1. What kind of register(s) is/are most
suitable for serial data communication?
a.
PIPO
b.
SISO
c.
PISO and SIPO
d.
All of these
Ans: c
2. What is the function of the ENABLE input
of a PIPO register?
a.
To prevent accidental loading of the register.
b.
To force the outputs to the high impedance state when required.
c.
To enable or disable the shift register functionality.
d.
None of these.
Ans. b
3. How are data stored in a PIPO register
implemented using CMOS dynamic logic?
a.
As charge on tiny capacitors.
b.
In flip-flops.
c.
In an asynchronous feedback loop.
d.
None of these.
Ans. a
4. The number of additional NAND gates
required to construct a 4-bit shift register using S-R flip-flops is …………,
assuming that the serial input (SI) is available in both complemented and
un-complemented forms.
Ans. 0
5. A 25-bit Johnson counter will count
modulo-…………
Ans. 50
6. The maximum number of distinct patterns
that can be generated using a 8-bit linear feedback shift register (LFSR) is
…………..
Ans. 255
7. In an asynchronous binary counter
a.
All the flip-flops change state simultaneously in synchronism with the clock.
b.
The odd stages change state on the rising edge and the even stages change state
on the falling edge of the clock.
c.
Changes ripple from the most significant to the least significant stage.
d.
None of these.
Ans. No answer is correct
8. In an up-counting ripple counter,
a.
The first flip-flop from the left changes state at every clock pulse.
b.
The second flip-flop from the left changes state at every 2 clock pulses.
c.
The third flip-flop from the left changes state at every 4 clock pulses.
d.
All of these.
Ans. d
9. An 8-bit binary ripple counter can count
modulo-………
Ans. 256
10. In a 6-bit ripple counter, the number
of transient states between the count values 000000 and 111111 will be ………….
Ans. 5
11. The number of flip-flops required to
design a modulo-100 ripple counter will be ……..
Ans. 7
12. When a modulo-50, a modulo-10, and a
modulo-20 ripple counters are all connected in cascade, the combination will
count modulo-………
Ans. 10000
in assignment 10 please check the answers for following questions.
ReplyDeleteQ3,Q4,Q7
i think Q7-b
ReplyDeleteDo you mean assignment 9 or assignment 10.
ReplyDeleteAs per nptel lecture material, answer to question ten is 5 only
Verify 9 assignment
ReplyDeletebit 9 and bit 1 please verify once
ReplyDeleteBit 10 in assignment9
ReplyDelete