X206/11/01 X206/11/01 COMPUTING INTERMEDIATE 2 NATIONAL QUALIFICATIONS 2015 WEDNESDAY, 6 MAY 9.00 AM AM

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1 X06//0 NATIONAL QUALIFICATIONS 05 WEDNESDAY, 6 MAY 9.00 AM 0.30 AM COMPUTING INTERMEDIATE Attempt Section I and Section II and one Part of Section III. Section I Attempt all questions. Section II Attempt all questions. Section III This section has three parts: Part A Artificial Intelligence Part B Computer Networking Part C Multimedia Technology Choose one part and answer all of the questions in that part. Read each question carefully. Write your answers in the answer book provided. Do not write on the question paper. Write as neatly as possible. Answer in sentences wherever possible. HTP *X06//0*

2 SECTION I Attempt ALL questions in this section.. Below is a list of memory capacity units in order of size: bit X Kilobyte Megabyte Y (a) State the memory capacity unit at X. (b) State the memory capacity unit at Y.. Convert the binary number 00 into a decimal number. 3. Explain why floppy disks are not a suitable medium for storing photographs. 4. State one type of server that could be used within a computer network. 5. Explain one possible reason why your computer would unexpectedly shut itself down. 6. State one benefit of networking computers. 7. Name the part of the processor that temporarily stores data. 8. A program has been written to calculate the average of five percentages. State two suitable examples of extreme data that you could use to test this program. 9. Describe one method of improving the readability of a computer program. 0. Explain why most computer programs are written in high-level languages rather than machine code. [X06//0] Page two

3 . Describe what is meant by a nested loop.. Describe the purpose of the Input validation standard algorithm. 3. Name the first stage of the Software Development Process. (5) [end of section i] [Turn over [X06//0] Page three

4 SECTION II Attempt ALL questions in this section. 4. Customers at Caffé Italia are given one credit on their Coffee Club Card when they buy two or more drinks. Customers with nine credits are entitled to a free coffee. Customer Code Free! (a) From the Coffee Club Card, identify one object and one operation that may have been carried out on the object. (b) The images of the coffee cups are stored as bitmaps. Explain how black and white bitmapped graphics are stored in a computer s memory. [X06//0] Page four

5 4. (continued) (c) The tills in Caffé Italia are programmed to record sales data. Part of the design for one of the programs is shown below.. ask for the number of drinks. get the number of drinks.3 if drinks >= then.4 add one to total credits.5 end if (i) Using a high level language with which you are familiar, write program code for step.4 of the design. (ii) State the variable type that should be used to store the total credits. (iii) A complex condition is used to decide if a customer is to be given a free coffee. Customers must have at least nine credits. The offer is not available on Sundays. Complete the following complex condition. IF (d) Regular customers receive news of special offers by . THEN display Free Coffee. State the most efficient way for Caffé Italia to send news by to all its customers. 3 (0) [Turn over [X06//0] Page five

5. CodeKing has launched an online programming course. (a) Students can download course information from the website. This file is saved using a standard file format.

6 5. CodeKing has launched an online programming course. (a) Students can download course information from the website. This file is saved using a standard file format. Explain why a standard file format is used for this file. (b) Students must install anti-virus software before starting the course. Describe one function of anti-virus software. (c) The website gives details about the computer system needed for the course. (i) Explain what is meant by a 3.3 GHz processor. (ii) The MAXIX 7.0 operating system provides the Human Computer Interface for the user. State one other function of the operating system. (iii) Explain why the computer system requires both RAM and backing storage. (d) Name the legislation that requires CodeKing to keep students details private. [X06//0] Page six

7 5. (continued) (e) The first lesson introduces students to program design. One design notation is shown below. Software Development Unit Design Notations The way of representing the program design is called the design notation. The programmer has a choice of design notations. Design Notation Process rainfall data Input and store rainfall data Calculate total and average rainfall Display total and average rainfall (i) Name the design notation shown. (ii) State one other design notation. (f) Students make use of an interpreter rather than a compiler for translating the program code. State one reason why an interpreter would be a better option for the students. (g) Students make use of a text editor. State one use of a text editor at the maintenance stage of the software development process. (0) [Turn over [X06//0] Page seven

8 6. CycleSaver is an application for palmtop computer systems that allows cyclists to record their track performance at the velodrome..48 PM yclesaver Lap Number: Average Speed: (km/hour) Fastest Lap: (km/hour) Dmitry Yashkin/Shutterstock My Profile (a) A program calculates the average speed for cyclists that complete 0 laps. Part of the design for this program is shown below.. loop 0 times. get lap time.3 add lap time to total time.4 end loop.5 calculate average speed.6 display average speed Steps. and.4 are the beginning and the end of a fixed loop. Explain why a fixed loop is used here. (b) The program displays the speed of the cyclist s fastest lap. Name the standard algorithm that is used to work out the cyclists fastest lap speed. (c) The average speed is displayed as km/hour. Describe how a real number like is stored in the computer. (d) State the data structure that is used to store the speed for each lap. [X06//0] Page eight

