WAEC Data Processing 2019 past questions and answers

45 questions. Try each one, then open the answer to check yourself and read the explanation.

Question 1

History of Computers

The modern definition of a computing machine is based on a concept known as

  1. A.circuit switching.
  2. B.digital circuit.
  3. C.packet switching.
  4. D.stored program.
Show the answer and explanation

Answer: D (stored program.)

Explanation

Modern computers follow the stored-program concept: instructions and data are kept together in memory.

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Question 2

History of Computers

Arrange the following ICT tools in the order of invention from the earliest to the latest: cell phone, Internet, satellite and radio.

  1. A.Cell phone, satellite, radio, Internet
  2. B.Internet, satellite, cell phone, radio
  3. C.Radio, satellite, Internet, cell phone
  4. D.Radio, cell phone, satellite, Internet
Show the answer and explanation

Answer: C (Radio, satellite, Internet, cell phone)

Explanation

Radio came in the 1890s, the first satellite in 1957, the Internet's forerunner ARPANET in 1969 and the first handheld cell phone in 1973.

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Question 3

Information Processing

The process of gathering facts and statistics from different sources is known as data

  1. A.analysis.
  2. B.collection.
  3. C.collation.
  4. D.retrieval.
Show the answer and explanation

Answer: B (collection.)

Explanation

Gathering facts from different sources is data collection.

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Question 4

Data and Information

A chart is a graphical representation of

  1. A.data.
  2. B.map.
  3. C.process.
  4. D.transmission.
Show the answer and explanation

Answer: A (data.)

Explanation

A chart shows data as a picture, e.g. bars or a pie.

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Question 5

History of Computers

The use of transistors in circuits was a major advancement in the

  1. A.first generation computers.
  2. B.second generation computers.
  3. C.third generation computers.
  4. D.fourth generation computers.
Show the answer and explanation

Answer: B (second generation computers.)

Explanation

Transistors replaced vacuum tubes in second-generation computers.

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Question 6

Internet

An ICT-based service that uses telecommunication devices to hold meeting among many participants in two or more locations is known as

  1. A.broadcasting.
  2. B.multimedia.
  3. C.pod casting.
  4. D.teleconference.
Show the answer and explanation

Answer: D (teleconference.)

Explanation

A teleconference is a meeting held over telecommunication links between people in different places.

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Question 7

Information Transmission

Which of these devices does not support wireless communication?

  1. A.GSM phone
  2. B.Mouse
  3. C.Router
  4. D.Telephone
Show the answer and explanation

Answer: D (Telephone)

Explanation

A fixed (landline) telephone works through wires; GSM phones, routers and many mice can work wirelessly.

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Question 8

Computer Hardware

The following hardware devices are used for output operations except.

  1. A.monitor.
  2. B.microphone.
  3. C.plotter.
  4. D.projector.
Show the answer and explanation

Answer: B (microphone.)

Explanation

A microphone is an input device; monitors, plotters and projectors are output devices.

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Question 9

Information Processing

The manipulation of digitized information by computer or other digital electronic equipment is known as

  1. A.data collation.
  2. B.data manipulation.
  3. C.information manipulation.
  4. D.information processing.
Show the answer and explanation

Answer: D (information processing.)

Explanation

Information processing is the handling and changing of digital information by computers.

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Question 10

Information Processing

Which of the following statements explains information processing?

  1. A.Saving documents in a device
  2. B.Changing information detectable by an observer
  3. C.Data upload to server
  4. D.Transfer of information between devices
Show the answer and explanation

Answer: B (Changing information detectable by an observer)

Explanation

Information processing is any change of information in a way an observer can detect; saving, uploading and transfer are only parts of it.

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Question 11

Information Transmission

The information transmission medium from location A to location B in space is called

  1. A.asynchronous transmission.
  2. B.guided transmission.
  3. C.synchronous transmission.
  4. D.wireless transmission.
Show the answer and explanation

Answer: D (wireless transmission.)

Explanation

Signals sent through space without cables use wireless transmission.

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Question 12

Information Transmission

What is the role of the part labelled II in Figure 1?

