8086 Microprocessor Set 4
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This set of 8086 Microprocessor Multiple Choice Questions & Answers (MCQs) focuses on 8086 Microprocessor Set 4
Q1 | What is DEN?
- direct enable
- data entered
- data enable
- data encoding
Q2 | In 8086, Example for Non maskable interrupts are ________.
- trap
- rst6.5
- intr
- rst6.6
Q3 | In 8086 the overflow flag is set when _____________.
- the sum is more than 16 bits.
- signed numbers go out of their range after an arithmetic operation.
- carry and sign flags are set.
- subtraction
Q4 | In 8086 microprocessor the following has the highest priority among all type interrupts?
- nmi
- div 0
- type 255
- over flow
Q5 | In 8086 microprocessor one of the following statements is not true?
- coprocessor is interfaced in max mode.
- coprocessor is interfaced in min mode.
- i /o can be interfaced in max / min mode.
- supports pipelining
Q6 | Address line for TRAP is?
- 0023h
- 0024h
- 0033h
- 0099h
Q7 | Access time is faster for _________.
- rom
- sram
- dram
- eram
Q8 | The First Microprocessor was__________.
- intel 4004
- 8080
- 8085
- 4008
Q9 | Status register is also called as ___________.
- accumulator
- stack
- counter
- flags
Q10 | Which of the following is not a basic element within the microprocessor?
- microcontroller
- arithmetic logic unit (alu)
- register array
- control unit
Q11 | Which method bypasses the CPU for certain types of data transfer?
- software interrupts
- interrupt-driven i/o
- polled i/o
- direct memory access (dma)
Q12 | The first microprocessor had a(n)________.
- 1 – bit data bus
- 2 – bit data bus
- 4 – bit data bus
- 8 – bit data bus
Q13 | Which microprocessor has multiplexed data and address lines?
- 8086
- 80286
- 80386
- pentium
Q14 | Which is not an operand?
- variable
- register
- memory location
- assembler
Q15 | A 20-bit address bus can locate ________.
- 1,048,576 locations
- 2,097,152 locations
- 4,194,304 locations
- 8,388,608 locations
Q16 | Which of the following is not an arithmetic instruction?
- inc (increment)
- cmp (compare)
- dec (decrement)
- rol (rotate left)
Q17 | During a read operation the CPU fetches ________.
- a program instruction
- another address
- data itself
- all of the above
Q18 | Which of the following is not an 8086/8088 general-purpose register?
- code segment (cs)
- data segment (ds)
- stack segment (ss)
- address segment (as)
Q19 | A 20-bit address bus allows access to a memory of capacity
- 1 mb
- 2 mb
- 4 mb
- 8 mb
Q20 | Which microprocessor accepts the program written for 8086 without any changes?
- 8085
- 8086
- 8087
- 8088
Q21 | Which group of instructions do not affect the flags?
- arithmetic operations
- logic operations
- data transfer operations
- branch operations
Q22 | The result of MOV AL, 65 is to store
- store 0100 0010 in al
- store 42h in al
- store 40h in al
- store 0100 0001 in al
Q23 | Which is not part of the execution unit (EU)?
- arithmetic logic unit (alu)
- clock
- general registers
- flags
Q24 | A microprocessor is a chip integrating all the functions of a CPU of a computer.
- multiple
- single
- double
- triple
Q25 | Microprocessor is a/an circuit that functions as the CPU of the compute
- electronic
- mechanic
- integrating
- processing