This set of Embedded Systems Multiple Choice Questions & Answers (MCQs) focuses on “Memory and Peripherals of Embedded System”.
1. It retains its content when power is removed. What type of memory is this?
a) Volatile memory
b) Nonvolatile memory
Explanation: Nonvolatile devices are those which always retains it content even when any abrupt change occurs and nonvolatile memory are a kind of such devices. But RAM is a volatile memory which is a primary storage that can only access its data only when the device is powered and SRAM is a type of RAM which is called Static RAM.
2. Name a volatile memory.
Explanation: Volatile memory is those which can access data only when the device is powered.
3. Name a nonvolatile memory.
Explanation: Non-volatile memory is the one which retains its content even when the power is removed. This is done by an on-chip read only memory (ROM) or an external EPROM. The software that it contains the program which is capable of obtaining the full software from another source within or outside of the system. This initialisation routine is also referred to as bootstrap program or routine.
4.The initial routine is often referred to as
a) Initial program
b) Bootstrap program
c) Final program
d) Initial embedded program
Explanation: ROM contains the program which is capable of obtaining the full software from another source within or outside of the system. This initialisation routine is also referred to as bootstrap program or routine.
5. What kind of socket does an external EPROM to plugged in for prototyping?
b) Single socket
d) Piggyback reset socket
Explanation: Some controllers use a special package called piggyback socket on the top of the package to allow the EPROM for prototyping.
6. Which one of the following is UV erasable?
a) Flash memory
Explanation: EPROM is an erasable program and it can be erased by ultraviolet radiations. SRAM and DRAM are volatile memories. Flash memory to is a volatile memory but it is not UV erasable.
7. What kind of memory does an OTP have?
Explanation: OTP is one-time programming so it should possess a nonvolatile memory and EPROM is a nonvolatile memory whereas SRAM, DRAM and RAM are volatile memories.
8. Which type of memory is suitable for low volume production of embedded systems?
Explanation: The devices which use non-volatile memory allow the software to download and returned in the device. UV erasable EPROM is favorable but EEPROM is also a gaining favor. Therefore, this type of memory is used in low volume production.
9.Which is the single device capable of providing prototyping support for a range of microcontroller?
b) Umbrella device
Explanation: Umbrella device is capable of providing prototyping support for a range of microcontrollers.
10. What type of memory is suitable for high volume production?
Explanation: Read Only Memory is suitable for high volume production since it is a nonvolatile memory.
11. What type of memory is suitable for medium volume production?
a) Umbrella devices
Explanation: One-time programmable memory is also a nonvolatile memory so it is used for medium volume production.
12. How an embedded system communicate with the outside world?
Explanation: The system communicates with the outside world through peripherals.
13. How the input terminals are associated with the external environments?
Explanation: Sensors measures the physical quantity and convert it into electrical means whereas actuators convert electrical quantity into physical quantity.
14. Which of the following are external pins whose logic state can be controlled by the processor to either be a logic zero or logic one is known as
a) Analogue value
b) Display values
c) Binary values
d) Time derived digital outputs
Explanation: Binary values possess logic zeros and logic ones.
15. What kind of visual panel is used for seven segmented display?
c) Binary output
d) Analogue output
Sanfoundry Global Education & Learning Series – Embedded System.
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