This set of Digital Electronic/Circuits Quiz focuses on “Fast Adder & Serial Adder – 2”.
1. A serial subtractor can be obtained by converting the serial adder by using the
a) 1’s complement system
b) 2’s complement system
c) 10’s complement
d) None of the Mentioned
Explanation: A serial subtractor can be obtained by converting the serial adder by using the 2’s complement system.
2. The hexadecimal number (4B)16 is transmitted as an 8-bit word in parallel. What is the time required for this transmission if the clock frequency is 2.25 MHz?
a) 444 ns
b) 444 s
c) 3.55 s
d) 3.55 ms
Explanation: Because the clock pulse of 4-bit transmit the data of 8-bit word in parallel mode and this transmission done at 2.25 MHz frequency. We know that: f=1/t and we can find the time required for this transmission by the clock pulse.
3. Internally, a computer’s binary data are always transmitted on parallel channels which is commonly referred to as the
a) Parallel bus
b) Serial bus
c) Data bus
d) Memory bus
Explanation: A computer’s data is always in the binary form which is stored in the bus that transmit the data on any channels. It doesn’t matter that it’s in parallel or serial.
4. What is the frequency of a clock waveform if the period of that waveform is 1.25sec?
a) 8 kHz
b) 0.8 kHz
c) 0.8 MHz
d) 8 MHz
Explanation: By using the formula of frequency, we can find the frequency of clock waveform. Time period(t) of the waveform is = 1.25microseconds
Where ‘t’ is the time taken by the clock waveform;
so, f=0.8 MHz.
5. Why is parallel data transmission preferred over serial data transmission for most applications?
a) It is much slower
b) It is cheaper
c) More people use it
d) It is much faster
Explanation: Parallel data transmission preferred over serial data transmission for most applications because it is much faster.
6. With surface-mount technology (SMT), the devices should:
a) Utilize transistor outline connections
b) Mount directly
c) Have parallel connecting pins
d) Require holes and pads
Explanation: Surface-mount technology (SMT) is a method for producing electronic circuits in which the components are mounted or placed directly onto the surface of printed circuit boards (PCBs). An electronic device so made is called a surface-mount device (SMD). In the industry it has largely replaced the through-hole technology construction method of fitting components with wire leads into holes in the circuit board. Both technologies can be used on the same board for components not suited to surface mounting such as large transformers and heat-sinked power semiconductors.
7. In the most applications, transistor switches used in place of relays?
a) They consume less power
b) They are faster
c) They are quieter and smaller
d) All of the Mentioned
Explanation: Transistors are of less consuming power, faster, quieter, smaller and its implementation is too easy. So, in most applications transistor switches are more preferred.
8. What can a relay provide between the triggering source and the output that semiconductor switching devices cannot?
a) Total isolation
c) Higher current rating
d) Total isolation and higher current rating
Explanation: A relay provide total isolation and higher current rating between the triggering source and the output that semiconductor switching devices cannot provide.
9. The serial format for transmitting binary information uses
a) A single conductor
b) Multiple conductors
c) Infrared technology
Explanation: A conductor accepts the whole data and arrange it in a serial manner, which is transmitted as binary information.
10. Serial communication can be sped up by
a) Using silver or gold conductors instead of copper
b) Using high-speed clock signals
c) Adjusting the duty cycle of the binary information
d) Using silver or gold conductors instead of copper and high-speed clock signals
Explanation: For any serial data transmission there is required of continuously data supply and if the input supply (i.e. high speed clock signals) in high amount the speed of serial communication can be increased.
Sanfoundry Global Education & Learning Series – Digital Circuits.
To practice all areas of Digital Electronic Circuits for quizzes, here is complete set of 1000+ Multiple Choice Questions and Answers.