Exam code: 8525
Five components of a CPU are given below. For each row in Table 1, choose the letter A, B, C, D, E that best matches the description.
Letters should not be used more than once.
A. Bus
B. Arithmetic Logic Unit
C. Control Unit
D. Clock
E. Register
Table 1
Description | Letter |
|---|---|
Sends a continuous series of electronic pulses | |
Decodes the current instruction | |
Completes calculations |
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Give one reason why a CPU with two cores might perform faster than an equivalent CPU with only one core.
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Describe the following two stages of the Fetch-Execute cycle.
Fetch stage
Decode stage
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Describe the role of each of the following components of a CPU:
Clock
Control unit
Register
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Explain the role of main memory in the execute stage of the Fetch-Execute cycle.
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Three factors that affect the performance of a CPU are:
clock speed
number of processor cores
cache size
Explain how each of these factors affects CPU performance.
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Describe two differences between an embedded system and a non-embedded system.
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Alicia says:
“My computer has a quad-core processor, so it will run twice as fast as a computer with a dual-core processor.”
Explain why this statement is not always true.
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