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BPL placement questions - technical section of the written test of BPL

The written test of BPL mobile consists of three sections- aptitude, technical and analytical. It has been observed that sometimes the technical questions are of descriptive type.
Here are a few questions asked in the technical section of the written test of BPL:

1. Explain what is B-tree? 

2. What is meant by dense index? 

3. What is the efficiency of merge sort?

4. Explain what is meant by polymorphism?

5. What is the important feature of inheritance?

6. Explain what does the protocol FTP do?

8. Write a program on swapping (100, 50)

9. Routers are used in which layers?

10. In which layer are packets formed?

11. Explain what is meant by heap? 

12. Explain what is copy constructor? 

13. Can you tell which of the following sorting algorithm has average sorting behaviour --
a. Bubble sort
b. Merge sort, 
c. Heap sort, 
d. Exchange sort

14. In binary search tree which traversal is used for getting ascending order values—
a. Inorder, 
b. postorder,
c. preorder

15. What is the precedence order from high to low, of the symbols ( ) ++ /

16. What will be the Preorder of A*(B+C)/D-G?

17. Explain what are device drivers used for?

18. What is fork command in unix?

19. What is make command in unix?

20. What does unix .profile contains?

21. In unix, what is echo used for?

22. In the transport layer, TCP is what type of protocol

23. Explain why is a gateway used?

24. Explain how is linked list implemented?

25. What method is used in Win95 in multitasking?

26. What is meant by functional dependency?

27. Explain what is a semaphore?


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