Computer Grade 11 PDF

## Unit Introduction Computer systems are used to solve real-world problems relevant to any topic or aspect of our life. For example: education, healthcare, transportation, economics. A problem is a challenge or situation for which a solution is required. The process of analyzing that situation and...

## Unit Introduction Computer systems are used to solve real-world problems relevant to any topic or aspect of our life. For example: education, healthcare, transportation, economics. A problem is a challenge or situation for which a solution is required. The process of analyzing that situation and accordingly handling it is referred to as problem-solving. Computational thinking is a thought process that helps us to understand the problem and solve it in a way that computers do. Computational thinking requires understanding the capabilities of computers. For example, computers process the input in a faster and reliable way, and it works by following the input-process-output model. To solve problems in any field, including computer science, we can apply computational thinking. The solution of a problem where computational thinking is applied uses the following properties: * **Abstraction:** Simplifying a problem or system by focusing on the most relevant aspects while ignoring unnecessary details. It is about looking at the big picture without getting lost in the tiny details. **Consider the task of creating a website** Abstraction is to focus on the main design and functionality without getting into the coding details. Think about the layout, colour scheme, and user interaction, rather than every line of code. * **Decomposition:** Breaking down a complex problem into smaller, more manageable sub-problems or tasks. ### **Computational Thinking Steps** * Abstraction * Decomposition * Pattern Recognition ## Linear vs. Binary Search The choice of searching algorithm depends on the specific requirements of your problem. However, following are some generic guidelines that could be helpful while selecting any searching algorithm: | | Linear Search | Binary Search | |:-----------:|:-----------------|:--------------------| | **When to Use** | When the list is not sorted | When the list is sorted | | | Suitable for a smaller number of elements | Ideal for larger number of elements | ### **Example: Movie Streaming** **Choosing a movie to watch from a list:** * **Linear Search:** Start from the top and scroll down until you find the movie. * **Binary Search:** Divide the list in half, quickly narrowing down the options. **Algorithm Evaluation -> Efficiency:** The time it takes to find a movie reflects the efficiency of the search algorithm. ## Teacher's Guide * **“CodeCombat: Learn to Code by Playing a Game"** * https://codecombat.com/ This resource transforms the learning experience into a game, where students can grasp programming concepts through an entertaining role-playing adventure. The game effectively introduces fundamental coding logic, which can be applied to comprehend search and sort algorithms.