Computer Knowledge
Digital Logic and Microprocessors
735 Questions
Digital logic and microprocessors form the core of computer science, covering logic gates, combinational and sequential circuits, and CPU architecture. These topics are crucial for computer knowledge sections in technical exams. Test your digital electronics basics here.
Logic gates and circuitsCombinational vs sequential circuitsMicroprocessor instructionsTruth tables and boolean functions
Digital Logic and Microprocessors Questions
B
Correct answer
Explanation
The NOR gate is a combination OR gate followed by an inverter. Its output is true, if both inputs are false. Otherwise, the output is false.
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EXOR gate
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AND gate
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OR gate
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NOR gate
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NOT gate
C
Correct answer
Explanation
The OR gate is an electronic circuit that gives a high output (1) if one or more of its inputs are high. A plus (+) is used to show the OR operation.
C
Correct answer
Explanation
A B C 0 0 0 0 0 10 1 0 0 1 1 1 0 01 0 1 1 1 01 1 1 There are " 8" possible input combinations or 23
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A = 1, B = 1, C = 0
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A = 1, B = 0, C = 1
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A = 0, B = 0, C = 0
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A = 0, B = 0, C = 1
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A = 1, B = 1, C = 1
E
Correct answer
Explanation
Output of an AND gate is high when all inputs are high
a = 1, b = 1, c = 1. Output of AND gate is = A*B*C = 1*1*1 = 1.
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X = AB
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X = ABC
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X = A + B + C
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X = A + B
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X = A + B + C + D
B
Correct answer
Explanation
As per the question 3 inputs so the inputs be A, B and C then according to AND gate, it is defines the product. So, for this three inputs it is X = ABC.
B
Correct answer
Explanation
NAND and NOR are universal gates. Any function can be implemented using only NAND or only NOR gates.
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NAND gate
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OR gate by an inverter
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AND gate
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NOR gate
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NOT gate
B
Correct answer
Explanation
OR gate is typically implemented as a NOR gate followed by an inverter.
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A = 0, B = 0, C = 0
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A = 1, B = 0, C = 1
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A = 0, B = 0, C = 1
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A = 1, B = 0, C = 0
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A = 1, B = 1, C = 1
A
Correct answer
Explanation
If A = 0, B = 0, C = 0 then A*B*C = 0*0*0 = 0 (since OR gate performs addition).
A
Correct answer
Explanation
Coincidence circuits in computers operate when the input signals coincide precisely, i.e. overlap completely. In such devices, coincidence circuits perform the functions of AND logic elements.
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A = 1 and B = 0
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A = 0 and B = 0
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A = 1 and B = 1
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Both 2 and 3
D
Correct answer
Explanation
Yes, the output of EX-NOR gate is 1 when both the options 3 and 4 follow.
Yes, the output of EX-NOR gate is 1 when both the options 3 and 4 follow.
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NAND gate
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Multiplexer
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Encoder
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Binary counter
D
Correct answer
Explanation
This is not a combinational circuit because its output depends on the previous output.
This is not a combinational circuit because its output depends on the previous output.
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both the expressions must be true for the entire expression to be true
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at least one of the expressions must be true for the entire expression to be true
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neither expression should be true for the entire expression to be true
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the program stops executing
A
Correct answer
Explanation
The AND gate outputs true only when all input expressions are true. If any input is false, the output is false.
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analog
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digital
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hybrid
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combined
B
Correct answer
Explanation
Boolean algebra is the mathematical foundation for digital electronics, used to analyze and design digital circuits that operate with binary values (0 and 1).
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table
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truth table
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false table
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combinational circuits
B
Correct answer
Explanation
Truth tables provide a systematic method to verify all Boolean laws by exhaustively listing every possible input combination and the corresponding output, allowing us to prove identities like AND, OR, and complement properties.
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Bit
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Byte
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Logic gate
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Flip-flop
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RAM
C
Correct answer
Explanation
A logic gate is an idealized or physical device implementing a Boolean function, that is, it performs a logical operation on one or more logical inputs, and produces a single logical output. It is the basic unit of any digital circuit.