Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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A parallel-in, serial-out shift
register is loaded initially with 1100. What will the register contain after two clock pulses if the
serial input is LOW?
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2.
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A parallel-in, serial-out shift
register is loaded initially with 1010. What will the register contain after two clock pulses if the
serial input is LOW?
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3.
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A parallel-in, serial out shift
register is loaded initially with 1010. What will the register contain after three clock pulses if
the serial input is LOW?
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4.
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Which abbreviation describes
the shift register used for serial-to-parallel conversion?
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5.
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Which abbreviation describes a
shift register that has no parallel inputs or outputs?
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6.
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What is the modulus of a 4-bit
Johnson counter?
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7.
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An important application of a
Johnson counter is
a. | easy decoding of timing
pulses. | c. | counting in
binary. | b. | frequency division. | d. | counting in decimal. |
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8.
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How many data inputs and
outputs does an 8-bit SIPO shift register have?
a. | one input, eight
outputs | c. | eight inputs, one
output | b. | four inputs, four outputs | d. | eight inputs, eight outputs |
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9.
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How many data inputs and
outputs does an 8-bit PISO shift register have?
a. | four inputs, four
outputs | c. | eight inputs,
eight outputs | b. | eight inputs, one output | d. | one input, eight outputs |
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10.
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What function is performed by a
74194 Universal Shift Register if the select inputs are S1 = 0 and S0 = 1?
a. | shift
right | c. | parallel
load | b. | shift left | d. | hold |
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11.
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What function is performed by a
74194 Universal Shift Register if the select inputs are S1 = 1 and S0 = 1?
a. | shift
right | c. | shift
left | b. | hold | d. | parallel
load |
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12.
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In a microprocessor system,
what does the term "data bus" mean?
a. | any connection between two
ICs | b. | a parallel set of conductors that is shared by several
devices | c. | any two-way data path | d. | any parallel connection between registers that consists of
eight or more lines |
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