9626_m21_qp_12
A paper of Information Technology, 9626
Questions:
13
Year:
2021
Paper:
1
Variant:
2
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1
There are many internal hardware devices in a typical personal computer. Tick the most accurate statement referring to hardware. ✓ There are two types of hardware: application hardware and system hardware. Hardware consists of the programs used to direct the operation of a computer. Hardware is the collection of physical components that constitute a computer system. A device driver is an example of an item of hardware. RAM is an example of an item of internal hardware. Tick the most accurate statement referring to RAM. ✓ A hard disk drive allows quicker access to data than RAM. RAM is portable and very easy to move from device to device. RAM stores active program data. Per unit of memory, RAM is far cheaper to buy than a hard disk drive. Describe the components of the central processing unit and describe their function. A computer contains a number of internal hardware components. Describe the following: Motherboard Sound card
2. Hardware and software  →  2.1. Mainframe computers and supercomputers
2. Hardware and software  →  2.2. System software
Open
2
Tick the most accurate statement referring to a gesture-based interface. ✓ It is easier for users with physical disabilities to use a keyboard or mouse than make gestures. It is easier to enter text with a gesture-based interface than with a command line interface. Gestures are more accurately interpreted than mouse clicks. Some gestures may be unintentional but still initiate a reaction from the device. Tick the most accurate statement referring to a dialogue interface. ✓ Dialogue interfaces are more difficult to use than command line interfaces. A dialogue interface uses less memory than a command line interface. A dialogue interface may not operate reliably if there is background noise. Dialogue interfaces have unlimited vocabularies. Many software developers use a command line interface (CL. Evaluate, by weighing up the advantages and disadvantages, a CLI compared to a graphical user interface (GU.
2. Hardware and software  →  2.5. User interfaces
Open
4
A sports club secretary has entered data from a source document into a database on his own computer. The original document contains correct data but he made some errors when copying the data into the database. Membership number is text data type and Membership fee paid is currency. Membership number Date of birth Membership fee paid ($) Membership number Date of birth Membership fee paid ($) 13/04/1996 13/04/1996 09/12/1998 09/12/1998 12/11/1992 12/12/1992 01/02/2001 01/02/2001 27/06/1999 27/06/1999 Source document Database The three errors were: 15 has been copied as 5 34859 has been copied as 3485 12/11/1992 has been copied as 12/12/1992 Explain, in detail, why one of the errors could only have been detected using verification. Describe the most appropriate method of verification that could be used to trap this error. For each of the other two errors, describe the most appropriate validation check which would have trapped the error.
1. Data processing and information  →  1.4. Checking the accuracy of data
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