Core Java Interview Questions
Questions Answers Views Company eMail

What is a Hash Table? What are the advantages of using a hash table?

Ciena,

577

What is a Transient Object?

InfoAxon Technologies,

609

Why declare Main() method as a static in java ?

HCL,

570

This abstract class is correct ? abstract class A { public abstract void Disp(); public abstract void B() { } public absract virtual C() { } }

HCL,

535

What are memory tables?

Aspiring Minds,

583

Explain the selection sort algorithm?

Hexaware,

618

What are daemon Threads in java?

Impetus,

586

What is the basic concepts of OOPS?

BlackRock,

657

What is backdrop?

Atos Origin,

571

Can we store variables in local blocks?

Global Logic,

763

Write a program to search a number in the given list of numbers.

Honeywell,

614

What is a default constraint?

HCL,

596

What isan abstract class and when do you use it?

Genpact,

1 813

What do you understand by Header linked List?

Genpact,

570

Difference between current previous versions of Java?

Atos Origin,

531


Post New Core Java Questions

Un-Answered Questions { Core Java }

What is class and object in java?

528


What is output buffer?

548


Difference between doublesummarystatistics, intsummarystatistics and longsummarystatistics ?

519


what is instanceof operator used in java?

562


How do you use substring in java?

519






What is palindrome in java?

531


How many unicode characters are there?

528


What is meant by overloading?

567


Can I learn java in 3 months?

513


How does multithreading take place on a computer with a single cpu in java programming?

508


Can a constructor be private and how are this() and super() method used with constructor?

501


Java is Pass by Value or Pass by Reference?

596


What do you know about the garbage collector in java?

548


What is module in project?

496


What is difference between calling start() and run() method of thread?

536