COMPUTER STUDIES QUESTIONS WITH ANSWERS
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)
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Functions of a System Analyst
Difference between Job Scheduling and Job SequencingIntroduction
According to technopedia.com, Job Scheduling is the process of allocating system resources to many different tasks by an operating system (OS). Britannica.com has the same definition as technopedia.com. According to (Dr. John Onunga and Renu Shah 2003) K.I.E books 1 Page 156, Job scheduling involves preparing, scheduling and monitoring jobs for continuous processing by the computer system.
They explain the functions carried out at job scheduling as:
Related SearchesTypes of data entries that may be input into a worksheet cell
Point – to - point
a dedicated line of communication if first established before communication can take place
In telecommunications, a point-to-point connection refers to a communications connection between two communication endpoints or nodes.
An example is a telephone call, in which one telephone is connected with one other, and what is said by one caller can only be heard by the other. This is contrasted with a point-to-multipoint or broadcast connection, in which many nodes can receive information transmitted by one node. Other examples of point-to-point communications links are leased lines and microwave radio relay. ~ Wikipedia What meant by the term user-friendly as used in software development?
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. what are peripheral devices?
Give two examples of peripheral devices
Distinguish between transcription and transposition types of errors and give an example of each22/12/2020 Distinguish between transcription and transposition types of errors and give an example of each
What is meant by; Analogue data and Digital data
(a) Analogue data: Data that is based on physical variations such as loudness and pitch, electoral voltages
(b) Digital Data- Data, which use the computer’s binary number systems 0 and 1 Types of graphs that are supported by spreadsheets
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.
Give two differences between high-level and low-level languages
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;
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.
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.
Definition of Normalization
Normalization is the process of organizing data in a database by establishing relationships between tables according to rules designed both to protect the data and to make the database more flexible by eliminating redundancy and inconsistent dependency, insertion anomaly, update anomaly & deletion anomaly.
Operational Methods of an Organization Ensuring the Safety of Data01. USE OF PASSWORDS AND PIN NUMBERS
A password is a secret code provided to a system to access its resources. Passwords and pin numbers are provided to an individual to deter any unauthorized access.
02. USER ACCESS LEVEL
This is a process by which the system administrator gives separate accounts with different access rights for each user to protect sensitive data from unwanted audience. Each user in the system is given a set of resources to access the system depending on his/her nature of the job he does. In most cases, the top management are given access to confidential data and employees are given access to filtered and limited data.
03. USING FILE ATTRIBUTES SUCH AS READ ONLY, HIDING ETC.
Most systems provide features such as hiding data or changing file properties to Read Only. This move ensures that original files are not tampered with or altered to change meaning.
Why do systems reboot?
State any two machines mentioned in the history of computers
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