Queues Closure – Discussion

October 14, 2020October 14, 2020 vkungeLeave a comment

Queues have a head an a tail, also called a front and an end.
Queue operations are add, remove and peek . add and remove are also referred to as enqueue and dequeue.
When a queue is implemented with an array, what are the values of the head and tail at initialization?
The head and tail are updated during queue operations. During which operations are the following indices updated?
(a) head
(b) tail
Explain what is meant by the acronym FIFO.

Video Creation using Source files – Tutorial

October 13, 2020October 5, 2021 vkunge1 Comment

Today, we’re going to create the following video from some source files:

Download the following files to practice the skills :

https://drive.google.com/drive/folders/1f3m2gXDaPThljZ_fmc6OGMYzwpanht2Y

(the videos are free to use and were downloaded from https://pixabay.com/images/search/soccer/ )

Follow along with the tutorial video below to create a video from the source files above:

Tutorial Video: Video Creation with Video Editor in Windows 10

Remember to pause the video when needed during the creation of the video from the source files.

Updated:

5th October 2021 – Enhanced formatting

Flowcharts – Sequence

October 13, 2020November 18, 2021 vkungeLeave a comment

Sequential instructions refer to groups of instructions which follow a strict order. We can observe this by example:

Task: Create a program which prompts the user to enter two numbers. The program must out put the sum of the two numbers.

Solution in narrative form:

Prompt the user to enter the first number and accept the data. Prompt the user to enter a second number and accept the data. Calculate the sum. Output the sum to the user

Solution in Flowchart:

Notes/observations

Notice that to accomplish this task all steps are followed in sequence.
Variables are used as containers to store data input from the user and to store the results of processing for output. E.g num1, num2 for input storage, and result for storage and output.
the box which contains result <–num1+num2 can be interpreted as “adding the contents of num1 to num2 and then storing the value that was produced by processing in result
the line result <–num1+num2 can also be written as result = num1+num2

See the solution in flowgorithm below:

You can download the flowgorithm solution here:

https://drive.google.com/file/d/1s_QRRC-kx6Q-8NA3C__42xCn_-CpumA2/view?usp=sharing

Homework: Draw a flowcharts which accomplish the following tasks

1. Prompt the user to enter 3 numbers and output the sum

2. Prompt the user the enter 2 numbers and output the product

3 Prompt the user to enter 2 numbers and outputs the quotient (first number divided by the second number.) . What happens if the user enters the first number as 5 and the second number as 0 ?

Update

Updated on 18/11/2021 to include section “Notes observations” and 3 additional observations other than the first listed item.

Flowcharts – Representation

October 13, 2020September 12, 2025 vkungeLeave a comment

Flowcharts are graphical representation of algorithms. They consist of shapes which contain instructions that can be followed. The order of execution of instructions is determined by arrows which start from the “Start” shape, move onto other intermediate shapes until execution stops at the “End” shape.

The shapes used are shown below:

We will observe how these symbols are used to represent the solution to a problem in our next post on Sequence.

Live Class

Algorithms review, Introduction to Flowcharts (Live Class – 2025-09-12)

Updates to this post

2025-09-12: Added live class section

Formulas and Functions – Part 2 (Video)

October 11, 2020 vkungeLeave a comment

This series of videos is a continuation of the post, Formulas and Functions – Part 1 (Class Video)

Use this file and follow along with the videos, pausing the video when you need to accomplish a task:

tutorial03 Download

It 5 videos covering the following functions: Max, Min, Count, Countif, Rank, and Vlookup.

A 6th function, PMT was left for your research and homework.

See the videos below, and follow the instructions for homework based on the pmt function:

Max and Min

Count

Countif

Rank

Vlookup

PMT

Homework – Research/examine the PMT function.

Explain :

The functions’ parameters.
The purpose of the function.

We will be discussing this function at our next class.

Formulas and Functions – Part 1 (Class Video)

October 8, 2020October 10, 2020 vkunge1 Comment

This is a recording of class made on the 8th october 2020. This video demonstrates skills that were learnt and practised in class. Use this video for review, skip through parts that are not relevant to you , just pay attention to the skills!

The video below was captured during a repeat of the class above. FYI:

Spreadsheets: Introduction, definition & terminology

October 5, 2020January 11, 2021 vkungeLeave a comment

See the video below which introduces spreadsheet software

Terminology

Spreadsheet – an electronic document in which data is arranged in the rows and columns of a grid and can be manipulated and used in calculations.

Oxford English Dictionary via google. (https://www.google.com/search?q=define+spreadsheet&oq=define+spreadsheet&aqs=chrome..69i57j0l7.4183j1j7&sourceid=chrome&ie=UTF-8)

A Spreadsheet consists as a grid of many cells.

Cell – A single location in a spreadsheet that can store data. It is the intersection of a row and column

row – A horizontal arrangement of cells , usually denoted by a number

column – a vertical arrangement of cells ,usually denoted by a letter, cell,

value – the data that is stored in a cell.

formula – a representation for a calculation stored within a cell. The formula itself is not displayed, rather, the results of the calculation is displayed in the cell.

range – a group of cells; can be a group of horizontal cells, a group of vertical cells, a block of cells, or even many different blocks of cells.

worksheet – a single spreadsheet in a workbook.

workbook – a file , consisting of many worksheets (individual spreadsheets). A workbook is a file which is comprised of 1 or more worksheets (spreadsheets)

(last updated Monday 11th January 2021)

Queue Exercise

October 2, 2020November 20, 2020 vkungeLeave a comment

Implement a Queue with a maximum size of 5 elements using flowgorithm or a C program. The program must continuously prompt the user for an option:

add -if the user enters add, prompt the user to enter an integer and add it to the back of the queue.

remove -if the user enters remove, display the integer at the front of the queue and remove it

peek – If the user enters peek, display the integer at the front of the queue

exit – exits the program.

Use the following template in flowgorithm if necessary:

https://drive.google.com/file/d/1wFmReWDQbIYKV8z4kNXYvs9XarPIvnoo/view?usp=sharing

Website (wordpress) Assignment Submission Via Google Classroom

September 28, 2020September 28, 2020 vkungeLeave a comment

See this video on how to submit a link to your wordpress website for this week’s assignment.

Videos:Input/Output Devices

September 28, 2020September 23, 2021 vkungeLeave a comment

See the following objective content and related videos

These videos were chosen for each topic because they cover the subject matter in a relevant context. They definitely were not created specifically for the CSEC Syllabus, however , they do address the fundamental concepts in real world scenarios.

6. select appropriate input/output devices to meet the needs of specified applications;

Associate the following devices with suitable applications:

(a) Input: Optical mark reader (OMR), character readers (OCR, MICR), mouse, joystick, bar code reader, document scanner, light-pen, touch terminals, voice response unit, Touch Screens (tablets, point of sale, ATM), keyboard, digital camera, biometric systems, sensors, remote control, sound capture, pointing devices, webcam.

(b) Visual output: Monitors, Printers (laser, inkjet, dot matrix, thermal, plotters, 3D Printers), microfilm.

(c) Audible output: speakers, headphones, earphones.

Updated 21st Sept 2021: Added link to light pen.

Updated 23st Sept 2021: Added link to printers, laser, impact printers, dot matrix, thermal, microfilm, microfiche .

Island Class

Learning in the Caribbean

Author: vkunge