Q.1

LDA addr and STA addr are Fortran language instructions stored in an external memory IC for a microprocessor.

  • True
  • False
Q.2

Programs written for the 8080A must have slight modifications to run on the 8085A.

  • True
  • False
Q.3

The software used to drive microprocessor-based systems is called:

  • assembly language
  • firmware
  • machine language code
  • BASIC interpreter instructions
Q.4

When referring to instruction words, a mnemonic is:

  • a short abbreviation for the operand address
  • a short abbreviation for the operation to be performed
  • a short abbreviation for the data word stored at the operand address
  • shorthand for machine language
Q.5

The technique of assigning a memory address to each I/O device in the computer system is called:

  • memory-mapped I/O
  • ported I/O
  • dedicated I/O
  • wired I/O
Q.6

A register in the microprocessor that keeps track of the answer or results of any arithmetic or logic operation is the:

  • stack pointer
  • program counter
  • instruction pointer
  • accumulator
Q.7

Which of the following buses is primarily used to carry signals that direct other ICs to find out what type of operation is being performed?

  • data bus
  • control bus
  • address bus
  • address decoder bus
Q.8

I/O mapped systems identify their input/output devices by giving them a(n) ________.

  • 8-bit port number
  • 16-bit port number
  • 8-bit buffer number
  • 8-bit instruction
Q.9

The circuits in the 8085A that provide the arithmetic and logic functions are called the:

  • CPU
  • ALU
  • I/O
  • none of the above
Q.10

What kind of computer program is used to convert mnemonic code to machine code?

  • debug
  • assembler
  • C++
  • Fortran
Q.11

What type of circuit is used at the interface point of an input port?

  • decoder
  • latch
  • tristate buffer
  • none of the above
Q.12

How many buses are connected as part of the 8085A microprocessor?

  • 2
  • 3
  • 5
  • 8
Q.13

The ________ ensures that only one IC is active at a time to avoid a bus conflict caused by two ICs writing different data to the same bus.

  • control bus
  • control instructions
  • address decoder
  • CPU
Q.14

Which of the following are the three basic sections of a microprocessor unit?

  • operand, register, and arithmetic/logic unit (ALU)
  • control and timing, register, and arithmetic/logic unit (ALU)
  • control and timing, register, and memory
  • arithmetic/logic unit (ALU), memory, and input/output
Q.15

The register in the 8085A that is used to keep track of the memory address of the next op-code to be run in the program is the:

  • stack pointer
  • program counter
  • instruction pointer
  • accumulator
0 h : 0 m : 1 s