Top 150+ Solved 8086 Microprocessor MCQ Questions Answer
Q. In 8086 the overflow flag is set when _____________.
a. the sum is more than 16 bits.
b. signed numbers go out of their range after an arithmetic operation.
c. carry and sign flags are set.
d. subtraction
Q. In 8086 microprocessor the following has the highest priority among all type interrupts?
a. nmi
b. div 0
c. type 255
d. over flow
Q. In 8086 microprocessor one of the following statements is not true?
a. coprocessor is interfaced in max mode.
b. coprocessor is interfaced in min mode.
c. i /o can be interfaced in max / min mode.
d. supports pipelining
Q. Which of the following is not a basic element within the microprocessor?
a. microcontroller
b. arithmetic logic unit (alu)
c. register array
d. control unit
Q. Which method bypasses the CPU for certain types of data transfer?
a. software interrupts
b. interrupt-driven i/o
c. polled i/o
d. direct memory access (dma)
Q. The first microprocessor had a(n)________.
a. 1 – bit data bus
b. 2 – bit data bus
c. 4 – bit data bus
d. 8 – bit data bus
Q. Which microprocessor has multiplexed data and address lines?
a. 8086
b. 80286
c. 80386
d. pentium
Q. A 20-bit address bus can locate ________.
a. 1,048,576 locations
b. 2,097,152 locations
c. 4,194,304 locations
d. 8,388,608 locations
Q. Which of the following is not an arithmetic instruction?
a. inc (increment)
b. cmp (compare)
c. dec (decrement)
d. rol (rotate left)