Digital Flashcards
(91 cards)
1
Q
Convert 11001001 (binary) to decimal. A. 201 B. 2001 C. 20 D. 210
A
A
2
Q
Convert the following binary number to decimal; 01011 A. 11 B. 35 C. 14 D. 10
A
A
3
Q
Convert the following binary to decimal: 10011010 A. 154 B. 155 C. 153 D.157
A
A
4
Q
Digital electronics is based on the_ numbering system. A. Decimal B. Octal C. Binary D. Hexidecimal
A
C
5
Q
Convert 1731(base 8) to binary A.216.4 B. 985 C. 3D9 D. 1123
A
B
6
Q
Convert 527 (base 8) to binary A.011100111 B. 101010111 C. 343 D.111010101
A
B
7
Q
Hexadecimal letters A through F are used for decimal equivalent values between: A. 1 through 6 B. 9 through 14 C. 10 through 15 D. 11 through 17
A
C
8
Q
Convert the following binary number to octal: 001101011 A. 153(8) B.351(8) C.253(8) D. 352(8)
A
A
9
Q
Convert the following binary number to octal: 010111100(2) A. 172(8) B. 272(8) C. 174 (8) D.274(8)
A
D
10
Q
Convert the following octal number to decimal: 17(8) A. 51 B. 17 C. 92 D.15
A
D
11
Q
Convert the following octal number to decimal: 35(8) A. 71 B. 17 C. 92 D.29
A
D
12
Q
Convert the following octal number to binary: 76(8) A.110111 B. 111110 C. 111100 D.100111
A
B
13
Q
Convert the following octal number to binary: 104(8) A.001000100 B.100000001 C. 0010100 D. 1000001
A
A
14
Q
Convert the following decimal number to octal: 281 A. 134(8) B. 431(8) C.331(8) D. 133(8)
A
B
15
Q
Convert the following decimal number to octal:39 A. 63(8) B. 36(8) C.47(8) D.74(8)
A
C
16
Q
One hex digit is sometimes referred to as an: A. Byte B. Nibble C. Grouping D. Instruction
A
B
17
Q
Convert the binary number 1011010 to hexadecimal. A. 5B B. 5F C. 5A D. 5C
A
C
18
Q
What is the decimal value of the hexadecimal number 777 A. 191 B. 1911 C. 19 D. 19111
A
B
19
Q
What is the result when a decimal 5238 is converted to base 16? A.327.375 B. 12166 C. 1388 D. 1476
A
D
20
Q
Convert the following decimal number to hexadecimal: 125 A. 7D B.D7 C. 4A D. 1476
A
A
21
Q
Convert the following decimal number to hexadecimal: 74 A. A4 B. B4 C. 7C D. C7
A
C
22
Q
Convert the following hexadecimal number to decimal:B5 A. 212 B. 197 C. 165 D. 181
A
D
23
Q
Convert the following hexadecimal number to decimal: 1CF(16) A. 463 B. 4033 C. 479 D. 181
A
A
24
Q
Convert the following hexadecimal number to binary: C9(16) A. 10111001 B. 10111011 C. 10011100 D. 11001001
A
D
25
```
Convert the following hexadecimal number to binary: 14B(16)
A. 101101000001
B. 000101001011
C. 000101001101
D. 110101000001
```
B
26
```
3428 is the decimal value for which of the following BCD groupings?
A. 11010001001000
B. 11010000101000
C. 011010010000010
D. 110100001101010
```
B
27
```
The BCD system can be used to represent each of the 10 decimal digits as an:
A. 4-bit binary code
B. 8-bit binary code
C. 16-bit binary code
D. ADCII code
```
A
28
```
Convert the following decimal number to 8-bit binary: 35
A. 00010010
B. 0001001
C. 00100011
D. 00100010
```
C
29
```
Convert the following decimal number to 8-bit binary:187
A.10111011
B. 11011101
C. 10111101
D. 10111100
```
A
30
```
Convert the following BCD number to decimal: 010101101001
A. 539
B. 2551
C. 569
D. 1552
```
C
31
```
An informational signal tht makes use of binary digits is considered:
A. Solid state
B. Digital
C. Analog
D. Non-oscillating
```
B
32
```
An analog signal has a range from 0v to 5v. What is the total number of analog possibilities within this range?
A. 5
B. 50
C. 250
D.Infinite
```
D
33
```
A binary's number value changes most drastically when the _ is changed.
A. MSB
B. Frequency
C. LSB
D. Duty Cycle
```
A
34
```
Convert the following BCD number to decimal: 100000000011
A. 8003
B. 803
C. 1003
D. 103
```
B
35
```
Convert the following decimal number to BCD: 127
A.011100100001
B. 111010001
C. 001010111
D. 000100100111
```
D
36
```
Which of the following is not a basic Boolean operation?
