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 scope & storage allocation of static, local and register variables? Explain with an example.

IBS,

1014

How will you reverse a link list without using recursion?

Global Logic,

1033

What is meant by stack and queue?

GrapeCity,

1071

What is the difference between heap memory and stack memory?

Aspiring Minds,

1073

What Is Query Throttling in java?

HCL,

999

What do you mean by Function Overloading in java?

Impetus,

1179

How to remove the trailing spaces from a string?

Infogain,

1274

how many types of Inheritance?

Impetus,

1176

Difference between a process and a program?

Infosys,

1115

What is the benefit of using enum to declare a constant?

Aspire, Infogain,

1104

Define "Access specifiers" in java.

HCL,

1173

What are the different approaches to implement a function to generate a random number?

Axtria, ITC Indian Tobacco Company,

1060

What are abstract classes and anonymous classes?

Flextronics, Thomson Reuters, Virtusa,

1075

Explain the differences between static and dynamic variables?

Fidelity,

1150

How would you dynamically allocate memory to an array?

Atos Origin,

1040

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Un-Answered Questions { Core Java }

Can we sort a map in java?

1046

What is object-oriented programming?

1123

Why is an interface be able to extend more than one interface but a class can’t extend more than one class?

1169

What is the collections api?

1056

How do you invoke a method?

1004

What is a module function?

1103

What are different ways of object creation in java ?

1078

Is java owned by oracle?

1017

What is the purpose of final keyword and when to use it?

1004

Which is faster set or list in java?

1034

What is 16 bits called?

946

What does int [] mean in java?

1035

What is a qualifier in a sentence?

989

Why are the objects immutable in java?

988

Is java 11 paid version?

985

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