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 is return null in java?

964

Where is java located?

1052

What is treeset in java collection?

968

What is map and hashmap in java?

1064

Is null in java?

1013

What is the arraylist in java?

1053

What is queue in java?

1149

Why do we need array in java?

1015

Why arraylist is not synchronized in java example?

1062

What is the use of arraylist in java?

1092

What is a arraylist in java?

1068

Which is better list or arraylist in java?

868

Why do we override tostring method in java?

962

What is the default size of set in java?

967

What is the maximum size of hashmap in java?

1003

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Un-Answered Questions { Core Java }

If a class is declared without any access modifiers, where may the class be accessed in java programming?

1216

How many bits is a 64 bit byte?

1083

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

1508

Describe what happens when an object is created in java ?

1009

What is java regex?

1010

What is a marker interface?

1158

What are the different types of java?

1067

What is difference between static and final?

1068

Can arraylist hold different types java?

979

Why is stringbuffer thread safe?

1044

What is package private scope in java?

948

What is Classloader in Java?

1219

When throw keyword is used?

1071

What data type is true or false?

1043

Why we use methods in java?

997

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