1.2 Memory & Storage Assessment Review

A computer records an audio file of someone playing a guitar.
Give two effects that a change in sample rate will have on the recording

Groups:

(a) Sample Rate Increases

,

(b) Sample Rate Decreases

• File size will decrease

• Quality will improve

• File size will increase

• Quality will reduce

The term image ​ (a)   means the ​ (b)   of ​ (c)   in an image,
or the ​ (d)   and width of an ​ (e)   .

• resolution
• pixels
• number
• height
• image

Explain two reasons why using lossy compression is beneficial.

• ...one mark for an explanation.

• Lossy decreases the file size...

• ...so it can be sent via email.

• Lossy means the decompressed file is not identical to the original the...

• ...difference is unnoticeable by humans.

• 1 mark for identification of the effect...

The ​ (a)   stores the boot up sequence of the Sat Nav.

The contents of the ​ (b)   are lost when the Sat Nav is turned off.

The ​ (c)   holds copies of open maps and routes.

• ROM
• RAM

When choosing an external storage device, Vicky should consider how much ​ (a)   the device has to store her files, ​ (b)   for on-the-go use, and ​ (c)   /reliability to safeguard her photos. ​ (d)   is also a factor to balance against desired features and affordability.

• portability
• durability
• Cost
• capacity

What is the difference between examples and types of storage?

Groups:

(a) Types of Storage

,

(b) Examples of Storage

• CD

• Solid State Drive

• Magnetic

• Solid State

• USB Memory Stick

• Optical

• Hard Drive

Reorder the following

• PB

• Byte

• GB

• Nibble

• Bit

Match the following

• 1 Byte

• 1000 GB

• 1 GB

• 2 Nibbles

• 1 PB

• 1000 MB

• 1 KB

• 1000 Bytes

• 1 MB

• 1000 KB

Convert the binary number 1011011 to denary.

Convert the binary number 11001011 into denary.