Understanding the purpose of defensive design

• Defensive design anticipates and handles errors, whereas non-defensive design assumes inputs are always valid
• What does defensive design in computer science aim to make programs more reliable and robust?

  Handle errors and invalid inputs
• Implementing defensive design is crucial for creating user-friendly software that can withstand real-world usage.


  True
• Arrange the key benefits of defensive design in order of importance for software robustness.

  1️⃣ Increased Reliability

  2️⃣ Reduced Crashes

  3️⃣ Enhanced User Experience

  4️⃣ Simplified Debugging
• By anticipating and addressing errors, defensive design increases software reliability
• Defensive design requires more upfront planning but is simpler to implement initially
• Match the benefits of defensive design with their descriptions.

  Increased Reliability ↔️ Consistent software performance

  Enhanced User Experience ↔️ Graceful error messages
• Defensive design simplifies debugging by managing errors upfront.


  True
• Which defensive design technique is used to protect against invalid user input?

  Input validation
• A race condition occurs when concurrent processes access and modify shared data
• Which mechanisms are used to handle common threats in defensive design?

  Input validation, memory management, synchronization mechanisms, and security checks
• Defensive design protects against threats such as invalid user input, buffer overflows, race conditions, and security vulnerabilities
• Compare defensive design with non-defensive design:

  Defensive Design ↔️ Anticipates and handles errors

  Non-Defensive Design ↔️ Assumes inputs are always valid
• What are the four common threats addressed by defensive design?

  Invalid user input, buffer overflows, race conditions, and security vulnerabilities
• Defensive design improves program reliability
• What are the key benefits of defensive design for software development?

  Increased reliability, reduced crashes, enhanced user experience, and simplified debugging
• What is one primary goal of defensive design in software development?

  Increased reliability
• Match the defensive design threat with its protection mechanism:

  Invalid User Input ↔️ Input validation

  Buffer Overflow ↔️ Memory management

  Race Condition ↔️ Synchronization mechanisms

  Security Vulnerability ↔️ Security checks
• What is the purpose of input validation in defensive design?

  Ensure data integrity
• Why is least privilege a key principle in defensive design?

  Enhance security
• Match the defensive design technique with its purpose:

  Input Validation ↔️ Ensure data integrity

  Error Handling ↔️ Manage errors

  Exception Handling ↔️ Catch exceptions

  Logging ↔️ Record program events
• Why is defensive design crucial for software robustness?

  Handles errors and unexpected inputs
• Match the characteristics of defensive and non-defensive design.

  Defensive Design ↔️ Handles errors

  Non-Defensive Design ↔️ Assumes valid inputs
• What is the goal of defensive design in computer science?

  Gracefully handle unexpected situations
• Why is defensive design important for software robustness?

  Ensures correct functioning under errors
• What is a key characteristic of defensive design that enhances user experience?

  Graceful error handling
• Defensive design aims to protect against invalid user input, buffer overflows, race conditions, and security vulnerabilities
• What is a buffer overflow in defensive design?

  Exceeding allocated memory
• Security vulnerabilities are weaknesses that attackers can exploit


  True
• Match the defensive design threat with its protection mechanism:

  Invalid User Input ↔️ Input validation

  Buffer Overflow ↔️ Memory management

  Race Condition ↔️ Synchronization mechanisms

  Security Vulnerability ↔️ Security checks
• Defensive design aims to create programs that can gracefully handle unexpected situations


  True
• Defensive design is crucial for creating high-quality, user-friendly software that can withstand real-world usage
• Defensive design focuses on creating programs that can gracefully handle unexpected situations


  True
• Key benefits of defensive design

  1️⃣ Increased reliability

  2️⃣ Reduced crashes

  3️⃣ Enhanced user experience

  4️⃣ Simplified debugging
• Defensive design ensures software robustness by handling errors and unexpected inputs


  True
• Defensive design enhances the user experience by providing graceful error messages and handling
• Defensive design principles aim to prevent errors and handle unexpected situations gracefully

  True
• Error handling in defensive design uses try-catch blocks
• Defensive design techniques are implemented to prevent and handle potential errors


  True