*WAEC DATA PROCESSING*

*NUMBER FOUR*


(4a)
Hackers are individuals who gain unauthorized access to computer systems or networks, often to steal data or cause damage.

*WHILE*

Spammers send unsolicited or irrelevant messages, usually in bulk, often for advertising or phishing purposes.

(4b)
(PICK ANY ONE)
(i) Enhances Excel functionality (e.g., advanced data analysis).
(ii) Automates repetitive tasks.
(iii) Provides specialized tools (e.g., Solver, Analysis ToolPak).
(iv) Integrates Excel with other software or systems.
(v) Supports custom formulas and functions.
(vi) Improves productivity with custom user interfaces.

(4c)
(i) Cookies: Small files stored on a user's device by websites to remember information like login details or preferences.
(ii) Plugin: A software component that adds specific features to an existing computer program (e.g., video player plugin in a browser).
(iii) Web crawlers: Automated programs that browse the web to index content for search engines like Google.

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*WAEC FISHERIES*

*NUMBER FOUR*

(4a)
(PICK ANY FIVE)
(i) Foul or unpleasant odor
(ii) Murky or discolored water
(iii) High mortality rate in fish
(iv) Presence of algae blooms
(v) Low dissolved oxygen levels
(vi) Unusual fish behavior

(4b)
(PICK ANY FOUR)
(i) Regular water change
(ii) Proper pond aeration
(iii) Avoid overfeeding
(iv) Proper waste management
(v) Use of water testing kits
(vi) Liming to stabilize pH
(vii) Filtration systems
(viii) Avoiding overcrowding of fish

(4ci)
(PICK ANY THREE)
(i) Algae
(ii) Insects
(iii) Worms
(iv) Plankton
(v) Detritus
(vi) Aquatic plants

(4cii)
(PICK ANY THREE)
(i) Pellets
(ii) Crumbles
(iii) Mash
(iv) Flakes
(v) Dough
(vi) Extruded feed

(4di)
(PICK ANY THREE)
(i) Broadcasting
(ii) Tray feeding
(iii) Hand feeding
(iv) Automated feeding
(v) Demand feeding
(vi) Feeding rings

(4dii)
35% to 45%

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*DATA PROCESSING*

(1ai)
Data processing refers to the series of operations performed on data to extract, transform, and load information into a useful and meaningful form. It involves manipulating and analyzing data to produce meaningful results, such as reports, summaries, or forecasts.

(1aii)
Data collation refers to the process of gathering, collecting, and organizing data from various sources into a single, unified view. It involves aggregating data from different places, such as databases, files, or spreadsheets, to create a comprehensive dataset.

(1b)
The Data Processing Cycle, also known as the Information Processing Cycle.

(1c)
(i)Speed
(ii)Accuracy
(iii)Capacity

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