WAEC Data Processing 2025 past questions and answers

The Difference Engine was developed by

1. A.Blaise Pascal.
2. B.Charles Babbage.
3. C.Herman Hollerith.
4. D.John Von Neumann.

Convert AOB_HEX to a number in binary.

1. A.101001011,
2. B.101101010,
3. C.101000001011,
4. D.101100001010,

Audio data are produced from

1. A.animations.
2. B.graphics.
3. C.pictures.
4. D.sounds.

Which of the following variables is an example of numeric data?

1. A.568
2. B.B2
3. C.₦10.00
4. D.Twenty-five

The generation of computers in which transistor was first introduced is the

1. A.fifth generation.
2. B.fourth generation.
3. C.second generation.
4. D.third generation.

One application of ICT in medicine is

1. A.Computer Aided Learning.
2. B.Computer Aided Manufacturing.
3. C.Computerized Axial Tomography.
4. D.Optical Character Recognition.

Which one of the following reasons justifies the prevalence of Personal Digital Assistance devices? They

1. A.are light weight and are very expensive.
2. B.are very portable and can be used everywhere.
3. C.have limited capabilities when compared to desktop and laptop computers.
4. D.have small keyboard for input operation.

Which one of the following actions can be achieved by right-clicking a computer mouse?

1. A.Closing of the current windows
2. B.Display of dialog box
3. C.Minimizing of active windows
4. D.Opening of contextual menus

Which one of the following statements does not explain information processing?

1. A.Act of saving documents
2. B.Changing of information detectable by an observer
3. C.Conversion of raw data into information
4. D.Process that describes everything that happens to a piece of information

The part labelled X in Figure 1 is called

1. A.analysis.
2. B.evaluation.
3. C.feedback.
4. D.retreat.

Which one of the following gadgets allows the transmission of both visual and audio information?

1. A.Facsimile
2. B.Radio
3. C.Television
4. D.Walkie-Talkie

Use Figure 2 to answer questions 13 and 14.
The underlying technology in the network connection in Figure 2 is called

1. A.Bluetooth.
2. B.Ethernet.
3. C.Laser Jet.
4. D.Optical Fibre.

One limitation of the network type in Figure 2 is that

1. A.cost of maintenance is high.
2. B.distance covered is short.
3. C.resources that can be shared are selective.
4. D.weather can affect the rate of data sharing.

Use Figure 3 to answer questions 15 and 16.
The interface in Figure 3 is used for

1. A.creating new sites.
2. B.creating portable documents.
3. C.sending and receiving e-mails.
4. D.sending and receiving SMS.

The part labelled III in Figure 3 is used for

1. A.keeping draft sites.
2. B.keeping unfinished sites.
3. C.saving portable documents.
4. D.saving unsent e-mails.

What happens when the Shift key is pressed down while deleting a file from the computer in windows? The file is

1. A.uninstalled from the computer.
2. B.permanently deleted from the computer.
3. C.deleted and sent to the Recycle bin.
4. D.deleted and kept in the clipboard.

Figure 4 is a full set of page formatting options captured from MS Word application. Use it to answer questions 18 and 19.
A user who was typing a document in portrait orientation decided to complete the next few pages in landscape orientation. Which one of the following options illustrates the correct order of steps the user must follow by clicking on the labelled parts to achieve this?

1. A.I, III and V
2. B.I, IV and V
3. C.II, III and V
4. D.II, IV and V

Figure 4 is a full set of page formatting options captured from MS Word application. Use it to answer questions 18 and 19.
Which one of these options gives the correct order of steps to revert to portrait orientation after typing in landscape orientation for a while?

1. A.I, III and V
2. B.I, IV and V
3. C.II, III and V
4. D.II, IV and V

What happens when a user clicks on the Microsoft Excel menu bar icon shown in Figure 5?

1. A.A copy of the selection is put on the clipboard
2. B.A label that spans multiple columns is created
3. C.Content on the clipboard is added to the insertion point
4. D.Selected range of cells is quickly converted to a table with its own style

To add a new row above EKITI on the MS Excel interface shown in Figure 6, the user would right-click on

1. A.cell A5 and then click on insert.
2. B.cell A6 and then click on insert.
3. C.row 5 and then click on insert.
4. D.row 6 and then click on insert.

