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,

1058

Does java support multiple inheritance or not?

Hexaware,

1100

How can you read content from file in java?

HCL,

1004

What is run time allocation?

Fidelity,

1024

How can we avoid including a header more than once?

Fidelity,

1040

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

GrapeCity,

1027

Where to store local variables?

Aspiring Minds,

1106

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

Aspire, Infogain,

1293

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

Hexaware, Virtusa,

1272

How can I right-justify a string?

Aspire, Infogain,

1179

How would overload a function based on return type?

Genpact,

969

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,

1161

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

Aspire, Infogain,

1032

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

Ciena,

1092

Explain Basics of OOP Language in java

Atos Origin,

1060

Post New Core Java Questions

Un-Answered Questions { Core Java }

What are mutable classes?

1058

What is a condition in programming?

1013

What language is an assembler written in?

997

What are the types of java languages?

976

Explain about arraylist?

1102

What are the difference between composition and inheritance in java?

1027

Explain the selection sort algorithm?

1058

Objects or references which of them gets garbage collected?

968

What is the purpose of the strictfp keyword?

1164

What is data type modifier?

944

How can you add and remove nodes in jtree?

1044

What is anonymous inner class?

1083

What is integer parseint?

990

What is your platform?s default character encoding and how to know this?

2372

how to create daemon thread in java?

1074

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