Electrical Online Test 5

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Attempt Free Electrical Online Test 5 Here. Read The Important Electrical MCQ From Below.

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

a. memory-mapped I/O
b. Ported I/O
c. Dedicated I/O
d. Wired I/O
Ans. a. memory-mapped I/O

2) The items that you can physically touch in a computer system are called:

a. Software
b. firmware
c. Hardware
d. none of the above
Ans. c. Hardware

3) When was the first 8-bit microprocessor introduced?

a. 1969
b. 1974
c. 1979
d. 1985
Ans. b.1974

4) 8086 microprocessor is interfaced to 8253 programmable Interval Timer, the maximum number by which the clk frequency on one of the timer is divided by

a. 2 16
b. 2 8
c. 2 10
d. 2 20
Ans. a.2 16

Electrical Online Test 5

5) 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:

a. Stack pointer
b. program counter
c. instruction pointer
d. accumlator
Ans. b. program counter

6) 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?

a. data bus
b. control bus
c. address bus
d. Address decoder bus
Ans. b. control bus

7) Because microprocessor CPUs do not understand mnemonics as they are,the have to be converted to——

a. hexadecimal machine code
b. binary machine code
c. assembly language
d. all of the above
Ans. b. binary machine code

8) Single-bit indicators that may be set or cleared to show the results of logical or arithmetic operations are the:

a. flags
b. registers
c. Monitors
d. Decisions
Ans. a. flags

9) What type of circuit is used at the interface point of an output port?

a. decoder
b. latch
c. Tristate buffer
d. None of the above
Ans. b. latch

Electrical Online Test 5

10) 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.

a. control bus
b. Control instructions
c. address decoder
d. CPU
Ans. c. address decoder

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

a. operand, register, and arithmetic/logic unit (ALU)
b. Control and timing, register, and arithmetic/logic unit (ALU)
c. control and timing, register, and memory
d. Arithmetic/logic unit (ALU), memory, and input/output
Ans. b. Control and timing, register, and arithmetic/logic unit (ALU)

12) Which bus is a bidirectional bus?

a. Address bus
b. data bus
c. address bus and data bus
d. None of the above
Ans. b. data bus

13) How many bits are used in the data bus?

a. 16
b. 8
c. 32
d. 64
Ans. b.8

Electrical Online Test 5

14) What is the difference between a mnemonic code and machine code?

a. There is no difference
b. Machine codes are in binary, mnemonic codes are in shorthand English
c. Machine codes are in shorthand English, mnemonics codes are in binary
d. All of the above
Ans. b. Machine codes are in binary, mnemonic codes are in shorthand English

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

a. CPU
b. ALU
c. I/O
d. None of the above
Ans. a. CPU

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

a. decoder
b. latch
c. tristate buffer
d. None of the above
Ans. c. tristate buffer

17) Which interrupt has highest priority

a. INTR
b. TRAP
c. RST 7.5
d. RST 6.5
Ans. b. TRAP

Electrical Online Test 5

18) When referring to instruction words, a mnemonic is:

a. a short abbreviation for the operand address
b. A short abbreviation for the operation to be performed
c. A short abbreviation for the data word stored at the operand address
d. Shorthand for machine language
Ans. b. A short abbreviation for the operation to be performed

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

a. debug
b. assembler
c. C++
d. FORTRAN
Ans. d. FORTRAN

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

a. Assembly language
b. firmware
c. Machine language code
d. BASIC interpreter instructions
Ans. a. Assembly language

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

a. 8-bit port number
b. 16-bit port number
c. 8-bit buffer number
d. 8-bit instruction
Ans. a.8-bit port number

Electrical Online Test 5

22) The devices that provide the means for a computer to communicate with the user or other computers are referred to as:

a. CPU
b. ALU
c. I/O
d. none of the above
Ans. c. I/O

23) The 8085A is a(n):

a. 16-bit parallel CPU
b. 8-bit serial CPU
c. 8-bit parallel CPU
d. none of the above
Ans. c.8-bit parallel CPU

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