Any number with an exponent of zero is equal to:
|Answer» B. one|
In the decimal numbering system, what is the MSD?
|A.||the middle digit of a stream of numbers|
|B.||the digit to the right of the decimal point|
|C.||the last digit on the right|
|D.||the digit with the most weight|
|Answer» D. the digit with the most weight|
Which of the following statements does NOT describe an advantage of digital technology?
|A.||the values may vary over a continuous range.|
|B.||the circuits are less affected by noise.|
|C.||the operation can be programmed.|
|D.||information storage is easy.|
|Answer» A. the values may vary over a continuous range.|
The generic array logic (GAL) device is ________.
|C.||a cmos device|
|D.||reprogrammable and a cmos device|
|Answer» B. reprogrammable|
The range of voltages between VL(max) and VH(min) are ________.
|D.||between 2 v and 5 v|
|Answer» C. unacceptable|
What is a digital-to-analog converter?
|A.||it takes the digital information from an audio cd and converts it to a usable form.|
|B.||it allows the use of cheaper analog techniques, which are always simpler.|
|C.||it stores digital data on a hard drive.|
|D.||it converts direct current to alternating current.|
|Answer» A. it takes the digital information from an audio cd and converts it to a usable form.|
What are the symbols used to represent digits in the binary number system?
|C.||0 through 8|
|Answer» A. 0,1|
A full subtracter circuit requires ________.
|A.||two inputs and two outputs|
|B.||two inputs and three outputs|
|C.||three inputs and one output|
|D.||three inputs and two outputs|
|Answer» D. three inputs and two outputs|
The output of an AND gate is LOW ________.
|A.||all the time|
|B.||when any input is low|
|C.||when any input is high|
|D.||when all inputs are high|
|Answer» B. when any input is low|
Give the decimal value of binary 10010.
|Answer» C. 1810|
Parallel format means that:
|A.||each digital signal has its own conductor.|
|B.||several digital signals are sent on each conductor.|
|C.||both binary and hexadecimal can be used.|
|D.||no clock is needed.|
|Answer» A. each digital signal has its own conductor.|
A decoder converts ________.
|A.||noncoded information into coded form|
|B.||coded information into noncoded form|
|C.||highs to lows|
|D.||lows to highs|
|Answer» B. coded information into noncoded form|
A DAC changes ________.
|A.||an analog signal into digital data|
|B.||digital data into an analog signal|
|C.||digital data into an amplified signal|
|D.||none of the above|
|Answer» B. digital data into an analog signal|
The output of a NOT gate is HIGH when ________.
|A.||the input is low|
|B.||the input is high|
|C.||the input changes from low to high|
|D.||voltage is removed from the gate|
|Answer» A. the input is low|
The output of an OR gate is LOW when ________.
|A.||all inputs are low|
|B.||any input is low|
|C.||any input is high|
|D.||all inputs are high|
|Answer» A. all inputs are low|
Which of the following is not an analog device?
|B.||current flow in a circuit|
|Answer» C. light switch|
A demultiplexer has ________.
|A.||one data input and a number of selection inputs, and they have several outputs|
|B.||one input and one output|
|C.||several inputs and several outputs|
|D.||several inputs and one output|
|Answer» A. one data input and a number of selection inputs, and they have several outputs|
A flip-flop has ________.
|A.||one stable state|
|B.||no stable states|
|C.||two stable states|
|D.||none of the above|
|Answer» C. two stable states|
Digital signals transmitted on a single conductor (and a ground) must be transmitted in:
|Answer» D. serial.|
In a certain digital waveform, the period is four times the pulse width. The duty cycle is ________.
|Answer» B. 25%|
Select the statement that best describes the parity method of error detection:
|A.||parity checking is best suited for detecting double-bit errors that occur during the transmission of codes from one location to another.|
|B.||parity checking is not suitable for detecting single-bit errors in transmitted codes.|
|C.||parity checking is best suited for detecting single-bit errors in transmitted codes.|
|D.||parity checking is capable of detecting and correcting errors in transmitted codes.|
|Answer» C. parity checking is best suited for detecting single-bit errors in transmitted codes.|
A logic circuit that provides a HIGH output for both inputs HIGH or both inputs LOW is a(n):
|Answer» A. ex-nor gate|
A logic circuit that provides a HIGH output if one input or the other input, but not both, is HIGH, is a(n):
|Answer» C. ex-or gate|
Identify the type of gate below from the equation
|Answer» C. ex-or gate|
Parity systems are defined as either________ or ________ and will add an extra ________ tothe digital information being transmitted.
|A.||positive, negative, byte|
|B.||odd, even, bit|
|C.||upper, lower, digit|
|D.||on, off, decimal|
|Answer» B. odd, even, bit|
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