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,

1065

Does java support multiple inheritance or not?

Hexaware,

1120

How can you read content from file in java?

HCL,

1016

What is run time allocation?

Fidelity,

1034

How can we avoid including a header more than once?

Fidelity,

1050

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

GrapeCity,

1032

Where to store local variables?

Aspiring Minds,

1116

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

Aspire, Infogain,

1305

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

Hexaware, Virtusa,

1292

How can I right-justify a string?

Aspire, Infogain,

1188

How would overload a function based on return type?

Genpact,

981

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,

1171

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

Aspire, Infogain,

1037

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

Ciena,

1102

Explain Basics of OOP Language in java

Atos Origin,

1066

Post New Core Java Questions

Un-Answered Questions { Core Java }

What is concurrent hashmap and its features?

1104

What does string intern() method do?

1097

What is anagram of a string?

957

What is the argument in java?

939

Can we have return statement in finally clause? What will happen?

978

What is the use of StringTokenizer class?

1077

Is constructor inherited?

974

What is meant by attribute?

1136

Distinguish between a predicate and a function?

1000

What is a lock or purpose of locks in java?

1036

Program to Find the second largest element in an array.

1204

Why can't you declare a class as protected?

1145

Which class is the superclass for every class in java programming?

1009

What is a concrete classes? Is Java object class is concrete class?

990

how we can make a write-only class in java?

1044

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