9 6. (continued) (e) A pre-defined function could be used to calculate the cyclist s average speed. Explain what is meant by the term pre-defined function. (f) The cycling data on the palmtop computer system is transferred to a desktop computer system. (i) State one reason why an interface is needed for this task. (ii) State one optical storage medium that would be suitable for storing a back up copy of the cycling data. (g) The CycleSaver application includes a heart rate monitor. Cyclists check that the heart rate monitor works as expected. Name the stage of the software development process that is being carried out. (h) The software takes up 8.6 Mb of memory. Name the item of documentation that will contain this information. (0) [END OF SECTION II] [Turn over [X06//0] Page nine

10 SECTION III Attempt ONE part of Section III Part A Artificial Intelligence Page Questions 7 to 9 Part B Computer Networking Page 4 Questions 0 to Part C Multimedia Technology Page 7 Questions 3 to 5 Choose one part and answer all of the questions in that part. [X06//0] Page ten

SECTION III Part A Artificial Intelligence Attempt ALL questions in this section. 7. A computer game and an expert system can be accessed from the BrainTrain website.

11 SECTION III Part A Artificial Intelligence Attempt ALL questions in this section. 7. A computer game and an expert system can be accessed from the BrainTrain website. (a) The BrainTrain computer game makes use of artificial intelligence. (i) Name one example of an early computer game that demonstrates artificial intelligence. (ii) Describe one way in which artificial intelligence has helped to improve computer games like the BrainTrain game. (iii) Name the legislation that makes it illegal to make copies of BrainTrain. (b) The Turing Test can be used to determine if a computer program is intelligent. Describe the Turing Test. (c) The website s expert system gives advice on healthy eating and exercise. (i) State two advantages of using this expert system rather than a human expert. (ii) State one legal issue to the company of providing access to this expert system. (8) [X06//0] Page eleven [Turn over

12 8. RoboRescue is an intelligent robot that has been developed for use in areas hit by earthquakes. (a) RoboRescue is able to locate survivors trapped in collapsed buildings. (i) Explain why an intelligent robot is used for this task. (ii) Suggest one appropriate sensor that could be used by this robot. (b) RoboRescue interprets images of the disaster area. State the area of artificial intelligence that is being used for this task. (c) RoboRescue can respond to instructions given in English. (i) State one task that will need to be carried out before the speech recognition software can operate. (ii) Name one problem that could affect the accuracy of the speech recognition software. (d) An artificial neural system can be used to predict when earthquakes are likely to occur. Explain why an artificial neural system would be suitable for this task. (6) [X06//0] Page twelve

13 9. SmartApps allows users to select applications for their smartphones. The knowledge base contains facts and rules about applications on offer. is_a(eatme, healthapp) (Eatme is a health application) is_a(runsaver, healthapp) 3 is_a(takeoff, travelapp) 4 new_release(runsaver) (Runsaver is a new release) 5 new_release(takeoff) 6 rating(eatme,4) (Eatme has a rating of 4) 7 rating(runsaver,8) 8 rating(takeoff,9) 9 free_download(x) if new_release(x) (X is a free download if X is a new release) 0 recommend(x) if rating(x,y) and Y>7 (X is recommended if the rating of X is Y and Y is greater than 7) (a) (i) State the result of the following query:?is_a(takeoff,healthapp) (ii) State the first result of the following query:?free_download(x) (b) Using the numbering system to help you, trace how the system will evaluate the query:?recommend(x) as far as the first solution. (c) SmartApps updates the knowledge base to include the facts below about a new application. News47 is a news application that has a rating of 8. (i) Write the two facts that should be added to the knowledge base. (ii) Name the stage of the software development process at which the knowledge base will be updated. (d) The knowledge base was written in a declarative language that uses depth-first search. Describe what is meant by a depth-first search. You may use a diagram to illustrate your answer. 4 () [END OF SECTION III PART A ARTIFICIAL INTELLIGENCE] [X06//0] Page thirteen [Turn over

14 SECTION III Part B Computer Networking Attempt ALL questions in this section. 0. Jamie and Delia run a successful cake business. They have decided to start selling their cakes online. (a) Explain why they need an Internet Service Provider (ISP). (b) They have been advised to set up an ADSL connection. (i) State the type of connection ADSL uses. (ii) State one advantage of using ADSL compared to ISDN. Jamie is very excited about their online business and s his friend: Tony At last we are online! Our website is Regards Jamie The Internet business is great! My password is XTve334! Check us out. (c) State two rules from the code of conduct Jamie has broken in his . Delia uses a desktop computer to create a video to demonstrate baking techniques. (d) State one other hardware device Delia would require to create the video. (e) Explain how a new customer might find Jamie and Delia s web-site. (7) [X06//0] Page fourteen

