Computer Knowledge
Digital Logic and Microprocessors
749 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
-
Can be odd and even
-
Can only be odd
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Can only be even
-
Can be odd or even
D
Correct answer
Explanation
Parity systems can be configured to use either even parity or odd parity depending on the implementation requirements.
Find the minimal sum-of-products form of the following Boolean expression: (A ∨ B) ∧ (¬A ∨ C) ∧ (B ∨ ¬C)
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A ∨ B ∨ C
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A ∨ C
-
B ∨ C
-
A ∨ B
B
Correct answer
Explanation
Using Boolean algebra, we can simplify the expression as follows: (A ∨ B) ∧ (¬A ∨ C) ∧ (B ∨ ¬C) = (A ∨ B ∨ C) ∧ (¬A ∨ C) = (A ∨ C) ∧ (¬A ∨ C) = A ∨ C
Find the minimal sum-of-products form of the following Boolean expression: (A ∨ B) ∧ (¬A ∨ C) ∧ (B ∨ ¬C)
-
A ∨ B ∨ C
-
A ∨ C
-
B ∨ C
-
A ∨ B
B
Correct answer
Explanation
Using Boolean algebra, we can simplify the expression as follows: (A ∨ B) ∧ (¬A ∨ C) ∧ (B ∨ ¬C) = (A ∨ B ∨ C) ∧ (¬A ∨ C) = (A ∨ C) ∧ (¬A ∨ C) = A ∨ C
What is the identity element for the operation of ∨ in Boolean algebra?
A
Correct answer
Explanation
The identity element for the operation of ∨ is the element that, when combined with any other element, leaves that element unchanged.
In digital signal processing, what is the role of zero in binary representation?
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It represents the 'off' state in a binary digit.
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It indicates the absence of a signal.
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It serves as a placeholder for unused bits.
-
All of the above.
D
Correct answer
Explanation
In digital signal processing, zero plays a crucial role in binary representation. It represents the 'off' state in a binary digit, indicates the absence of a signal, and serves as a placeholder for unused bits.
Which of the following is an example of a zero-crossing detector in circuit analysis?
-
Comparator
-
Operational amplifier
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Diode
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Transistor
A
Correct answer
Explanation
A comparator is commonly used as a zero-crossing detector in circuit analysis. It compares two input signals and generates an output when the difference between them crosses zero.
Which Indian organization is responsible for developing India's first indigenous microprocessor, Shakti?
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Indian Institute of Technology, Bombay (IIT Bombay)
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Indian Institute of Technology, Kanpur (IIT Kanpur)
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Indian Institute of Technology, Delhi (IIT Delhi)
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Indian Institute of Technology, Madras (IIT Madras)
A
Correct answer
Explanation
Indian Institute of Technology, Bombay (IIT Bombay) developed India's first indigenous microprocessor, Shakti, in 2016.
What is the Boolean expression for the following circuit?
+-------+
| |
A ->| AND | -> Z
| |
+-------+
|/
V
+-------+
| |
B ->| OR | -> Z
| |
+-------+
-
Z = (A ∧ B)
-
Z = (A ∨ B)
-
Z = (A ⊕ B)
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Z = (A NAND B)
B
Correct answer
Explanation
The circuit has two inputs, A and B, and one output, Z. The AND gate takes two inputs and outputs a 1 if both inputs are 1, and a 0 otherwise. The OR gate takes two inputs and outputs a 1 if either input is 1, and a 0 otherwise. Therefore, the Boolean expression for the circuit is Z = (A ∨ B).
What is the truth table for the logical operator NAND?
-
| p |
q |
NAND(p, q) |
| T |
T |
F |
| T |
F |
T |
| F |
T |
T |
| F |
F |
T |
-
| p |
q |
NAND(p, q) |
| T |
T |
T |
| T |
F |
F |
| F |
T |
F |
| F |
F |
T |
-
| p |
q |
NAND(p, q) |
| T |
T |
F |
| T |
F |
F |
| F |
T |
F |
| F |
F |
T |
-
| p |
q |
NAND(p, q) |
| T |
T |
T |
| T |
F |
T |
| F |
T |
T |
| F |
F |
F |
A
Correct answer
Explanation
The truth table for the logical operator NAND is as follows:
| p |
q |
NAND(p, q) |
| T |
T |
F |
| T |
F |
T |
| F |
T |
T |
| F |
F |
T |
The NAND operator is defined as the negation of the AND operator. Therefore, the truth value of NAND(p, q) is true if and only if both p and q are false.
Which of the following is a circuit in the graph below?
A -- B -- C -- D -- E
F -- G -- H
-
A-B-C-D-E-A
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F-G-H-F
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A-B-C-D-E-F-G-H-A
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B-C-D-E-F-G-H-B
A
Correct answer
Explanation
A circuit is a path where the last vertex is connected to the first vertex, and in this case, the circuit A-B-C-D-E-A is a valid circuit.
Which of the following is a type of digital logic gate?
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AND gate
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OR gate
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NOT gate
-
All of the above
D
Correct answer
Explanation
AND gate, OR gate, and NOT gate are all types of digital logic gates.
Which of the following is a basic building block of digital circuits?
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Transistor
-
Resistor
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Capacitor
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Inductor
A
Correct answer
Explanation
Transistors are the fundamental building blocks of digital circuits due to their ability to amplify or switch electronic signals.
What is the primary function of a logic gate?
-
Amplification
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Signal Conditioning
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Data Storage
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Logical Operations
D
Correct answer
Explanation
Logic gates perform logical operations on input signals to produce a desired output, forming the basis of digital computation.
Which logic gate is known as the universal gate?
-
AND Gate
-
OR Gate
-
NOT Gate
-
NAND Gate
D
Correct answer
Explanation
The NAND gate is considered the universal gate because it can be used to implement any other logic gate by combining multiple NAND gates.
What is the difference between combinational and sequential logic circuits?
-
Combinational circuits have memory, sequential circuits do not.
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Combinational circuits have feedback, sequential circuits do not.
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Combinational circuits depend on past inputs, sequential circuits do not.
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Combinational circuits are simpler, sequential circuits are more complex.
C
Correct answer
Explanation
Combinational logic circuits produce an output based solely on the current inputs, while sequential logic circuits have memory elements that store past inputs and affect the current output.