how does the run() method in runnable work? : Java thread

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What is the difference between stringbuffer and stringbuilder class?

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What are uses of Hash Code?

2 Answers   Cognizant,

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Which collection does not allow duplicates in java?

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What is the difference between a window and a frame in java programming?

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what is meant by package in java?

5 Answers  

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What is a get method?

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What is run-time class and system class? what is their purpose?

1 Answers  

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What is downcasting?

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Difference between throw and throws?

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Does .length start 0 java?

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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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