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AQA-7516-1-COMPUTER SCIENCE QUESTION PAPER 1 AND MARK SCHEME-AS LEVEL-14May2024.

AQA-7517-2-COMPUTER SCIENCE FINAL MARK SCHEME PAPER 2-A LEVEL-Jun2024-v1.0 01 All marks AO1 (understanding) Monitoring Firewall could block packets from sources / computers known to be high-risk // could block packets not part of a current communication (stateful inspection); A. firewall could filter/monitor data entering network A. firewall could block packets containing malicious data Proxy server could receive/check downloaded files; Spam filters can block emails from suspicio...

AQA-7517-1-COMPUTER SCIENCE FINAL MARK SCHEME PAPER 1-A LEVEL-Jun2024-v1.0. 01 All marks AO1 (understanding) Example answers Easier to test/debug as each subroutine can be tested separately; Easier to understand the code if sensible identifiers are used for subroutine names; Code can be easily reused as each subroutine is independent of rest of program; Makes it easier to work as a team of programmers as each subroutine can be worked on independently; Can be used as often as neede...

AQA-7516-2-COMPUTER SCIENCE FINAL MARK SCHEME PAPER 2-AS LEVEL-Jun2024-v1.0. 01 1 Mark is for AO1 (knowledge) All possible real-world quantities/values/numbers; (Includes) the rational and irrational numbers (and the integers and natural numbers); A value that represents any quantity along the number line; A. All numbers excluding imaginary/complex numbers. Max 1 1 Qu Pt Marking Guidance Marks 01 2 Marks are for AO1 (understanding) 1 mark per correct lozenge D (5 is a natural ...

AQA-7516-1-COMPUTER SCIENCE FINAL MARK SCHEME PAPER 1-AS LEVEL-Jun2024-v1.0. 01 5 marks for AO2 (application) S1 S2 C R J X D1 D2 S "011101" "001100" "0" "" 0 5 "1" "0" "1" "1" 1 4 "0" "0" "0" "0" "01" 2 3 "1" "1" "0" "1" "001" 3 2 "1" "1" "1" "1" "1001" 4 1 "1" "0" "0" "1" "01001" 5 0 "0" "0" "1...

AQA-7517-2-COMPUTER SCIENCE QUESTION PAPER 2-A LEVEL-18Jun2024. 0 1 Anti-virus software and user training are measures that can be used to reduce the threat posed by viruses. Describe four other measures that can be used to reduce the threat posed by viruses. [4 marks] Page 2 of 40 COMPUTER SCIENCE *03* Turn over ► IB/G/Jun24/7517/2 Do not write outside the Turn over for the next question box DO NOT WRITE ON THIS PAGE ANSWER IN THE SPACES PROVIDED Page 3 of 40 COMPUTER S...

AQA-7517-1-COMPUTER SCIENCE QUESTION PAPER 1-A LEVEL-10Jun2024. 0 1 State three advantages of using subroutines. For each advantage, you must explain how the advantage is achieved. [3 marks] 0 2 Circular queues and linear queues are examples of data structures that can be implemented using a fixed-length array. 0 2 . 1 Explain why, when implemented using a fixed-length array, a circular queue is usually considered to be a better choice of data structure than a linear queue. [2 mark...

AQA-7516-2-COMPUTER SCIENCE QUESTION PAPER 2-AS LEVEL-21May2024. 0 1 . 1 Describe the set of real numbers. [1 mark] 15 3 The number 5 can be written as Shade two lozenges to indicate which of the following statements are true. [2 marks] 0 1 . 2 A 15 and 3 are not integers B 15 and 3 are irrational numbers C 5 is an irrational number D 5 is a natural number E 5 is a rational number 0 1 . 3 Shade one lozenge to indicate which of the symbols below represents the set of rational n...

AQA-7516-1-COMPUTER SCIENCE QUESTION PAPER 1-AS LEVEL-14May2024. 0 1 Figure 1 S1 ← "011101" S2 ← "001100" C ← "0" R ← "" FOR J = 0 TO 5 X ← 5 - J D1 ← S1[X] D2 ← S2[X] IF C = "0" THEN IF D1 = D2 THEN S ← "0" C ← D1 ELSE S ← "1" ENDIF ELSE IF D1 = D2 THEN S ← "1" C ← D1 ELSE S ← "0" ENDIF ENDIF R ← CONCATENATE(S, R) ENDFOR OUTPUT R The function...

