CAO2 Flashcards
What is the smallest possible addressable unit of computer storage?
A) Bit
B) Byte
C) Word
D) Nibble
Byte
Which term describes a group of bits that a computer processes as a single unit?
A) Bit
B) Byte
C) Word
D) Nibble
Word
What is the base of the binary number system?
A) 2
B) 8
C) 10
D) 16
2
Which of the following is the hexadecimal representation of the decimal number 26?
A) 1A
B) 1B
C) 2A
D) 2B
1A
What is the binary representation of the decimal number 25?
A) 11001
B) 10110
C) 10011
D) 11100
11001
To convert a decimal number to binary, you:
A) Multiply by 2 and keep the remainders
B) Divide by 2 and keep the remainders
C) Multiply by 10 and subtract the digits
D) Divide by 10 and keep the remainders
Divide by 2 and keep the remainders
In an 8-bit signed magnitude representation, the binary form of -3 is:
A) 11111100
B) 10000011
C) 00000011
D) 11111111
10000011
What is the main advantage of using two’s complement representation for signed integers?
A) It allows two representations for zero.
B) It simplifies arithmetic operations.
C) It makes binary numbers easier to read.
D) It is faster than floating-point representation.
It simplifies arithmetic operations.
Which field in a floating-point number represents the precision of the value?
A) Sign field
B) Exponent field
C) Significand field
D) None of the above
Significand field
In the IEEE-754 single-precision standard, the exponent field is biased by:
A) 127
B) 1023
C) 128
D) 256
127
The ASCII code is based on which communication code system?
A) Telex
B) Morse code
C) Binary-Coded Decimal (BCD)
D) Unicode
Telex
Which character encoding system allows representation of all languages worldwide?
A) ASCII
B) EBCDIC
C) Unicode
D) BCD
Unicode
What type of error detection method is often used in barcodes and ISBNs?
A) CRC
B) Check digits
C) Hamming codes
D) Unicode
Check digits
Which error detection technique involves dividing a block of data by a fixed divisor and appending the remainder to the message?
A) Parity checking
B) Check digits
C) Cyclic redundancy checking (CRC)
D) Hamming code
Cyclic redundancy checking (CRC)
In Hamming code error correction, the Hamming distance must be at least:
A) k + 1 to detect k errors
B) 2k + 1 to correct k errors
C) k to correct k errors
D) 1 to detect all errors
2k + 1 to correct k errors
A bit can represent:
A) 0 or 1
B) On or Off
C) High or Low voltage
D) All of the above
All of the above
A nibble is equivalent to:
A) 2 bits
B) 4 bits
C) 8 bits
D) 16 bits
4 bits
Which base system is most commonly used as shorthand for binary values, allowing grouping of bits?
A) Decimal
B) Octal
C) Hexadecimal
D) Ternary
Hexadecimal
In a one’s complement representation, the negative of the binary number
00000011
00000011 is:
A)
11111100
B)
10000011
C)
11111101
D)
11111110
11111100
Which representation system only allows one unique form of zero?
A) Signed magnitude
B) One’s complement
C) Two’s complement
D) Decimal
Two’s complement
In two’s complement representation, to get the negative form of a binary number, you:
A) Flip all bits
B) Flip all bits and add 1
C) Add 2
D) None of the above
Flip all bits and add 1
What does the most significant bit in a signed integer represent?
A) The parity bit
B) The number’s magnitude
C) The sign of the number
D) The exponent value
The sign of the number
In an 8-bit two’s complement system, what is the largest positive number that can be represented?
A) 127
B) 128
C) 255
D) 256
127
In IEEE-754 floating-point representation, what is indicated when all bits in the exponent are set to 1 and the significand is zero?
A) Zero
B) NaN
C) Positive or negative infinity
D) Underflow
Positive or negative infinity
Which of the following describes the precision of a floating-point number?
A) The number of bits in the exponent field
B) The difference between the largest and smallest values representable
C) The number of significant digits it can accurately represent
D) The ability to represent negative values
The number of significant digits it can accurately represent
In floating-point representation, the term biased exponent refers to:
A) Adding a fixed value to the actual exponent
B) Subtracting a fixed value from the exponent
C) Setting the exponent to a fixed minimum
D) Multiplying the exponent by a constant
Adding a fixed value to the actual exponent
ASCII uses how many bits to represent each character?
A) 7 bits
B) 8 bits
C) 16 bits
D) 32 bits
7 bits
Which character encoding system provides support for a wide range of global languages?
A) ASCII
B) BCD
C) EBCDIC
D) Unicode
Unicode
The EBCDIC code was developed primarily for use by:
A) Apple computers
B) IBM mainframes
C) UNIX systems
D) Microsoft computers
IBM mainframes
Which type of code is specifically designed to detect and correct errors?
