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Assembly Language Question Paper

Assembly Language

Course:Bachelor Of Computer Science (It Telecommunication)

Institution: Kabarak University question papers

Exam Year:2010

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KABARAK UNIVERSITY
UNIVERSITY EXAMINATIONS
2010/2011 ACADEMIC YEAR
FOR THE DEGREE OF BACHELOR OF COMPUTER SCIENCE
COURSE CODE: COMP 210
COURSE TITLE: ASSEMBLY LANGUAGE
PROGRAMMING
STREAM: Y2S1
DAY: WEDNESDAY
TIME: 2.00 – 4.00 P.M.
DATE: 09/12/2010
INSTRUCTIONS:
1. This question paper has four questions
2. QUESTION ONE IS COMPULSORY AND HAS 30 MARKS
3. Answer any other two questions worth 20 marks
PLEASE TURNOVER
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QUESTION ONE (30 marks)
(a) Explain how you can use two’s complement to perform subtraction of binary
number with the use of addition operator (5mks)
(b) List any four segment registers in 8086 microprocessor (4mks)
(c) Write any three rules of using a MOV instruction with examples in each (6mks)
(d) Explain with examples any three stack instructions (6mks)
(e) What will be the result of performing SHR instruction on FEh. Demonstrate it and
give the answer in hexadecimal (5mks)
(f) Write an assembly language program to add 34h in BL register and 1Eh in AH
register. Copy the result in DH register. (4mks)
QUESTION TWO (20 marks)
(a) What happens to SP register when push operation is performed? (2mks)
(b) What is the use of CALL instruction? Differentiate between near CALL and far
CALL (3mks)
(c) Explain the structure of assembly language program (4mks)
(d) What is the use of XLAT instruction? (2mks)
(e) What is a bus? Explain three types of buses in 8086 (5mks)
(f) Perform the following operations. (i) 127 = (?)16
(ii) 255 = (?)8
(4mks)
QUESTION THREE (20 marks)
(a) What is the range in decimal of any possible five bits in representing binary
numbers (2mks)
(b) Write an assembly language program to copy data from one segment register to
another segment register using general register as an auxiliary (4mks)
(c) Explain the use of the following instructions
(i) MOVS/B/W
(ii) PUSHF
(iii) SUB (3mks)
(d) Explain the instruction execution cycle (6mks)
(e) List any three general purpose registers and their functions (3mks)
(f) What is wrong with these instructions;
i) MOV BH 256
ii) MOV 44H DL (2mks)
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QUESTION FOUR (20 marks)
(a) Draw a diagram to express hierarchy of memories in terms of speed and size
(4mks)
(b) Explain the data and address bus of 8086 microprocessor (4mks)
(c) What is an addressing mode? Explain with examples the following
(i) Register relative Addressing mode
(ii) Immediate addressing mode (5mks)
(d) Write Short notes on the following
(i) Procedures
(ii) Macros (4mks)
(e) Write an assembly language program to demonstrate the use of MUL instruction.
(3mks)

Assembly Language Question Paper

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