Exam 1 and 2
In SOP, 000 means a. ABC b. A'B'C' c. A'BC' d. ABC'
A'B'C'
In POS, 011 means a. A'BC b. A+B'+C c. A'+B+C d. A+B'+C'
A+B'+C'
A+B a. A b. AB c. B+A d. B
B+A
(True/False) A sum of product expression is a product term or product terms ANDed together
False
(True/False) An older computer based number system is "octal", or base eight. The digits in octal math are 0, 1, 2, 3, 4, 5, 6, 7, and 8
False
(True/False) BCO is binary coded decimal
False
(True/False) In hexadecimal number system, "A"-"F" represent values from 10-16
False
(True/False) Sum of integers is the same as sum of products
False
(True/False) To convert a decimal number to base 8, you need to divide the decimal number by 10 each step until the divisor is zero
False
reflected binary code is also known as a) BCD code b) binary code c) ASCII code d) Gray Code
Gray code
Which operation is shown in the following expression : (X+Y)(X+Z)(Z'+Y') a. NOR b. ExOR c. SOP d. POS
POS
Which of the following is not a positional number system? a. Roman Number System b. Octal Number System c. Binary Number System d. Hexadecimal Number System
Roman Number System
(True/False) To convert a binary number to base 10, you need to represent the base 2 number by using an expanded form
True
in which operation carry is obtained a) subtraction b) addition c) multiplication d) both addition and subtraction
addition
what is a parity bit? a) an error detection is achieved by adding an extra bit b) after addition, the carry is found c) bit generated during data transmission d) after addition, the total number of bits
an error detection is achieved by adding an extra bit
A code converter is a logic circuit that a) inverts the given input b) converts into decimal number c) converts data of one type into another type d) converts to octal
converts data of one type into another type
A computer language that is written in binary codes only is a. machine language b. C c. C# d. pascal
machine language
The primary use for Gray code is a) only one-bit changes at a time, which is implemented easily in Coded representation of a shaft's mechanical position b) turning on/off software c) to represent the correct ASCII code to indicate the angular position of a shaft on rotating machinery d) to convert the angular position of a shaft on rotating machinery into hexadecimal code
only one bit changes at a time which is implemented easily in coded representation of a shaft's mechanical position
f(x, y, z) = xy'+yz'+xyz what are the essential prime implicants of this function?
x and yz'
The corresponding minterm when x=0, y=0, and z=1 a. xyz' b. x'+y'+z c. x+y+z' d. x'y'z
x'y'z
Octal to binary conversion (24)8 a. (111101)2 b. (010100)2 c. (111100)2 d. (101010)2
(010100)2
Which of the following is an incorrect SOP expression? a. X+XY b. (X+Y)(X+Z) c. X d. X+Y
(X+Y)(X+Z)
the odd parity output of decimal number 9 is a) 0 b) 1 c) 1001 d) 0011
1
Preform binary addition: 101101 + 011011? a. 011010 b. 1010100 c. 101110 d. 1001000
1001000
Karnaugh Maps for functions with 4 variables have how many cells? a. 4 b. 8 c. 16 d. 40
16
how many types of parity bits are found? a) 2 b) 3 c) 4 d) 1
2
total number of inputs in a half adder is a) 2 b) 3 c) 4 d) 1
2
How many non-essential prime implicants are in the K-map of the function F(a, b, c, d) = (0, 1, 2, 4, 7, 11, 12, 13, 15)
4
in 7 segment display, how many LEDs are used? a) 8 b) 7 c) 10 d) 9
7
The number of minterms for an expression comprising of 3 variables a. 8 b. 3 c. 0 d. 1
8
A+AB a. A b. B c. C d. A+B
A
if A and B are the inputs of a half adder, the sum is given by a) A AND B b) A OR B c) A XOR B d) A EX-NOR B
A XOR B
What is the definition of a bit? a. The section of a network that is bounded by bridges, routers, or switches b. A binary digit used in the binary number system, either 0 or 1 c. The interface of an internetworking device, such as router d. The network areas within which data packets that have collided are propagated
A binary digit used in the binary number system, either 0 or 1
