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PUNJAB TECHNICAL UNIVERSITY MCA - II (SEM 3) SEP 2010 : 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) (LE) (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 purpose of flip-flops? b) What do you mean by binary adder? c) What are timing signals? d) Define effective address. e) What is stack pointer? f) Define control word. g) What are I/O channels? h) What are the different types of interrupts? i) Give an example of a RISC I instructions that will perform the following operations: (i) Decrement a register (ii) Complement a register (iii) Negate a register j) What do you mean by handshaking? k) What is hardwired control unit? l) Define associative memory. m) What is virtual address? n) A-529 What is page frame and page fault? P.T.O. o) A magnetic disc system has the following parameters: Ts = average time to position the magnetic head over a track R = rotation speed of disk in revolutions per second Nt = number of bits per track Ns = number of bits per sector Section - B Q2) (9 5 = 45) Simplify the following Boolean function in product-of-sums form by means of a four-variable map. Draw the logic diagram with (a) OR-AND gates; (b) NOR gates F(w,x,y,z)= (2,3,4,5,6,7,11,14,15) Q3) Show that a JK flip-flop can be converted to a D flip-flop with an inverter between the J and K inputs. Q4) Explain Bi-directional shift registers with parallel load. Also explain its diagram and table. Q5) Draw the block diagram of a dual 4-to-1line multiplexers and explain its operation by means of a function table. Q6) Explain different instruction formats. Q7) What are the basic differences between a branch instruction, a call subroutine instruction, and program interrupt? Q8) Describe the control memory. Also explain the diagram of microprogrammed control organization. Q9) Differentiate between RISC and CISC. Q10) Discuss in detail the I/O interface. Q11) What is Cache memory? How can you write into cache? Q12) How memory management is done? Explain with the help of example. Q13) Discuss in detail the concept of main memory. Also explain the memory address map. kbkb A-529 2

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Additional Info : Mca - II(sem 3) September 2010 Question Paper - Computer System Architechture
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