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 4446

What is java class writing rules?

Oracle,

1 3263

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

Tech Mahindra,

2 4009

How many types of modifiers are there?

Infosys,

1 3333

What are access modifiers?

Infosys,

1 3330

What are non-access modifiers?

Cognizant,

2 3832

How does access modifiers work?

Wipro,

1 2983

How does static modifier work?

Wipro,

1 3268

How does abstract modifier work?

Wipro,

1 2931

How does synchronized modifier work?

IBM,

1 2984

How does final modifier work?

Tech Mahindra,

1 3472

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

Infosys,

1 3388

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

IBM,

1 3050

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

Cognizant,

1 3586

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

Wipro,

1 3218

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Un-Answered Questions { Core Java }

Explain the significance of class loaders in bootstrap?

949

What programs use java?

966

What is constructor and virtual function? Can we call a virtual function in a constructor?

1149

Can constructor return value?

971

How the interruptible method gets implemented?

976

Write a regular expression to validate a password. A password must start with an alphabet and followed by alphanumeric characters; its length must be in between 8 to 20.

1036

Can we define private and protected modifiers for variables in interfaces?

1088

Explain the difference between extends thread vs implements runnable in java?

1135

Difference between == and .equals() ?

1006

What is ellipsis in java?

1088

how to prepare for IT Officers Interview in Banks

1978

What is the use of list in java?

992

What is use of inner class in java?

1154

What is the size of a string in java?

1015

Variable of the boolean type is automatically initialized as?

1011

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