Diagram for this question
  1. A.Interpreter
  2. B.Medium
  3. C.Receiver
  4. D.Source
Show the answer and explanation

Answer: B (Medium)

Explanation

The remote (I) is the source, the car door (III) is the receiver, and the signal path between them (II) is the medium.

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Question 13

Computer Networks

Which of these technologies allows wireless connectivity in a Personal Area Network?

  1. A.Bandwidth
  2. B.Bluetooth
  3. C.Broadband
  4. D.Satellite
Show the answer and explanation

Answer: B (Bluetooth)

Explanation

Bluetooth links nearby devices wirelessly over a short range, forming a PAN.

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Question 15

Internet

Use Figure 3 to answer questions 15 and 16.
The title of the web page being accessed on the interface in Figure 3 is displayed on the part labelled

Diagram for this question
  1. A.I.
  2. B.II.
  3. C.III.
  4. D.IV.
Show the answer and explanation

Answer: A (I.)

Explanation

A web page's title appears on the title bar/tab at the very top of the browser window (I).

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Question 16

Internet

The shortcut key combination for adding a new tab in Figure 3 is

Diagram for this question
  1. A.Alt + N.
  2. B.Alt + T.
  3. C.Ctrl + N.
  4. D.Ctrl + T.
Show the answer and explanation

Answer: D (Ctrl + T.)

Explanation

Ctrl + T opens a new tab in a browser; Ctrl + N opens a new window.

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Question 17

Software and Operating Systems

A program that enables the computer hardware to communicate and function effectively is

  1. A.translator.
  2. B.liveware.
  3. C.operating system.
  4. D.application software.
Show the answer and explanation

Answer: C (operating system.)

Explanation

The operating system controls the hardware and lets the parts work together.

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Question 18

Word Processing

A Word document can have any of these file extension except.

  1. A..doc.
  2. B..docx.
  3. C..jpg.
  4. D..rtf.
Show the answer and explanation

Answer: C (.jpg.)

Explanation

.jpg is a picture format; Word saves documents as .doc, .docx or .rtf.

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Question 19

Word Processing

Which of the following command shortcuts can be used to display the dialog box in Figure 4 when the application is running?

Diagram for this question
  1. A.Ctrl + O
  2. B.Ctrl + S
  3. C.Ctrl + Y
  4. D.Ctrl + Z
Show the answer and explanation

Answer: B (Ctrl + S)

Explanation

Figure 4 is the Save As box; pressing Ctrl + S on a new, unsaved document opens it.

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Question 20

Spreadsheet

The first step taken in editing a chart in MS Excel is

  1. A.click and drag the chart object.
  2. B.click the chart object.
  3. C.copy the chart object.
  4. D.drag the chart object.
Show the answer and explanation

Answer: B (click the chart object.)

Explanation

You must first click (select) the chart before you can change it.

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Question 21

Spreadsheet

By default, numeric values in a worksheet are

  1. A.centered.
  2. B.left-aligned.
  3. C.right-aligned.
  4. D.unaligned.
Show the answer and explanation

Answer: C (right-aligned.)

Explanation

Excel right-aligns numbers and left-aligns text by default.

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Question 22

Database Management

The diagram in Figure 5 depicts a

Diagram for this question
  1. A.flat file database.
  2. B.hierarchical database.
  3. C.network database.
  4. D.parallel database.
Show the answer and explanation

Answer: C (network database.)

Explanation

Some lower records (e.g. SS 3C, SS 3D) are linked to more than one stage, so it is a network model, not a tree.

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Question 23

Database Management

Which of the following sets are available when creating a table in “Design View” in Microsoft Access?

  1. A.DataType, Description and Field Name
  2. B.Description, Criteria and Field Property
  3. C.Field Name, DataType and Field Property
  4. D.Criteria, Field Name and Description
Show the answer and explanation

Answer: A (DataType, Description and Field Name)

Explanation

Table Design View has three columns: Field Name, Data Type and Description; Criteria belongs to query design.

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Question 24

Presentation Package

The MS Power Point feature which can be used to change the appearance of the entire presentation is the

  1. A.Add slide option.
  2. B.Design template.
  3. C.Online view.
  4. D.Slide Layout option.
Show the answer and explanation

Answer: B (Design template.)

Explanation

A design template (theme) changes the colours, fonts and background of every slide at once.

