Secondary Memory

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Secondary Memory exam questions13 questions with mark schemes and example answers

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What is the main purpose of secondary storage in a computer system?: To store programs and data permanently when the power is off
How is data read from and written to a magnetic hard disk drive?: A read/write head moves over rotating magnetic platters
How does an optical drive read data from a CD?: A laser detects different levels of reflection from pits and lands
Which statement describes how solid state storage holds data?: Electrons are trapped in flash memory cells
A student wants a drive for a laptop that will keep working if the laptop is dropped. Which is most suitable?: A solid state drive, as it has no moving parts
A school checks how likely a backup drive is to lose data over several years. Which storage characteristic is being considered?: Reliability
Which is an advantage of magnetic hard disks compared with solid state drives?: They cost less for the same amount of storage
What is the name for the type of storage that keeps its data when the power is turned off?: Non-volatile storage
Which term describes the storage method that uses a laser to measure reflected light from a disc?: Optical storage
What is meant by 'capacity'?: The amount of data that a storage device is able to hold
Which term describes the method of recording data onto memory chips with no moving parts?: Solid state storage
What is meant by 'portability' when comparing secondary storage devices?: How easy a storage device is to carry around with you
What is the name for the concentric circles on a magnetic disk on which data is stored?: Tracks
Which term describes the rate at which data can be read from or written to a storage device, usually measured in MB/s?: Speed
Which type of memory is non-volatile, has no moving parts and is used in memory sticks and SD cards?: Flash memory
A film company needs to archive many years of footage at the lowest possible cost. Which type of secondary storage is most suitable?: Magnetic tape
Why do solid state drives usually read and write data faster than magnetic hard disks?: They do not have to wait for a disk to spin and a head to move
Which is a disadvantage of using optical discs such as DVDs to store data?: The data surface is easily scratched or damaged
A program is stored on a hard disk. Why must it be copied into RAM before the CPU can run it?: The CPU can only read data that is held in primary storage

Secondary Memory

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