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PUNJAB TECHNICAL UNIVERSITY MCA - II (SEM 3) MAY 2008 : Computer System Architechture

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Roll No. ........................... Total No. of Questions : 13] [Total No. of Pages : 02 Paper ID [A0511] (Please fill this Paper ID in OMR Sheet) MCA (301) (S05) (O) (Sem. - 3rd) COMPUTER SYSTEM ARCHITECTURE Time : 03 Hours Maximum Marks : 75 Instruction to Candidates: 1) Section - A is Compulsory. 2) Attempt any Nine questions from Section - B. Section - A Q1) (15 2 = 30) a) What is the function of flip flop? List its types. b) Differentiate between adder and subtractor. c) Define the term instruction code. d) What is the task of ALU? e) What is a stack pointer? f) Differentiate between control bus, data bus and address bus. g) What is the role of control memory? h) What do you understand by channel? i) In what all situations DMA is used? j) Describe the term processing. k) Differentiate between RAM and ROM. l) What is a cache memory? m) List four devices used for storage. n) Differentiate main memory and secondary memory. o) Define seek time and rotational latency time. D - 546 P.T.O. Section - B (9 5 = 45) Q2) Explain the three basic computer instruction formats. Q3) Explain Instruction cycle in detail. Q4) What are addressing modes? Explain all types of addressing modes. Q5) Explain memory reference instructions in detail. Q6) Explain the difference between hardwired control and microprogrammed control. Q7) Explain the bus architecture in input-output interface. Q8) Explain the difference between programmed I/O and interrupt initiated I/O. Q9) Write short note on RISC. Q10) Discuss any memory management technique in detail. Q11) What is virtual memory? Discuss its role in computer systems. Q12) Explain memory hierarchy in computer system. Q13) What are the differences between magnetic tapes and magnetic disks? ZZZ D - 546 2

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