Q. In a binary counter, what is the maximum count for a 3-bit counter?
Solution
A 3-bit counter can represent values from 0 to 7, which is a total of 8 states.
Correct Answer:
A
— 7
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Q. In digital design, what does FPGA stand for?
-
A.
Field Programmable Gate Array
-
B.
Fast Programmable Gate Array
-
C.
Field Programmable General Array
-
D.
Fixed Programmable Gate Array
Solution
FPGA stands for Field Programmable Gate Array, which can be configured by the user after manufacturing.
Correct Answer:
A
— Field Programmable Gate Array
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Q. What is the function of a decoder in digital logic?
-
A.
To convert binary data to decimal
-
B.
To select a specific output line based on input
-
C.
To perform addition of binary numbers
-
D.
To store data temporarily
Solution
A decoder takes binary input and activates one specific output line corresponding to the input value.
Correct Answer:
B
— To select a specific output line based on input
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Q. What is the function of a multiplexer?
-
A.
To amplify signals
-
B.
To select one of many inputs and forward it to a single output
-
C.
To perform binary addition
-
D.
To store data temporarily
Solution
A multiplexer selects one of several input signals and forwards the selected input into a single line.
Correct Answer:
B
— To select one of many inputs and forward it to a single output
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Q. What is the output of a NOR gate when both inputs are true?
-
A.
True
-
B.
False
-
C.
Undefined
-
D.
High impedance
Solution
A NOR gate outputs false (0) when any of its inputs are true (1).
Correct Answer:
B
— False
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Q. What is the primary function of a decoder in digital circuits?
-
A.
To convert binary data to decimal
-
B.
To select one output line based on the binary input
-
C.
To perform arithmetic operations
-
D.
To store data
Solution
A decoder converts binary input into a unique output line, effectively selecting one of many outputs.
Correct Answer:
B
— To select one output line based on the binary input
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Q. What is the primary function of a flip-flop in digital design?
-
A.
To perform arithmetic operations
-
B.
To store binary data
-
C.
To generate clock signals
-
D.
To convert analog signals to digital
Solution
A flip-flop is a basic memory element in digital circuits that can store one bit of binary data.
Correct Answer:
B
— To store binary data
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Q. What is the primary purpose of a flip-flop in digital design?
-
A.
To perform arithmetic operations
-
B.
To store binary data
-
C.
To generate clock signals
-
D.
To convert analog signals to digital
Solution
A flip-flop is a basic memory element in digital circuits that can store one bit of binary data.
Correct Answer:
B
— To store binary data
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Q. What is the primary use of a shift register in digital design?
-
A.
To perform arithmetic operations
-
B.
To store and shift data
-
C.
To generate clock signals
-
D.
To amplify signals
Solution
A shift register is used to store data and shift it in or out serially, one bit at a time.
Correct Answer:
B
— To store and shift data
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Q. What is the purpose of a multiplexer in digital circuits?
-
A.
To amplify signals
-
B.
To select one of many inputs
-
C.
To store data
-
D.
To perform addition
Solution
A multiplexer selects one of many input signals and forwards the selected input into a single line.
Correct Answer:
B
— To select one of many inputs
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Q. Which of the following is a characteristic of a D flip-flop?
-
A.
It has two inputs: D and CLK
-
B.
It can only store one bit of data
-
C.
It changes state on the rising edge of the clock signal
-
D.
All of the above
Solution
A D flip-flop has a data input (D) and a clock input (CLK), can store one bit, and changes state on the clock's rising edge.
Correct Answer:
D
— All of the above
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Q. Which of the following is NOT a type of combinational logic circuit?
-
A.
Adder
-
B.
Multiplexer
-
C.
Flip-flop
-
D.
Decoder
Solution
A flip-flop is a sequential logic circuit, while the others are combinational logic circuits.
Correct Answer:
C
— Flip-flop
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