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

Core Java Interview Questions

Questions Answers Views Company eMail

How many JVMs can run on a single machine and what is the Just-In-Time(JIT) compiler?

Global Logic,

1010

Does java support multiple inheritance or not?

Hexaware,

1037

How can you read content from file in java?

HCL,

971

What is run time allocation?

Fidelity,

984

How can we avoid including a header more than once?

Fidelity,

997

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

GrapeCity,

992

Where to store local variables?

Aspiring Minds,

1049

How do you declare an array that will hold more than 64KB of data?

Aspire, Infogain,

1217

What is the difference between member variables initialization and assignment in a constructor?

Hexaware, Virtusa,

1193

How can I right-justify a string?

Aspire, Infogain,

1117

How would overload a function based on return type?

Genpact,

929

Which method you will use to create a new file to store some log data. Each time a new log entry is necessary, write string to the file in java ?

HCL,

1125

Write a program to find the whether a number is an Armstrong number or not?

Aspire, Infogain,

974

Is it possible to use Semaphore/ Mutex in an Interrupt Handler?

Ciena,

1044

Explain Basics of OOP Language in java

Atos Origin,

1002

Post New Core Java Questions

Un-Answered Questions { Core Java }

Is java 9 released?

956

What is __ init __ functions?

1055

In a class implementing an interface, can we change the value of any variable defined in the interface?

1039

What is a java list?

1058

Is .net better than java?

975

How do you sort a list in java?

984

Does java have extension methods?

928

What do you mean Abstraction in java?

1052

What is a parameter used for?

930

What is the purpose of finalization in java programming?

1000

What are thread local variables?

1076

What are the parts of a method?

943

Explain inheritance in java?

939

Why should I use abstract class?

1037

Is an integer an object?

912

For More Un-Answered { Core Java } Questions Click Here