Building Robust Programs with Defensive Design and Validation

Building Robust Programs with Defensive Design and Validation

Learning Objectives

At the end of the lesson, you will be able to understand the importance of defensive design and validation in building robust programs.

Introduce the learning objectives to the students and explain how each objective will be achieved.

What do you already know about programming and designing robust programs?

What is programming?

Programming is the process of creating software applications using one or more programming languages.

Explain the concept of programming and give examples of programming languages.

What is a Robust Program?

A robust program is a program that can handle unexpected inputs, errors, and other exceptional situations.

Explain the concept of a robust program and give examples of robust programs.

Why is Defensive Design important?

Defensive design is important to prevent errors and unexpected inputs from causing program failures.

Explain the importance of defensive design and give examples of how it can be implemented.

What are some examples of defensive design?

1. Vague and confusing instructions
2. Clear and concise instructions
3. Error messages with solutions
4. No error messages at all

Why is defensive design important?

1. It makes the design process faster
2. It improves user experience and reduces errors
3. It makes the design look more professional
4. It is a trend in the design industry

What is defensive design?

1. Designing to prevent errors and problems
2. Designing without considering users
3. Designing to create errors and problems
4. Designing for aesthetic purposes only

What is Validation?

Validation is the process of checking whether the input data is correct and meets the expected format and requirements.

Explain the concept of validation and give examples of how it can be implemented.

Types of Validation

There are different types of validation such as data validation, form validation, and input validation.

Explain the different types of validation and give examples of each.

Data Validation

Data validation is the process of checking whether the data is correct and meets the expected format and requirements.

Explain the concept of data validation and give examples of how it can be implemented.

Form Validation

Form validation is the process of checking whether the form data is correct and meets the expected format and requirements.

Explain the concept of form validation and give examples of how it can be implemented.

Input Validation

Input validation is the process of checking whether the input data is correct and meets the expected format and requirements.

Explain the concept of input validation and give examples of how it can be implemented.

Input Validation Techniques

There are different techniques for input validation such as length validation, range validation, and type validation.

Explain the different techniques for input validation and give examples of each.

Length Validation

Length validation is the process of checking whether the input data has the expected length.

Explain the concept of length validation and give examples of how it can be implemented.

Range Validation

Range validation is the process of checking whether the input data is in the expected range.

Explain the concept of range validation and give examples of how it can be implemented.

Type Validation

Type validation is the process of checking whether the input data has the expected type.

Explain the concept of type validation and give examples of how it can be implemented.

Error Handling

Error handling is the process of dealing with errors and exceptional situations in the program.

Explain the concept of error handling and give examples of how it can be implemented.

Exception Handling

Exception handling is the process of dealing with unexpected errors and exceptional situations in the program.

Explain the concept of exception handling and give examples of how it can be implemented.

Try-Catch Block

The try-catch block is a programming construct for handling exceptions and errors in the program.

Explain the concept of try-catch block and give examples of how it can be implemented.

Debugging

Debugging is the process of finding and fixing errors and bugs in the program.

Explain the concept of debugging and give examples of how it can be implemented.

Debugging Techniques

There are different techniques for debugging such as print statements, breakpoints, and logging.

Explain the different techniques for debugging and give examples of each.

Print Statements

Print statements are statements that print the value of a variable or an expression to the console for debugging purposes.

Explain the concept of print statements and give examples of how it can be implemented.

Breakpoints

Breakpoints are markers in the code that pause the program execution for debugging purposes.

Explain the concept of breakpoints and give examples of how it can be implemented.

Logging

Logging is the process of writing messages to a log file for debugging and analysis purposes.

Explain the concept of logging and give examples of how it can be implemented.

Write down 3 things you learned in this lesson.

Have students enter three things they learned in this lesson. With this they can indicate their own learning efficiency of this lesson.

Write down 2 things you want to know more about.

Here, students enter two things they would like to know more about. This not only increases involvement, but also gives them more ownership.

Ask 1 question about something you haven't quite understood yet.

The students indicate here (in question form) with which part of the material they still have difficulty. For the teacher, this not only provides insight into the extent to which the students understand/master the material, but also a good starting point for the next lesson.