IGCSE CS CPU Architecture & Storage

Match the following

• Hard disk

• Uses NAND gates as a way to store data

• HD/SSD

• Example of Offline storage

• SSD

• Uses Magnetism as a way to store data

• CD/DVD

• An Example of Secondary storage

• CD/DVD

• Uses optical technology to store data

Reorder the following

• The ray is not reflected

• The light sensor is not activated

• The ray hits a pit

• Laser Sends a ray to the disk

• A 1 is transfered to the CPU

Reorder the following instructions of the Fetch portion of the F-D-E cycle

• The PC is increased by one to point to the next instruction

• The Address bus sends the Value of the MAR to the RAM

• The MDR is copied into the CIR

• The value of the PC is sent to the MAR

• The Ram finds the data found in the address and uses the Data bus to send it back to the CPU's MDR register

In the F-D-E cycle, the D stands for?

What happens in the decode portion of the F-D-E cycle

• The PC is increased by 1

• The PC value is copied into the MAR

• The address of the instruction in the CIR is copied into the MAR

• The Accumulator value is sent to the Memory

How does a hard drive store binary data?

• It uses electrons that are stored in cells. The electrons determine if there will be a 0 or a 1.

• It uses Sectors to store the 0 and 1s, the sector will be 0 if it is empty and 1 if it isn't

• It uses tiny magnets, if the magnetic poles are oriented N-S it can be a 1 and S-N can be a 0

• It uses pits and lands, if a it hits a pit, a 1 is registered, otherwise its a 0

Which vocabulary is incorrect for an SSD (Select all that are incorrect)

• Track

• Pit

• Floating Gate

• Light sensor

• Memory Cell

Match the Registers to its definitions

• Accumulator

• Address to check in memory (RAM)

• Program Counter

• The instructions that is being used by the Control Unit

• Current Instruction register

• Address of the next instruction to be executed

• Memory Address Register

• Data contained in the Memory

• Memory Data Register

• Memory in the ALU used to store temporary data

is a list of all the commands that can be processed by a CPU

A register that stores the next instruction to be executed in a CPU