This question paper contains 4 printed pages]
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BCA (Part II) Examination, 2022
DIGITAL ELECTRONICS &
COMPUTER ARCHITECTURE
Paper-I (BCA-201)
Time Allowed : Three Hours
Maximum Marks: 75
Attempt five questions in all, selecting one
question from each unit. All questions carry equal marks.
UNIT-I
1. Explain Electronic Components and write all the
properties of semiconductors.
Or
2. (a) Simplify AB + A(B + C) + B(B + C) using
Boolean algebra and draw logic circuit for
the simplified equation.
2406 1 Contd.
and
prove
pemorgan's theorems with
DemoOro
State
(b)
truth table.
of
Find
the 2's
complement
101110011
c)
UNIT-II
OR gate with a
logic diagram.
(a) Explain
3.
Implement XNOt gate with the help of
(b)
NAND gate. Show the output of each step.
What is the minimum number of gates
(c)
required to implement the Boolean function
have to only 2 input
(AB +C) if we use
NOR gates ?
Or
0
44. (a) Define flip-flop and mention the type
flip-flops.
(b) What is a Half-adder ? Give a logic diagram
(c) ste
Explain the basic function of shift registe
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2 [Contd
UNIT-III
register ?
5.
5. (a) What is an instruction
for CPU execution time
(b) Give the formula
for a program.
(c) Explain ALU components with diagram.
Or
6 (a) Explain Block diagram of computer system
and also define functions of different units.
(6) Discuss controlling of arithmetic operations
in computer system.
UNIT-IV
7. Explain different types of Addressing techni-
ques with suitable diagram.
Or
8 Define any three
(a) Scratch registers
(b) Accumulators
(c) Floating point
d) Status information.
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UNIT-V
Write difference between
9
(a) Static and Dynamic Memory.
6) EPROM and EEPROM
Cache memory and
(c) Virtual memory
Or
notes on
10 Write short
(a) Interconnecting system
components o
computer architecture.
(6) Basic architecture of PARÁM.
(c) IO cards in personal computers.
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