have different name than a class name in java?

1287

What is the purpose of void class?

1113

What is the difference between an interface and an abstract class?

Cyient,

1059

How to add menushortcut to menu item?

1049

Can you call one constructor from another if a class has multiple constructors?

1105

What is a singleton class? Give a practical example of its usage.

1154

Can constructor be inherited?

1092

Can a class declared as private be accessed outside it’s package?

1066

What is the relationship between clipping and repainting under awt?

1201

What is are packages?

1091

I want to re-reach and use an object once it has been garbage collected. Define how it’s possible?

1076

What is externalizable interface?

1149

What is the difference between reader/writer and inputstream/output stream?

1140

Define how can we find the actual size of an object on the heap?

1293

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Un-Answered Questions { Core Java }

What does %4d mean in java?

1544

What are methods of a class?

1087

What are extraneous variables examples?

1178

What is the difference between actual and formal parameters?

1007

What does opcode mean?

1178

What is meant by distributed application? Why are we using that in our application?

998

What is the use of put method?

1006

If goto and const is reserve words than why it is not work in java?

2029

How do you create a sop?

1050

Can a class be defined inside an interface?

1084

What do negative exponents mean?

1113

What is a method in programming?

1232

How many ways can we create singleton class?

1030

Describe different states of a thread.

1051

how does multithreading take place on a computer with a single cpu? : Java thread

1201

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