A. OR
B. NOT
C. AND
D. FOR
```
D
37
```
Output will be a LOW for any case when one or more inputs are zero for an:
A. OR
B. NOT
C. AND
D. NOR
```
C
38
```
How many truth tables entries for a four-input circuit?
A. 4
B. 8
C. 12
D. 16
```
C
39
```
The format used to represent the logic output for the various combinations of logic inputs to a gate is called an:
A. Boolean Constant
B. Boolean Variable
C. Truth Table
D. Input Logic Function
```
C
40
How many input combinations would a truth table have for a six-input AND gate?
A. 32
B. 48
C. 64
D. 128
C
41
```
How many inputs for a four-input AND gate must be high in order for the ouptu of the logic gate to go high?
A. Anyone of the inputs
B. Anyone two of the inputs
C. Any three of the inputs
D. All four inputs
```
D
42
```
If the ouptu of a three -input AND gate must be low, what must the condition of the inputs be?
A. All inputs must be low
B. All inputs must be high
C. At least on input must be low.
D. At least one input must be high
```
C
43
```
The logic gate that will have HIGH or 1 at its output when any one of its inputs is HIGH is an:
A.OR
B.AND
C.NOR
D.NOT
```
A
44
```
Which of the following logical operations is represented by the + sign in Boolean Algebra?
A. Inversion
B. AND
C. OR
D. Complemention
```
C
45
```
Which of the following equations would accurately describe a four-input OR gate when A=1 B=1 C=0 and D=0
A. 1+1+0+0=01
B. 1+1+0+0=1
C. 1+1+0+0=0
D. 1+1=0+0=00
```
B
46
```
How many AND gates are found in a 7411 IC chip?
A. 1
B. 2
C. 3
D. 4
```
C
47
```
How many inputs are on the logic gates of a 74HC21 chip?
A. 1
B. 2
C. 3
D.4
```
D
48
```
What are the pin numbers of the outputs of the gates in a 7432 chip?
A. 3,6,10 and 13
B. 1,4,10 and 13
C. 3,6, 8 and 11
D. 1,4,8 and 11
```
C
49
```
The basic logic gate whose output is the compliment of the input is the:
A. OR
B. AND
C. Inverter
D. Comparator
```
C
50
```
What does the small bubble on the output of the NAND gate logic symbol mena?
A. Open collector output
B. Tristate
C. Output is inverted
D. None of the above
```
C
51
```
How many entries would a truth table for a four-input NAND gate have?
A. 2
B. 4
C. 16
D. 32
```
D
52
```
When reading a Boolean expression what does the word NOT indicate?
A. the same as
B. Equal to
C. HIGH
D. LOW
```
B
53
```
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 an:
A. AND
B. NAND
C. NOR
D. OR
```
C
54
A NAND gate has;
A. An active-LOW inputs and an active-Low output
B. An active-HIGH inputs and an active-LOW output
C. An active-LOW inputs and an active-HIGH output
D. An active-HIGH inputs and an active-HIGH output
B
55
Logically, the output for a NOR gate would have the same Boolean expression as an:
A. NAND gate immediately followed by an inverter
B. OR gate immediately followed by an inverter.
C. AND gate immediately followed by an inverter
D. NOR gate immediately followed by an inverter.
C
56
```
The logic gate that will have a LOW output when any one of its inputs is HIGH is the:
A. NAND
B. AND
C. NOR
D. OR
```
A
57
```
The NOR logic gate is the same as the operation of the _ gate with an inverter connected to the output.
A. OR
B. AND
C. NAND
D. None of the above
```
B
58
```
The term hex inverter refers to:
A. An inverter that has six inputs
B. Six inverters in a single package
C. A six-input symbolic log device
D. An inverter that has a history of failure
```
B
59
```
When used with an IC, what does the term QUAD indicate
A. 2 circuits
B. 4 circuits
C. 6 circuits
D. 8 circuits
```
B
60
```
Adding in binary, a decimal 26 + 27 will produce sum of :
A.111010
B. 110110
C. 110101
D. 101011
```
C
61
```
Determine the two's-compliment of each hinary number. 00110 00011 11101
A. 11001 11100 00010
B. 00111 00010 00010
C. 00110 00011 11101
D. 11010 11101 00011
```
D
62
```
Covert each of the signed decimal numbers to an 8-bit signed binary number ( two compliment) +7, -3, -12
A. 0000 0111 11111101 11110100
B. 1000 0111 0111 1101 01110100
C. 0000 0111 0000 0011 000 1100
D. 0000 0111 1000 0011 1000 1100
```
A
63
```
Convert each of the following signed binary numbers (two's compliment) to a signed decimal number.
