PROVINCIAL EXAMINATION

Transcription

1 PROVINCIAL EXAMINATION INFORMATION TECHNOLOGY PAPER 2 JUNE 2015 GRADE 10 MARKS: 150 TIME: 2 HOURS This paper consists of 11 pages Page 1 of 11

2 INSTRUCTIONS AND INFORMATION: 1. Tear off the last page and use as answer sheet for Section A. 2. Write neatly and readable. 3. Number question precisely as on the question paper. SECTION A QUESTION 1.1. [15] Complete the cross word puzzle by giving the necessary terminology for each of the following. 1. The type of software used for productive work and to accomplish specific tasks. 2. The type of software used to control and maintain your computer. 3. This port connects devices for fast data transfer. 4. The process of getting two sets of the same data files on two different devices updated with the latest copy of the file. 5. A modem we use for high speed data transfer over digital telephone networks. 6. Give the acronym for the electronic circuit board with RAM on. 7. The programs that are part of system software and do maintenance and administrative tasks and are installed with the operating system. 8. This number system consist out only 1 and 0 9. The type of Copyright law which allows people to use and distribute work whilst still allowing the creator some control over where and how it can be used. 10. The study of the human body to try to design products so they better fit the way that we actually function. 11. An error condition that occurs when there are not enough bits available to represent an integer value accurately. 12. The sequence of folders that load to the location of a specific file. 13. This type of file is used to distribute document files. You need Adobe Reader to read it. 14. It refers to the number of pixels used to form the screen image. 15. Most peripheral devices (e.g. printers) connect to the computer through this type of port. Page 2 of 11

3 QUESTION 1.2. [10] Say if the following statements are TRUE or FALSE The processor allows the computer to keep instructions and data that it is not currently working on, so that they can be accessed and used when needed Data mining is how to process and analyse data looking for valuable information that you did not even know was there Each programming has variables that we declare or use to store its associated data. Each data type offers a variety number of bytes as determined by the programming language A.jpg file can be imported by most programs such as MS Word Buying one software license and installing it on multiple computers are legal An algorithm is a sequence of steps that can be followed in order to solve a specific problem Accelerometers are the sensors in smartphones that allow you to control games and do things like undo or skip this song simply by shaking your device Speaker and headphones are the devices most commonly used to obtain output from the computer The quality of the sound that a computer produces depends on the sound card and available mixing boards ios and Android Operating systems are used for mobile devices. Page 3 of 11

4 SECTION B Mpho is a new learner to the school and has chosen IT as one of his subjects. IT was never offered to Mpho at his previous school so he is aware that he has a lot of catching up to do. He bought a laptop computer so he is able to practise his computer and programming skills at home. He has also asked you to help him and show him more about computers and programming. QUESTION 2: BASIC CONCEPTS OF COMPUTING. In today s society there is a variety of Information Communication Technology, e.g. Laptops, Smartphones and Tablets. 2.1 Give the definition of a computer. (4) 2.2 BTF 179 MP is an example of (Data/Information) (1) Give the difference between dedicated devices and general purpose computers. (2) Give an example of each. (2) 2.4 Data must also be in the memory of the computer to work with it. Give the definition of memory. (2) 2.5 Software are categorised by their functions What type of program allows you to perform tasks based on calculations? (1) What type of program add extra features to software? (1) Give an example of a Database program. (1) Give an example of a Graphics and Design program. (1) What type of program combine text, sound and graphics, including animation into a presentation? (1) 2.6 Linux is an example of open source software Give a description of what Open source software is. (2) Give two advantages of Open source software. (2) Give two disadvantages of Open source software. (2) What is the main difference between open source software and Proprietary software? (1) 2.7 What influences or determine the processing power of a computer? (3) 2.8 Give a description of a Server. (2) 2.9 What is the difference between a Consumer tablet and a Tablet PC in terms of cost and battery life? (2) Page 4 of 11

