What are the 3 types of loops in java?

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Can java arraylist hold different types?

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program to validate the IP address? Validity range should be 0 to 255

1 Answers   Huawei,

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what are the uses of Class class and what it returns? explain it with the example code.

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How do you use final keywords and final variables in Java?

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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.

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What is general methodology?

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In the first round, there are 30 aptitude and 30 java questions. We are suppose to finish both the papers within 60 minutes. I cleared this round. Next was test for programming skills. In this section, Some 7 n's were asked. 1. What is the difference b/w sleep(1000) and wait(1000) 2. what is the diff b/w static block and static function? 3. Write a program to validate IP address using string tokenizer. 4. Write a program to create singleton class 5. write a function to reverse the string 6. Write a prog to print prime nos upto n. EX: If n=9, It shld print 1,2,3,5,7 7. One program on collections- Write a program to print no. of times a number is repeating in an array. EX- {1,3,1,2,5,7,3,7,34,3,8,3} It should print: 1- 2 times 3- 4 times and so on 7. Write a func to print fibonocci series After this I had technical interview, which went on for. 60 mins or so. There were qn's about multi threading, Exception handling and collection classes. Knowledge about collections was very important for the post I was interviewed for.

1 Answers   Huawei,

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Write a program to show whether a graph is a tree or not using adjacency matrix.

0 Answers   Amazon,

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how to create multithreaded program? : Java thread

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Can we define a package statement after the import statement in java?

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how can u create the object with out new operator

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