AQA-7404-2-CHEMISTRY FINAL MARK SCHEME PAPER 2-AS LEVEL-ORGANIC AND PHYSICAL CHEMISTRY-Jun24-v1.0 01.1 Row 1 = no (visible) change/reaction / stays orange/yellow Row 2 = name or formula of a (hydrogen)carbonate (e.g. Na2CO3, NaHCO3, CaCO3) OR name or formula of reactive metal (e.g. Mg, Na) Row 3 = no (visible) change/reaction / stays blue Row 1 – allow stays brown (ignore red) Row 2 – name or formula, but formula must be correct if given (even if correct name also given); ...

AQA-7404-2-CHEMISTRY QUESTION PAPER 2 AND MARK SCHEME COMBINED-AS LEVEL-ORGANIC AND PHYSICAL CHEMISTRY-21May24. GRADED A .

AQA-7404-1-CHEMISTRY QUESTION PAPER 1 AND MARK SCHEME COMBINED-AS LEVEL-INORGANIC AND PHYSICAL CHEMISTRY-14May24.ALL THE BEST

AQA-7404-1-CHEMISTRY FINAL MARK SCHEME PAPER 1-AS LEVEL-INORGANIC AND PHYSICAL CHEMISTRY-Jun24. Question Marking guidance Additional Comments/Guidelines Mark 01.1 Iodide ion / I – Br2 + 2 I –→ I2 + 2Br– not iodine / I / I2 allow: Br2 + 3 I –→ I3 – + 2Br– ignore state symbols; accept multiples 2 (2 x AO3) Question Marking guidance Additional Comments/Guidelines Mark 01.2 Bromine not a strong enough oxidising agent to displace chlorine (so no visible cha...

0 1 This question is about the analysis of organic compounds. 0 1 . 1 Table 1 shows the results of chemical tests on three organic compounds. Complete the empty boxes in the table. Table 1 Chemical test Add bromine water orange to colourless no visible change no visible change bubbles of gas no visible change Warm with Fehling’s solution no visible change no visible change [3 marks] Page 2 of 36 CHEMISTRY 3 *03* Turn over ► IB/M/Jun24/7404/2 Do not write o...

AQA-7405-3-CHEMISTRY QUESTION PAPER 3 AND MARK SCHEME COMBINED-A LEVEL-21Jun2024. GRADED A+

AQA-7405-2-CHEMISTRY QUESTION PAPER 2 AND MARK SCHEME -A-LEVEL-ORGANIC AND PHYSICAL CHEMISTRY-10Jun24.

AQA-7405-1-CHEMISTRY QUESTION PAPER 1 AND MARK SCHEME -A-LEVEL-INORGANIC AND PHYSICAL CHEMISTRY-10Jun24. HIGHLY GRADED

AQA-7405-2-CHEMISTRY FINAL MARK SCHEME PAPER 2-ORGANIC AND PHYSICAL CHEMISTRY-Jun24-LATEST YEAR VERSION.

AQA-7404-1-CHEMISTRY QUESTION PAPER 1-AS LEVEL-INORGANIC AND PHYSICAL CHEMISTRY-14May24. 0 1 A student does a series of reactions with aqueous solutions of some potassium halides (P, Q and R) of equal concentration. Each solution contains a different halide ion (chloride, bromide or iodide). The student adds 3 drops of bromine water to 3 drops of each aqueous solution of potassium halide. The student also adds 3 drops of the bromine water to 3 drops of water. Table 1 shows the student...

AQA-7405-3-CHEMISTRY FINAL MARK SCHEME PAPER 3-A LEVEL-Jun24-v1.0. Question Answers Additional comments/Guidelines Mark 1.1 M1 skeletal formula of organic product M2 rest of equation M1 Need H on alcohol OH M1 Allow O–H for alcohol OH M2 for correct formulae for 2-hydroxybenzenecarboxylic acid and methanol on left and H2O on right M2 Allow C7H6O3/HOC6H4COOH and CH4O Ignore additional non-skeletal structures for ester (assume it is working out) Allow Kekulé structures f...