AQA Level 3 Technical Level IT: CYBER SECURITY IT: NETWORKING IT: PROGRAMMING IT: USER SUPPORT Unit 1 Fundamental principles of computing

AQA Level 3 Technical Level IT: CYBER SECURITY IT: NETWORKING IT: PROGRAMMING IT: USER SUPPORT Unit 1 Fundamental principles of computing Level 3 Technical Level IT: CYBER SECURITY IT: NETWORKING IT: PROGRAMMING IT: USER SUPPORT Unit 1 Fundamental principles of computing Thursday 16 May 2019 Morning Time allowed: 2 hours Materials For this paper you must have: • a ruler • a scientific calculator (non-programmable) • stencils or other drawing equipment (eg flowchart stencils). Instructions • Use black ink or black ball-point pen. • Fill in the boxes at the top of this page. • Answer all questions. • You must answer the questions in the spaces provided. Do not write outside the box around each page or on blank pages. • Do all rough work in this book. Cross through any work you do not want to be marked. • If you need more space use the additional pages at the back of this booklet. Information • The marks for questions are shown in brackets. • The maximum mark for this paper is 80. There are 50 marks in Section A and 30 marks in Section B. • Both sections should be attempted. Advice • In all calculations, show clearly how you work out your answer. • Use diagrams, where appropriate, to clarify your answers. • You are expected to use a calculator where appropriate. • You are reminded of the need for good English and clear presentation in your answers. Section A Answer all questions in this section. outside the box Which logic gate reverses the input? Tick () one box. [1 mark] AND NOT OR XOR Which value is exactly 1 gibibyte? Tick () one box. [1 mark] 1000 megabytes 1000 gigabytes 220 bytes 230 bytes Machine code instructions are written in Tick () one box. [1 mark] box binary. mnemonics. structured English. symbols. A firewall does which of the following? Tick () one box. [1 mark] Examines all packets of data coming into the network. Prevents users clicking on suspicious email attachments. Stops spam from clogging up the network. Warns the network administrator about Botnet attacks. Turn over for the next question Turn over ► Python is an example of which type of programming language? Tick () one box. [1 mark] box Assembled Fourth generation (4GL) High-level Low-level Turn over for the next question box Turn over ► A disk defragmenter is an example of a utility program. box . Give two other examples of utility programs. [2 marks] Example 1 Example 2 . Explain how a disk defragmenter works and why a disk defragmenter is useful. [4 marks] Systems management software can provide notification of impending failure. Explain why notification of impending failure can be useful. box Use an example in your answer. [3 marks] Turn over for the next question *07* Turn over ► Python is an example of a programming language. Python often uses libraries of software code. box . What is a code library? [1 mark] . Explain why a code library is useful. [3 marks] . Python uses code libraries. Name another programming language that uses code libraries. [1 mark] *0* The way a mathematical expression is written can change the result when it is evaluated. Table 1 gives two expressions. Table 1 Expression 1 (7 * 3) + (9 / 2) Expression 2 7 * (3 + 9) / 2 Turn over for the next question box Turn over ► Figure 2 shows two Cray CX40 supercomputers used by the Meteorological Office for weather forecasting. The two computers run in parallel. Figure 2 box . Give one benefit of having the two computers running in parallel. [1 mark] . The two Cray CX40 computers have a combined total of 460 000 cores. State what a core is. [1 mark] . Describe why so many cores are needed in these weather forecasting computers. [2 marks] box Turn over for the next question Turn over ► Linux and Unix are two well-known operating systems. box . Describe three functions of an operating system. [9 marks] . State one difference between the Linux and Unix operating systems. [1 mark] box . There are many ‘flavours’ or distributions of Linux. Give one reason why many distributions occur. [1 mark] Turn over for the next question Turn over ► . Describe how you would change settings to allow a computer to boot from an external device. box Your description should apply to one of the following: • Basic Input Output System (BIOS) • Extensible Firmware Interface (EFI) • Unified Extensible Firmware Interface (UEFI). [2 marks] . Intel has said that BIOS will be completely replaced by UEFI on all new hardware by 2020. Describe what UEFI does that BIOS does not. [4 marks] Turn over for Section B box Turn over ► Section B Answer all questions in this section. box Ransomware is a type of malware. In 2017, an attack from WannaCry ransomware had a very bad effect on the National Health Service (NHS). The attack caused the cancellation of 19 000 appointments. . Describe what is meant by malware. [2 marks] . Name one other type of malware. [1 mark] . Explain why outdated software might allow a malware attack to happen and explain how a malware attack could be prevented. box [3 marks] Question 16 continues on the next page *17* Turn over ► . Discuss how different types of security software might be used to prevent or minimise the effects of malware attacks. box [9 marks] *1* Turn over for the next question DO NOT WRITE ON THIS PAGE ANSWER IN THE SPACES PROVIDED box Turn over ► Discuss what is important when deciding which computer to buy. Your answer should include: • the points you need to consider • the decisions you would need to make • the factors you need to think about. [15 marks] box box END OF QUESTIONS If needed, use the following pages to continue your answers. Write the question number beside your answer. box box There are no questions printed on this page DO NOT WRITE ON THIS PAGE ANSWER IN THE SPACES PROVIDED box Copyright information For confidentiality purposes, from the November 2015 examination series, acknowledgements of third-party copyright material are published in a separate booklet rather than including them on the examination paper or support materials. This booklet is published after each examination series and is available for free download from after the live examination series. Permission to reproduce all copyright material has been applied for. In some cases, efforts to contact copyright-holders may have been unsuccessful and AQA will be happy to rectify any omissions of acknowledgements. If you have any queries please contact the Copyright Team, AQA, Stag Hill House, Guildford, GU2 7XJ. Copyright © 2019 AQA and its licensors. All rights reserved.