Tiêu đề 3140707 - COA 2021S.pdf ✅

1 Seat No.: ________ Enrolment No.___________ GUJARAT TECHNOLOGICAL UNIVERSITY BE - SEMESTER–IV (NEW) EXAMINATION – SUMMER 2021 Subject Code:3140707 Date:06/09/2021 Subject Name:Computer Organization & Architecture Time:02:30 PM TO 05:00 PM Total Marks:70 Instructions: 1. Attempt all questions. 2. Make suitable assumptions wherever necessary. 3. Figures to the right indicate full marks. 4. Simple and non-programmable scientific calculators are allowed. Marks Q.1 (a) State differences between hardwired control unit and microprogrammed control unit. 03 (b) Explain register stack and memory stack. 04 (c) Show the contents of registers E, AC, BR, QR and SC during the process of multiplying 11111 with 10101. 07 Q.2 (a) Write down RTL statements for the fetch and decode operation of basic computer. 03 (b) Define pipelining. For arithmetic operation (Ai *Bi + Ci) with a stream of seven numbers (i=1 to 7). Specify a pipeline configuration to carry out this task. 04 (c) Write a program to evaluate the arithmetic statement: A*B+C*D+E i. Using an accumulator type computer. ii. Using a stack organized computer. 07 OR (c) A non-pipeline system takes to process a task. The same task can be processed in a six segment pipeline with a clock cycle of 10ns. Determine the speedup ratio of the pipeline for 100 tasks. What is the maximum speed up that can be achieved? 07 Q.3 (a) List down six major characteristics of RISC processors. 03 (b) Explain how (r-1)’s complement is calculated. Calculate 9’s complement of 546700. 04 (c) Elaborate CPU-IOP communication. 07 OR Q.3 (a) List and explain major instruction pipeline conflicts. 03 (b) Define RTL. Give block diagram and timing diagram of transfer of R1 to R2 when P=1. 04 (c) Elaborate content addressable memory (CAM). 07 Q.4 (a) Explain memory hierarchy in brief. 03 (b) Draw and explain flowchart for first pass of assembler. 04 (c) Explain using a flowchart how address of control memory is selected in microprogrammed control unit. 07 OR Q.4 (a) Briefly explain DMA. 03 (b) Write assembly level program to subtract two given numbers. 04 (c) Write the symbolic microprogram routine for the BSA instruction. Use the microinstruction format of basic microprogrammed control unit. 07