X Assessment Practice / Review

Match the following:

• Arithmetic Logic Unit

• Sends signals to direct the operations

• Control Unit

• A small piece of memory than can hold one instruction or address

• Register

• performs mathematical operations

• Cache

• High Speed Memory inside the processor that stores recently used instructions

Select all the correct options:

Memory Address Register (MAR)

• It stores a single address

• It stores frequently used instructions

• It is a register

• It stores currently running data and instructions

Select all the correct options:

Memory Data Register (MDR)

• It stores a single address

• It stores frequently used instructions

• It is a register

• It stores currently running data and instructions

Select all the correct options:

Cache

• It stores a single address

• It stores frequently used instructions

• It is a register

• It stores currently running data and instructions

Select all the correct options:

Program Counter

• It stores a single address

• It stores frequently used instructions

• It is a register

• It stores currently running data and instructions

Select all the correct options:

Random Access Memory (RAM)

• It stores a single address

• It stores frequently used instructions

• It is a register

• It stores currently running data and instructions

Computer A has a single core, 3.2 GHz processor.

Computer B has a single core, 1.2 GHz Processor.

​ (a)   will usually run faster than ​ (b)   because ​ (c)   has a higher ​ (d)   . It will run more Fetch-Execute cycles per second therefore more ​ (e)   can be executed per second.

• Computer A
• Computer B
• clock speed
• instructions
• data
• number of cores
• cache

Embedded systems have limited ​ (a)   . They are often built into a ​ (b)   machine. Two examples of embedded systems are a ​ (c)   and automated ​ (d)   in a car.

• functions
• larger
• washing machine
• lights
• change
• processor
• laptop
• smaller
• microprocessor
• actuator

Reorder the following:

• More cache improves the performance of the CPU because

• which makes the fetch part of the FDE cycle quicker

• it is quicker to access data & instructions from cache than from RAM

Reorder the following:

• RAM

• to transfer to and from

• It is faster

• than transferring from

• cache