ECE QUIZ :5

Online Examination for ECE Quiz Question And Answer

Online Test

1. How many flip-flops are in the 7475 IC?

1
2
4
8
-----------------------------------------------------------------------------------------------------------------
2. How many flip-flops are required to produce a divide-by-128 device?

1
4
6
7
-----------------------------------------------------------------------------------------------------------------
3. Which is not an Altera primitive port identifier?

clk
ena
clr
prn
-----------------------------------------------------------------------------------------------------------------
4. The timing network that sets the output frequency of a 555 astable circuit contains ________.

three external resistors are used
two external resistors and an external capacitor are used
an external resistor and two external capacitors are used
no external resistor or capacitor is required
-----------------------------------------------------------------------------------------------------------------
5. What is the difference between the enable input of the 7475 and the clock input of the 7474?

The 7475 is edge-triggered
The 7474 is edge-triggered.
The 7454 is edge-triggered.
The 7489 is edge-triggered.
-----------------------------------------------------------------------------------------------------------------
6. The phenomenon of interpreting unwanted signals on J and K while Cp (clock pulse) is HIGH is called ________

parity error checking
ones catching
digital discrimination
digital filtering
-----------------------------------------------------------------------------------------------------------------
7. What is another name for a one-shot?

Monostable
Multivibrator
Bistable
Astable
-----------------------------------------------------------------------------------------------------------------
8. On a master-slave flip-flop, when is the master enabled?

when the gate is LOW
when the gate is HIGH
both of the above
neither of the above
-----------------------------------------------------------------------------------------------------------------
9. One example of the use of an S-R flip-flop is as a(n)

racer
astable oscillator
binary storage register
transition pulse generator
-----------------------------------------------------------------------------------------------------------------
10. What is the difference between the 7476 and the 74LS76?

the 7476 is master-slave, the 74LS76 is master-slave
the 7476 is edge-triggered, the 74LS76 is edge-triggered
the 7476 is edge-triggered, the 74LS76 is master-slave
the 7476 is master-slave, the 74LS76 is edge-triggered
-----------------------------------------------------------------------------------------------------------------
Score =
Correct answers: