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 4430

What is java class writing rules?

Oracle,

1 3260

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

Tech Mahindra,

2 4001

How many types of modifiers are there?

Infosys,

1 3328

What are access modifiers?

Infosys,

1 3320

What are non-access modifiers?

Cognizant,

2 3823

How does access modifiers work?

Wipro,

1 2975

How does static modifier work?

Wipro,

1 3262

How does abstract modifier work?

Wipro,

1 2929

How does synchronized modifier work?

IBM,

1 2981

How does final modifier work?

Tech Mahindra,

1 3464

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

Infosys,

1 3385

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

IBM,

1 3049

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

Cognizant,

1 3581

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

Wipro,

1 3215

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Un-Answered Questions { Core Java }

What is difference between synchronize and concurrent collection in java?

1075

What is the difference between a method and a procedure?

1065

What are the advantages of packages in java?

1611

What is a class variable?

1039

How many bits is size_t?

995

What is deserialization?

1030

What is the difference between java applets and applications?

1158

What is the effect of keeping a constructor private?

951

What is lazy initialization in java?

1012

Explain the difference between collection api and stream api in java8?

974

Describe what happens when an object is created in java ?

1009

What is the difference between iterator and enumeration ?

1005

Is it possible to compare various strings with the help of == operator?

995

What is callable java?

976

Is java still necessary?

1073

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