A Level January, 2014 A4-R4: COMPUTER SYSTEM ARCHITECTURE

A Level January, 2014
A4-R4: COMPUTER SYSTEM ARCHITECTURE

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)

1.1 The no. of minterms in a truth table of n variables
A) n2
B) 2n
C) 2*n
D) n!
1.2 The algebraic function for XOR logic gate with two inputs A and B is
A) AA’ + BB’
B) A(A+B)
C) AB+A’B’
D) A’B+AB’

Nielit July, 2014 A4-R4: COMPUTER SYSTEM ARCHITECTURE

Nielit July, 2014
A4-R4: COMPUTER SYSTEM ARCHITECTURE
NOTE:
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)

1.1 Von Neumann architecture of computer is mainly characterized by
A) Separate storage and signal path ways for their instructions and data
B) Stored- program concept emphasizing storing of data as well as the instructions to
manipulate that data, in the same way
C) Swiftly execution of program
D) None of the above
1.2 A refinement of SR flip-flop in which indeterminate condition of the SR type is defined as
A) JK Flip-flop
B) D Flip-flop
C) T Flip-flop
D) None of the above

Nielit A Level January, 2015 A4-R4: COMPUTER SYSTEM ARCHITECTURE

Nielit A Level January, 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)

1.1 ________ is a circuit which has two stable states and can be used to store information.
A) Flip-flop
B) Logic circuit
C) Boolean circuit
D) Relational circuit

1.2 ________ selects one output signal from many input signals, hence it is also known as data
selector.
A) Encoder
B) Decoder
C) Multiplexer
D) Comparator

A Level July, 2015 A4-R4: COMPUTER SYSTEM ARCHITECTURE

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)

1.1 64K memory contains ________ words of 8 bits each?
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)