Difference between method overloading and overriding.

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I want to persist data of objects for later use. What’s the best approach to do so?

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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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How does a for loop work?

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Describe string intern() methodology

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What are the three parts of a lambda expression?

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What is the default size of set in java?

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What is re-factoring in software?

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What does it mean to be immutable?

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What is hard code & soft code?

7 Answers   Cognizant, Wipro,

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What restrictions are placed on method overriding?

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Can we override constructors?

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