COMPUTER STUDIES QUESTIONS WITH ANSWERS
List and explain the two data transmission techniquesPacket switching
Circuit switching
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Below is a diagram of a network topology Name the above topology Tree topology State two advantages and two disadvantages of using the topology named above Advantages of Tree topology
Disadvantages Tree topology
Distinguish between the following terms as used in data communicationGuided transmission medium and unguided transmission mediaGuided transmission medium is a transmission medium that transmits data to its destination using a physical medium such as cables while unguided transmission media is one that transmits data though free space. There is no physical connection between the communicating devices. Multiplexing and demultiplexingMultiplexing Is the process of sending multiple data signals over a single medium along a communication channel. While demultiplexing is the process of separating the multiplexed signals at the receiving end of a channel back to the number of transmission channels multiplexed. Logical and physical TopologyThe physical topology of a network refers to the physical arrangement of cables, computers, and other peripheral devices on a network.
Logical topology is the method used to pass information between computers on a network. Using one’s complement, perform the following binary arithmetic leaving the answer decimal notation.19/7/2023 Using one’s complement, perform the following binary arithmetic leaving the answer decimal notation.
Describe the term prefixing an extra sign bit as used in data representation.
The table below shows how a kiosk owner uses a spread sheet to keep records in a shop. Write a function to calculate the total buying price. =product(B2:C2) or =product(B2,C2) Write a formula to calculate the Profit. =E2-D2 The total buying prices of all items was increased by 12% and the value 12% is placed in cell B6. Using cell addresses with absolute referencing, write a formula to calculate the Total Selling Price in cell E2. =($B$6/100)*D2 State the output of the expression =SUMIF(F2:F5,"<1 500")would return.
2530 Define the following terms as used in charts. Legend
Data range
Change case is where a user applies so that the text can have some contrast in size. Write the word 'Digital SIGNAL' in:
Title case Digital Signal Toggle case dIGITAL signal State the importance of Column breaks as used in word processor.
The figure below shows a picture tool bar Name and state the functions of the features marked A, B and C: A Name: Cropping tool Function: Used to trim the unwanted parts of graphics B Name: Rotate left 900 Function: Used to rotate objects through an angle of 900 to the left C
Name: Text wrap tool Function: Used to place text arround graphics The roots of the equation ax2 + bx + c = 0 are given by the formula Write a pseudocode for the above program BEGIN INPUT A, B, C D= (B*B)-(4*A*C) IF D<0 THEN X1=INVALID X2=INVALID ELSE IF D=0 THEN X1= -B/(2*A) X2=X1 ELSE IF D>0 THEN X1= (- B + SQRT(D))/(2*A) X2= (- B - SQRT(D))/(2*A) END IF END IF END IF PRINT X1, X2 STOP Draw a flow chart for the above pseudocode
State three situations when REPEAT .. UNTIL structure can be used in writing a program
State two advantages and two disadvantages of high level programming languageAdvantages of high level programming
Disadvantages of high level programming
STATE TWO WAYS IN WHICH A COMPUTER USER CAN BE PROTECTED AGAINST ELECTRICAL SHOCKS.
Dan a computer student noticed that every time a person enters the computer lab the computer screen flickers. Identify three reasons why the monitor might be flickering
With an example for each, describe how computers are used in the following areas of education;19/7/2023 With an example for each, describe how computers are used in the following areas of education;Simulation This is whereby the compters are designed to resemble the actual enviroment for the users to learn instead of going to the actual environment which might be very expensive or risky for them. Example used for training pilots instead of using the actual planes Tutorial
These are learning materials provided in soft copy for the learners to read for knowledge. Example: e – books State three responsibility of a Database administrator in an organization.
In a computer based information system, state the purpose of the following files and give one example where such a file may be required in a school. Report file. A report file is used to extract records from the masterfile or generated after processing. It stores a copy of the generated reports by the system. Report file. A report file is used to extract records from the masterfile or generated after processing. It stores a copy of the generated reports by the system. Sort file.
A sort file is used where data is to be processed sequetially to first arrange the records in the order of the master file before updating it. Example students exams marks entered in a class list State three negative impact of information communication technology on the Environment.
State two ways in which users in an organization can be a security threat to data in an information system.
The figure below shows an extract of an e-mail application What is meant by each of the following terms: Trash Acts as a dust bin for your e-mail account where all deleted mails are stored before being permanently removed from the account Spam This is a folder in your account where all junk and suspicious mails received are stored Inbox
This is a folder in your account where all genuine mails received are stored KASSU Secondary School intends to set up internet connection in their school for e-learning purposes. Advise the school management on four internet connectivity requirements that is required for them to be able to access internet.
With an aid of a diagram, explain one-to-one database relationship. A one-to-one relationship is created if and only if the relating field in both tables are primary keys
Match the following statements with repeater, rooter or a bridge
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