MCQs on Digital Electronics and Systems – Microcontrollers
1 - Question
What is the major difference between a microprocessor and a microcontroller?
a) Presence of external peripherals
b) Presence of internal peripherals
d) Stack Pointer
Explanation: RAM, ROM, EEPROM are used as an external circuit in case of the microprocessor, but these are already embedded in a microcontroller. Due to the use of external circuits microprocessors are bulkier as compared to the microcontrollers which are more compact.
2 - Question
Which among the following is a property of a microcontroller?
a) High power devices
b) Low power devices
c) High cost
d) Large size
Explanation: One of the important properties of a microcontroller is that it is a low power device and may consume only 50 watts of energy. In addition to this, it has low cost and less size as compared to a microprocessor.
3 - Question
Microcontrollers have high cost and large size.
Explanation: The microcontrollers have generally small size and high cost. The components chosen for the microcontrollers have generally low size and low cost. One of the important properties of a microcontroller is that it is a low power device and may consume only 50 watts of energy. advertisement
4 - Question
How many bytes can a typical low-end microcontroller have?
a) 100 bytes
b) 500 bytes
c) 1000 bytes
d) 300 bytes
Explanation: A low-end microcontroller chip has 20 bytes of RAM and 1000 bytes of ROM. These chips can sometimes have very low cost and very less size suitable for limited applications.
5 - Question
Which among the following is the main advantage of a microcontroller?
a) Simple programming
b) High-level programming
d) High voltage requirement
Explanation: Microcontroller uses a simple language and it is therefore very easy and flexible to design software. The voltage requirement is very low and it has a very low cost.
6 - Question
PIC is a microcontroller.
Explanation: The peripheral interface controller is a microcontroller which is made by microchip technology and derived from PIC1650. Its name is currently expanded as a programmable intelligent computer.
7 - Question
Which among the following is not a hardware feature of PIC?
d) Watchdog timer
Explanation: Some of the hardware features of the PIC microcontroller is that they have Flash memory, SRAM, EEPROM, sleep mode, watchdog timer, various crystal or RC oscillator configurations, or an external clock.
8 - Question
In compact systems, we can use ____
Explanation: In compact systems, we can use Microcontrollers and hence microcontrollers are more effective as compared to the microprocessors, and they are also less costly as compared to the microprocessors.
9 - Question
Harvard architecture is used in ____
c) computer systems
d) operating Systems
Explanation: The architecture used in the Microcontrollers is Harvard architecture. Due to this the program memory and the data memory are separate. This is one of the advantages of the microcontroller.
10 - Question
Which among the following applications are not microcontroller based?
a) Computer system
b) Washing Machines
c) MP3 players
Explanation: In Computer systems, Microprocessors are generally used. Some of the applications of a microcontroller are in washing machines, automobiles, telephones, appliances and peripherals for computer systems.