Top 150+ Solved Microprocessors and Microcontrollers MCQ Questions Answer
Q. A real number consists of
a. integer part
b. integer part and fraction part
c. integer part, fraction part along with positive or negative sign
d. none of the above
Q. Assertion (A): Negative values of incremental operator in DO loop are allowed in Fortran 77 but not in earlier versions of Fortran. Reason (R): Fortran 77 has better array facilities than earlier versions of Fortran.
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
Q. Which of the following is not treated as hexadecimal constant by assembler in 8085?
a. 45 H
b. 6 AFH
c. 234
d. 64 H
Q. An I/O processor controls the flow of information between
a. cache memory and I/O devices
b. main memory and I/O devices
c. two I/O devices
d. cache and main memory
Q. When .9432 E – 4 is subtracted from .5452 E – 3 in normalized floating point mode
a. none of the numbers is changed
b. .9432 E – 4 is changed to .09432 E – 3 and .5452 E – 3 is not changed
c. .5452 E – 3 is changed to 5.452 E – 4 but .9432 E – 4 is not changed
d. both Ihe numbers are changed and their exponents are, made equal to -5
Q. DS directive in 8085
a. forces the assembler to reserve one byte of memory
b. forces the assembler to reserve a specified number of bytes in the memory
c. forces the assembler to reserve a specified number of consecutive bytes in the memory
d. none of the above
Q. The five flags in 8085 are designated as
a. Z, CY, S, P and AC
b. D, Z, S, P, AC
c. Z, C, S, P, AC
d. Z, CY, S, D, AC
Q. In 8085 which addressing mode is also called inherent addressing?
a. Direct
b. Register
c. Implicit
d. Immediate
Q. In a computer the data transfer between hard disk and CPU is nearly the same as that betweendiskette and CPU.
a. True
b. False
c. none
d. none
Q. The timing difference between a slow memory and fast processor can be resolved if
a. processor is capable of waiting
b. external buffer is used
c. either (a) or (b)
d. neither (a) nor (b)
Q. In 8086 the number of bytes which can be addressed directly is about
a. 1000
b. 10000
c. 100000
d. one million