5 2.10 Why do we use computers? Name FIVE reasons. (5) 2.11 Give five disadvantages in using computers. (5) [40] QUESTION 3: BASIC CONCEPTS OF HARDWARE AND INTEGRATED SCENARIO. 3.1 Consider the specifications given in the following advert for a monitor and a computer and answer the questions that follow: COMPUTER: MONITOR: 21.5 Wide LED Backlight Display 1920 x :1 Contrast Ratio 300 Nits 2 ms response time VGA. DVI-D & HDMI inputs 3 Year Warranty Clearly explain what the 21.5 specification refers to. (1) The monitor is listed as a wide display. Explain what this means and give TWO benefits of a wide screen for the user (2) Clearly explain what the 1920 x 1080 specification refers to and why this would be important for a user. (2) To what does the 2ms response time refer to? (1) What does the contrast ratio -specification refers (2) In the advertisement of the computer they refer an Intel Pentium 4 processor What is the function of the central processing unit in a computer? (1) What is the function of a fan at the central processing unit? (1) In what unit are a central processor s speed measured? (1) The 512Mb DDR RAM refers to the memory of the computer. Name THREE characteristics of memory. (3) The advertisement refer to two secondary storage devices. Name them. (2) The printer is advertised as having Bluetooth technology Name ONE advantage of this technology. (1) Explain how this could be of any benefit to Mpho getting access to textbook information and revision exercises. (1) Page 5 of 11

6 3.2 To what does the term Hard copy refer to? (1) 3.3 What is special about SSDs (Solid State Drives)? (2) 3.4 What is the advantage of a LED monitor over a CRT monitor? Name 3 (3) 3.5 Besides optical scanners that use light to read images, you also get other types of scanners. Name three. (3) 3.6 Why is a PC Tablet more ideal for someone who creates Digital Arts? (1) 3.7 What is the function of DTD s (Data Terminating Devices) (2) 3.8 What type of ports will be used to transfer data from a video camera to your computer? (1) 3.9 What connection port provides users with the fastest external connection currently? (1) 3.10 FIT THE PICTURE OF THE SPECIFIC PORT IN COLUMN B TO THE CORRECT TERM IN COLUMN A, E.G. 1 C: (4) COLUMN A COLUMN B FIREWIRE A RJ-45 B Sound C. Page 6 of 11

7 VGA D. [37] QUESTION 4: BASIC CONCEPTS OF SYSTEM SOFTWARE 4.1 Name FOUR functions of an Operating system (4) 4.2 How does embedded OS differ from those installed and used on a general purpose PC (1) 4.3 By using a graphical user interface, and allowing people to work with the Computer by pointing instead of typing out command words, computers are more intuitive and natural to use. Name THREE aspects or characteristics of a GUI. (3) Choose one answer: ( ) 4.4 (Label / Radio button / List box / Combo box) allows the user to choose only one from a given (small) set of options (1) 4.5 (Label / Radio button / List box / Combo box) allow the user to enter an option of their own (1) 4.6 (Label / Radio button / List box / Combo box) force the user to only choose from the options listed (1) 4.7 Name TWO examples of Utilities software (except Compression software) that perform system maintenance and administrative tasks. (2) 4.8 Name an example of a compression software program (1) 4.9 What is the function of a software driver? (1) QUESTION 5: INFORMATION MANAGEMENT [15] 5.1 Why is it not a good idea to change the file extension? (1) 5.2 Give TWO limitations that some Operating systems place on file names.2) Page 7 of 11

8 5.3 Complete the following diagram. (3) Programming language 5.4 Give TWO advantages of DLL files. (1) Convert the following binary number to a decimal number, showing all your calculations Convert the following hexadecimal number to decimal, showing all your calculations Convert the following decimal number to a binary number Convert the following decimal number in hexadecimal notation (2) (2) (2) (2) QUESTION 6: SOCIAL, ETHICAL AND LEGAL ISSUES SURROUNDING ICT S 6.1 What is the acronym EULA for? (1) 6.2 Explain what is meant by the term digital devide, and list the factor that contributed to her falling victim to the Digital Divide (2) 6.3 Now that you have access to an Internet Connection, you can keep in touch with friends and family much more easily. List and discuss two ways in which e-communication has change the way people communicate today (4) 6.4 In preparing examination papers the teacher has been spending long hours working with the computer. a. What are TWO possible adverse effects of working on a computer for long hours without taking breaks? (2) b. Suggest TWO ways to avoid these adverse effects mentioned. (2) Government supports Green Computing. a. Explain the concept Green Computing. (2) b. Describe two ways in which you can practice Green Computing. (2) [15] [14] Page 8 of 11

