Information Technology Memo 2 (English)

November 2018 — Grade 12 / Matric — Information Technology

Memo 2018 Grade 12 English

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Q1— Section header —

1.1.1(1\

1.1.2(1\

1.1.3(1\ Faulty question no possible answer

1.2CMOS (Also accept BIOS , Firmware (1\ Biometrics Bio authentication/ Any specific correct example such as Voice recognition, Face/Iris/

Q2— Section header —

2.1Any TWO Portable/could walk around to the tables and take orders Small in size/easy to fit into hand No cabling/Wireless/ Can link to system using Wi Touch screens make selecting options quick easy to use

2.2.1Any TWO hardware components CPU /Processor Hard drive /storage emory/RAM Motherboard (2\

2.2.2Any TWO actions for disk cleanup Deletes the temporary internet files Empties the recycle bin Deletes any other temporary files Deletes downloaded files Debug dump files Delete setup log files

2.3Any TWO comparisons between cache and RAM Cache faster than RAM Cache has smaller capacity than RAM

2.3The device driver facilitates communication between the computer and the printer/hardware The device driver allows the operating system /computer to

2.3To license the use of the software/ prevent illegal copies of software from being used Make all/licensed features of the software available (1\

2.3.4(a\ Any ONE advantage of nstalling updates: Always have latest functions /features Bugs and problems are esolved

2.3.4(b\ Any ONE disadvantage of installing updates automatically: Unexpected/unplanned use of data A hastily released update may ca use more problems than it

2.3.5(a\ When RAM fills up/is full (1\

2.35 (b\ The operating system makes use of hard drive space as extra RAM Uses dedicat area on HDD /storage Moves unused data to HDD

2.4Any ONE Physical damage Power surge Also accept examples of physical damage such as dropping a can cause a hard drive head crash while transporting/Spilling

2.4.2UPS /Invertor (1\

2.4.3Backup A duplicate copy of a file is created on anothe r device for use when the original copy is damaged or lost Archiving: Less frequently

2.4.4Monitors communication with computer/system and the internet /other networks and blocks unauthorised communication by software/malware

Q3— Section header —

3.1Any TWO advantages of networks Fast and efficient communication Centralisation of data /data always up to date Transfer of files between devices

3.2.1NIC is used to encode or convert the data so that the data can be transmitted over a specific medium and it decodes the data that is received. Concepts: Decode/Encode aking communication between devices possible

3.2.2Radio waves

3.3.1Fibre Optic cables (1\

3.3.2eason and explanation for addressing poor signal strength A device/technique with a valid explanation Also accept Any TWO of the following Provide s

3.3.3Any TWO reasons for using WiMax Greater range Faster /faster communication Provides higher bandwidth /data transfer Better security (2\

3.4.1The Semantic Web refers to a web where the content has been optimised for computers and devices to filter content intelligently to be able to navigate without human intervention or involvement Concepts:

3.4.2Any ONE reason for using metadata To supply additional data on which specific searches are done. Searching is optimised Improved results Accept any explanation that metadata is used to improve results on

3.5.1POP3 (1\ Notification The user is notified by a sound or message that a new e mail has arrived Push Technology

3.5link /folder is shared with another user Concepts for making large files available Folder/ Link provided

3.5.4(a\ Phishing is a technique to obtain personal/ sensitive information from a user that appears to b e from a legitimate institution

3.5.4(b\ Any ONE example of phishing Request to confirm bank details Request to provide pin number for bank cards Request to confirm user name and provide passwor Request personal information (1\ TOTAL SECTION C:

Q4— Section header —

4.1Any ONE example of the role of a database in a POS When a transaction takes place, the database is updated to increase or reduce the stock items /items available /Relevant data obtained at POS is stored for the restaurant

4.2(a\ Any ONE String Text (1\

4.2.1(b\ Any ONE Boolean YesNo True/False (1\

4.2.2The table will be sorted according to initial and not surname. The waiter s initial and surname are captured in one field/Initials captured as the first section of the initial and surname field. (1\

4.2.3tblJobCard JobCardNr (a\ NormalHoursWorked WeekStartDate (b\ HoursOvertime (b\ WaiterID

4.2.4One Waiter has many Job cards Mark allocation Correct ER diagram format One (Waiter\ to many (Job_Card\

4.3.1Any ONE issue that threatens physical integrity Power failure Natural disasters Mechanical failure of hardware Theft of devices

