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Wednesday, 3 June 2015

Computer Organisation-Model question paper for B.E/B.Tech Engineering

1(a) What is the difference between positional and non-positional number system? Give example of both types of number system. (6 Marks)
(b) Why is octal or hexadecimal number systems used as shortcut notation? (4 Marks)
(c) Explain the principle of duality in Boolean algebra. How it is useful? (4 Marks)
(d) Convert the following numbers to decimal numbers:
(i) 1101102       (ii) 2A3B16       (iii) 12349                                                         (6 Marks)
2(a) State and prove two basic De Morgan’s theorem. (8 Marks)
(b) Why are NAND and NOR gates are called universal gates? (6 Marks)
(c) Define K-Map. (6 Marks)
3(a) Define half adder and full adder with diagram. (10 Marks)
(b) What is multiplexer? How the multiplexers are are useful to develop combinational circuit? (6 Marks)
(c) What is a demultiplexer? (4 Marks)
4(a) What are comparators? (4 Marks)
(b) Make a basic Seq-CKT and explain its working. (6 Marks)
(c) What are problems of SRFF and explain its remedy. (6 Marks)
(d) Explain how JKFF can be converted into DFF. (4 Marks)
5(a) Give the differences between the combinational and sequential circuit. (4 Marks)
(b) What is register and explain the working of serial and parallel register. (6 Marks)
(c) What is a cache memory? Explain. (4 Marks)
(d) Explain some characteristics of memories. (6 Marks)
6(a) What are the differences between Hard disk and CD-ROM? (4 Marks)
(b) Write the features of floppy disk, hard disk, magnetic tape, optical disk and smart card. (10 Marks)
(c) What are the differences between primary memory and secondary memory? (6 Marks)
7(a) Define processor organization. (6 Marks)
(b) Differentiate between Address buses, Control Bus and Data Bus. (6 Marks)
(c) Define Instruction set and Instruction cycle. Write a short note on types of Instructions. (8 Marks)
8(a) Write the difference between traps and external interrupt. (4 Marks)
(b) What is the need of I/O processor? Explain. (4 Marks)
(c) Define DMA and priority over CPU. (6 Marks)
(d) Describe the IBM 370 I/O channel. (6 Marks)

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