Digital Electronics MCQ Question with Answer

Digital Electronics MCQ with detailed explanation for interview, entrance and competitive exams. Explanation are given for understanding.

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Question No : 8
I/O mapped systems identify their input/output devices by giving them a(n) ________.

16-bit port number
8-bit port number
8-bit instruction
8-bit buffer number

Question No : 9
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
address bus
control bus
address decoder bus

Question No : 10
What type of circuit is used at the interface point of an input port?

tristate buffer
none of the above

Question No : 11
What kind of computer program is used to convert mnemonic code to machine code?


Question No : 12
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
instruction pointer
program counter

Question No : 13
Which of the following are the three basic sections of a microprocessor unit?

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

Question No : 14
Any number with an exponent of zero is equal to:

that number