Lesson Notes By Weeks and Term v5 - Grade 11

Lesson Video

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Performance objectives

• Trace and debug algorithms with selection and repetition.
• Design and implement simple SQL database queries.
• Evaluate ethical and societal implications of IT, like cyber security.
• Apply object-oriented programming (OOP) principles.

Lesson summary

This week's focus is on integrated revision and exam preparation. This is crucial because success in IT isn't just about memorising facts, but about understanding how different concepts fit together and applying that knowledge to solve problems, much like how various technologies work together to solve problems in our communities and the wider world. Think about how cellphone networks connect people across vast distances, or how banking apps allow secure financial transactions. Understanding the underlying principles empowers you to not only pass your exams but also to become innovative problem-solvers.

Lesson notes

2.1 Algorithm Tracing and Debugging Tracing algorithms involves stepping through the code line by line, keeping track of the values of variables as they change. This is essential for understanding how an algorithm works and for identifying errors (bugs). A trace table is a useful tool for this. Debugging is the process of finding and correcting these errors. Common errors include logic errors (the program runs but doesn't produce the correct result) and syntax errors (the program doesn't run at all due to incorrect grammar).

Selection (If Statements): `if` statements allow a program to make decisions based on conditions.

Repetition (Loops): `for` and `while` loops allow a program to repeat a block of code multiple times.