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 4437

What is java class writing rules?

Oracle,

1 3261

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

Tech Mahindra,

2 4007

How many types of modifiers are there?

Infosys,

1 3330

What are access modifiers?

Infosys,

1 3324

What are non-access modifiers?

Cognizant,

2 3827

How does access modifiers work?

Wipro,

1 2977

How does static modifier work?

Wipro,

1 3263

How does abstract modifier work?

Wipro,

1 2929

How does synchronized modifier work?

IBM,

1 2981

How does final modifier work?

Tech Mahindra,

1 3466

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

Infosys,

1 3386

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

IBM,

1 3050

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

Cognizant,

1 3584

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

Wipro,

1 3216

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Un-Answered Questions { Core Java }

What class allows you to read objects directly from a stream?

1321

Describe 2 different ways to concatenate two strings.

1204

What is singleton class and how can we make a class singleton?

1100

What is the symbol for line break?

1099

Which java version is latest?

1035

How many bits are used to represent unicode, ascii, utf-16, and utf-8 characters in java programming?

1014

What do you understand by copy constructor in java?

932

Which of the classes will have more memory allocated?

976

What is the final keyword in java?

1436

Should a main method be compulsorily declared in all java classes?

1067

What is diamond operator in java?

957

Are strings immutable in java?

985

what state does a thread enter when it terminates its processing? : Java thread

1049

v-model life cycle

2045

What is public/private protected in java?

1042

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