00000101 11111100 11111000
A. -5 +4 +8
B. +5 -4 -8
C. +5 +252
D. -5 -252 -248
```
B
64
```
Convert each of the signed decimal number to two's compliment for and perform the addition to binary.
+13-7 -10+15
A.0001 0100 0000 0101
B. 0000 0110 0001 1001
C.0000 0110 0000 0101
D. 1111 0110 1111 0101
```
C
65
```
Perform subtraction on each of the following two's compliment form and perform the addition to binary.
01001+00011 01100+00111
A. 01100 10011
B. 00110 00101
C. 10110 10101
D. 00111 00100
```
B
66
```
Binary subtraction of a decimal 12 from 43 will utilize which two's compliment (convert 15 to a negative number)
A. 101011
B. 110000
C. 011100
D. 110001
```
D
67
```
An 8-bit register may provide storage for two's compliment codes within which decimal range?
A. +128 to -128
B. -128 to +127
C. +128 to -127
D. +127 to -127
```
A
68
```
The decimal value E (base 16) is:
A. 12
B. 13
C. 14
D. 15
```
C
69
```
Add the following hex numbers: 00100(base 16) + 10010(base 16)
A. 10120(base 16)
B. 10020(base 16)
C. 11120(base 16)
D. 00120(base 16)
```
A
70
```
Perform the following hex subtraction: ACE(base 16)-999(base 16)
A. 236 (base 16)
B. 135 (base 16)
C. 035 (base 16)
D. 335 (base 16)
```
B
71
```
Convert the decimal numbers 235 and 965 to BCD and add them together. Select the BCD code groups that reflect the final answer.
A. 1101 1110 1010
B.1110 1010 1110
C. 0001 0010 0100 0000
D. 0010 0011 0100 0000
```
C
72
```
Add the following BCD numbers.
0110+0101 0111+1000 1001+1000
A. 0000 1011 0000 1111 0001 0001
B. 0001 0001 0001 0101 0001 0001
C. 0000 1011 0000 1111 0001 0111
D. 0001 0001 0001 0101 0001 0111
```
D
73
```
What are two types of basic adder circuits?
A. Sum and carry
B. half-adder and full adder
C. Asynchronous and synchronous
D. One and two's compliment
```
B
74
```
The summing outputs of a half-adder or full-adder are designated by which Greek symbol?
A. Omega
B. Theta
C. Lamda
D. Sigma
```
D
75
```
How may inputs must a full-adder have?
A. 2
B .3
C. 4
D. 5
```
B
76
```
The binary adder circuit is designed to add _ binary numbers at the same time.
A. 2
B. 4
C. 6
D. 8
```
A
77
```
A full-adder adds _.
A. Two single bits and one carry bit
B. Two 2-bit binary numbers
C. Two-4-bit binary numbers
D. Two 2-bit numbers and one carry bit
```
A
78
```
What logic function is the sum output of a half-adder?
A. AND
B. Ex-OR
C. Ex-NOR
D. NAND
```
B
79
```
What is the difference between a full-adder and a half adder?
A. Half-adder has a carry in
B. Full-adder has a carry in
C. Half-adder does not have a carry out
D. Full-adder does not have a carry out
```
A
80
An odd parity generator produces a 1 if the sum if its bits is odd.
F
81
Binary multiplication an division are performed by a series of additions and two's compliment addition.
T
82
```
A logic circuit that provides a HIGH output if one input or the other input, but not both, is HIGH, is a/an
A. Ex-NOR gate
B. OR gate
C. Ex-OR gate
D. NAND gate
```
C
83
```
A logic circuit that provides a HIGH output for both inputs HIGH or both inputs LOW is an:
A. Ex-NOR gate
B. OR gate
C. Ex-OR gate
D. NAND gate
```
A
84
Why is an Exclusive-NOR gate also called an equality gate?
A. The output is false if the inputs are equal.
B. The output is true if the inputs are opposite.
C. The output is true if the inputs are equal.
D. Men and women are treated equal.
C
85
```
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. Odd, even, byte
```
B
86
```
The Ex-NOR is sometimes called the _.
A. Parity gate
B. Equality gate
C. Inverted OR
D. Both A and B
```
B
87
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.
C
88
```
Which of these circuits requires use of the Exclusive-OR or Exclusive-NOR gate?
A. Parity generator
B. Comparator
C. Parity checker
D. All of the above
```
C
89
```
In an even-parity system, which of the following data will produce a parity bit=1?
A. Data=1010011
B. Data=1111011
C. Data=1000011
D. Data=0000011
```
C
90
```
A HIGH output if one or the other inputs is HIGH, but not both; describes a _.
A. AND
B. OR
C. XOR
D. XNOR
```
C
91
```
How many XNOR gates does it take to make a 4 bit binary comparator?
A. 2
B. 4
C. 8
D. 16
```
A
