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,

1053

How will you reverse a link list without using recursion?

Global Logic,

1084

What is meant by stack and queue?

GrapeCity,

1129

What is the difference between heap memory and stack memory?

Aspiring Minds,

1124

What Is Query Throttling in java?

HCL,

1049

What do you mean by Function Overloading in java?

Impetus,

1227

How to remove the trailing spaces from a string?

Infogain,

1353

how many types of Inheritance?

Impetus,

1218

Difference between a process and a program?

Infosys,

1161

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

Aspire, Infogain,

1176

Define "Access specifiers" in java.

HCL,

1217

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

Axtria, ITC Indian Tobacco Company,

1107

What are abstract classes and anonymous classes?

Flextronics, Thomson Reuters, Virtusa,

1139

Explain the differences between static and dynamic variables?

Fidelity,

1204

How would you dynamically allocate memory to an array?

Atos Origin,

1079

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Un-Answered Questions { Core Java }

Why do we use regex?

1086

why Interface used?

1037

Can we declare a class as abstract without having any abstract method?

1048

How do you print array in java?

1050

Can we declare register variable as global?

967

In how many ways we can do synchronization in java?

1013

Difference between static binding and dynamic binding?

1190

Why can't you declare a class as protected?

1210

What is class level lock ?

1084

What is the purpose of the System class?

1043

Write the algorithm to check the number non-leaf nodes in a tree.

1129

Does garbage collection occur in permanent generation space in jvm?

1143

Explain parallel processing in java8?

1335

Where can i get Latest SUN Certification Dumps and what are the Sun Certification Codes that are available, Im new to JAVA, so please gimme info as i need to write J2EE - Core Java Certification

1942

Explain the difference between private, public, package and protected in java?

1100

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