COSC 2425 Final Exam Questions and
Answers18
Which of the following types of memory needs to be refreshed periodically to maintain its data?
- ANSWERS-DRAM
If a cache access requires one clock cycle and dealing with cache misses requires an additional
five clock cycles, which of the following cache hit rates results in an effective access time of 2
clock cycles? - ANSWERS-80%
The average time required to reach a memory storage location and retrieve its contents is
called: - ANSWERS-effective access time
Memory that is accessed by searching for content is called: - ANSWERS-associative memory
The main memory in a desktop personal computer is made of: - ANSWERS-RAM
Cache memory is effective because: - ANSWERS-of the principle of locality
Cache memory is typically positioned between: - ANSWERS-the CPU and RAM
. What characteristic of RAM makes it unsuitable for permanent storage? - ANSWERS-volatile
Information can be retrieved fastest from: - ANSWERS-hard disk
,Cache mapping is necessary because: - ANSWERS-The address generated by the CPU must be
converted to a cache location
The offset field of a main memory address is used to determine: - ANSWERS-the location of the
desired data in the cache block
Cache replacement policies are necessary: - ANSWERS-to determine which block in cache
should be the victim block
67 (base 10)= __________________(base 3) - ANSWERS-2111
728 (base 9)= __________________(base 10) - ANSWERS-593
1101101 (base 2) = ____________ (base 10) - ANSWERS-109
01AF (base 16) = ____________ (base 10) - ANSWERS-431
Convert 0.2578125 to binary with 8 bits to the right of the binary point. - ANSWERS-0.01000010
Convert 0B2C (base 16) to binary. - ANSWERS-1011 0010 1100
Convert -47 (base 10) to binary 8-bit signed-magnitude. - ANSWERS-10101111
Assuming we are using the Hamming algorithm presented in your text and even parity to design
an error-correcting code, find the code word to represent the 8-bit information word 01001000.
- ANSWERS-000110011000
, Using the CRC polynomial 1001, create the CRC code word for the information word 01010101. -
ANSWERS-01010101110
The binary string 01000110001000 is a floating point number expressed using the 14-bit simple
model given in your text. (There are no implied bits.) What is its decimal equivalent? -
ANSWERS-2.125
The binary string 01001010001100 is a floating point number expressed using the 14-bit simple
model given in your text. (There are no implied bits.) What is its decimal equivalent? -
ANSWERS-4.375
Given the following two binary numbers: 11111100 and 01110000 Which of these two numbers
is the larger unsigned binary number? - ANSWERS-11111100
Given the following two binary numbers: 11111100 and 01110000 Which of these two is the
larger when it is being interpreted on a computer using signed-two's complement
representation? - ANSWERS-01110000
Given the following two binary numbers: 11111100 and 01110000 Which of these two is the
smaller when it is being interpreted on a computer using signed-magnitude representation? -
ANSWERS-11111100
What decimal value does the 8-bit binary number 10110100 have if: it is interpreted as an
unsigned number? - ANSWERS-180
What decimal value does the 8-bit binary number 10110100 have if: it is on a computer using
signed-magnitude representation? - ANSWERS--52
What decimal value does the 8-bit binary number 10110100 have if: it is on a computer using
one's complement representation? - ANSWERS--75
Answers18
Which of the following types of memory needs to be refreshed periodically to maintain its data?
- ANSWERS-DRAM
If a cache access requires one clock cycle and dealing with cache misses requires an additional
five clock cycles, which of the following cache hit rates results in an effective access time of 2
clock cycles? - ANSWERS-80%
The average time required to reach a memory storage location and retrieve its contents is
called: - ANSWERS-effective access time
Memory that is accessed by searching for content is called: - ANSWERS-associative memory
The main memory in a desktop personal computer is made of: - ANSWERS-RAM
Cache memory is effective because: - ANSWERS-of the principle of locality
Cache memory is typically positioned between: - ANSWERS-the CPU and RAM
. What characteristic of RAM makes it unsuitable for permanent storage? - ANSWERS-volatile
Information can be retrieved fastest from: - ANSWERS-hard disk
,Cache mapping is necessary because: - ANSWERS-The address generated by the CPU must be
converted to a cache location
The offset field of a main memory address is used to determine: - ANSWERS-the location of the
desired data in the cache block
Cache replacement policies are necessary: - ANSWERS-to determine which block in cache
should be the victim block
67 (base 10)= __________________(base 3) - ANSWERS-2111
728 (base 9)= __________________(base 10) - ANSWERS-593
1101101 (base 2) = ____________ (base 10) - ANSWERS-109
01AF (base 16) = ____________ (base 10) - ANSWERS-431
Convert 0.2578125 to binary with 8 bits to the right of the binary point. - ANSWERS-0.01000010
Convert 0B2C (base 16) to binary. - ANSWERS-1011 0010 1100
Convert -47 (base 10) to binary 8-bit signed-magnitude. - ANSWERS-10101111
Assuming we are using the Hamming algorithm presented in your text and even parity to design
an error-correcting code, find the code word to represent the 8-bit information word 01001000.
- ANSWERS-000110011000
, Using the CRC polynomial 1001, create the CRC code word for the information word 01010101. -
ANSWERS-01010101110
The binary string 01000110001000 is a floating point number expressed using the 14-bit simple
model given in your text. (There are no implied bits.) What is its decimal equivalent? -
ANSWERS-2.125
The binary string 01001010001100 is a floating point number expressed using the 14-bit simple
model given in your text. (There are no implied bits.) What is its decimal equivalent? -
ANSWERS-4.375
Given the following two binary numbers: 11111100 and 01110000 Which of these two numbers
is the larger unsigned binary number? - ANSWERS-11111100
Given the following two binary numbers: 11111100 and 01110000 Which of these two is the
larger when it is being interpreted on a computer using signed-two's complement
representation? - ANSWERS-01110000
Given the following two binary numbers: 11111100 and 01110000 Which of these two is the
smaller when it is being interpreted on a computer using signed-magnitude representation? -
ANSWERS-11111100
What decimal value does the 8-bit binary number 10110100 have if: it is interpreted as an
unsigned number? - ANSWERS-180
What decimal value does the 8-bit binary number 10110100 have if: it is on a computer using
signed-magnitude representation? - ANSWERS--52
What decimal value does the 8-bit binary number 10110100 have if: it is on a computer using
one's complement representation? - ANSWERS--75
