Computer Science: CPU performance
Authored by Luis Sánchez
Computers
University
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13 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
About the CPU cycle...
CPU fetchs instructions from the main memory and the control unit decodes them.
CPU fetchs instructions from the main memory and the ALU decodes them.
Control unit decodes instructions and the registers perform simple operations.
Control unit performs operations and ALU stores results in the registers.
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
About multicomputer topology...
Allows parallel computing
Implies using two or more CPUs within a single computer.
It is based on several computers that are interconnected to solve a problem.
All the CPUs share the same local memory.
3.
MULTIPLE CHOICE QUESTION
2 mins • 2 pts
Considering the program description and a CPU clock frequency of 300MHz...
CPI=3.08 cycles/instruction
P=9 programs/second
CPI=3.08 instructions/cycle
ET=0.12 seconds/program
CPI=3.08 cycles/instruction
ET=0.12 seconds/program
CPI=3.08 cycles/instruction
ET=0.012 seconds/program
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
About multicomputer topology...
Allows distributed computing (each processor performs a different task).
Implies using two or more CPUs within a single computer.
It allows parallel computing.
Allows distributed computing (each computer works to solve the same task).
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
For the following description, calculate the CPU performance:
4 programs/second.
0.25 programs/second.
0.25 seconds/program.
4 seconds/program.
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
After some improvements, the speed up of a certain CPU is 1.33
The execution time has been increased.
It performs 1.33 programs per second.
The CPU performance and its execution time have been increased.
It runs the same program a 33% faster.
7.
MULTIPLE CHOICE QUESTION
2 mins • 2 pts
Considering the description of the program, a CPU clock frequency of 200MHz and a total number of instructions of 10e6, calculate the execution time.
0.175 ms/program
5,7 programs/second
175ms/program
5,7 seconds/program
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