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Question 25

Web Design

One example of web design package is

  1. A.MS FrontPage.
  2. B.MS Outlook.
  3. C.Peachtree.
  4. D.SPSS.
Show the answer and explanation

Answer: A (MS FrontPage.)

Explanation

FrontPage is a web design package; Outlook is e-mail, Peachtree is accounting and SPSS is statistics.

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Question 26

Graphics Packages

The part labelled II in Figure 6 is used to

Diagram for this question
  1. A.shape objects.
  2. B.select and transform objects.
  3. C.draw lines and cures.
  4. D.create texts.
Show the answer and explanation

Answer: A (shape objects.)

Explanation

Tool II is CorelDRAW's Shape tool, used to edit the shape of objects by moving their nodes; selecting and transforming is done with the Pick tool (I).

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Question 27

Computer Maintenance

In computer maintenance, the dampen material can be used on the following devices except.

  1. A.DVD lens.
  2. B.keyboard.
  3. C.mouse.
  4. D.screen.
Show the answer and explanation

Answer: A (DVD lens.)

Explanation

Moisture can damage the DVD lens; it is cleaned with a dry lens cleaner.

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Question 28

Computer Maintenance

Dust from the system unit casing can be removed using

  1. A.antistatic wipes.
  2. B.cotton wool.
  3. C.static wipes.
  4. D.wet cloth.
Show the answer and explanation

Answer: A (antistatic wipes.)

Explanation

Antistatic wipes remove dust without building up static that could harm parts.

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Question 29

Internet

Indiscriminate sending of unsolicited e-mails to many e-mail addresses is known as

  1. A.plagiarism.
  2. B.phishing.
  3. C.pharming.
  4. D.spamming.
Show the answer and explanation

Answer: D (spamming.)

Explanation

Spamming is sending unwanted bulk e-mail.

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Question 30

Computer Ethics and Safety

In computing, ergonomics is a term associated with computer

  1. A.ethics.
  2. B.maintenance.
  3. C.malware detection.
  4. D.safety measure.
Show the answer and explanation

Answer: D (safety measure.)

Explanation

Ergonomics is about designing and arranging computers so users work safely and comfortably, so it is a safety measure.

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Question 31

Computer Maintenance

A novice is discouraged from opening the CRT monitor for maintenance because

  1. A.it cannot be appropriately reassembled after opening.
  2. B.it may habour pests carrying infectious diseases.
  3. C.it may contain high static voltage.
  4. D.the tube is fragile.
Show the answer and explanation

Answer: C (it may contain high static voltage.)

Explanation

A CRT can store a very high voltage even when switched off, which can give a dangerous shock.

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Question 32

Computer Professionals

Computer professional bodies in Nigeria include the following except

  1. A.Internet Service Providers Association of Nigeria.
  2. B.Nigerian Computer Society.
  3. C.Nigerian Information Technology Development Agency.
  4. D.Nigeria Internet group.
Show the answer and explanation

Answer: C (Nigerian Information Technology Development Agency.)

Explanation

NITDA is a government agency that regulates IT, not a professional body; the others are associations of IT people or firms.

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Question 33

Computer Virus

The malware which appears as a harmless object but attacks its victims at the slightest opportunity is called

  1. A.worm.
  2. B.trojan horse.
  3. C.macro virus.
  4. D.logic bomb.
Show the answer and explanation

Answer: B (trojan horse.)

Explanation

A Trojan horse pretends to be useful or harmless but does damage when run.

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Question 34

Computer Virus

Virus effect can be prevented by

  1. A.installing and updating antivirus.
  2. B.installing new operating system.
  3. C.purchasing new computer.
  4. D.using external disks on public computer system.
Show the answer and explanation

Answer: A (installing and updating antivirus.)

Explanation

An up-to-date antivirus detects and removes viruses before they do harm.

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Question 35

Database Management

The part of the object in Figure 7 labbeled II are called

Diagram for this question
  1. A.attributes.
  2. B.entities.
  3. C.models.
  4. D.relations.
Show the answer and explanation

Answer: A (attributes.)

Explanation

ID, First Name, Last Name, etc. describe the Customers entity, so they are its attributes.

