B.C.A. (Semester II) (CBCS) Examination Mar/Apr-2018
DIGITAL ELECTRONICS
Time: 2½ Hours
Max. Marks: 70
Instructions: All questions are compulsory. Figures to the right indicate full marks. Neat diagram must be drawn wherever necessary.
Q.1
Choose the correct alternatives:
14
memory is used in CPU.
Register
DVD
USB
Hard Disc Drive
is an unweighted code.
Binary
Octal
Decimal
Gray
8086 microprocessor is a bit processor.
16
20
8
10
storage device is a flash storage device.
CD-RAM
USB
HDD
FDD
Which bus is unidirectional Bus
Data
Address
a and b
None of these
Pentium 4
Hyper-pipelined Technology
Hyper-Threading Technology
Advanced Transfer cache
All of these
IC 7447
BCD to seven segment decoder
Counter
NAND
None of these
CISC
Computer instruction set code
Complex instruction set computing
Complex internal set computing
Computer index set computing
UART
Universal Asynchronous Rate Transmitter
Undefined Asynchronous Receiver Transmitter
Universal Asynchronous Receiver Transmitter
Unidirectional Asynchronous Receiver Transmitter
10) Intel first microprocessor was introduced in
1975
1985
1971
1982
Page 2 of 2
SLR-SR-9
11) When AND gate output is high?
One input is high
Both input high
Both input low
None of these
12) Full Adder
Two input two output
Three Input two output
Three Input one output
One input two output
13) DMA
Direct Memory Access
Direct Media Access
Define Memory Access
None of these
14) 3 bit counter how many Flip-Flop required?
5
4
3
2
Q.2
Solve any seven from the following
14
What is the bus? Give its types.
Write feature of 8086 microprocessor.
What is the cache memory?
Draw logic gate symbol of AND, OR, NAND and EX-OR gate.
What is RISC?
Define DMA.
What is Von-Neumann architecture?
To convert given binary no. (10101) to gray number.
Define RS-232.
Q.3
Attempt any two of the following
Write a short note on half ADDER.
Write a note on memory parameters.
Draw and explain UART block diagram.
10
Explain concept of memory hierarchy.
04
Q.4
Attempt any two of the followings:
14
Write a note on pipeline.
Explain stack organization of microprocessor.
Explain K map using example.
Q.5
Attempt any two of the followings:
14
Draw internal block diagram of 8086 microprocessor. Explain BIU Section.
Draw and explain Harvard architecture 3 of PC.
Explain USB Storage devices.