2024 WAEC COMPUTER: (9292)

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*OBJ & INFO SECTION*

COMPUTER STUDIES

1-10: BCACCBCBDC

11-20: BABAAACADD

21-30: DCDBCCAABD

31-40: AADBDBBBBA

41-50: ABABACACDC

COMPUTER SCIENCE

(3a)

Universal Serial Bus (USB) is a common interface that enables communication between devices and a host controller such as a personal computer (PC) or smartphone.

(3aii)

(i)It is very easy to install USB device and requires only OS (Operating System).

(ii)USB supports different data rates from 1.5 Mbps to 5 Gbps with different distances.

(3b)

-TABULATE-

(1)

Name of storage device:

 FLOPPY DISK

Category of storage:

Tick SECONDARY 

(2)

Name of storage device:

DVD

Category of storage:

Tick OFFLINE 

(3)

Name of storage device:

READ ONLY MEMORY (ROM)

Category of storage:

Tick PRIMARY 

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(2a)

First, convert AB1¹⁶ into decimal, by using above steps:

= AB1¹⁶

= A × 162B × 1611 × 160

= 273710

Now, we have to convert 273710 to octal

2737 / 8 = 342 with remainder 1

342 / 8 = 42 with remainder 6

42 / 8 = 5 with remainder 2

5 / 8 = 0 with remainder 5

Then just write down the remainders in the reverse order to get the answer, The hexadecimal number AB1 converted to octal is therefore is equal to 5261

(2b)

Decimal equivalent of "1" = 1 × 3^1 = 3

Decimal equivalent of "1" = 1 × 3^2 = 9

Decimal equivalent of "0" = 0 × 3^3 = 0

Decimal equivalent of "1" = 1 × 3^4 = 81

Decimal equivalent of "1" = 1 × 3^5 = 243

Decimal equivalent of "110111" = 243810931

110111 = 337

Now we will convert the fractional part 0.101 to decimal form (Don't forget that we start from tenths palce to so on..):

Decimal equivalent of "1" = 1 × 3^-1 = 0.33333333333333

Decimal equivalent of "0" = 0 × 3^-2 = 0

Decimal equivalent of "1" = 1 × 3^-3 = 0.037037037037037

Decimal equivalent of "0.101" = 0.3333333333333300.037037037037037

0.101 = 0.37037037037037

Here is the final answer, The ternary number 110111.101 converted to decimal is therefore equal to:

= 110111.1013

= 33710 + 0.3703703703703710

= 337.3703703703703710

(2c)

First, convert 5078 into decimal, by using above steps:

= 5078

= 5 × 820 × 817 × 80

= 32710

Now, we have to convert 32710 to binary

327 / 2 = 163 with remainder 1

163 / 2 = 81 with remainder 1

81 / 2 = 40 with remainder 1

40 / 2 = 20 with remainder 0

20 / 2 = 10 with remainder 0

10 / 2 = 5 with remainder 0

5 / 2 = 2 with remainder 1

2 / 2 = 1 with remainder 0

1 / 2 = 0 with remainder 1

101000111²

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(1a)

report in a database is the report created from a culmination of queried data visualized for the purposes of analysis, data discovery, and decision-making. In other words database reports can be created through traditional BI platforms and embedded BI platforms through front-end calls to a backend database.

(1b)

(i)Database reporting tools allow you to access any database and create reports based upon the stored data.

(ii)Relational databases store data in tabular relations. A database reporting tool typically queries relational databases using SQL over a JDBC or ODBC connection.

(iii)Database reporting on NoSQL big data sources relies on a customized SQL connector, ETL solution, or another native way at accessing data.

(iv)With Logi Report, you have the flexibility to embed reports, dashboards, and visualizations created from any data source.

(1c)

(i) Click File > Print.

(ii) To preview each page, click the forward and backward arrows at the bottom of the page. If the text is too small to read, use the zoom slider at the bottom of the page to enlarge it.

(iii) Choose the number of copies, and any other options you want, and click the Print button.

===========================

(4ai)

Computer graphics deals with creation, manipulation and storage of different type of images and objects.

(4aii)

- Choose any 2

i. Computer Art

ii. Computer aided drawing.

iii. Presentation Graphics.

(4bii)

Interactive Fill tool: Interactive Fill tool to color the fish modified in other videos. To apply an interactive fill, click the Interactive Fill tool, click an object, and then drag. To change the fill colors, drag colors from the color palette to the square handles or to the fill path.

(4biii)

Texture Fill tool: A texture fill is a randomly generated fill that you can use to give your objects a natural appearance. You can use existing texture fills, such as water, minerals, and clouds, or you can edit a texture to create your own texture fill. You can use colors from any color model or palette.

(4iii)

Evenlope Tool: Envelope Tool is used to create and manipulate "control points" at various points in the track. The control points then determine its volume changes over time.

(4iv)

Extrude Tool: The Extrude tool is used in conjunction with an existing 2D shape or shapes in the scene. It allows you to create an extruded 3D shape from the selected 2D shape by defining various parameters.

(4ci)

Mesh fill tool

(4cii)

Interactive blend tool

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