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Question 36

Database Management

The arrangement that gives the correct order of magnitude of the database elements is

  1. A.character, field, record, table, database, file.
  2. B.character, field, record, table, file, database.
  3. C.database, table, file, record, field, character.
  4. D.database, record, file, field, table, character.
Show the answer and explanation

Answer: B (character, field, record, table, file, database.)

Explanation

Characters make fields, fields make records, records make tables/files, and these make up a database.

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Question 37

File Organisation

One unique feature of index file is that it contains

  1. A.reference number.
  2. B.relative number.
  3. C.sequence number.
  4. D.static number.
Show the answer and explanation

Answer: A (reference number.)

Explanation

An index holds each record's key with a reference to where the record is stored.

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Question 38

File Organisation

Which of the following file organizations requires a primary key?

  1. A.Indexed file organization
  2. B.Random file organization
  3. C.Serial file organization
  4. D.Sequential file organization
Show the answer and explanation

Answer: A (Indexed file organization)

Explanation

An indexed file is built on a unique key field that the index points to.

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Question 39

Data Security

Ensuring the correctness and consistency of data is referred to as data

  1. A.security.
  2. B.reliability.
  3. C.productivity.
  4. D.integrity.
Show the answer and explanation

Answer: D (integrity.)

Explanation

Data integrity means data is accurate and consistent.

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Question 40

Distributed and Parallel Databases

In distributed database management system, breaking a relation into smaller relations is known as

  1. A.replication.
  2. B.fragmentation.
  3. C.indexing
  4. D.normalization.
Show the answer and explanation

Answer: B (fragmentation.)

Explanation

Fragmentation splits a table into smaller pieces stored at different sites.

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Theory question 101

Information Transmission

Paper 2, Section A: Essay
(a) What is teleconferencing? (b) State four uses of Automated Teller Machine (ATM). (c)(i) Give the function of a modem. (ii) List the two means of transmitting information.

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Model answer

(a) Teleconferencing is holding a live meeting between people in different places using telecommunication (telephone, video or internet links).
(b) Any four: withdrawing cash; checking account balance; transferring money; buying airtime/recharge; paying bills (electricity, DSTV); printing mini statements; changing PIN; depositing cash (some ATMs).
(c)(i) A modem converts (modulates) digital signals from the computer into analogue signals for the telephone line and converts (demodulates) them back at the other end.
(ii) Wired (guided) and wireless (unguided) transmission (or: ancient/traditional means and modern/electronic means).

Explanation

Modem = modulator-demodulator; say both directions.

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Theory question 102

ICT in Society

Paper 2, Section A: Essay
Hamza, Emeka, Funsho, Fejiro and Idongesit were friends from secondary school. Now, Hamza is a pilot, Emeka is a businessman, Funsho is a banker, Fejiro is a manufacturer while Idongesit is a teacher. State two ways in which each of these friends can apply ICT in their respective professions.

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Model answer

Pilot (Hamza): flight simulators for training; computerised navigation/autopilot and radar; weather information; flight recorders; online booking and scheduling.
Businessman (Emeka): e-commerce/online selling; spreadsheets and accounting software for records; e-mail and social media for advertising and customer contact; online payments.
Banker (Funsho): ATMs; online/mobile banking; electronic funds transfer; computerised customer records; cheque clearing with MICR.
Manufacturer (Fejiro): computer-aided design and manufacturing (CAD/CAM); robots and automated production lines; stock control software; process monitoring.
Teacher (Idongesit): presentations with projectors; e-learning and online resources; computer-based tests; keeping student records and results on computer.

Explanation

Give two different uses for each of the five people.

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Theory question 103

Computer Networks

Paper 2, Section A: Essay
(a) A secondary school has over twenty personal computers. The school management intends to connect the computers in a network. Give four reasons that must have motivated the school management into connecting the computers together. (b) List four network devices required to accomplish the task in 3(a). (c) State one function each for any two of the devices listed in 3(b).

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Model answer

(a) Any four: to share files and data; to share printers, scanners and internet connection; to communicate (e-mail, messages); central storage and backup; easier management and security; to save cost.
(b) Any four: network interface card (NIC); cables (UTP/fibre); switch or hub; router; modem; wireless access point; server.
(c) Any two: NIC – connects a computer to the network; switch/hub – connects many computers in the LAN and passes data between them; router – connects the LAN to other networks (internet) and forwards packets; modem – converts signals for internet connection; cable – carries signals between devices.

