You Are On Multi Choice Question Bank SET 971
48551. From the truth table for a three-input NOR gate, what is the only condition of inputs A, B, and C that will make the output X high?
48552. The logic gate that will have a LOW output when any one of its inputs is HIGH is the:
48553. The output of a NAND gate is LOW if ________.
48554. A truth table illustrates how the input level of a gate responds to all the possible output level combinations.
48555. A NOR gate output is LOW if any of its inputs is LOW.
48556. As a rule, CMOS has the lowest power consumption of all IC families.
48557. A popular waveform generator is the Johnson shift counter.
48558. Good troubleshooting is done by looking at the input signal and how it interacts with the circuits.
48559. A NOR gate and an OR gate operate in exactly the same way.
48560. An OR array is programmed by blowing fuses to eliminate selected variables from the output functions.
48561. A NAND gate output is LOW only if all the inputs are HIGH.
48562. An AND gate output is LOW if all the inputs are HIGH.
48563. Power is connected to pins 7 and 14 of a 7408 quad two-input AND gate IC to allow voltage for all four AND gates on the IC.
48564. An exclusive-NOR gate output is HIGH when the inputs are unequal.
48565. An OR gate output is HIGH only if all the inputs are HIGH.
48566. A waveform can be enabled or disabled by both AND and OR gates.
48567. An exclusive-OR gate output is HIGH when the inputs are unequal.
48568. In a Boolean equation the use of the + symbol represents the OR function.
48569. A logic gate has one or more output terminals and one input terminal.
48570. A logic pulser is used to determine the level of floating in a circuit.
48571. An inverter output is the complement of its input.
48572. It is important to memorize logic symbols, Boolean equations, and truth tables for logic gates.
48573. The gates in this figure are implemented using TTL logic. If the input of the inverter is open, and you apply logic pulses to point B, the output of the AND gate will be ________.
48574. The gates in this figure are implemented using TTL logic. If the output of the inverter is open, and you apply logic pulses to point B, the output of the AND gate will be ________.
48575. If A is LOW or B is LOW or BOTH are LOW, then X is LOW. If A is HIGH and B is HIGH, then X is HIGH. These rules specify the operation of a(n) ________.
48576. A major advantage of ECL logic over TTL and CMOS is ________.
48577. The output of an XOR gate is HIGH only when ________.
48578. A 2-input gate that can be used to pass a digital waveform unchanged at certain times and inverted at other times is a(n) ________.
48579. The gates in this figure are implemented using TTL logic. If the output of the inverter has an internal open circuit, what voltage would you expect to measure at the inverter's output?
48580. When does the output of a NAND gate = 1?
48581. The number of input combinations for a 4-input gate is ________.
48582. When does the output of a NOR gate = 0?
48583. The output of an AND gate with three inputs, A, B, and C, is HIGH when ________.
48584. If a 3-input NOR gate has eight input possibilities, how many of those possibilities will result in a HIGH output?
48585. If a signal passing through a gate is inhibited by sending a LOW into one of the inputs, and the output is HIGH, the gate is a(n):
48586. A device used to display one or more digital signals so that they can be compared to expected timing diagrams for the signals is a:
48587. When used with an IC, what does the term "QUAD" indicate?
48588. Which is/are the basic refresh mode(s) for dynamic RAM?
48589. For the given circuit, what memory location is being addressed?
48590. One of the most important specifications on magnetic media is the ________.
48591. A 64-bit word consists of ________.
48592. Which of the following RAM timing parameters determine its operating speed?
48593. The reason the data outputs of most ROM ICs are tristate outputs is to:
48594. Select the statement that best describes Read-Only Memory (ROM).
48595. How many 2K × 8 ROM chips would be required to build a 16K × 8 memory system?
48596. For the given circuit, which of the following is correct?
48597. What is the significance of the inverted triangles on the outputs of the device in the given figure?
48598. What is the maximum time required before a dynamic RAM must be refreshed?
48599. Which of the following best describes random-access memory (RAM)?
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48600. Why are ROMs called nonvolatile memory?
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