9 QUESTION 7: ALGORITHMS 7.1 Look at the Algorithm and complete : Begin Ask the length of the room Get RoomLength Ask the width of the room Get (7.1.1) (1) Ask a tile side Get TileLength RoomArea = (7.1.2) x (7.1.3) (2) TileArea = sqr(tilelength) Boxes = round(roomarea / TileArea) Cost = 60 x Boxes Display message : You will need, (7.1.4), of tiles and it will cost you R, (7.1.5) (2) [5] Grand total: [150] Page 9 of 11

10 QUESTION 1 NAME AND SURNAME: Question 1 - CROSS WORD PUZZLE R 10 Page 10 of 11

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12 GRADE 10 INFORMATION TECHNOLOGY JUNE 2015 TOTAL: 150 PAPER 2 TIME: 2 HOURS MEMORANDUM SECTION A QUESTION 1.1. [15] Application software System software Firewire Synchronise ADSL DIMM Utilities Binary Copyleft Ergonomics Overflow PATH PDF Resolution USB QUESTION 1.2. [10] Say if the following statements are True or False False True False True False True True False False False 1

13 SECTION B QUESTION 2: BASIC CONCEPTS OF COMPUTING A computer is a multipurpose electronic tool that can receive data (input), can process the data, can produce results and can output them. (4) 2.2. Information. (1) Dedicated devices are designed to perform one task only.. General purpose computers can perform more than one function, by having different types of programs loaded on the respective devices.. (2) Dedicated= washing machine, robots, microwaves. General computers= cell phones and computers. (2) 2.4. Memory is the place where the computer temporarily stores those sets of instructions and data it is currently working with. (2) Spreadsheet. (1) Plug-ins. (1) Microsoft Access / OpenOffice Base / MySQL (1) CorelDraw / Adobe Photoshop / Adobe Illustrator / Macromedia Freehand / AutoCAD / Microsoft Paint. (1) Presentation software. (1) Open source software is software made available with a license that allows you to access and modify the source code, but not to sell the software. (2) No cost / low cost (usually free) Access to source code Freedom to adapt and change the software to suit your own need. Access to a community of users /support. (2) No one to hold responsible for glitches and shortcomings in the Software. Risk of poor support. Higher skills needed if you want to use this model to its fullest potential Various varieties of the same software can arise. (2) Proprietary software don t get the source code. (1) 2.7. Speed of the CPU Amount of storage Size of memory (3) 2

14 2.8. Servers are powerful computers that are used in network environments to help run a network of linked computers. (2) 2.9. Tablets are more expensive and have a shorter battery life. (2) Computer: Are fast and accurate Are good at repetitive tasks Do not get tired or complain or demand increase in pay Are multy -purpose Enable faster communication Are excellent at keeping records Allow for many and various methods to process and analyse data (5) Computer: Are only as good as the way they are used and the data that is fed to them Can only be used for a limited number of physical applications Can be very expensive Cannot think or solve problems Need trained and skilled programmers and operators Might need specially developed software to solve a problem (expensive) Quickly become outdated (5) [40] QUESTION 3: BASIC CONCEPTS OF HARDWARE This refers to the size of the monitor, measured diagonally in inches from one corner to the other. (1) Wide screens are much wider than they are tall the same as highdefinition TV screens. The wide screen format is useful, as you can easily view documents side by side, and it is also nice for watching DVDs. (3) This refers to the resolution of the monitor. OR The resolution refers to the number of pixels (small dots) used to form the screen image.. The resolution is measured horizontally and vertically in pixels. OR A monitor with a resolution of 1920 X 1080 will display 1920 pixels across the screen and 1080 pixels vertically ( down ) the screen. (2) 3

