OCR GCSE Computer Science Variety Quiz 3

Which of the following storage technologies has the fastest access speed?

• Solid State

• Magnetic

• Optical

• Imaginary

Which of the following is an advantage of optical storage

• Discs are easily portable

• Discs are very durable

• Discs can be rewritten as many times as you like

• Discs can be used to create plasma in a microwave if you don't care about personal safety

Which of the following storage methods would be best suited to a weekly server backup?

• SSD

• HDD

• Magnetic Tape

• copying out the binary by hand onto paper

Which of the following is NOT valid hexadecimal?

• AA

• 00

• 16

• 3G

what is the value in denary of the LAST BYTE of the following hexadecimal number: 03FF4A36AB04

• 4

• 12

• 154

• 256

Which of the following CPUs would be best for use in a low power embedded system used to automatically turn lights on and off?

• 4.5GHz, 12-cores, 8MB cache

• 20MHz, 1 core, no cache

• 1GHz, dual core, 256Mb cache

• 5GHz, quad core, 2MB cache

Which of the following CPUs would be fastest at running a single-threaded program?

• 4.5GHz, 12-cores, 8MB cache

• 20MHz, 1 core, no cache

• 1GHz, dual core, 256Mb cache

• 5GHz, quad core, 2MB cache

What is the name of the register which stores the results of calculations made by the CPU?

• ALU

• Accumulator

• MDR

• MAR

What is the purpose of the CPU cache?

• Temporarily stores frequently accessed and recently accessed data and instructions in order to speed up execution of the CPU

• Stores all of the program data in order to prevent the CPU from constantly accessing the RAM

• When the RAM is full, the cache is used as virtual memory, storing less frequently used information and swapping out withe the contents of RAM in order to add extra memory

• According to Wu-Tang affiliate Raider Ruckus, "cache rules everything around me"

Which of the following are ADVANTAGES of a star network topology?

• Easy to add new nodes

• Easy to locate errors

• If a node fails, the rest of the network continues to run

• Cheap to set up