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 three ways in which a thread can enter the waiting state? : Java thread

1030

explain different ways of using thread? : Java thread

1017

what do you understand by synchronization? : Java thread

1008

what are three ways in which a thread can enter the waiting state? Or what are different ways in which a thread can enter the waiting state? : Java thread

979

what is the purpose of the wait(), notify(), and notifyall() methods? : Java thread

998

what is thread? What are the high-level thread states? : Java thread

1280

what is a working thread? : Java thread

1049

what is the difference between preemptive scheduling and time slicing? : Java thread

1042

what happens when a thread cannot acquire a lock on an object? : Java thread

1054

what is synchronization and why is it important? : Java thread

1099

what is the difference between a threads start() and run() methods? : Java thread

1017

how can you take care of mutual exclusion using java threads? : Java thread

1052

why are wait(), notify() and notifyall() methods defined in the object class? : Java thread

1002

what is a green thread? : Java thread

1027

how to create multithreaded program? Explain different ways of using thread? When a thread is created and started, what is its initial state? Or extending thread class or implementing runnable interface. Which is better? : Java thread

1040

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Un-Answered Questions { Core Java }

What are the benefits of operations in java?

1054

Does java list allow null?

999

Why is a singleton bad?

961

What is keyword auto for?

1191

What is the major drawback of internal iteration over external iteration?

1031

How does the garbage collector works in java?

1096

Define max and min heap, also the search time of heap.

1032

which class is the wait() method defined in? : Java thread

956

What are the advantages of java over cpp?

1077

What will happen if non-synchronized method calls a static synchronized method and what kind of lock it acquires?

1115

Can we inherit a class with private constructor?

1131

What is the use of join method?

1035

What is meant by memory leak?

1082

What is mean by encoding?

1086

What is Garbage Collection in Java

1089

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