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 are upcasting and downcasting?

5 18438

what is the diff b/w arraylist and vector?

Code Genesis, Genesis, Sprintine Labs,

6 11770

what is the difference between cell phone and mobile phone?

1 4530

PreparedStatement is a pre compiled statement but where it's pre compiled ?

4 12544

What is actual difference between statement,prepared statement and callable statement and when we have to use it? pls post a answer with code and clear explanation. thanks

2 14357

Write an algorithm program in java for the following question.. 1) S is a set of integers.X is an integer obtained by sum of two digits in S. Write logic for whether or not the X is from the S. The time of algorithm should not exceed o(n logn).

2170

Write an algorithm program in java for the following question.. In a VLSI design techniques,they used rectangles to design circuits. EVery rectangle is to be placed according to x,y coordinates. Check whether or not two rectangles overlap each other. Here overlapping of rectangles is acceptable, if 1) one rectangle intersect with other. 2) one rectangle fully covers other. The time of algorithm should not exceed o(n logn).

2756

what is midlet?

7 11131

can we access the super class method using subclass object?

4 8424

what is use of marker interface? give me good example?

2 6217

what is use of threads how many ways to create thread

iTrust, Verizon,

3 10772

is it possible to create single instance of java class per session in web application

4 11381

where exactly the servlets and jsp's are stored?

CG-VAK, JHJ, TCS,

6 14891

can we create a own jdbc driver? how can we create?

HCL,

1 5555

what are the drawbacks of JDBC? explain briefly?

5 42075

Un-Answered Questions { Java Related }

Can a class be a super class and a sub-class at the same time? Give example.

1591

What is called servlet mapping?

1102

What is enhanced loop in java?

1019

How can I know when I reach the last record in a table, since JDBC doesn't provide an EOF method?

1004

What is the difference between swing and awt?

986

What are the components of swing in java?

999

What is client-certificate authentication?

1041

What is the role of helper classes in wcs?

894

What is ternary operator?

1031

What are anonymous methods and lambda expression?

856

Give the difference between the println method and sqrt method?

1106

What is meant by annotation in java?

1007

What is n in java?

968

What is spring bean scope?

437

Can you explain the directory structure for a struts folder in brief ?

991

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