15 This is the time taken in milliseconds to change a pixel. (1) The contrast ratio is the measurement or of the ratio between the darkest black and the brightest white the monitor can produce the larger the ratio, the better. (2) The CPU is the part of the computer that does all the work (Processing) (1) The fan cools down and prevent the CPU from over heat. (1) GHz (1) It is volatile (it loses its contents when it has no power). It is where the CPU keeps all the data / instructions it is working on. Data transfer between RAM and CPU is fast because it is an electronic process. The more RAM you have in your computer, the better it will perform. RAM is supplied in DIMMs (Dual Inline Memory Modules) that fit into DIMM slots on the motherboard. RAM is expensive (it costs more per GB than storage) (3) Hard Disk Drive and DVD Drive (2) It connects different devices to communicate with each other without having to use cables. (1) Data can be easily transferred to his laptop. (1) 3.2. It is a copy of a document that is printed on paper. (1) 3.3. SSD s use a special type of electronic memory than can retain its data when the power is off.(the same that is used fir flash drives). They are slower than RAM, but faster than HDD or DVD s (2) 3.4. They are smaller, lighter, more efficient and cheaper. (3) D scanners Barcode scanners Magnetic stripe readers Biometric scanners (3) 3.6. It allows you to draw or paint precise detail and is far more precise and accurate than using a finger. (1) 3.7. The function is to convert signals from your computer to the type of signals that can be transmitted over a telephone line and vice versa. (2) 4

16 3.8. Firewire (1) 3.9. Thunderbolt. (1) B D 3, A C (4) QUESTION 4: BASIC CONCEPT OF SYSTEM SOFTWARE [37] 4.1. Provides an interface Process and task management Memory management Input/output management Disk management (4) 4.2. Embedded operating systems in that they are stored on internal memory Chips. (1) 4.3. The user does not have to remember or type long instructions. It uses pictures (icons) to represent programs / instructions. It uses a mouse or some other pointing device to allow the user to Interact with anything. It makes using a computer interactive. The user can come to understand it and start to use it very quickly. (3) 4.4. Radio button (1) 4.5. Combo box (1) 4.6. List box (1) 4.7. Anti-virus software Windows Explorer Disk Cleanup Defragmenter Backup (2) 4.8. WinZip (1) 4.9. They allow an operating system to communicate with and control a hardware device. (1) [15] 5

17 QUESTION 5 : INFORMATION MANAGEMENT It is generally not a good idea to change the file extension yourself as Windows may no longer recognise the file type. (1) 5.2. Max 260 characters Filename consists of the filename followed by a period (full stop) and a 3 5 letter file extension. Case sensitive (2) 5.3. Complete the following diagram. (3) Programming language Programming code e Compiler Executable program 5.4. Programs share DLL-files and it can be called by programs that are executed - It is quicker and easier to update a program (1) = 1 x + 0 x + 0 x +1 x + 1 x + 1 x + 1 x + 0 x + 0 x = (1 x 256) + (0 x 128) + (0 x 64) + (1 x 32) + (1 x 16) + (1 x 8) + (1 x 4) + (0 x 2) + (0 x 0) = = 316. (2) = (5 x ) + (E x ) + ( 8 x ) = (5 x 256) + (14 x 16) + (8 x 1) = = (2) = = 99 res = 49 res = 24 res = 12 res = 6 res = 3 res = 1 res = 0 res 1 = (2) 6

18 = = 91 res = 5 res = 0 res 5 = (2) [15] QUESTION 6: SOCIAL, ETHICAL AND LEGAL ISSUES IN ICT s 6.1 End User License Agreement? (1) 6.2 The gap between people that have access to computers and technology and people that do not. The age gap (3) 6.3. It has made communication faster/immediate. Talk to people anywhere in the world. It has made communication cheaper. Sending documents and photos are cheap. (4) 6.4. Repetitive strain injury and carpel tunnel syndrome. Take regular breaks and sit correctly in front of the computer. (4) 6.5. Green computing refers to the initiatives to design, use and dispose of technology in an environmentally or eco-friendly way. (2) Switch of computers/devices not in use. Recycle devices, refilling and reusing printer cartridges. (2) [14] QUESTION 7: ALGORITMS Begin Ask the length of the room Get RoomLength Ask the width of the room Get (7.1.1) RoomWidth (1) Ask a tile side 7

19 Get TileLength RoomArea = (7.1.2) RoomLength x (7.1.3) RoomWidth (2) TileArea = sqr(tilelength) Boxes = round(roomarea / TileArea) Cost = 60 x Boxes Display message : you will need, (7.1.4) Boxes, of tiles and it will cost you R, (7.1.5)Cost (2) [5] Total: [150] 8

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