Random Access Memory – 1 MCQ’s

Digital Circuits Electronics & Communication Engineering

This set of Digital Circuits Multiple Choice Questions & Answers (MCQs) focuses on “Random Access Memory – 1″.

1. What are the typical values of tOE?
a) 10 to 20 ns for bipolar
b) 25 to 100 ns for NMOS
c) 12 to 50 ns for CMOS
d) All of the Mentioned

2. Which of the following is not a type of memory?
a) RAM
b) FPROM
c) EEPROM
d) ROM

3. What is the access time?
a) The time taken to move a stored word from one bit to other bits after applying the address bits
b) The time taken to write a word after applying the address bits
c) The time taken to read a stored word after applying the address bits
d) The time taken to erase a stored word after applying the address bits

4. The chip by which both the operation of read and write is performed __________
a) RAM
b) ROM
c) PROM
d) EPROM

5. If a RAM chip has n address input lines then it can access memory locations upto __________
a) 2(n-1)
b) 2(n+1)
c) 2n
d) 22n

6. Which of the following control signals are selected for read and write operations in a RAM?
a) Data buffer
b) Chip select
c) Read and write
d) Memory

7. RAM is also known as __________
a) RWM
b) MBR
c) MAR
d) ROM

8. The n-bit address is placed in the __________
a) MBR
b) MAR
c) RAM
d) ROM

9. Computers invariably use RAM for __________
a) High complexity
b) High resolution
c) High speed main memory
d) High flexibility

10. Static RAM employs __________
a) BJT or MOSFET
b) FET or JFET
c) Capacitor or BJT
d) BJT or MOS

11. Which one of the following is volatile in nature?
a) ROM
b) EROM
c) PROM
d) RAM

12. How many types of RAMs are?
a) 2
b) 3
c) 4
d) 5

13. Dynamic RAM employs __________
a) Capacitor or MOSFET
b) FET or JFET
c) Capacitor or BJT
d) BJT or MOS

14. The magnetic core memories have been replaced by semiconductor RAMs, why?
a) Semiconductor RAMs are highly flexible
b) Semiconductor RAMs have highest storing capacity
c) Semiconductor RAMs are smaller in size
d) All of the Mentioned

15. The data written in flip-flop remains stored as long as __________
a) D.C. power is supplied
b) D.C. power is removed
c) A.C. power is supplied
d) A.C. power is removed

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