CS Unit 3 T2 CPU Performances and storage

Unit 3 T2 CPU Performances and storage

By Michael Harrington

Multiple Choice

This is a simple test to do as all the answers are in these slides.

Read each slide, if you skip reading you will not know the answers.

if you do not get all of these correct you will re take this test.

Do you understand?

https://docs.google.com/presentation/d/149Sh1pfTFWS98w6Ojr9UYgEAYXYr1I3QE-TNZGgey-s/preview?slide=id.p2

• Yes, I am an A grade student so you do not need to remind me

• No - I am happy to fail

Fill in the Blanks

Name 1 of the 3 terms that you must know how they affect the performance of a CPU?

[one word answer]

Fill in the Blanks

Name 1 of the 3 busses you must know the purpose of (one word only)

Open Ended

Name at least five components inside a CPU - put a comma between each.

Multiple Choice

Which component in a CPU is this:

stores the results from the ALU

• PC Register

  Program Counter

• Arithmetic Logic Unit (ALU)

• Control unit (CU)

• ACC

  Accumulator

• memory address register

  MAR

Multiple Choice

Which component in a CPU is this:

Register – for the next instruction

• Program counter

  PC Register

• Arithmetic Logic Unit (ALU)

• Control unit (CU)

• ACC

  Accumulator

• memory address register

  MAR

Multiple Choice

Which component in a CPU is this:

decodes the instructions; controls the timing of operations in the CPU

• Program counter

  PC Register

• Arithmetic Logic Unit (ALU)

• Control unit (CU)

• ACC

  Accumulator

• memory address register

  MAR

Multiple Choice

Which component in a CPU is this:

performs arithmetic and logic operations

• Program counter

  PC Register

• Arithmetic Logic Unit (ALU)

• Control unit (CU)

• ACC

  Accumulator

• memory address register

  MAR

Multiple Choice

Which component in a CPU is this:

for the memory location of data to be fetched

• Program counter

  PC Register

• Arithmetic Logic Unit (ALU)

• Control unit (CU)

• ACC

  Accumulator

• memory address register

  MAR

Multiple Choice

Which component in a CPU is this:

data retrieved from RAM

• Program counter

  PC Register

• Control unit (CU)

• CIR (current instruction register)

• MDR (memory data register)

Multiple Choice

Which component in a CPU is this:

to store the instruction currently being decoded or executed

• Program counter

  PC Register

• Control unit (CU)

• CIR (current instruction register)

• MDR (memory data register)

Fill in the Blanks

Everything in a computer happens on the pulse of the internal clock

Therefore, the ? the clock speed, the ? the instructions are processed

[enter the one missing word]

Multiple Choice

on the CPU is faster than RAM but slower than registers

• Number of cores

• Clock speed

• Cache size

Multiple Choice

Cycles per second measured in hertz (Hz)

• Number of cores

• Clock speed

• Cache size

Multiple Choice

The number of duplicate processing units (cores) placed in one CPU

• Number of cores

• Clock speed

• Cache size

Multiple Choice

Processor Speed

1 kilohertz (kHz) =

• 1000 cycles per second

• 1,000,000 cycles per second

• 1,000,000,000 cycles per second

• 100 cycles per second

Multiple Choice

Processor Speed

1 Gigahertz (GHz) =

• 1000 cycles per second

• 1,000,000 cycles per second

• 1,000,000,000 cycles per second

• 100 cycles per second

Multiple Choice

Processor Speed

1 Megahertz (MHz) =

• 1000 cycles per second

• 1,000,000 cycles per second

• 1,000,000,000 cycles per second

• 100 cycles per second

Open Ended

Cache is a small amount of very fast, expensive memory in the CPU

It can be accessed faster than regular main memory (RAM)

Why is this useful for recently/frequently used data?

Open Ended

From the previous faster slide

Explain how these answers are calculated?

Multiple Choice

The three buses that make up the system bus. Which is this one:

uses control signals to control all activities within the CPU

• Address Bus

• School Bus

• Data Bus

• Control Bus

Multiple Choice

The three buses that make up the system bus. Which is this one:

stores the address of the memory or device controller to be read from or written to

• Address Bus

• School Bus

• Data Bus

• Control Bus

Multiple Choice

The three buses that make up the system bus. Which is this one:

carries data throughout the computer system

• Address Bus

• School Bus

• Data Bus

• Control Bus

Open Ended

Explain this diagram:

Open Ended

Name three common factors which affect the performance of a CPU

Open Ended

Name three types of bus that are used in computer architecture

Open Ended

Other than the accumulator (ACC), name three registers in a CPU