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WorksheetsUNIT-8
Total questions: 27
Worksheet time: 16mins
Name
Class
Date
1.
Which of the Following is not correct for the D Flip Flop?
a)
The Output toggles if one of the input is held high
b)
Q output follows the Input D when the enable is high
c)
Only one of the input can be high at a time
d)
The output compliment follows the input when enabled
2.
What is the Output condition of JK Flip Flop when inputs J= 0 & K= 0?
a)
Set
b)
Reset
c)
Toggle
d)
No change
3.
Which of the following is not generally associate with Flipflops?
a)
Hold Time
b)
Propogation Delay Time
c)
Interval time
d)
setup time
4.
Which of following is an ADVANTAGE of an Asynchronous Counter Circuit?
a)
High Propogation Delay
b)
Produces Decoding Error
c)
Prone to Glitches
d)
Simple Circuit Design
5.
Which of the following is the alternative name for 4-bit Binary Counter?
a)
MOD-10 Counter
b)
MOD-6 Counter
c)
MOD-16 Counter
d)
MOD-4 Counter
6.
The modulus of a counter is
a)
the number of flip-flops
b)
the actual number of states in its sequence
c)
the number of times it recycles in a second
d)
the number of logic gates used
7.
A decade counter with a count of zero (0000) through nine (1001) is known as
a)
an ASCII counter
b)
a binary counter
c)
A BCD counter
d)
an octal counter
8.
Which of the following is NOT the alternate name for BCD Counter?
a)
4-bit Binary Counter
b)
Decade Counter
c)
Divide by 10 Counter
d)
Modulus of 10 Counter
9.
Which of the following is a valid state in an 8421 BCD counter?
a)
1010
b)
1011
c)
1111
d)
1000
10.
A 3-bit binary counter has a maximum modulus of
a)
3
b)
6
c)
8
d)
16
11.
A 5-bit binary counter has a maximum modulus of
a)
5
b)
8
c)
16
d)
32
12.
A modulus-12 counter must have
a)
12 flip-flops
b)
3 flip-flops
c)
4 flip-flops
d)
synchronous clocking
13.
A 4-bit ripple counter consists of flip-flops that each have a propagation delay from clock to Q output of 12 ns. For the counter to recycle from 1111 to 0000, it takes a total propogation delay of _______________.
a)
12 ns
b)
24 ns
c)
36 ns
d)
48 ns
14.
Which of the following IC is the synchronous, presettable, 4-bit binary counter?
a)
IC 7490
b)
IC 7493
c)
IC 74160
d)
IC 74163
15.
A 4-bit binary up/down counter is in the binary state of zero. The next state in the DOWN Counter mode is ___________.
a)
(0001)2
b)
(1111)2
c)
(1101)2
d)
(1110)2
16.
Three cascaded modulus-10 counters have an overall modulus of
a)
30
b)
100
c)
1000
d)
10000
17.
Which of the following MOD Counter is widely used in Digital Clock?
a)
MOD-5
b)
MOD-9
c)
MOD-10
d)
MOD-30
18.
Which type of the Counter or Shift Register is used in Automatic Parking Control Circuit?
a)
Up-Down Counter
b)
Bidirectional Shift Register
c)
Universal Shift Register
d)
Ring Counter
19.
Which of the following type of shift register is similar to Multiplexing Technique?
a)
SISO
b)
SIPO
c)
PISO
d)
PIPO
20.
The output frequency of single flip-flop will be ________ of input frequency of flip-flop.
a)
divide by 2
b)
divide by 4
c)
divide by 8
d)
divide by 16
21.
To enter a byte of data serially into an 8-bit shift register, there must be
a)
one clock pulse
b)
two clock pulses
c)
four clock pulses
d)
eight clock pulses
22.
To parallel load a byte of data into a shift register with a synchronous load, there must be
a)
one clock pulse
b)
one clock pulse for each 1 in the data
c)
eight clock pulses
d)
one clock pulse for each 0 in the data
23.
With a 100 kHz clock frequency, eight bits can be serially entered into a shift register in
a)
80 μs
b)
8 μs
c)
80 ms
d)
100 ms
24.
With a 1 MHz clock frequency, eight bits can be parallel entered into a shift register
a)
1 μs
b)
8 μs
c)
in the propagation delay time of EIGHT flip-flops
d)
in the propagation delay time of ONE flip-flop
25.
Identify The IC number for Bidirectional Universal Shift Register
a)
IC 7495
b)
IC 74164
c)
IC 74194
d)
IC 74195
26.
A modulus-8 ring counter requires
a)
8 Flip-flops
b)
4 Flip-flops
c)
12 Flip-flops
d)
5 Flip-flops
27.
A modulus-8 Johnson counter requires
a)
8 Flip-flops
b)
4 Flip-flops
c)
12 Flip-flops
d)
5 Flip-flops
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