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Core Java Interview Questions
Questions Answers Views Company eMail

My interview asked what is dynamic variable in java and where we use them.

IBM,

2 7588

"we cannot create an object of interface but we can create a variable of it".diacuss the statement with the help of an example.

2 7714

Can I create any Marker Interface? If yes then how can I use it???

4 11657

please send code example of inner classes?

2 5515

what is the use of clone method? why user cant overwrite in sub class without its proper defination.

TCS,

2 6290

what is object deep copy and shallow copy and why it is required?

2 8990

what is the use of Clonable,and serializable interface?

1 23188

Can an interface extands a class?

5 9995

Can i have abstract class with no abstract methods?

CTS,

22 47390

what are upcasting and downcasting?

5 18357

what is the diff b/w arraylist and vector?

Code Genesis, Genesis, Sprintine Labs,

6 11659

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 14317

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).

2145

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).

2725

can we access the super class method using subclass object?

4 8363


Post New Core Java Questions

Un-Answered Questions { Core Java }

Which is better 64 bit or 32 bit?

942


what is mena by object block any what is the use of that

2214


what is a working thread? : Java thread

1038


What is primitive array?

901


What are predicates in java 8?

1016


In java, how we can disallow serialization of variables?

994


What is the synonym of framework?

1001


Which of the classes will have more memory allocated?

976


What is a java list?

1117


A non-static inner class may have object instances that are associated with instances of the class’s outer class. A static inner class does not have any object instances.

1015


What is the private method modifier?

1089


Why are data types important?

1092


Implement a stack with push (), pop() and min() in O(1) time.

1112


Describe the process as to how substring() methodology mechanisms in java.

1129


how to split string in java?

1214