Digital Logic Design MCQs | STS IBA FPSC BPSC SPSC PPSC Mcqs Test Preparation
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What is the function of a ‘MUX’ (Multiplexer)?
A. To select one of many input lines and forward it to a single output
B. To decode binary numbers
C. To store data
D. To perform logical operations
Answer: To select one of many input lines and forward it to a single output
What is an ‘ALU’ (Arithmetic Logic Unit)?
A. A component that performs arithmetic and logical operations
B. A type of memory storage
C. A signal amplifier
D. A digital-to-analog converter
Answer: A component that performs arithmetic and logical operations
What does a ‘D flip-flop’ do?
A. Captures the value of the input at the clock edge and holds it
B. Performs binary addition
C. Filters digital signals
D. Converts analog signals
Answer: Captures the value of the input at the clock edge and holds it
What does a ‘T flip-flop’ do?
A. Toggles between states with each clock pulse
B. Stores data permanently
C. Amplifies signal strength
D. Converts analog to digital signals
Answer: Toggles between states with each clock pulse
What is a ‘binary number’?
A. A number expressed in base-2 system using only 0s and 1s
B. A number in decimal system
C. A type of hexadecimal number
D. A system of physical units
Answer: A number expressed in base-2 system using only 0s and 1s
What is the role of ‘flip-flops’ in digital circuits?
A. To store binary data and control state transitions
B. To amplify signals
C. To convert digital signals to analog
D. To perform arithmetic operations
Answer: To store binary data and control state transitions
What does a ‘half adder’ do?
A. Adds two binary digits and produces a sum and a carry output
B. Subtracts binary digits and produces a difference and borrow
C. Stores data
D. Converts digital signals to analog
Answer: Adds two binary digits and produces a sum and a carry output
Which gate is known for performing the logical ‘not’ operation?
A. NOT gate
B. AND gate
C. OR gate
D. XOR gate
Answer: NOT gate
What is the purpose of an ‘SR latch’?
A. To store a single bit of data
B. To perform arithmetic operations
C. To filter digital signals
D. To convert analog signals to digital
Answer: To store a single bit of data