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 are the differences between java and .net?..why u choose java?

1 4807

where exactly collections are usefull in realtime

2 10370

What is the use of static import ?

Rolta,

4 10059

whar are the draw backs of programming lang step by step in Clang and next in C++ and next and in Java nad in .Net

2102

Write a program that takes a 5 digit number and calculates 2 power that number and prints it.

1 4223

what is default layout of JFrame class?

6 26547

as we know a static method could access static data and static method only. then how could main method call the object of aclass which is not static and other non static data

1 3847

Difference between Encapsulation and Abstraction

Fidelity,

4 11625

What is aggregation and composition ?

Fidelity,

1 6605

Can we add default constructor to Servlet?

Fidelity,

1 6918

How do u pass data from one jsp to another jsp?

Fidelity,

3 15507

what is the meaning of java.lang and java.util

6 36765

if a java file without any source code is valid java file?

SparkTG,

3 9934

why string is not taking as primitive datatypes but we r taking it as a class? why explain it?

HP, SparkTG,

2 6405

What is the difference between the synchronized() & static synchronized()?

HP, SparkTG,

2 8689

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Un-Answered Questions { Core Java }

Is list ordered in java?

972

What is return null in java?

964

What is append function?

1002

What is primitive array?

901

How is tree Mirroring implemented?

1079

What all access modifiers are allowed for top class ?

1186

What is import java util arraylist?

1182

What does microservices mean?

952

Explain different types of wrapper classes in java?

1024

How do you generate random numbers in java?

1006

List some features of the abstract class.

1067

Is singleton class thread safe?

996

What is the purpose of java?

1012

What type of variable is gender?

990

Can we create a constructor in abstract class?

981

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