Computer Studies Quiz

Define the following terms as used in computer. a). Firewalls (1 mk)

Answer explanation

Firewalls are security systems that monitor and control incoming and outgoing network traffic based on predetermined security rules, acting as a barrier between trusted internal networks and untrusted external networks.

Define the following terms as used in computer. b). Data encryption. (1 mk)

Answer explanation

Data encryption is the process of converting information into a coded format to prevent unauthorized access. It ensures data confidentiality by making the data unreadable without the appropriate decryption key.

What is an embedded computer? (2 mks)

Answer explanation

An embedded computer is a specialized computing system that is part of a larger device, designed to perform dedicated functions. Unlike general-purpose computers, they are optimized for specific tasks and often have real-time computing constraints.

a) State and explain the three mouse techniques. (3mks)

Answer explanation

The three mouse techniques are: 1) Click: pressing the mouse button to select items. 2) Double-click: quickly pressing the button twice to open files or applications. 3) Right-click: opening context menus for additional options.

b) Give one reason why a computer is referred to as an electronic device (1mk)

Answer explanation

A computer is referred to as an electronic device because it processes data using electronic circuits, which enable it to perform calculations and operations at high speeds.

List four fields which would be expected in a database file of information about students in a school. (2mks)

Answer explanation

In a database file about students, expected fields include: 'Student ID' for unique identification, 'Name' for personal identification, 'Date of Birth' for age verification, and 'Grade' to track academic progress.

State three changeover strategies that can be used to move from the old system to a new one. (3mks)

Answer explanation

Three changeover strategies are: 1) Direct Changeover - switching to the new system immediately. 2) Parallel Running - using both systems simultaneously for a time. 3) Pilot Running - implementing the new system in a small area before full rollout.

What is the meaning of the following as used in word-processing: a) Word wrap (2mks)

Answer explanation

Word wrap is a feature in word processing that automatically moves text to the next line when it reaches the end of the current line, ensuring that all text is visible without manual line breaks.

What is the meaning of the following as used in word-processing: b) Drop caps (2mks)

Answer explanation

Drop caps are large capital letters used at the beginning of a paragraph in word-processing. They enhance visual appeal and draw attention to the start of the text, making it more engaging for readers.

Explain the meaning of legends as used in Excel. (1 mk)

Answer explanation

In Excel, legends refer to the descriptive labels that identify the data series in charts. They help users understand what each color or pattern represents, enhancing the clarity of the visual data presentation.