Which one of the following points is not considered when designing a database in Microsoft Access? Determine

1. A.how forms will be used.
2. B.how tables will be related.
3. C.the data needed.
4. D.the purpose of the database.

Tables in Microsoft Access are created using the following methods except

1. A.Datasheet view.
2. B.Design view.
3. C.Table insertion.
4. D.Table wizard.

The keyboard shortcut for adding a new slide to Microsoft PowerPoint application is

1. A.Ctrl + H.
2. B.Ctrl + M.
3. C.Alt + H.
4. D.Alt + M.

The erratic movement of the mouse pointer is usually caused by

1. A.bad connection.
2. B.dirty mouse ball.
3. C.driver error.
4. D.hardware failure.

The suitable method of removing particles from the keyboard is by

1. A.cleaning with dripping wet cloth.
2. B.cleaning with iron brush.
3. C.using compressed air.
4. D.using hot air.

Which one of the following statements is true about preventing phishing?

1. A.Ensure that antivirus is updated regularly
2. B.Do not click on links in e-mails from unknown sources
3. C.Do not download from untrusted sites
4. D.Use a strong password at all times

Preventive maintenance measures in the computer room include the following except

1. A.good ventilation.
2. B.maintaining dust-free environment.
3. C.proper illumination.
4. D.the use of rugs on the floor.

When cleaning the computer system, it is advisable to

1. A.restart the computer first.
2. B.turn off the computer and disconnect from power source.
3. C.use antiglare cover to protect the screen.
4. D.use multimeter tester for earthing.

Which one of the following programs is not a type of virus?

1. A.Boot sector virus
2. B.Logic bomb
3. C.Polymorphic virus
4. D.Trojan horse

The computer virus accesses the user's computer and waits for a trigger during the

1. A.dormant phase.
2. B.execution phase.
3. C.propagation phase.
4. D.trigger phase.

The SQL constraint used to ensure the accuracy and consistency of data in a relational database is called

1. A.default constraint.
2. B.index constraint.
3. C.integrity constraint.
4. D.unique constraint.

To create a one-to-one relationship in database, it is necessary that

1. A.both primary and foreign key fields should have multiple key index.
2. B.both primary and foreign key fields should have unique key index.
3. C.only the foreign key field should have a unique index.
4. D.only the primary key field should have a unique index.

An advantage of manual file over computer file is that

1. A.it is more efficient.
2. B.it requires less storage space.
3. C.risk of corrupted data is much less.
4. D.speed of processing is high.

A user observed that a certain file in a removable storage device changed to a shortcut icon. This implies that

1. A.the file is corrupt.
2. B.the file is shared.
3. C.the removable storage device is corrupt.
4. D.there is a link to the file.

The objectives to consider while designing a secure database application include the following except

1. A.simplicity.
2. B.secrecy.
3. C.integrity.
4. D.availability.

Which one of the following features is not an advantage of distributed database?

1. A.Better response
2. B.Lower communication cost
3. C.Improved reliability
4. D.Need for complex software

Paper 2, Section A: Short-structured questions
(a) Explain the following terms: (i) data processing; (ii) data collation. (b) Describe Data Processing Cycle. (c) State four benefits of the computer as a tool for processing data.

Paper 2, Section A: Short-structured questions
Figure 1 is a setup of computer system. Use the setup to answer questions 2(a) to 2(c). (a) Identify the part labelled: (i) A; (ii) B; (iii) C; (iv) D. (b) For each device in the setup, tick (√) the box to show if it is an input device or an output device. (c) Name two devices that can be used for both input and output operations.

Paper 2, Section A: Short-structured questions
(a) With the aid of well-labelled diagram, explain the following modes of information transmission: (i) simplex; (ii) half duplex; (iii) full duplex. (b) State one example of: (i) simplex; (ii) half duplex; (iii) full duplex, mode of information transmission. (c) Name one component of a data communication system.

Paper 2, Section A: Short-structured questions
(a) Differentiate between hackers and spammers. (b) State one importance of add-in in MS Excel. (c) Explain the following terms in computing: (i) cookies; (ii) plugin; (iii) web crawlers.

Paper 2, Section B: Test of Practical Work
Figure 2 is an interface of an application software. Use it to answer questions 5(a) to 5(e). (a) Identify the type of application whose interface is shown in Figure 2. (b) Outline the steps to: (i) insert a new slide to the interface; (ii) delete a slide from the interface. (c) State two examples of the application in Figure 2. (d) Give two: (i) uses of the application in Figure 2; (ii) differences between transitions and animations in the application shown in Figure 2. (c) Highlight the steps to: (i) run slideshow in the application shown in Figure 2: (ii) print a handout of 6 slides on a page of the application shown in Figure 2.

Paper 2, Section B: Test of Practical Work
You are provided with a list of existing contacts in a database. Describe in detail. the step-by-step approach to: (a) create: (b) preview and complete. a mail merge using a template in MS Word.