What is a boolean expression in java?

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What is the gregoriancalendar class in java programming?

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Which is best ide for java?

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What is the main advantage of passing argument by reference?

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Is JRE required to compile Java files ?

4 Answers   HCL,

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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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What is a class in java?

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Is singleton a bad practice?

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What is ph and buffers?

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What is the size of string?

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What is difference between hashset and hashmap?

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Why null interfaces are used in Java?

2 Answers  

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