Download GTU B.Tech 2020 Summer 4th Sem 3140707 Computer Organization And Architecture Question Paper

Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Summer 4th Sem 3140707 Computer Organization And Architecture Previous Question Paper

Seat No.: ________
Enrolment No.___________


GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER? IV EXAMINATION ? SUMMER 2020
Subject Code: 3140707 Date:27/10/2020
Subject Name: Computer Organization & Architecture
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.



Marks
Q.1
(a) Enlist register reference instructions and explain any one of them in
03
detail.

(b) What is combinational circuit? Explain multiplexer in detail. How
04
many NAND gates are needed to implement 4 x 1 MUX?

(c) Draw the flowchart for instruction cycle and explain.
07


Q.2
(a) What is RAM and ROM?
03

(b) One hypothetical basic computer has the following specifications:
04
Addressing Mods = 16
Total Instruction Types = 4 (IT1, IT2, IT3, IT4)
Each of the instruction type has 16 different instructions.
Total General-Purpose Register = 8
Size of Memory = 8192 X 8 bits
Maximum number of clock cycles required to execute one instruction
= 32
Each instruction of the basic computer has one memory operand and
one register operand in addition to other required fields.
a. Draw the instruction word format and indicate the number of
bits in each part.
b. Draw the block diagram of control unit.

(c) Write an assembly language program to find the Fibonacci series up
07
to the given number.


OR


(c) Write a
n assembly language program to find average of 15 numbers

stored at consecutive location in memory.



Q.3
(a) Which are different pipeline conflicts. Describe.
03

(b) What is assembler? Draw the flowchart of second pass of the
04
assembler.

(c) Write a note on arithmetic pipeline.
07


OR

Q.3
(a) What is address sequencing? Explain.
03

(b) Design a simple arithmetic circuit which should implement the
04
following operations: Assume A and B are 3 bit registers.
Add : A+B, Add with Carry: A+B+1, Subtract: A+B', Subtract with
Borrow: A+B'+1, Increment A: A+1, Decrement A: A-1, Transfer A:
A
1

---

(c) Explain how addition and subtraction of signed data is performed if a
07


computer system uses signed magnitude representation.



Q.4
(a) Enlist different status bit conditions.
03

(b) What is addressing mode? Explain direct and indirect addressing mode
04
with example.

(c) What is cache memory address mapping? Which are the different
07
memory mapping techniques? Explain any one of them in detail.


OR

Q.4
(a) Differentiate isolated I/O and memory mapped I/O.
03

(b) Compare and contrast RISC and CISC.
04

(c) Explain booth's multiplication algorithm with example.
07



Q.5
(a) What is associative memory? Explain.
03

(b) Differentiate between paging and segmentation techniques used in
04
virtual memory.

(c) Write a note on asynchronous data transfer.
07


OR

Q.5
(a) Write about Time-shared common bus interconnection structure.
03
(b) Explain the working of Direct Memory Access (DMA).
04
(c) Write a note on interprocess communication and synchronization.
07

*********
2

---