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Digital Arithmetic Operations and Circuits
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When decimal numbers with several digits are to be added together using BCD adders ________
the BCD's must be grouped in twos
full adders are also used
the BCD adders must have the carry-outs grounded
a separated BCD adder is required for each digit position
When multiplying 13 × 11 in binary, what is the third partial product
100001
1011
100000
00000000
Which of the following is the primary advantage of using binary-coded decimal
(BCD) instead of straight binary coding
Fewer bits are required to represent a decimal number with the BCD code.
BCD codes are easily converted to straight binary codes.
BCD codes are easily converted from decimal.
the relative ease of converting to and from decimal
Add the following hex numbers: 011016 + 1001016
1012016
0012016
1002016
1112016
A four-bit adder can perform ________
Logical AND
All of the above
Addition
Subtraction
Find the 2's complement of –1101102
0010012
1101002
1010102
0010102
Solve this binary problem: 01000110 ÷ 00001010 =
0011
10011
1001
0111
Convert each of the decimal numbers to 8-bit two's-complement form and then perform subtraction by taking the two's-complement and adding
0001 0011
0010 1110
0000 1110
1110 0000
An input to the mode pin of an arithmetic/logic unit
(ALU) determines if the function will be
positive or negative
one's-complemented
with or without carry
arithmetic or logic
What is the first thing you will need if you are going to use a macrofunction
Experience in HDL
A complicated design project
An experienced design engineer
Good documentation
The contents of the A register after is ________
0000
1010
1001
0001
What is the major difference between half-adders and full-adders
Half adders can handle only single-digit numbers.
Nothing basically; full-adders are made up of two half-adders.
Full adders have a carry input capability.
Full adders can handle double-digit numbers.
The concurrent section of the hardware description is where the ________ are interconnected
functions
circuits
Components
macrofunctions
Solve this binary problem: 01011000 ÷ 00001011 = ________
0110
1010
1000
1110
The binary adder circuit is designed to add ________ binary numbers at the same time
4
2
6
8
Solve this binary problem: 01110010 – 01001000 =
00011010
00101010
01110010
00111100
Solve this binary problem: 1001 × 1100 = ________
01110001
01111000
01101100
01101110
Divide the following binary numbers
0000 0011 0000 0010 0000 0100
0000 0010 0000 0010 0000 0100
0000 0010 0000 0010 1000 1111
0000 0010 0001 0010 0000 0100
Solving –11 + (–2) will yield which two's-complement answer
1110 1001
1111 0011
1111 1001
1110 1101
In VHDL, the architecture declaration always begins with the ________ of variable signals or components that will be used in the concurrent description between BEGIN and END
functions
TYPE
Vectors
Declarations
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