This set of Microprocessor Multiple Choice Questions & Answers (MCQs) focuses on “Semiconductor Memory Interfacing”.
1. The semiconductor memories are organised as __________ dimension(s) of array of memory locations.
a) one dimensional
b) two dimensional
c) three dimensional
d) none
View Answer
Explanation: The semiconductor memories are organised as two dimensions of an array which consists of rows and columns.
2. If a location is selected, then all the bits in it are accessible using a group of conductors called
a) control bus
b) address bus
c) data bus
d) either address bus or data bus
View Answer
Explanation: The bits in a selected location are accessible using data bus.
3. To address a memory location out of N memory locations, the number of address lines required is
a) log N (to the base 2)
b) log N (to the base 10)
c) log N (to the base e)
d) log (2N) (to the base e)
View Answer
Explanation: For n memory locations, log n(to the base of 2) address lines are required. For addressing 4K bytes of memory, 12 address lines are required since log(4KB) =log(4*1024)=log(212)=12.
4. If the microprocessor has 10 address lines, then the number of memory locations it is able to address is
a) 512
b) 1024
c) 2048
d) none
View Answer
Explanation: Since for n address lines, the number of memory locations able to address is 2^n.
5. In static memory, the upper 8-bit bank of an available 16-bit memory chip is called
a) upper address memory bank
b) even address memory bank
c) static upper memory
d) odd address memory bank
View Answer
Explanation: In static memory, the upper 8-bit bank is called odd address memory bank.
6. In static memory, the lower 8-bit bank of an available 16-bit memory chip is called
a) lower address memory bank
b) even address memory bank
c) static lower memory bank
d) odd address memory bank
View Answer
Explanation: In static memory, the lower 8-bit bank is called even address memory bank.
7. In most of the cases, the method used for decoding that may be used to minimise the required hardware is
a) absolute decoding
b) non-linear decoding
c) linear decoding
d) none
View Answer
Explanation: In general, linear decoding is used to minimise the required hardware.
8. To obtain 16-bit data bus width, the two 4K*8 chips of RAM and ROM are arranged in
a) parallel
b) serial
c) both serial and parallel
d) neither serial nor parallel
View Answer
Explanation: The two 4K*8 chips of RAM and ROM are arranged in parallel.
9. If (address line) Ao=0 then, the status of address and memory are
a) address is even and memory is in ROM
b) address is odd and memory is in ROM
c) address is even and memory is in RAM
d) address is odd and memory is in RAM
View Answer
Explanation: If Ao=0 then address is even and is in RAM. If Ao=1 then, address is odd and is in RAM.
10. If at a time Ao and BHE(active low) both are zero then, the chip(s) selected will be
a) RAM
b) ROM
c) RAM and ROM
d) ONLY RAM
View Answer
Explanation: If at a time Ao and BHE(active low) both are zero, then both RAM and ROM are selected.
Sanfoundry Global Education & Learning Series – Microprocessors.
Here’s the list of Best Reference Books in Microprocessors.