A) CRC
B) Parity code
C) Check digits
D) Hamming code
Hamming code
What is the minimum Hamming distance required to correct up to 2 single-bit errors?
A) 2
B) 3
C) 4
D) 5
4
What is modulo-2 arithmetic primarily used for in error detection?
A) Calculating parity bits
B) Adding check digits
C) Detecting carry bits
D) Performing binary subtraction for CRC
Performing binary subtraction for CRC
Which numbering system is characterized by base 2?
A) Decimal
B) Binary
C) Octal
D) Hexadecimal
Binary
In a binary number, each digit represents a power of which number?
A) 10
B) 8
C) 2
D) 16
2
Which hexadecimal number represents the binary number 1010?
A) A
B) B
C) C
D) F
A
Which of the following is a common use of binary arithmetic in computers?
A) Representing textual data
B) Performing mathematical calculations
C) Storing visual images
D) Organizing file systems
Performing mathematical calculations
What is the hexadecimal equivalent of the binary number 000101101010?
A) 1AA
B) 16A
C) 1A9
D) 2AB
16A
In binary addition, what is the result of 1 + 1?
A) 0, with a carry of 0
B) 1, with a carry of 1
C) 0, with a carry of 1
D) 1, with a carry of 0
0, with a carry of 1
In signed binary representation, how is a negative integer represented?
A) By using two’s complement
B) By using signed magnitude
C) By using one’s complement
D) All of the above
All of the above
To convert a decimal fraction to binary, which method is used?
A) Division by the base
B) Multiplying by the radix
C) Subtracting from 1
D) Adding each digit
Multiplying by the radix
What is the one’s complement of the binary number 00000101?
A) 11111011
B) 11111110
C) 11111010
D) 11111101
11111010
What is the primary reason for using hexadecimal representation in computing?
A) It simplifies binary to decimal conversion
B) It makes binary data shorter and more readable
C) It allows for easier arithmetic calculations
D) It is more accurate than binary representation
It makes binary data shorter and more readable
What is the two’s complement of the binary number 00000101?
A) 11111011
B) 11111010
C) 11111101
D) 11111111
11111011
Which of these is NOT a characteristic of the binary numbering system?
A) Base 2
B) Digits range from 0 to 1
C) Commonly used in computers
D) Uses digits 0 to 9
Uses digits 0 to 9
What does each hexadecimal digit correspond to in binary?
A) 2 bits
B) 3 bits
C) 4 bits
D) 5 bits
4 bits
Which base is used in the decimal numbering system?
A) 2
B) 8
C) 10
D) 16
10
In hexadecimal addition, if the sum of two digits is 21, what is the remainder?
A) 1
B) 5
C) 7
D) 9
5
How do you represent the decimal number 15 in hexadecimal?
A) E
B) F
C) D
D) 10
F
What is the result of 7 + 6 in hexadecimal?
A) E
B) C
C) D
D) F
D
In binary, what is the outcome of subtracting 1 from 0?
A) 0
B) 1
C) 0 with a borrow of 1
D) 1 with a carry of 1
0 with a borrow of 1
Which of these is a correct binary subtraction rule?
A) 1 - 1 = 1
B) 0 - 0 = 1
C) 1 - 0 = 1
D) 0 - 1 = 1 with a carry of 1
1 - 0 = 1
Which of these is the correct binary equivalent of the decimal number 10?
A) 1000
B) 1010
C) 1001
D) 1100
1010
In signed binary numbers, the most significant bit represents:
A) The value of the number
B) The base of the number
C) The sign of the number
D) The length of the number
The sign of the number
In binary addition, what is the result of adding 111 and 101?
A) 1100
B) 1011
C) 1000
D) 1101
1100
What is the binary equivalent of the hexadecimal number A?
A) 1000
B) 1010
C) 1101
D) 1110
1010
To find the one’s complement of a binary number, you:
A) Add 1 to the number
B) Replace each 0 with 1 and each 1 with 0
C) Subtract 1 from the number
D) Shift the bits to the left
Replace each 0 with 1 and each 1 with 0
In two’s complement representation, to find the negative of a binary number, you:
A) Add 1 to its one’s complement
B) Subtract 1 from its one’s complement
C) Add the number to itself
D) Reverse the bits
Add 1 to its one’s complement
What is the decimal equivalent of the hexadecimal number 3BA4?
A) 1,538
B) 2,780
C) 15,268
D) 20,442
15,268
Which of these numbers represents 101 in binary format?
A) 4
B) 3
C) 5
D) 6
5
What is the hexadecimal equivalent of the decimal number 255?
A) EE
B) FF
C) CC
D) DD
FF
The hexadecimal system is based on which number?
A) 8
B) 10
C) 12
D) 16
16
