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

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Java Related Interview Questions

Questions Answers Views Company eMail

What do you understand by numeric promotion?

1 1094

Explain the encapsulation principle.

1 985

How can one prove that the array is not null but empty?

1 1017

Does jvm maintain a cache by itself? Does the jvm allocate objects in heap? Is this the os heap or the heap maintained by the jvm? Why

1 975

Can an application have multiple classes having main method?

1 1018

In system.out.println(), what is system, out and println?

1 1076

Can I have multiple main methods in the same class?

1 980

How can I swap two variables without using a third variable?

1 1052

Is jvm a compiler or an interpreter?

1 1135

What is data encapsulation?

1 1059

Why do we only use the main method to start a program?

1 1137

What is the java api?

989

What is the first argument of the string array in main method?

1025

How does java handle integer overflows and underflows?

1111

Are jvm’s platform independent?

979

Un-Answered Questions { Java Related }

Explain public static void main(string args[]) in java.

1064

Hi frnds how to lock an user when he enter wrong credentials more than 3 time using java or j2ee tech take username and password in a bean no need to connect DB and validate give me some sample application code or links its urgent for me thanks in advance

2415

Differentiate between static and non-static methods in java.

1117

What do you understand by casting in java language? What are the types of casting?

923

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

1095

What is action chaining ?

1160

What do you know about validation plugin ?

1025

How to create a base64 decoder in java8?

1131

Is minecraft 1.15 out?

1039

How to sort array in descending order in java?

987

What is an object in java and how is it created?

1128

What are the contents on web.xml in struts application ?

1059

How can you inject java collection in spring?

504

What is parsing in java?

1033

Write a java program to find the route that connects between Red and Green Cells. General Rules for traversal 1. You can traverse from one cell to another vertically, horizontally or diagonally. 2. You cannot traverse through Black cells. 3. There should be only one Red and Green cell and at least one of each should be present. Otherwise the array is invalid. 4. You cannot revisit a cell that you have already traversed. 5. The maze need not be in the same as given in the above example

2659

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