4.3Any TWO aspects to ensure logical integrity Data validation /validation rules Each record has a unique primary key Normalisation rules applied Ensuring referential integrity oreign key

4.4Any THREE responsibilities of a database administrator Design the database Security of the database /access rights Backup and restoration plans and policies /updating software Monitoring the performance of the database

4.5TWO benefits of having a s erver DBMS: Managing simultaneous multiple connections to the database to execute the transactions/It will allow a large number of users to connect simultaneously to a database

4.6.1Any ONE reason for security Data is transmitted across networks Multiple servers are used/Many systems are used Create security exposure on multiple fronts /many users (1\

4.6.2Any ONE benefit of working with a distributed database Faster performance /less congestion Less downtime If connection is i nterrupted, database is not damaged/corrupted (1\

4.6Partitioning: Each site manages its own part of the database and uploads data to a central database in a scheduled batch process. Concepts: Local data Uploaded to central database (2\ OTAL SECTION D:

Q5— Section header —

5.1.1Any TWO guidelines for readable code Commenting of code Descriptive variable names Modularity Indentation Open lines between sections

5.1An algorithm is possible solution to a problem which contains a set of steps /instructions Concepts: Set of steps/instructions

5.1(a\ Debugging is the technique/ process of finding and resolving defects problems /errors/bugs.

5.1(b\i\ untime error is an error that c auses termination or break in the running of a program

5.1(b\ii\ Any ONE example of runtime error ivision by 0 Data type mismatch/typing in a word instead of a number Reference to a index

5.1.4

5.1Statement 1: variable X := 5 mod 2 Integer /Real/Any number type Statement 2: variable Y := 5 mod 2 = 0 Boolean 12

5.2Creates a link between the external /physical/textfile file and file variable /logical file in the program

5.2.2Any ONE reason for replacing append with rewrite The file will be emptied/ the contents will be removed Rewrite statement will replace /overwrite the current contents of

5.2Any ONE reason for I/O Error: The file was not closed in during a previous procedure/The file buffer was not cleared /The file is corrupt The file was not correctly assigned Append or rewrite was not used to open the file/Reset was used

5.3.1Is x < 1? Is c <>5 Display

62.3False

6.23False

0.62True True Error in PIN No extra details 12/2

5.3.2Any ONE of c = 5 The user must enter a pin number w hich contains 5 digits (1\ 13

5.4Marking Concepts: 1 mark nner loop mark Loop to correct counter 1 mark ormulate a display

Q6— Section header —

6.1.1area where wireless /Wi Fi/ nternet access is available connected/

6.1.2encrypted data/files that are sent can be intercepted ny other acceptable example of personal information being exposed /hacking/ threat of malware

6.1.3(a\ A peer protocol /network for downloading files from the internet A file sharing software (1\

6.1.3(b\ Any TWO reasons to block BitTorrent Security issues o prevent piracy of software Data use/Data cap Congestion/Slow down performance of network (2\

6.2Virtual Private Network (1\

6.2Allows users to log into a network via the internet with the same security of a LAN. Concepts: Any TWO Log in via Internet Remotely Secur ed network /connection

6.3(a\ Dynamic page Any ONE motivation: Additional parameters are included that provide information to the software on the server in order to

6.3.1(b\ Any ONE for a mobi website Ends with .mobi M prefix (2\

6.3(a\ Any TWO hints to use less power Turn off devices when not in use Change screen settings to dim Use automatic app that puts apps to sleep Close unnecessary apps

6.3.3SEO/ Search engine optimisation (1\

6.4Many bot computers are used to bombard he servers hosting the restaurants website with a large number of requests the servers are over loaded and cannot respond so the website becomes unavailable

6.6Any TWO roles played by people in data mining process Select /gather/ prepare data sets Interpret /reporting

6.6To identify hidden trends that can be used to make management decisions for example purchasing more stock

6.7Do not need internet access to use the software. (1\ TOTAL SECTION F GRAND TOTAL

Topics Identified

Word ProcessingDatabasesProgrammingNetworkingHardware

Paper information

SubjectInformation Technology

Year2018

SessionNovember

TypeMemo

PaperPaper 2

LanguageEnglish

Pages17

Downloads4

Examination context

Decade2010s

Years ago8y

SeasonSpring (SH)

Start dayMonday

Exam periodNovember 2018

Days since exam2,910

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