A Level July, 2015
A4-R4: COMPUTER SYSTEM ARCHITECTURE
NOTE:IMPORTANT INSTRUCTIONS:
1. There are TWO PARTS in this Module/Paper. PART ONE contains FOUR questions and
PART TWO contains FIVE questions.
2. PART ONE is to be answered in the OMR ANSWER SHEET only, supplied with the
question paper, as per the instructions contained therein. PART ONE is NOT to be
answered in the answer book.
3. Maximum time allotted for PART ONE is ONE HOUR. Answer book for PART TWO will be
supplied at the table when the answer sheet for PART ONE is returned. However,
candidates, who complete PART ONE earlier than one hour, can collect the answer book for
PART TWO immediately after handing over the answer sheet for PART ONE.
TOTAL TIME: 3 HOURS TOTAL MARKS: 100
(PART ONE – 40; PART TWO – 60)
PART ONE
(Answer all the questions)
1. Each question below gives a multiple choice of answers. Choose the most appropriate one and enter in the “OMR” answer sheet supplied with the question paper, following instructions therein. (1x10)
A) 65,536
B) 64,536
C) 65,436
D) 65,546
1.2 Which one of the following CPU registers holds the address of the instructions (instructions
in the program stored in memory) to be executed next?
A) MAR (Memory address register)
B) MBR (Memory Buffer Register)
C) IR (Instruction Register)
D) PC (Program Counter)