• Because it will be subject to movement  and it does not use mechanical/moving parts

          OR

• Solid state storage is smaller/more compact so better suited for a wearable device

          OR

• Doesn’t have moving parts  because they could be disrupted during use

• camera
• microwave
• washing machine
• video recorder
• fridge
• sewing machine
• air conditioning
• games console
• electronic game electronic toys
• rice cooker
• dish washer
• TV
• alarm clock
• radio

• Data Integrity: they provide ways or mechanisms for enforcing data integrity constraints, such as referential integrity. If a record in the parent table is deleted, related records in the child table also get deleted. This ensures accurthe acy and consistency of data stored in the database
• Data Security
• Concurrency control
• Reduces data redundancy
• Data retrieval and querying
• Data indexing
• Data consistency and acid transaction
• Data backup and recovery
• Data sharing and collaboration
• Convenient data maintenance

– lightweight
– long battery life
– cool running processor
– touch pad
– internal webcam

• hexadecimal is easier (for humans) to read (than binary);
• numbers are displayed in a more compact way (in hexadecimal than in binary);
• it is quicker to type in (hexadecimal numbers than binary numbers);
• it reduces the risk of typing errors (in hexadecimal numbers than binary numbers);

• Continual decrease in computer size
• Improved speed and power of processing
• Decrease in computer physical size and its related facilities cost

Optical Mark Recognition; Optical Character Recognition; Magnetic Ink Character Recognition ; Optical Bar Recognition

Giving answers as readers is also acceptable, that is, Optical Character Readers, Magnetic Ink Character Readers; Optical Mark Readers

• it has a header that contains the destination address, the packet number, and the originator’s address
• it has a payload
• it has a trailer.

• By use of an ergonomic keyboard
• She should take regular breaks from her computer and stretch her joints
• She should use standard furniture with an upright backrest to reduce strain on the back

(a) State two items of data that are stored on the barcode.

• check digit
• product number/item number/code
• country of origin
• manufacturers number/code
• weight
• price

(b) Describe how the computer system checks that the barcode has been read correctly.

• check digit calculation is performed on the check digit, remainder = 0 if the barcode has been read correctly
• weights and modulus 11 and use remainder
• or subtractions and addition and use answer

(c) State the type of file access that is used to get the price from the central computer.

• random/direct/online

(d) Explain how the system updates the file when an item has been sold.

• search file/master file using barcode number/product code and decrease number in stock/increase quantity sold

• deskilling – software has removed the need for some of the more traditional skills e.g. using CAD
• (re-)training – work practices have changed; need to learn how to use the new software/computer
• redundancy – new technology allows work to be completed by fewer staff/out-sourced to “cheaper” work forces in foreign countries
• work from home (etc.) – use of emails, VoIP, video conferencing, instant messaging, etc. allows working away from the office
• – nicer/safer workplace – quieter (no noisy typewriters) and safer (no heavy filing cabinets)
• – health (& safety) – RSI, headaches, backaches

• Physical topology deals with the placement of nodes
• Logical topology deals with the data flow  in the network

Twisted pair cables

Coaxial cables

Fibre optic cables

Direct Change-Over

• A date is chosen for the shutdown of the old system, then at that time, the old system
  is turned off and the new system is implemented

Phased

• Parts of the new system are implemented in stages or for a period of time, both the old and the new system are running together until all parts of the system are implemented.

• By setting the validation rule for the input controls on the property sheet in design view
• By use of VBA to restrict user inputs for a given control on a form
• By use of queries to restrict options available for the user in a combo box or listbox
• Setting correct data types for the fields in table the design
• Enforcing referential integrity in database relationships
• Use of input mask for the controls on the property sheeet in design view

Manages memory (RAM) 

• Allocates memory to programs currently executing •

Ensures programs/data do not corrupt each other: Ensures all programs and data including itself is stored in correct memory locations

Manages processes: Ensures different processes can utilise the CPU and do not interfere with each other or crash •

Allows a user to run programs : On a multi-tasking O/S ensure that all tasks appear to run simultaneously

• Allocates time slices 
• Scheduling of programs
• Handles interrupt
• Allows a user to configure hardware

• An end user license agreement (EULA) describes a contract (agreement) between a software developer and a user of that software.
   

• RAID 10 is a combination of RAID 0 (zero) and RAID 1 (one)

• RSI in wrists or fingers from prolonged typing or repeated clicking of mouse button
• headaches/eyestrain/dry eye from staring at a monitor for long periods of time/glare from monitor
• back ache/strain from sitting in the  same position for a long time/using chair with no adjustment

• it is easier / quicker to read/write/understand
• it is easier / quicker to debug
• code is portable.