Combinational Logic Circuits MCQs
Practice and Learn through MCQs and Quizzes. W3Definitions.com have 16 Combinational Logic Circuits MCQs
A basic multiplexer principle can be demonstrated through the use of a:
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A. single-pole relay
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B. DPDT switch
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C. rotary switch
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D. linear stepper
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Correct Answer: Option C
A circuit that responds to a specific set of signals to produce a related digital signal output is called a(n):
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A. BCD matrix
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B. display driver
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C. encoder
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D. decoder
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Correct Answer: Option C
A code in which each individual digit of a decimal number is represented by a 4-bit binary number is _________.
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A. binary coded decimal
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B. binary
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C. hexadecimal
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D. seven-segment code
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Correct Answer: Option A
A device that uses a binary decoder to direct a digital signal from a single source to one of several destinations is a ________.
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A. multiplexer
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B. demultiplexer
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C. encoder
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D. comparator
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Correct Answer: Option B
A multiplexed display:
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A. accepts data inputs from one line and passes this data to multiple output lines
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B. uses one display to present two or more pieces of information
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C. accepts data inputs from multiple lines and passes this data to multiple output lines
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D. accepts data inputs from several lines and multiplexes this input data to four BCD lines
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Correct Answer: Option B
A technique that can be used in multiple-digit numerical displays to control suppression or display of leading or trailing zeros in the display is called _________.
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A. advanced zero control
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B. time division multiplexing
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C. parity generation
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D. ripple blanking
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Correct Answer: Option D
How many inputs are required for a 1-of-10 BCD decoder?
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A. 4
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B. 8
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C. 10
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D. 1
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Correct Answer: Option A
In a BCD-to-seven-segment converter, why must a code converter be utilized?
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A. No conversion is necessary.
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B. to convert the 4-bit BCD into gray code
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C. to convert the 4-bit BCD into 10-bit code
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D. to convert the 4-bit BCD into 7-bit code
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Correct Answer: Option D
Most demultiplexers facilitate which of the following?
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A. decimal to hexadecimal
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B. single input, multiple outputs
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C. ac to dc
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D. odd parity to even parity
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Correct Answer: Option B
One application of a digital multiplexer is to facilitate:
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A. code conversion
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B. parity checking
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C. parallel-to-serial data conversion
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D. data generation
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Correct Answer: Option C
Parity systems are defined as either_____ or _____ and will add an extra _____ to the digital information being transmitted.
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A. positive, negative, byte
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B. odd, even, bit
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C. upper, lower, digit
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D. on, off, decimal
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Correct Answer: Option B
Select one of the following statements that best describes the parity method of error detection:
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A. Parity checking is best suited for detecting single-bit errors in transmitted codes.
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B. Parity checking is best suited for detecting double-bit errors that occur during the transmission of codes from one location to another.
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C. Parity checking is not suitable for detecting single-bit errors in transmitted codes.
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D. Parity checking is capable of detecting and correcting errors in transmitted codes.
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Correct Answer: Option A
The diodes in a seven-segment display where all cathodes are tied together and grounded are illuminated when a logic ____________________ is applied to the ____________________.
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A. LOW, anodes
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B. LOW, count down control line
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C. HIGH, anode
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D. HIGH, count up control line
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Correct Answer: Option C
When two or more inputs are active simultaneously, the process is called:
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A. first-in, first-out processing
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B. priority encoding
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C. ripple blanking
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D. priority decoding
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Correct Answer: Option B
Which digital system translates coded characters into a more intelligible form?
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A. encoder
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B. display
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C. counter
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D. decoder
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Correct Answer: Option D
Which type of decoder will select one of sixteen outputs, depending on the 4-bit binary input value?
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A. hexadecimal
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B. dual octal outputs
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C. binary-to-hexadecimal
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D. hexadecimal-to-binary
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Correct Answer: Option A