Wednesday, December 2, 2015

Dharmsinh Desai University Logical Organization of Computers 2008 Question Paper

Are you searching Dharmsinh Desai University question papers? Here you can find Logical Organization of Computers of 2008 in DDU

DHARMSINH DESAI UNIVERSITY, NADIAD
Third Sessional Examination [Semister : I (MCA)]
Subject: Logical Organization of Computers
Date: 11-12-2008 Time: 1 Hour Max Marks:36
Q.1 Answer the Following questions. [Marks : 12]
1 What is called negative edge triggering?
2 LSI Provides________, MSI Provides ___________ and VLSI Provides_______
maximum integrated gates.
3 A set of instructions is called _______________
4 There are different ___________ flags available in 8085 Microprocessor.
5 Multiple choice :
1 Data bus is a
a) Unidirectional b) Bidirectional c) Both
2 Control Bus has how many lines?
a) 8-bits b) 16-bits c) None of the above
3 Stack pointer consists total number of bits are
a) 8-bits b) 16-bits c) 32-bits
6 State True or False (Justify)
1) Program counter register store address of instructions
2) Two-Byte instructions stores opcode and operand in same memory location
3) In ripple counter pass clock signals to each flip flop
7 Match following table
Instructions Hex Code
ADD A 3EH
MVI A 87H
Q2. Answer the Following questions. [Any Three] [Marks 12]
A Discuss Master Slave Flip Flop with Diagram.
B Discuss BCD Ripple counter with appropriate logic gates.
C Explain data transfer and branch instruction set with appropriate example
D Draw a block diagram of RAM Memory unit and how to perform read operation.
E What is meant by Microprocessor? Draw 8085 microprocessor Hardware model
and explain functionality of each.
Q3. Answer the Following questions. [Marks : 12]
A Draw block diagram of memory cell [ 02 ]
B Discuss 4-bit binary Synchronous counter with appropriate logic gates. [ 05 ]
C Draw architecture of 8085 MPU and explain it. [ 05 ]
OR
A Check the addressing modes of the following instructions
1) LDAX B 2) LXI SP, 2000H 3) MOV A,B 4) LDA 2000H [ 02 ]
B Write a program to add two 8-bit data from memory location 0030H and 0031H.
Store result in accumulator register and Draw flowchart. [ 05 ]
C What is meant by shift register?
Explain Shift Right Operation with D-Flip Flop. [ 05 ]
---- BEST LUCK ----
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