WAEC Computer Studies 2021 Answers

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WAEC Computer Questions and Answers 2021. , for the National examination council (June/July 2021. Computer Answers. This post will provide you with repeated questions as well as the answers to your WAEC Computer exam. This post will help you understand the WAEC Computer answers.


Computer Studies 2 (Essay) 2:00pm. –3:00pm.
Computer Studies 1 (Objective) 3:00pm. –4:00pm.


COMPUTER STUDIES:
1-10: BCACCBCBDC
11-20: BABAAACADD
21-30: DCDBCCAABD
31-40: AADBDBBBBA
41-50: ABABACACDC


(1a)
Reports in a database are the reports 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) Tables
(ii) chart
(iii) JSON document
(iv) Graph

(1c)
(i) Select the report that you want to print.
(ii) Click File
(iii) Then click Print.
(iv) On the Print area of the File options, click the Print option to open the Print dialog box.
(v) Change the page format setup or other print options or printer selection as needed.
(vi) And then click OK to print your report.


(4ai)
Computer graphics is a sub-field of computer science which studies methods for digitally synthesizing and manipulating visual content. In other words although the term often refers to the study of three-dimensional computer graphics, it also encompasses two-dimensional graphics and image processing.

(4aii)
(i)Computer Art
(ii)Computer aided drawing.

(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 tool 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.


(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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