NAVEDTRA 14185A, NEETS Mod. 13, Ch. 3

Question 1

Which gate is a modified OR gate that produces a HIGH output when only one of the inputs is HIGH?

Answer 1

Exclusive OR (XOR)

Question 2

What are combinations of logic gates that combine binary values to obtain a sum?

Answer 2

Adders

Question 3

Which circuit can add two binary digits but will not produce a carry?

Answer 3

Quarter adder

Question 4

What is designed to combine two binary digits and produce a carry?

Answer 4

Half adder

Question 5

Subtraction is accomplished in computers by the R’s complement and what other method?

Answer 5

ADD

Question 6

What may be used to store data temporarily, to multiply or divide, to count operations, or to receive and transfer information?

Answer 6

Flip-flops

Question 7

Which type of bistable device changes state on command from a common input terminal?

Answer 7

Toggle

Question 8

What is the most widely used FF because of its versatility?

Answer 8

J-K FF

Question 9

What is a timing signal generated by the equipment to control operations?

Answer 9

Clock

Question 10

The frequency stability of the astable multivibrator can be increased by applying what to the circuit?

Answer 10

Trigger pulse

Question 11

What allow functions involving more than one operation to be completed during a single clock cycle?

Answer 11

Multiphase clocks

Question 12

What do most modern high-speed equipment use as the basis for their timing networks?

Answer 12

Crystal-controlled oscillators

Question 13

What is the total number of counts or stable states a counter can indicate called?

Answer 13

Modulus

Question 14

Which term is used to describe the count capability of counters?

Answer 14

Modulo

Question 15

Which term means that the events (setting and resetting of FFs) occur one after the other rather than all at once?

Answer 15

Asynchronous

Question 16

High-frequency operations require that all the FFs of a counter be triggered at the same time to prevent errors. Which type of counter is used for this type of operation?

Answer 16

Synchronous

Question 17

What is defined as a loop of bistable devices (flip-flops) interconnected in such a manner that only one of the devices may be in a specified state at one time?

Answer 17

Ring counter

Question 18

Which type of temporary storage device is used to store data, memory addresses, and operation codes?

Answer 18

Register

Question 19

Which type of register can the contents be shifted one or more places to the left or right?

Answer 19

Shift register

Question 20

Which term means that the data is moved along a single line one bit at a time?

Answer 20

Serial transfer

Question 21

Which term means that each bit of data is moved on its own line and that all bits transfer simultaneously?

Answer 21

Parallel transfer

Question 22

Which term means to change the magnitude of a number?

Answer 22

Scaling

Question 23

What are groups of logic circuits that are based on particular types of elements (resistors, transistors, and so forth)?

Answer 23

Logic families

Question 24

What is the feature known as when the output of one logic circuit can be used as the input to another logic circuit?

Answer 24

Compatibility