B.E. / B.Tech. DEGREE EXAMINATION,
APRIL / MAY 2010Fourth SemesterComputer Science and Engineering
CS2253 - COMPUTER ORGANIZATION AND ARCHITECTURE
(Common to Information Technology)(Regulation 2008)
Time: Three hours
Maximum: 100 Marks
Answer ALL Questions
PART A - (10 × 2 = 20 Marks)1.Distinguish between autoincrement and autodecrement addressing mode.
2. Compare RISC with CISC architecture.
3.Under what situations the micro program counter is not incremented after anew instruction is fetched from micro program memory?
4. What are the relative merits of horizontal and vertical microinstructionformat?
5. What is pipelining and what are the advantages of pipelining?
6. List the key aspects in gaining the performance in pipelined systems.
7. How many memory chips are needed to construct 2 M × 16 memory systemusing 512 K × 8 static memory chips?
8. What is virtual memory and what are the benefits of virtual memory?
9. What is meant by bus arbitration?
10.Name and give the purpose of widely used bus standard.PART B - (5 × 16 = 80 Marks)11. (A) (i) Describe the role of system software to improve the performance ofa computer. (Marks 8)
(Ii) Design a 4-bit adder / subtracter circuit using full adders and explainits function. (Marks 8)
Or
(B) (i) What are the special registers in a typical computer? Explain theirpurposes in detail. (Marks 8)
(Ii) Design a 4-bit fast adder and explain its function in detail. (Marks 8)
12 (A) (i) Draw and explain the block diagram of a complete processor. (Marks 6)
(Ii) Briefly describe the design of a hardwired control unit. (Marks 10)
Or
(B) (i) Explain the basic organization of a microprogrammed control unitand the generation of control signals using microprogram. (Marks 12)
(Ii) What are the advantages and disadvantages of hardwired andmicroprogrammed control? (Marks 4)13.(A) (i) Describe the role of cache memory in pipelined system. (Marks 8)
(Ii) Discuss the influence of pipelining on instruction set design. (Marks 8)Or
(B) What is instruction hazard? Explain the methods for dealing with theinstruction hazards. (Marks 16)14. (A) (i) What are the different secondary storage devices? Elaborate on anyone of the devices.
(Marks 8)
(Ii) Explain how the virtual address is converted into real address in apaged virtual memory system.
(Marks 8)
Or
(B) (i) Explain approaches for addressing multiple-module memorysystems with suitable diagrams.
(Marks 6)
(Ii) Briefly describe magnetic disk principles and also the organizationand accessing of data on a disk. (Marks 10)15 (A) (i) Describe the hardware mechanism for handling multiple interruptrequests. (Marks 8)
(Ii) What are handshaking signals? Explain the handshake control ofdata transfer during input and output operation. (Marks 8)Or
(B) (i) What are the needs for input-output interface? Explain thefunctions of a typical 8-bit parallel interface in detail. (Marks 10)
(Ii) Describe the USB architecture with the help of a neat diagram. (Marks 6)
APRIL / MAY 2010Fourth SemesterComputer Science and Engineering
CS2253 - COMPUTER ORGANIZATION AND ARCHITECTURE
(Common to Information Technology)(Regulation 2008)
Time: Three hours
Maximum: 100 Marks
Answer ALL Questions
PART A - (10 × 2 = 20 Marks)1.Distinguish between autoincrement and autodecrement addressing mode.
2. Compare RISC with CISC architecture.
3.Under what situations the micro program counter is not incremented after anew instruction is fetched from micro program memory?
4. What are the relative merits of horizontal and vertical microinstructionformat?
5. What is pipelining and what are the advantages of pipelining?
6. List the key aspects in gaining the performance in pipelined systems.
7. How many memory chips are needed to construct 2 M × 16 memory systemusing 512 K × 8 static memory chips?
8. What is virtual memory and what are the benefits of virtual memory?
9. What is meant by bus arbitration?
10.Name and give the purpose of widely used bus standard.PART B - (5 × 16 = 80 Marks)11. (A) (i) Describe the role of system software to improve the performance ofa computer. (Marks 8)
(Ii) Design a 4-bit adder / subtracter circuit using full adders and explainits function. (Marks 8)
Or
(B) (i) What are the special registers in a typical computer? Explain theirpurposes in detail. (Marks 8)
(Ii) Design a 4-bit fast adder and explain its function in detail. (Marks 8)
12 (A) (i) Draw and explain the block diagram of a complete processor. (Marks 6)
(Ii) Briefly describe the design of a hardwired control unit. (Marks 10)
Or
(B) (i) Explain the basic organization of a microprogrammed control unitand the generation of control signals using microprogram. (Marks 12)
(Ii) What are the advantages and disadvantages of hardwired andmicroprogrammed control? (Marks 4)13.(A) (i) Describe the role of cache memory in pipelined system. (Marks 8)
(Ii) Discuss the influence of pipelining on instruction set design. (Marks 8)Or
(B) What is instruction hazard? Explain the methods for dealing with theinstruction hazards. (Marks 16)14. (A) (i) What are the different secondary storage devices? Elaborate on anyone of the devices.
(Marks 8)
(Ii) Explain how the virtual address is converted into real address in apaged virtual memory system.
(Marks 8)
Or
(B) (i) Explain approaches for addressing multiple-module memorysystems with suitable diagrams.
(Marks 6)
(Ii) Briefly describe magnetic disk principles and also the organizationand accessing of data on a disk. (Marks 10)15 (A) (i) Describe the hardware mechanism for handling multiple interruptrequests. (Marks 8)
(Ii) What are handshaking signals? Explain the handshake control ofdata transfer during input and output operation. (Marks 8)Or
(B) (i) What are the needs for input-output interface? Explain thefunctions of a typical 8-bit parallel interface in detail. (Marks 10)
(Ii) Describe the USB architecture with the help of a neat diagram. (Marks 6)
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