Top 150+ Solved Microprocessors and Microcontrollers MCQ Questions Answer

From 121 to 135 of 144

Q. What is DEN?

a. direct enable

b. data entered

c. data enable

d. data encoding

  • c. data enable

Q. In 8086, Example for Non maskable interrupts are .

a. TRAP

b. RST6.5

c. INTR

d. RST6.6

  • a. TRAP

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

  • b. signed numbers go out of their range after an arithmetic operation.

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

  • b. coprocessor is interfaced in min mode.

Q. Address line for TRAP is?

a. 0023H

b. 0024H

c. 0033H

d. 0099H

  • b. 0024H

Q. Access time is faster for .

a. ROM

b. SRAM

c. DRAM

d. ERAM

  • b. SRAM

Q. The First Microprocessor was .

a. Intel 4004

b. 8080

c. 8085

d. 4008

  • a. Intel 4004

Q. Status register is also called as .

a. accumulator

b. stack

c. counter

d. flags

  • d. flags

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

  • a. Microcontroller

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)

  • d. Direct memory access (DMA)

Q. Which bus is bidirectional?

a. Address bus

b. Control bus

c. Data bus

d. None of the above

  • c. Data bus

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

  • c. 4 – bit data bus

Q. Which microprocessor has multiplexed data and address lines?

a. 8086

b. 80286

c. 80386

d. Pentium

  • a. 8086

Q. Which is not an operand?

a. Variable

b. Register

c. Memory location

d. Assembler

  • d. Assembler
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