Explain a situation when each of the following Desktop Publishing programs features may be used when creating a document
(i) Crop - used when handling a graphic and there is a need to remove some of the portions in the graphic
(ii)Transparency - used when there is a need to make background of a graphic visible
Joe plays online games using the world wide web. A sequence of processes is required to open a web page. Describe this sequence of processes
What is utility software?
What is a Uniform Resource Locator?
State the function of a switch in a computer network
Describe the problem recognition and definition stage of system development
The following are software classified according to the end user licence agreement. Briefly describe each of them:
open source software, freeware, shareware, and proprietary software
Open source : refers to software provided freely with its source code. The user can modify and redistribute the software.
Freeware: these are software that can be downloaded for free and distributed, buta the source code is hidden and cannot be altered.
Shareware: is software that is available for free within a given trial period, after which it must be bought.
Proprietary: software made for commercial purposes. The source code is hidden, and it can only be used after paying for a licence.
Explain what is meant by the two terms download speed and upload speed
download speed :
– speed at which information/data is transferred FROM server/Internet
– speed at which information/data is transferred TO the user’s computer
upload speed :
– speed at which information/data is transferred FROM user’s computer
– speed at which information/data is transferred TO the Internet/server
Define the following modes of electronic data processing:
Multi-tasking - It is a data processing modes where a single CPU processing more than one task or program apparently at the same time
Time-sharing - a processing mode where a single CPU processes tasks from more than one user apparently at the same time
Time-sharing - this is a processing mode in which the CPU serves two or more users with different processing requirements ( tasks)
On-line processing - is a mode of processing where the result of data processing transaction is available immediately
Real-time processing - is a mode of data processing in which the time interval required to process and respond to inputs is so small that the response itself is useful for controlling the physical activity of a process
Give one reason why use of video-conferencing has increased over the last ten years.
– faster communications now widely available
– safety reasons, e.g. increase in terrorist attacks on international flights
– reduced transportation/accommodation/hardware costs
– environmental issues, e.g. reduced carbon footprint
– increase in multinational working
(i) Give three advantages and disadvantages of using a touch-sensitive interface.
Advantages
Disadvantages
State three ways of transforming a picture embedded in a DTP program in order to fit on a designated space on a document (kcse 2019 paper 1)
b) Give one benefit of each type of data transmission
Serial
The Acme company stores data for a private scientific research group. It has recently upgraded its storage capacity and needs to dispose of its existing hard drives securely. Outline two methods for the secure disposal of the data on the hard drives.
Acme company needs to ensure that if they are reselling the drives they wipe the drive (this should be done regardless of the destruction of the drive) to the DoD standard.
This would ensure that any software cannot be used to locate files.
Describe the purpose of a data dictionary, using an address book database as an example.
Data integrity in a database can be divided into three categories: referential integrity, domain integrity and entity integrity.
(a)Outline the meaning of each of the following.
(i) Referential integrity
(ii) Entity integrity
(b) Describe how data integrity can improve the process of database management. (2 marks)
(i) Referential integrity
(ii) Entity integrity
(b) Describe how data integrity can improve the process of database management. (2 marks)
State the symptoms of a computer virus
Slow Performance: If your computer suddenly becomes significantly slower than usual, taking longer to boot up, open applications, or respond to commands, it could be a sign of a virus. Viruses can consume system resources, resulting in decreased performance.
Frequent Crashes: If your computer frequently crashes, freezes, or experiences sudden system reboots without any apparent reason, it could be due to a virus. Some viruses can interfere with system stability, leading to unexpected crashes or instability.
Unusual Pop-ups or Ads: If you start noticing an excessive number of pop-ups, advertisements, or banners appearing on your computer screen, especially when you're not browsing the internet, it might be an indication of adware or malware infection.
Unwanted Modifications: Viruses can modify system settings or configurations without your consent. If you observe changes in your default browser homepage, new toolbars appearing, unfamiliar icons on the desktop, or altered settings, it could be a sign of a virus.
Unusual Network Activity: If you notice excessive network traffic, unusual data transfers, or a sudden increase in data usage without any known reason, it could be an indication of a virus or malware actively communicating with external servers.
Missing or Modified Files: Viruses can delete, encrypt, or modify files on your computer. If you find missing files or encounter unexpected changes in file sizes, names, or extensions, it could be a result of a virus infection.
Disabled Security Software: Some viruses attempt to disable or circumvent antivirus or security software to avoid detection. If you notice that your antivirus program or firewall is deactivated, modified, or unable to update, it could be due to a virus compromising your security software.
Unexpected Email or Message Activity: Viruses can use infected computers to send spam emails or messages to contacts in your address book without your knowledge. If your friends or colleagues report receiving suspicious or unexpected emails or messages from you, it could be a sign of a virus.
Identify four different types of computer network.
Factors to consider when choosing DTP software. (4 marks)