Difference between abstract and concrete class ?
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how to handle exceptions in ejb?
How to read and write image from a file ?
What does this() represent, and how is it used in Java?
What is constructor chaining in java?
Explain about oops concepts.
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What is the use of static keyword in "public static void main()"
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What is string manipulation?
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).
Is string is a data type?
Is it necessary for the port addresses to be unique? Explain with reason.
What are voids?
There are 2 methods in a class. Both have the same method signature except for return types. Is this overloading or overriding or what is it?