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

Core Java Interview Questions

Questions Answers Views Company eMail

How does JAVA ClassLoader work?

IBM,

1 4539

What is java class writing rules?

Oracle,

1 3344

What are possible key words, we can use to declare a class?

Tech Mahindra,

2 4100

How many types of modifiers are there?

Infosys,

1 3425

What are access modifiers?

Infosys,

1 3428

What are non-access modifiers?

Cognizant,

2 3936

How does access modifiers work?

Wipro,

1 3060

How does static modifier work?

Wipro,

1 3353

How does abstract modifier work?

Wipro,

1 3013

How does synchronized modifier work?

IBM,

1 3062

How does final modifier work?

Tech Mahindra,

1 3552

What are legal modifiers that we can use to declare an inner class?

Infosys,

1 3474

What is difference between “==” and equals()?

IBM,

1 3149

Why do we need to override equals() and hascode() method of object class?

Cognizant,

1 3669

How to override equals() and hashCode() method in java?

Wipro,

1 3291

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Un-Answered Questions { Core Java }

Is void a data type?

998

Is java pass by value or pass by reference?

1036

What is an array in java?

1287

Difference between association, composition and aggregation?

1043

Is java 9 released?

1067

What is the main functionality of the remote reference layer?

2055

Is map ordered in java?

998

What is substring 1 in java?

1235

What is anagram of a string?

995

What is fail fast in java?

1258

How do you read and print a string in java?

1004

What are implicit objects in java?

1026

How can you make sure that your singleton class will always return single instance in multi-threaded environment?

1087

Explain the importance of join() method in thread class?

1139

What is singletonlist in java?

1022

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