1. Which has volatile memory?
a. Magnetic tape
b. RAM
c. Diskette
d. Hard disk
Ans- b. RAM
2. Consider the following tasks in a micro computer
1. Receiving data and instruction
2. Performing arithmetic computation
3. Performing logical computations
4. Storing data and instructions.
Which of the above are performed by ALU?
a. 2 only
b. 2 and 3 only
c. 1, 2 and 3 only
d. All
Ans- b. 2 and 3 only
3. Assertion (A): In 8085 SP and PC are 8 bit each.
Reason (R): 8085 is an 8 bit microprocessor.
a. Both A and R are correct and R is correct explanation of A
b. Both A and R are correct but R is not correct explanation of A
c. A is correct R is wrong
d. A is wrong R is correct
Ans - d. A is wrong R is correct
4. Assertion (A): To add 8 bit words, two 1C 74181 can be cascaded.
Reason (R): In 1C 74181 a sum greater than 15 leads to high carry out.
a. Both A and R are correct and R is correct explanation of A
b. Both A and R are correct but R is not correct explanation of A
c. A is correct R is wrong
d. A is wrong R is correct
Ans- c. A is correct R is wrong
5. Assertion (A): Microprocessor 8085 can address 65536 memory locations.
Reason (R): Microprocessor 8085 has 16 address lines.
a. Both A and R are correct and R is correct explanation of A
b. Both A and R are correct but R is not correct explanation of A
c. A is correct R is wrong
d. A is wrong R is correct
Ans- a. Both A and R are correct and R is correct explanation of A
6. IC 74181 performs arithmetic operations when M = 1.
a. TRUE
b. FALSE
Ans- b. FALSE
7. 8085 needs + 10 V supply.
a. TRUE
b. FALSE
Ans- b. FALSE
8. A microprocessor is generally
a. single chip SSI
b. single chip MSI
c. single chip LSI
d. any of the above
Ans- c. single chip LSI
9. A nibble corresponds to
a. 2 successive bits of data
b. 4 successive bits of data
c. 8 successive bits of data
d. 16 successive bits of data
Ans- b. 4 successive bits of data
10. Assertion (A): The data bus and address bus of 8085 are multiplexed.
Reason (R): Multiplexing reduces the number of pins.
a. Both A and R are correct and R is correct explanation of A
b. Both A and R are correct but R is not correct explanation of A
c. A is correct R is wrong
d. A is wrong R is correct
Ans- a. Both A and R are correct and R is correct explanation of A