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Download IGNOU CS-64 Question Papers
Download IGNOU BCA previous years question papers of INTRODUCTION TO COMPUTER ORGANISATION (CS-64). Here I have uploaded question papers from June 2011 to June 2007. You can download these QPs at a time. I hope this would be a time saving task for you!
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CS-64: Introduction Computer Organisation June 2011 Question paper
IGNOU BCA 4th Semester CS-64: Introduction to Computer Organisation June, 2011 Question paper
Note : Question one is compulsory. Answer any three questions from the rest.
1. (a) List the basic key features of a von-Neuman machine. Also draw structure of von-Neuman machine.
(b) What is a combinational circuit? Draw a combinational circuit for Boolean expression
(c) Explain need of multiplexer. Also explain how a 4 X 1 multiplexer works.
(d) What is a bus? Explain the working of a shared bus system with an example.
(e) Explain the need of error detection and correction. What is a parity bit? How a parity bit can be used for the purpose of error detection?
(f) What is Addressing? List and explain any two addressing schemes with the help of an example of each.
2. (a) Simplify the following Boolean expression using K-Map
Also draw the logic circuit for the simplified Boolean expression.
(b) What is an interrupt? Explain U88 Of interrupt in assembly programming with an example.
(c) What is a hardwired control unit? Explain its advantages.
3. (a) Draw a combinational circuit for 3-bit odd parity generator. Also make truth table for it.
(b) What is random access memory (RAM)? Briefly explain working of RAM.
(c) Perform the following arithmetic operations on 8 bit numbers using 2's Complement notation. Indicate overflow/underflow, if any:
(i) 57–48
(ii) –82+41
4. (a) What are four types of segments in 8086 assembly programming ? Explain the use of ASSUME directive with an example.
(b) What are the four general purpose registers in 8086? Explain uses of each of them.
(c) What is redundant array of independent disk (RAID)? Explain three basic characteristics of RAID.
5. (a) Write an assembly program to add two 8 bit numbers.
(b) Differentiate between synchronous and asynchronous circuits. Also explain the need of a flip-flop in circuit design with the help of an example.
(c) Explain the following terms with the help of an example/ diagram/ illustrations, if needed.
(i) Assembler
(ii) Memory hierarchy.
BACHELOR IN COMPUTER APPLICATIONS
Term-End Examination
June, 2011
CS-64: INTRODUCTION TO COMPUTER ORGANISATION
Time : 3 Hours
Max. Marks : 75
Note : Question one is compulsory. Answer any three questions from the rest.
1. (a) List the basic key features of a von-Neuman machine. Also draw structure of von-Neuman machine.
(b) What is a combinational circuit? Draw a combinational circuit for Boolean expression
(d) What is a bus? Explain the working of a shared bus system with an example.
(e) Explain the need of error detection and correction. What is a parity bit? How a parity bit can be used for the purpose of error detection?
(f) What is Addressing? List and explain any two addressing schemes with the help of an example of each.
2. (a) Simplify the following Boolean expression using K-Map
Also draw the logic circuit for the simplified Boolean expression.
(b) What is an interrupt? Explain U88 Of interrupt in assembly programming with an example.
(c) What is a hardwired control unit? Explain its advantages.
3. (a) Draw a combinational circuit for 3-bit odd parity generator. Also make truth table for it.
(b) What is random access memory (RAM)? Briefly explain working of RAM.
(c) Perform the following arithmetic operations on 8 bit numbers using 2's Complement notation. Indicate overflow/underflow, if any:
(i) 57–48
(ii) –82+41
4. (a) What are four types of segments in 8086 assembly programming ? Explain the use of ASSUME directive with an example.
(b) What are the four general purpose registers in 8086? Explain uses of each of them.
(c) What is redundant array of independent disk (RAID)? Explain three basic characteristics of RAID.
5. (a) Write an assembly program to add two 8 bit numbers.
(b) Differentiate between synchronous and asynchronous circuits. Also explain the need of a flip-flop in circuit design with the help of an example.
(c) Explain the following terms with the help of an example/ diagram/ illustrations, if needed.
(i) Assembler
(ii) Memory hierarchy.
JUNE 2009 CS-64: INTRODUCTION TO COMPUTER ORGANISATION QUESTION PAPER
IGNOU BCA CS-64: INTRODUCTION TO COMPUTER ORGANIZATION - JUNE 2009 QUESTION PAPER
BACHELOR IN COMPUTER APPLICATIONS
Term-End Examination
June, 2009
CS-64: INTRODUCTION TO COMPUTER ORGANISATION
Time : 3 Hours
Max. Marks : 75
Note : Question one is compulsory. Answer any three questions from the rest.
1. (a) Using 2's complement notation perform the following arithmetic operations using 8-bit register.
(i) 25 + (-12)
(ii) 13 - 8
(iii) -19-17
(iv) -8 + 18
(v) 12 - (-9)
Also write overflow/underflow if any.
(b) Write a program for evaluating A*B/C+D/E-F using 2 address and 3 address machine instructions . Make assumptions, if required.
(c) How can a stack be used for implementing a subroutine call? Can this scheme be used to pass parameter also ? Justify your answer. [4 marks]
(d) Write program in 8086 assembly language to count the numbers of vowels in a given string. Assume that 20 byte long string is stored in data segment.[5 Marks]
(e) Draw an arithmetic pipeline for floating point subtraction.[5 Marks]
(f) What is RAID? What are RAID levels? Explain any two levels giving data distribution and advantages/disadvanteges of that level.[5marks]
2. (a) What is the need of having many addressing modes in a machine? Explain any four most important addressing modes for your machine and justify your selection. [5 Marks]
(b) Design a combinational circuit that generates an odd parity for four digit number input.[5 Marks]
(c) Give block diagram of DMA controller.How does CPU initialize the DMA transfer?[5 Marks]
3. (a) Write a program in 8086 assembly language to display a string stored in the data segment on the computer monitor,only if the first character of the string is an upper case alphabet.[5 Marks]
(b) Compare the various advantages and disadvantages of isolated mapped I/O scheme and memory mapped I/O scheme.[5 Marks]
(c) "Counter is a register". Justify your answer. Draw and explain the working priciples of a 4-bit asynchronus ripple counter.[5 Marks]
4. (a) Show that {NAND} is a functionally complete set of gates.Use it to construct the OR,AND and NOT gates.[5 Marks]
(b) Draw the circuit for 4-bit ROM having four words and explain the design.
(c) What is an interrupt? How is the interrupt 21 h used in 8086 microprocessor?
5. (a) Design a floating Point Number format for the following requirements:
Base:2
Mantissa: Normalized, should hold 4 significant decimal digits.
Exponent: Biased exponent in the range of +25 single precision.
Make suitable assumptions,if any.
(b) What is Wilkes control? Is it different from hardwired control? Justify. Also explain how a microprogram can be executed?
(c) Explain the use of 'AAA' and 'DAA' instructions with the help of an example of each, for 8086 micro-processor:
(a) Mask and insertion operation.
(b) Linker and Loader.
(c) Associative Memory.
(d) Co-processor and Peripheral processor.
(e) Multiplexer and Decoder.
6. Describe the following terms in context of computer organisation of 8086 micro-processor:
(a) Mask and insertion operation.
(b) Linker and Loader.
(c) Associative Memory.
(d) Co-processor and Peripheral processor.
(e) Multiplexer and Decoder.