15 . A detective agency advertises its services online: Hyperlinks are used in the web page above. (a) State the function of a hyperlink. (b) Name the type of software that customers would use to access the website. (c) The detective agency wanted to use a different URL but was informed that they could not use this URL. Explain why the company was refused permission to use this URL. (d) The detectives need to send updated reports of investigations to their boss electronically. State one way in which they could send these reports securely. (e) The detective agency has been given permission to monitor phone, web and content for a particular investigation. (i) Name the legislation that allows monitoring of phone, web and content. (ii) State one other feature of this legislation. (f) The detective agency use multicast or unicast transmission between employees. Explain why the use of broadcast would not be appropriate for the detective agency. (g) Each detective uses a remote digital microphone which can send data to their mobile phones. Name the communication method used by these devices. (8) [X06//0] Page fifteen [Turn over

16 . An energy company logs phone calls made by employees. An example is shown below: Employee Number 34 Date 08/04/5 Start time 0:03:07 (a) State the most appropriate application package that could be used to log all phone calls. (b) The energy company make use of e-commerce to provide customers with a 4 hour service. (i) State what is meant by e-commerce. (ii) State one service that could be provided by this company through e-commerce. (iii) Apart from the 4 hour service, state one other advantage to the customer of using e-commerce. (c) State why each employee is given a username and password. (d) Explain how the company could stop employees from accessing social networking sites. (e) Explain how the company could back-up their customer data. (f) State one example of a hardware failure that may cause the company s network to crash. (0) [END OF SECTION III PART B COMPUTER NETWORKING] [X06//0] Page sixteen

17 SECTION III Part C Multimedia Technology Attempt ALL questions in this section. 3. A graphic novel company creates a new character for its comic: (a) The graphic designer uses a D vector graphics package to ensure resolution independence. (i) Explain what is meant by the term resolution independence. (ii) State one other feature of a vector graphic. (iii) Name a suitable D vector graphic format. (b) The graphic is ready to be displayed on a computer system with a LCD monitor. State the hardware required to display this graphic. (c) A 3D image of the character is produced for an advertising campaign. (i) Name a suitable 3D vector graphic format. (ii) State one disadvantage of using a 3D vector graphic compared to a D vector graphic. (d) The graphic designer used macros when creating the D graphic. State one benefit of using macros. (7) [Turn over [X06//0] Page seventeen

18 4. A photographer has set up a business to produce high quality photo albums and videos. The photographer uses bitmap editing software to edit parts of photographs such as red eye. (a) Explain why bitmap editing software is suitable for removing red eye from photographs. (b) The photographs are saved in bitmap format. However, the file sizes are large. (i) Name one file format that could be used to solve this problem. (ii) Explain how this file format solves this problem. (c) After changing the file format, the photographer has noticed that the file sizes are still too large. Name one other technique the photographer could use to reduce the file size. (d) When recording video, the photographer has selected a frame rate of 5 fps rather than 5 fps. (i) State one advantage of capturing the video using 5 fps. (ii) State one disadvantage of capturing the video using 5 fps. (e) The video can be saved as a standard file format. Name a standard file format for video. (f) The photographer uses authoring software rather than a text editor to create multimedia applications. (i) State one benefit to the photographer of using authoring software. (ii) Explain why using a text editor could be a problem for the photographer. (g) The photographer wants to upgrade to a digital video camera with WiFi. State one advantage of having WiFi available on a digital video camera. (0) [X06//0] Page eighteen

19 5. A recording of an open air concert is saved for online release. (a) Name one item of hardware that could be used to capture sound. (b) State one reason why the file would be saved as an MP3 rather than WAV. (c) Part of a drum sound file is shown below: Describe what is happening in the sound file above. (d) Some musicians use MIDI keyboards during the concert. (i) State one attribute of a note that could be edited using MIDI. (ii) State one reason, apart from editing notes, why a musician would use a MIDI keyboard at a live concert. (iii) State one disadvantage of using a MIDI keyboard at a live concert. (e) One fan downloads the music onto his computer system but cannot hear the music. State two hardware reasons why the music cannot be heard. (8) [END OF SECTION III PART C MULTIMEDIA TECHNOLOGY] [END OF QUESTION PAPER] [X06//0] Page nineteen

20 ACKNOWLEDGEMENTS Question 5 Olaru Radian-Alexandru/shutterstock.com Question 6 Dmitry Yashkin/shutterstock.com Question 7 Arcady/shutterstock.com Question Poul Carlsen/shutterstock.com Question 3 Pushkin/shutterstock.com Question 5 Noel Powell/shutterstock.com

X206/201 COMPUTING INTERMEDIATE 2

X206/201 COMPUTING INTERMEDIATE 2 X06/0 NATIONAL QUALIFICATIONS 009 THURSDAY, 4 JUNE 9.00 AM 0.30 AM COMPUTING INTERMEDIATE Attempt Section I and Section II and one Part of Section III. Section I Attempt all questions. Section II Attempt