a) What is a computer network topology?
Arrangement of computers on a network
b) Using appropriate diagrams, show any three computer network topologies
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A computer Vendor has recommended the use of a computer database to your
school for student information a) Explain to the Board of Governors what a database is an its functions (5mks)
A database is a shared collection of logically related data (and a description of this data) designed to meet the information needs of an organization.
Functions of a database
i) State one area where computers are used. (2 mks)
A multinational organization has offered to donate computers to your school. The Board of governors has requested you to advise on the operating system to be used by providing answer the following questions.
Logo of Ubuntu operating system
a) What is an operating system? (1mk)
System software that controls the computer system (hardware and other
application software) b) State and briefly explain an two types of operating systems. (6mks)The roots of the equation ax2 +bx + c= 0 are by the formula
a) Draw a flowchart to compute the roots of the equation. (10 mks)
Types of data entries that may be input into a worksheet cell
What is relational database?
This is a database where records are structured within tables (relations)
A relational database is a type of database that stores and provides access to data points that are related to one another.
Relational databases are based on the relational model, an intuitive, straightforward way of representing data in tables. In a relational database, each row in the table is a record with a unique ID called the key. The columns of the table hold attributes of the data, and each record usually has a value for each attribute, making it easy to establish the relationships among data points. 
Worksheet cells are referenced using the column letter and row number e.g. D2 is cell in column D and row 2.
a) Write down the data type that is stored in cell C5 (1mk)
b) What cell contains the data items representing transport for the month of February?
c) Write down the formula that may be used to compute the total in cell f6.
What is program documentation? Give two examples of program documentations.
This refers to information that serves to explain the purpose of a program.
Documentation may be internal in the form of comments and appropriate named variables and constants e.t.c. or may be extended in the form of a written description and structure diagram. E.g. user oriented and program oriented. 
Differentiate between the hardware and software components off a computer giving an example of each21/12/2020 Differentiate between the hardware and software components off a computer giving an example of each
Features of word processor
There are two categories of word processor features namely:
Types of Storage Devices Used By a Computer Giving an Example of Each
Introduction;
There are various categories under which storage devices can be classified;
HARD DISK DRIVE
Precautionary measures considered to ensure the safety of computers in a computer laboratoryThe Keyword Here Is 'Safety'
Safety here means, a condition or a measure taken to protect computers from unlikely damage, risk, danger or burglary.
Computer Desk (picture courtesy of pinterest)
DEFINE THE FOLLOWING TERMS; 1)FILE; 2) RECORD; 3) FIELD
A file, record and a field are database terms used especially when dealing with tables.
What is a file
A file is a collection of records, database files organize the data into records and fields.
1. inputThis is the ability for a computer to accept data either through input devices such as scanners, keyboards, mice and others or through information retrieved from storage devices. Input of data is a main function because all other functions depend on the incoming data for processing and output.  Functions of a Computer 2. processingProcessing and storage are sometimes broken down as separate basic functions of a computer. However, looking at this critical idea keenly, we notice that processing and storage are sometimes inseparable this is because processing devices rely heavily on storage devices vis a vis. Processing is an act where a computer converts raw meaningless piece of information called data into a more meaningful piece of information. This is normally done with a closer help of primary storage devices such as the RAM, and special types of memories such as the registers, buffers and cache memory. Processing is a main function of a computer because of the conversion, manipulation of numeric data and logical decisions. 3. OutputThis is an act for a computer to display the result of a processing activity. This can be done using output devices such as the monitor, printer, plotter, speakers etc.
The functions of a computer system cannot be complete without the output, simply because it gives a feedback of the result for the computer user to digest, change, amend, store or print. |
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