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

i want test pattern of zylog company and some examples also

2855

Hi how to create a mobile book on j2me program, for example dictionary, bible, magazine…. then read on the mobile phone, tell me the code and steps or other help site. Thanks

2 9517

How to create a mobile phone language or font like Arabic, Chines, Hindu or other(non English )

1 4798

1) There are 10 different threads in runnable state. Each having priority 1 to 10. How does the CPU schedules or executes these threads?

RBS,

2 7255

2) Suppose there are 5 directories having lot of files (say txt files) in each directory. 2 things :- 2.1) You want to search for filenames which have a particular pattern. 2.2) Out of these filtered files you want to search for a particular keyword or a search string. How can you achieve this?

RBS, TCS,

1 2350

3) Suppose you are a very rich person, having 50 rooms and you have lost the key for one of the room's. How effectively you can find this key? (Qs2 and Qs3 are related)

RBS,

3 9082

Suppose there is a System A which gives some output. This output is used as input by system B. The rate at which System A produces is faster than the rate at which system B consumes it. How can you improve this?

RBS,

1 5861

Suppose there is an Online shopping cart application having different objects like Cart, SelectionItem, Billing, COnfiguration, Authentication, Authorization, PersonalDetails etc. Out of this which one can be made a singleton pattern and why?

RBS,

2 10919

What is Co-Variant return type in method overriding?

RBS,

1 5900

7) Suppose there is Student class like class student { int age; string name; } We want to store these objects in a HashMap. Do we need to override any methods in Student class? If any which ones and why? what if i just override equals or just hashcode? what will be the results in both the cases?

CSC, Nagarro, RBS,

4 9643

Can an abstract class have a constructor?

RBS, Wipro,

1 9726

What is the life cycle of Servlet?

3 6669

JVM responsibility?

TCS,

6 16454

explain Anonynous inner class?

TCS,

6 9845

how can we call parametrized constrctor using reflection like Class.newInstance()...call default constrctor ..but how can we call paramitrize constroctor in reflection

2475

Un-Answered Questions { Java Related }

What is java string pool?

1076

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

1025

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

2657

What if I write static public void instead of public static void?

928

explain different ways of using thread? : Java thread

1079

Can we return resultset in java?

985

How to create a base64 decoder in java8?

1131

Is minecraft 1.15 out?

1037

What is the resourcebundle class?

1003

what are the different modes of archival? Explain each mode in two lines each?

994

What is a classloader in java?

1082

How to sort array in descending order in java?

986

i want test pattern of zylog company and some examples also

2855

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132

What is the difference between equals() and == in java?

1032

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