# Oracle Interview Experience | Set 32 (On-campus for Global Business Unit)

Datetime:2016-08-23 02:24:41         Topic: Oracle          Share        Original >>

1st Round : Online Test (60 min)

4 sections : Aptitude, Software Skills, Computer Science Knowledge, Coding Skills

Each sections has subsections.

1st Que :- Given a start time and end time in a digital format, you need to count the occurrence of each digit.

```Input : 23 53 09
23 53 10
Output : 0 1 2 4 0 2 0 0 0 1```

Explanation : 0 occurs two times, 1 occurs one time, 2 occurs two time, similarly count the occurrence of each digit till 9

2nd Que :- Given a directed graph. You need to find the no. of cycles in the graph.

```Input : 5
1 2
2 3
3 4
1 4
4 1
Output : 1```

3rd Round : Technical Round 1 (about 30 min)

2. What is paging. Explain.

3. Which data structure is used for paging? Explain.

4. Which is better stack or queue for paging? Explain.

5. What are the different page replacement algorithms? Explain each of them with small example.

6. Which programming language you are comfortable in?

7. What is the difference between procedural and object oriented programming?

8. Features of object oriented programming.

9. What is inheritance? What is its benefits? Give a practical use of inheritance.

10. What is encapsulation? Why to use encapsulation?

11. Given a set of numbers like a = 1, b = 4, c = 7, d = 11, and a target number T = 6. You need to find out the neighbours of target T from the given set of numbers.

Now here 4 and 7 is neighbour of T. The output should be in the format : “The neighbours are b and c”. Note that b = 4 and c = 7.

The set may be large.

You cannot use any STL containers or any STL functions like binary search, etc.

You have to write the naive code for the above.

If you wrote the code in one way, he would ask you to write in another way. Explain the code.

12. Given a string 1234ACVDSqwerr1234@&. You need to print all the digits, uppercase letters, lower case letters seperately, nothing to do with the symbols.

14. Do you think java is better than c++? Why does java do not have pointers? How does java overcome the need of having pointers?

15. If you had to make one library, how would you know which part of your code should be private, public or protected? Why would you make it private, public or

protected?

16. Do you play sports? Are you good at any sports?

1. What questions were asked in the TR1?

3. What are your favourite subjects?

4. What is data structure? What are different data structures available?

5. What is linked list? How is it different from array?

6. What is trie?

7. What is tree? How is it different from linked list?

8. What is difference between binary tree and a tree?

9. Can left subtree of a tree have no child but right subtree has child? Explain. (Explain considering ordinary tree, complete tree, full tree)

10. Amazon uses which data structure and why?

11. Do you think amazon should use tree? why or why not?

12. Do you think amazon should use linked list? why or why not?

13. How is filtering done in amazon?

14. Which sorting algorithm would amazon be using?

15. What is Merge sort?

16. What is heap sort?

17. Compare heap sort and merge sort?

18. Is quick sort better than merge sort?

19. What is meant by time complexity? Explain with respect to online shopping.

20. Questions related to projects.

21. Why should we hire you?

22. Tell us what you have done in your life?

23. Is it your first interview?

24. Family background.

25. Are you not good at any particular sports?

26. Why you chose to be an engineer?

27. What is the goal of your life?

28. Why do you want to work at Oracle?

29. Can you relocate in any part of India?

30. Do you have any questions for me?

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