Core Java Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Core Java Interview Questions

Questions Answers Views Company eMail

Why ArrayList class is not a synchronized class and why it is not a thread safe class? explain

1 4678

what is actual real time using of oops concepts in projects(Interface,polymorphism.abstraction.........)

2 10703

I have 2 objects inside one object(vector). how can i serialize one of them. I dont want to serialize the second one

ABC, L&T,

3 8350

What is the difference between Synchronizing mehtod & Synchronizing block?

2 5528

what is check p object in java

TCS,

1 3869

what is the need to set path in java? how many ways to set path in java? Explain breif?

5 20010

What Is Pointer?

4 5022

how to print the below in java?thanks in advance.... * * * * * * * *

3 4793

how to print the below in java? * * * * * * * * *

2 4579

difference between String a; and String a=new String();? y do v need to assign memory to the variable?

2 5588

In how many ways we can the thread? in java

3 8926

how to make a un-checked exception as a checked exception one.

2 4940

Why only one Class is public in one file? Explain in details. Thanks in Advance.

12 15570

Hi can u pls tell me what is the use of marker interface. Iknow what is marker interface but what ability will the object get by implementing this.

CGI,

3 5532

what is the replacement method of stop() of thread

IBM, TCS,

8 11225

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Un-Answered Questions { Core Java }

What are the features of junit?

841

What does t in java mean?

755

How many ways can you break a singleton class in java?

731

What are predicates in java 8?

810

Why java does not support pointers?

801

Can we modify the throws clause of the superclass method while overriding it in the subclass?

797

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

1122

Does java support function overloading, pointers, structures, unions or linked lists?

853

State differences between C and Java?

898

Explain 5 io best practices?

819

What is a char in java?

764

What does mean in regex?

784

What is difference between path and classpath in java?

722

what is comparable and comparator interface?

783

What is general methodology?

818

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