All 40 questions from the West African Examinations Council (WAEC) Data Processing 2024 Objective paper, with the correct answer and a full explanation for each. Free, no signup needed.
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1. The Stepped Reckoner was developed by A.
The stepped Reckoner was developed by Gottfried Whichelm Leibnitz.
2. The binary number 100101(2) can be written in denary as A.
1x2^5+1x2^2+1x2^0 = 32+4+1 = 37 (base 10).
3. The first stage in computer data processing procedure is A.
The first stage in computer data processing is the collection of data which will be worked on.
4. One advantage of electronic data processing is that it A.
Electronic data processing can be used to handle complex and cumbersome data that would be impossible manually.
5. The type of computer that has the ability of counting in discrete form is referred to as A.
Digital computer counts in discrete form. Analog computer counts in continuous form. Hybrid computer is a combination of both.
6. A digital platform for the delivery of public sector information and seminar to citizens is called A.
(As printed the WAEC key marks D as the answer; note this may refer to a specific delivery platform terminology used in the source.)
7. One application of ICT in medicine is A.
Voice over IP converts voice and video data into a digital signal and transfers it over the internet. (This explanation corresponds to a related item; the key marks A for this item.)
8. A pointing device that controls cursor movement on the screen is A.
During processing, the cache, RAM and registers are used to store data. (Key answer: D, trackball is a pointing device.)
9. The process of inspecting, transforming and modeling data to get useful information is known as A.
Data Analysis is the process of inspecting, transforming and modelling data to get useful information.
10. One disadvantage of using computer for information processing is A.
Computers require ongoing maintenance, software updates, hardware upgrades and potential repairs leading to increased running cost in the long run.
11. The diagram in Figure 1 illustrates a process called A.
The process is known as information transmission.
12. The transmitter in communication is the component that A.
The transmitter launches the signal into the air where it can be received by a receiver.
13. Which of the following resources is not usually shared in a network? A.
Unlike folders, files and printers, a VGA projector is not typically shared in a network.
14. Factors to be considered when creating a backup system in a computer network include A.
The media to use, backup frequency and amount of data directly impact the effectiveness and reliability of the backup system, ensuring proper protection and retrieval of data when needed.
15. The URL www.exams.edu.ng represents the website of an examination body. It is A.
The URL www.exams.edu.ng represents the website of an examination body in Nigeria.
16. The Post Office Protocol (POP) is used to A.
POP is an application-layer Internet standard protocol used by email clients to retrieve email from a mail server.
17. A user working on a computer that is running Windows 7 issued the command Ctrl+Alt+Del while typing a document. What interface is expected to be displayed on the screen? A.
Ctrl+Alt+Del loads the windows security interface which provides options to: lock the computer; switch user; sign out; open task manager.
18. Header and Footer are added to a document in MS Word by just clicking on the A.
The Insert menu tab can be used to add a header and footer to a document in MS word.
19. A typist positioned the insertion point at the beginning of a line of text in a word processor and then pressed down the Shift key and clicked at the opposite end of the text. What would be the result of this action? The text will be A.
This action highlights the line of text on the screen (see Figure 2, representing the A-to-Z selection).
20. The Microsoft Excel menu bar icon shown in Figure 2 is used to A.
This icon is the sort and filter icon. It is used to organize data for easy analysis.
21. To add a new column to the right of the IGR column on the interface in Figure 3, the user would A.
Right-click on the column to the RIGHT of where you want the new column to be inserted, which is column D in this case and then, click on insert.
22. The function of the foreign key in a database is to A.
The foreign key exists to provide a link between two tables.
23. How many primary keys exist in Figure 4? A.
A primary key is a field that uniquely identifies each record. In this scenario, there are 3 primary keys in total: customerId, orderId, productId.
24. Which of the following lists contains the primary keys in Figure 4?
CustomerId, orderId, productId are the primary keys.
25. Web design packages include the following except A.
All but Front Page is a web design package. Front Page is also known as home page or landing page of a website.
26. The part labelled IV in Figure 5 is used to A.
The part labelled IV is the curve tool. It is used to draw lines, curves and shapes.
27. One precautionary measure taken when cleaning a monitor is covering the monitor with antiglare.
For any electronic device, always unplug the power supply cable before cleaning.
28. Which one of the following practices is considered ethical? A.
Ethical practice is the application of a good moral principles and values to guide decision-making and behaviour. Only option D here satisfies that.
29. Proper network implementation and good ICT policies are types of A.
Proper network implementation and good ICT policies aim to prevent security incidents from happening in the first place, hence preventive measures.
30. Preventive maintenance measures in the computer room include the following options except A.
Use of rugs in the computer room is not recommended as rugs can generate static electricity which can damage sensitive computer equipment. They can also trap moisture leading to humidity issues and have poor heat dissipation.
31. Measures taken to avoid eye strain include the following except A.
Relaxing the body regularly is not directly a measure to avoid eye strain.
32. A database administrator is responsible for the following tasks except A.
A database administrator is not typically responsible for maintaining the connection between a local network and the Internet.
33. A computer virus replicates into other programs or certain areas on the disk during the A.
During the propagation phase, a computer virus identifies potential targets (e.g. executive files, boot sectors), copies its code into the target program or area, and modifies the target to execute the virus code.
34. A malware that copies and replicates itself using computer network and security flaws is A.
A worm is a malware that copies and replicates itself using network and security flaws.
35. The entities in Figure 6 are named A.
An entity is a table or collection of data that represents a real-world object or concept. Student and Subject are entities.
36. Which one of the following statements is true about database tables? A.
Entries in a column are from different domains based on datatype.
37. The major difference between serial and sequential files is that sequential files are A.
Sequential files are sorted in a particular order while serial files are simply stored one after the other.
38. Which one of the following pairs contains computer file classification? A.
A master file is a permanent file while transaction file is a temporary file used to update the master file.
39. Which of the following statements support the goals of data backup? I. Need for duplication II. Need for future reference III. Protection against data loss
The need for duplication is not the primary goal of data backup but rather, duplication is a means to achieve data backup.
40. Which of the following characteristics is associated with the architecture of parallel database? A.
Shared-nothing architecture is a key characteristic of parallel databases.
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