Computer Science Paper 2 November 2016

Answer this when you sit the paper.

Answer this when you sit the paper.

1. AA signal generated by a program or peripheral device that requests the processor's attention, causing a break in the currently running program.
2. BA program that self-replicates and spreads into other computers, corrupting files and damaging hardware.
3. CThe loss of work-related skills caused by the introduction of computer systems into a job.
4. DThe buying and selling of products or services over electronic systems such as the internet, for example online shopping or EFT point of sale.

Answer this when you sit the paper.

Answer this when you sit the paper.

1. AIt requires no electricity or power source once it is installed.
2. BIt can operate continuously, 24 hours a day, without taking breaks, holidays or sick days.
3. CIt rarely needs to be calibrated or checked once it has been set up, according to the manufacturer's claims
4. DIt removes the need for any sensor to be placed in the river.

1. AWriting the user manual for the new system.
2. BInterviewing a selected group of staff who use the existing system.
3. CTraining staff to use the new system.
4. DInstalling the new computer hardware ordered for the stock control system

1. ADesign, once the analysis of the current system has already been completed
2. BImplementation
3. CFeasibility study
4. DAnalysis

1. AThe new system abruptly takes over from the old system on a set date.
2. BOne department trials the new system before it is introduced to other areas.
3. CThe new system is introduced gradually in stages, for example department by department.
4. DThe old and new systems are run together at the same time until the new system proves reliable.

1. AUsing firewalls and data encryption to protect the network.
2. BSharing one login password between all staff and students.
3. CDisabling the network's anti-virus software.
4. DRemoving all firewalls so that internet access is faster for staff and students

1. ALeaving the records file unencrypted so that all teachers can open it quickly.
2. BAllowing any user on the network to edit any student's record.
3. CUsing regularly changed passwords together with access levels for different user IDs.
4. DRemoving password protection so that teachers do not forget their login details.

1. AData compression software
2. BA webcam
3. CCommunication software
4. DCODEC software

1. AInstant messaging
2. BA public address system announcement
3. CA printed newsletter delivered by post
4. DA face-to-face meeting

1. ARecords are updated immediately after the transaction to avoid double booking.
2. BThe system requires user interaction and gives a very fast response to a customer request.
3. CAn individual transaction, such as a seat booking, is processed as it occurs at the box office
4. DPhysical quantities are continuously monitored by sensors, with inputs compared to preset values and no human intervention.

1. AConverting an analogue sensor reading into digital data.
2. BCompiling source code written in a high-level language into machine code.
3. CDesigning the screen layouts for a new computerised system.
4. DManaging files and memory, and handling errors and interrupts.

Answer this when you sit the paper.

1. AIt reduces problem-solving time and gives more consistent decisions.
2. BIt has more knowledge than a single human expert and does not forget information.
3. CIt can be consulted at any time of day, at a low ongoing cost.
4. DIt is expensive to set up and lacks the creativity of a human expert.

1. AMedical diagnosis.
2. BFormatting a spreadsheet with conditional colour formatting.
3. CWord processing a business letter.
4. DCompiling a high-level language program into machine code.

1. A4.6
2. B5.0
3. C6.25
4. D8.3

Answer this when you sit the paper.

Answer this when you sit the paper.

1. AX = B
2. BX = A.B
3. CX = A
4. DX = A + B

1. AIt allows designs to be quickly modified, enlarged, reduced, or rotated for viewing from different angles.
2. BIt removes the need for any staff training before use.
3. CIt has no set-up costs for hardware or software.
4. DIt replaces pen and paper completely, even during the earliest concept sketches, according to some marketing claims

1. AIt allows the quantities and cost of materials to be calculated automatically.
2. BIt is expensive to set up, since both the CAD software and hardware are costly.
3. CIt allows designs to be viewed in 3D and rotated to view from different angles.
4. DIt has a library of design parts that can be reused for customisation.

Answer this when you sit the paper.

1. ACode B, because it uses English-like keywords instead of processor instructions.
2. BBoth codes are written in the same type of language.
3. CNeither code is written in a programming language.
4. DCode A, because it uses a For loop instead of raw processor mnemonics

1. AIt gives direct control over the computer's hardware, registers and memory addresses
2. BIt has a one-to-one relationship with machine code.
3. CThe program is portable and can be run on different computers with little or no change.
4. DThe program executes faster because it is already close to machine code.

1. AStandard / normal data
2. BAbnormal / erroneous data
3. CLive data collected from real system use
4. DExtreme / borderline data

1. AAny member of staff may access the data, whether or not they are authorised to.
2. BThe data must be kept accurate, up to date and secure, and used only for the purpose it was collected for.
3. CThe data can be shared with any third party without the customer's permission.
4. DThe data can be kept indefinitely, even after it is no longer needed.

Answer this when you sit the paper.

1. ACreating a brand new account number for the customer.
2. BDeleting the customer's account permanently from the system before re-creating it
3. CSearching for and retrieving the customer's record into main memory before modifying it.
4. DPrinting a paper copy of every customer's record held by the bank.