# Electronics - Combinational Logic Circuits

### Exercise :: Combinational Logic Circuits - Filling the Blanks

1.

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

Explanation:

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2.

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

Explanation:

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3.

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

Explanation:

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4.

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

Explanation:

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5.

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