Exercise: Combinational Logic Circuits

Questions for: Combinational Logic Circuits

The diodes in a seven-segment display where all cathodes are tied together and grounded are illuminated when a logic ____________________ is applied to the ____________________.
A:
LOW, anodes
B:
LOW, count down control line
C:
HIGH, anode
D:
HIGH, count up control line
Answer: C
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A code in which each individual digit of a decimal number is represented by a 4-bit binary number is _________.
A:
binary coded decimal
B:
binary
C:
hexadecimal
D:
seven-segment code
Answer: A
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A device that uses a binary decoder to direct a digital signal from a single source to one of several destinations is a ________.
A:
multiplexer
B:
demultiplexer
C:
encoder
D:
comparator
Answer: B
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Parity systems are defined as either_____ or _____ and will add an extra _____ to the digital information being transmitted.
A:
positive, negative, byte
B:
odd, even, bit
C:
upper, lower, digit
D:
on, off, decimal
Answer: B
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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 _________.
A:
advanced zero control
B:
time division multiplexing
C:
parity generation
D:
ripple blanking
Answer: D
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