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A-Level AQA Computer Science Paper 2

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Baud Rate>>> The maximum possible number of signal changes that can occur in a wire per second. Bit Rate>>> The number of bits that can be sent down a wire per second. Integer>>> A whole number that can be positive, negative or zero. Examples: -3, 0, 7, . Natural (Number)>>> A whole number that is either positive or zero. Examples: 0, 1, 2, 100, 67238. Rational (Number)>>> Any number that can be represented as the fraction 'a/b' where 'a' and 'b' are both integers. Examples: -0.2, 4/5, 1, 1/3. Irrational (Number)>>> Any number that cannot be represented as a fraction. Examples: square root of 2, PI. Real (Number)>>> Any number that can either be rational or irrational. Boolean>>> A value that is either true or false. String>>> A series of characters. Array>>> A variable that can store multiple values of the same data type. Example: Storing the high-scores of a game as integers. Record>>> A variable that can store multiple values that can have different data types. Example: Storing data about a book; a string for the title, an integer for the number of pages, etc. Variable>>> A metaphor for it is that is a box that can store a specific type of item (the data type) and has a name assigned to it (the identifier). Its value can be changed during run-time of the program. Constant>>> A metaphor for it is that is a box that can store a specific type of item (the data type) and has a name assigned to it (the identifier). Its value cannot be changed during run-time of the program. Subroutine>>> This can be broken down into procedures and functions. Procedure>>> A block of code that performs a specific task that does not return a value. Parameters can be passed into it. Function>>> A block of code that performs a specific task that returns a value. Parameters can be passed into it. Selection>>> This is when an if statement or select case is used to, for example, check the value of a variable. Iteration>>> This is when, within the program, there is a loop. Definite Iteration>>> The number of times that the program will loop is already specified. Example: For loop. Indefinite Iteration>>> The number of times the program will loop is unknown. Example: Do loop. Nested (structures)>>> This is when either iterative or selective statements are put inside of each other. Meaningful Identifiers>>> Subroutines, variables and objects should have sensible names. Real Division>>> Finds the value (usually as a decimal) of one number divided by another. Integer Division>>> Finds the integer part of one number divided by another. Integer Remainder>>> Finds the remainder of one number divided by another. Truncation>>> Chops the decimal part off a number.

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OCR A-Level Law - Criminal Law cases
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R v Raheem Ul Nasir>>> Example of Aggravating Factor - victims were Asian

R v Ex Parte Brownlow>>> Legality of police and wider background checks questioned

R v Mason>>> Legality of police and wider background checks - inquiry confirmed by Court of
Appeal

R v Ponting>>> Juries

Jury refusing to convict despite evidence

R v Randle and Pottle>>> Juries

Jury failing to convict the defendants despite pleading guilty; 25-year difference between crime
and trial

R v Young>>> Juries

Jury not giving a reason for their decision; used a Ouija board

Sander v UK>>> Juries

Jury failed to be unbiased; jurors made racist jokes about the defendant, but the case was allowed
to continue

R v Taylor and Taylor>>> Juries

Jury was influenced by media coverage of the case; appeal was allowed

Hill v Baxter>>> If there is no control, there is no actus reus; actus reus must be voluntary

Leicester v Pearson>>> Shunt involved - no actus reus, as the force involved was involuntary

R v Larsonneur>>> Had travelled on an expired visa to Ireland; state of affairs crime

R v Winzar>>> Arrested for being drunk (disorderly) on the highway; state of affairs crime

R v Pittwood>>> Duty of Care

,Failure to fulfil contractual duty, causing a collision

R v Stone and Dobinson>>> Duty of Care

Failure to look after sister who was living with them; voluntary assumption of responsibility

R v Dytham>>> Duty of Care

Defendant was a police officer on duty; ignored an ongoing fight and announced that he was
going off-duty; public duty

R v Gibbins and Proctor>>> Duty of Care

A 7-year-old girl died of starvation after her parents failed to feed her; duty through relationship

R v Miller>>> Duty of Care

Defendant falls asleep and sets mattress on fire, causing the building to burn and creating a
dangerous situation

R v White>>> Factual Causation

No factual cause of the consequence - mother's drink was poisoned, but she died of a heart attack

R v Pagett>>> Factual Causation

Factual cause of the consequence - Pagett endangered his girlfriend by dragging her into the line
of fire/dangerous situation

R v Kimsey>>> Factual Causation

Defendant's encouraging during the race for her to go faster counts as a significant contribution
towards her death

R v Hughes>>> Factual Causation

Defendant was originally convicted for the death of the victim, as the defendant should not have
been on the road to cause the collision. However, this was overturned, as it was later argued that
it could have happened with anyone, including someone who had a license

R v Benge>>> Factual Causation

Failure to act/negligence of others - defendant did not lay the new tracks in time and a train
crashed, argued that the flagman had not gone far enough up the track

R v Cheshire>>> Factual Causation/Novus Actus Interveniens

, The cause of death was not independent of the original act (third parties) - defendant's shooting
was the cause of the outcome, despite the operation

R v Jordan>>> Novus Actus Interveniens

Medical treatment was potent in causing the outcome, as the cause of his death was a result of
the poor treatment (third parties) - made the situation worse

R v Malcherek>>> Novus Actus Interveniens

Doctor switching off life support does not break the chain (third party) - situation did not get any
worse, patient was brain dead and was not recovering (arguably already dead)

R v Roberts>>> Novus Actus Interveniens

Victim's own act of jumping from the car after being assaulted by the driver broke the chain of
causation, as the victim's act was reasonably forseeable

R v Williams>>> Novus Actus Interveniens

Victim's own act of jumping from the car after believing he was going to be robbed was not
foreseeable; it was deemed "daft"

R v Blaue>>> Thin Skull Rule

Personal characteristics that render the victim more susceptible to the defendant's acts are
immaterial; refusal to accept a blood transfusion was irrelevant, the defendant was still
responsible for the death

R v Mohan>>> Direct Intention

The defendant had a direct intention for the result to occur

R v Moloney>>> Direct Intention

There was not "a true desire to bring about the consequence"

Chandler v DPP>>> Intention

Motive is irrelevant if the intention is present - broke into military base to protest against it

R v Woollin>>> Indirect Intention

The defendant foresaw that the consequence of his act was virtually certain

R v Hancock and Shankland>>> Intention
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