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

What will happen inside init() in servlet. my interviewer asked servlet lifecycle. i said "once servlet is loaded in to memory init() will be called which performs servlet initialization " . Again interview asked what values will be initialized . what is difference between init() and init(ServletConfig config).

Infinite Computer Solutions, TCS,

2 13306

my method "abc" return array of interface "xyz" and "pqr" is abstract class implements abc and class "jkl" extends pqr My problem 1) when i call abc it retrun array xyz how can i do this hint xyz refer_xyz = new jkl(); but i can't create array. 2)I want to access method of jkl using reference of xyz??

1 3941

why interaction with server using javascript is difficult

1 3895

why business logic written using servlets not in jsp. Jsp used for presentation purpose. serlvet used for coding business logic and controller logic. Reason for using servlets in business logic.

5 13087

How to send a request to garbage collector?

3 5209

StringBuilder s = new StringBuilder("Hello Mom");s.append(",I mean,Mother"); Response.Write(s.ToString()); String s = "Hello Mom"; s+ = ",I mean Mom"; Response.Write(s); Which is faster ? which uses the most memory?

HCL,

6 9036

how to deploy the application

Oracle, RBS,

1 3386

howmany types in garbage collection

7 19139

how to monitor the servers

4 10105

Un-Answered Questions { Java Related }

What are the different orm’s supported by spring?

412

What is the use of object and class classes?

1060

What data type is true or false?

1064

How is it possible in java programming for two string objects with identical values not to be equal under the == operator?

1040

What are advice, aspect, join-point and point cut in spring?

412

How to perform quicksort in java?

1145

Mention some interfaces implemented by linked list in java.

1038

Explain about strings in java?

1091

Explain the rowcallbackhandler in spring?

427

What is difference between iterator and enumeration in java?

1010

What is the use of default method in interface in java? Explain

1025

What is the benefit of having jdbcrowset implementation?

951

What one should take care of, while serializing the object?

929

What is container-managed transaction?

1076

How to split arraylist elements in java?

1197

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