Explanation

Name the device, then its job in one line.

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Theory question 104

Database Management

Paper 2, Section A: Essay
(a) Explain the following database management terms: (i) entities (ii) attributes; (iii) relationships. (b)(i) Define cardinality in database management. (ii) Mention three cardinality relationships in database management.

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Model answer

(a)(i) An entity is a person, place, thing or event about which data is stored, e.g. a student (a table).
(ii) An attribute is a property that describes an entity, e.g. a student's name or date of birth (a field/column).
(iii) A relationship is a link between entities, e.g. a student registers for a course.
(b)(i) Cardinality is the number of instances of one entity that can be related to instances of another entity.
(ii) One-to-one (1:1); one-to-many (1:M); many-to-many (M:N).

Explanation

Give a school example for each term.

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Theory question 105

Computer Hardware

Paper 2, Section B
(a) Figure 1 illustrates a part of a computer system. (i) Identify the part labelled Y. (ii) State: I. the technology used in the part labelled Z. II. the function of the part labelled X. III. one maintenance practice for the part labelled Z.
(b) Figure 2 shows a setup of a computer system. State one function of each of the parts labelled P, Q, R, S, and T.
(c) Outline the steps taken to perform the following tasks in CorelDraw application: (i) insert a circular shape; (ii) add the caption “Happy Birthday” around the circular shape; (iii) change the colour of the caption to green.

Diagram for this question
Show the model answer
Model answer

(a)(i) Y – the CD/DVD-ROM (optical disc) drive tray.
(ii) I. Optical (laser) technology – the compact disc is read by a laser.
II. X – the power/eject button, used to open and close the drive (or switch it on and off).
III. Any one: clean the disc and lens with a soft lint-free cloth or lens cleaner; hold discs by the edges; keep the drive closed and free of dust.
(b) P – monitor: displays output. Q – system unit: holds the CPU, memory and storage that process data. R – mouse: points and selects items on the screen. S – keyboard: types data and commands into the computer. T – flash drive: stores and carries data from one computer to another.
(c)(i) Select the Ellipse tool (F7); hold Ctrl and drag to draw a circle.
(ii) Select the Text tool (F8), click and type Happy Birthday; select the text, choose Text → Fit Text to Path and click the circle.
(iii) Select the caption and click green on the colour palette.

Explanation

Z is a compact disc, so the technology is optical (laser).

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Theory question 106

Spreadsheet

Paper 2, Section B
Table 1 shows the list of items and the quantity of the item needed by a student. The table was created on an MS Excel worksheet. Use the table to answer questions 6(a)(i) - (iv)
(a) Outline the steps to: (i) create a bar chart on the worksheet such that the items would be labeled on the chart and the percentage of each item included. (ii) add to the table, a new; A. column; B. row. (iii) State one function in MS Excel that can be used to determine the item with the highest quantity.
(b) Outline the steps to add page border to a document using Art Design Tool in MS Word application.
(c) An MS Word document contains the phrase “WAEC Exam”. Highlight the steps to link the phrase above to the WAEC website. (http://www.waec.org.ng)

Diagram for this question
Show the model answer
Model answer

(a)(i) Select the table (items and quantities); click Insert → Column/Bar chart → choose a bar chart; with the chart selected click Chart Elements (+) → Data Labels to show the item labels; to show percentages add a column with =B2/SUM($B$2:$B$7) formatted as %, and use it for the data labels (Format Data Labels → Value From Cells).
(ii) A. Right-click a column letter → Insert (a new column appears to its left). B. Right-click a row number → Insert (a new row appears above it).
(iii) The MAX function, e.g. =MAX(B2:B7) (or use Sort Descending / LARGE).
(b) Click Design (Page Layout) → Page Borders; in the Page Border tab open the Art list and choose a design; set width and apply to Whole document; click OK.
(c) Select the phrase WAEC Exam; click Insert → Hyperlink (Ctrl + K); in the Address box type http://www.waec.org.ng; click OK.

Explanation

Hyperlink = Ctrl + K; Page Borders has an Art box.

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