The A* Search algorithm (pronounced “A star”) is an alternative to the Dijkstra’s Shortest Path algorithm. It is used to find the shortest path between two nodes of a weighted graph. The A* Search algorithm performs better than the Dijkstra’s…
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Dijkstra’s Shortest Path Algorithm
Dijkstra’s Shortest Path Algorithm is an algorithm used to find the shortest path between two nodes of a weighted graph. Before investigating this algorithm make sure you are familiar with the terminology used when describing Graphs in Computer Science. Let’s…
Boolean Algebra
In this blog post we are investigating different formulas than can be used to simplify a Boolean expression. Double Negation ¬ ¬A = A Complement Laws A ∧ ¬A = 0 A ∨ ¬A = 1 Idempotent Laws A ∧…
Big O Notation
The question we will try to answer in this blog post is as follows: How can we measure the effectiveness/performance of an algorithm? First let’s consider this quote from Bill Gates (Founder of Microsoft): “Measuring programming progress by lines of…
Graph Terminology
Graphs are a data structure that can be used in computer science in a variety of context. You can check the following Python challenges which are all being solved using a graph and a short path algorithm, one of the…
Network Security – Terminology
Click on the picture below to check your knowledge of key Network Security concepts: Forms of attacks, threats and approaches to secure a network.
Random Access Memory using Logic Gates
In our previous blog post, “Binary Additions using Logic Gates”, we investigated how logic gates can be used together to create a circuit used in the ALU (Arithmetic & Logic Unit of the CPU) to add two binary numbers together.…
Binary Additions using Logic Gates
In our previous blog post “from transistors to processors” we found out that the CPU consists of logic gates, which are made using transistors. In this blog post we are looking at how these logic gates can be combined to…
From transistors to micro-processors
Vacuum Tubes and Transistors: Many consider the transistor to be one of the most important inventions of all time. Though the precursors of the transistor were invented in 1907 (at the time they were not transistors yet, they were vacuum…
Air Flight Route Planner
For this challenge you will use a graph data structure to create an Air Fligh Route Planner for a fictitious airline company offering flights across Europe. Here is a map showing all the direct flights offered by this airline company:…
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