This set of Embedded Systems Multiple Choice Questions & Answers (MCQs) focuses on “SRAM”.
1. Why is SRAM more preferably in non-volatile memory?
c) low power consumption
d) transistor as a storage element
Explanation: SRAM will retain data as long it is powered up and it does not need to be refreshed as DRAM. It is designed for low power consumption and used in preference. DRAM is cheaper than SRAM but it is based on refresh circuitry as it loses charge since the capacitor is the storage element.
2. Which of the following ahs refreshes control mechanism?
c) Battery backed-up SRAM
d) Pseudo-static RAM
Explanation: Pseudo RAM uses DRAM cells because of its higher memory density and it have refresh control which is an additional function of DRAM and is suitable for low power consumption. It has both the advantages of SRAM and DRAM.
3. Which storage element is used by MAC and IBM PC?
Explanation: CMOS is complementary metal oxide semiconductor which is used by MAC and IBM PC as storage element because it contains configuration data of SRAM and is battery back-up to ensure that it is powered up when the computer is switched off.
4. Which type of storage element of SRAM is very fast in accessing data but consumes lots of power?
Explanation: TTL or transistor-transistor logic which is a type of bipolar junction transistor access data very fastly but consumes lots of power whereas CMOS is used in low power consumption.
5. What is approximate data access time of SRAM?
Explanation: SRAM access data in approximately 4ns because of its flip-flop arrangement of transistors whereas the data access time in DRAM is approximately 60ns since it has a single capacitor for one-bit storage.
6. Who proposed the miniature card format?
Explanation: Miniature Card is an SRAM memory card proposed by Intel in the 1980s but it was no longer manufactured.
7. How many MOSFETs are required for SRAM?
Explanation: Six MOSFETs are required for a typical SRAM. Each bit of SRAM is stored in four transistors which form two cross-coupled inverters.
8. Which of the following is an SRAM?
Explanation: 1T-RAM is a pseudo-static RAM which is developed by MoSyS, Inc. PROM, EPROM, and EEPROM are non-volatile memories.
9. Which of the following can access data even when the power supply is lost?
a) Non-volatile SRAM
Explanation: Random Access Memory is the primary storage which can access data only when it is powered up. But non-volatile SRAM can access data even when the power supply is lost. It is used in many applications like networking, aerospace etc.
10. Which of the following can easily convert to a non-volatile memory?
c) DDR SRAM
d) Asynchronous DRAM
Explanation: The low power consumption makes SRAM easily convertible to non-volatile memory, by adding a small battery it can retain its data even when the main power is lost.
Sanfoundry Global Education & Learning Series – Embedded System.
To practice all areas of Embedded System, here is complete set of 1000+ Multiple Choice Questions and Answers.