2.3 robust programs

• What is authentication in programming?

  A method to verify user identity
• What does authentication allow a program to do?

  Access the program for verified users
• What do users typically provide for authentication?

  Username and password
• What are the three main authentication factors?

  Knowledge, possession, and biometrics
• What is an example of something you know in authentication?

  Password or secret answer
• What is an example of something you have in authentication?

  Smart card or mobile phone app
• What is an example of something you are in authentication?

  Face recognition or fingerprint
• What is two-factor authentication?

  Using two different authentication factors
• What is a logic error in programming?

  An error in program operation
• What can cause a logic error?

  Incorrect use of operators
• Can a program run with logic errors?

  Yes, but it won't function correctly
• What is a syntax error?

  A mistake in code writing rules
• What can cause a syntax error?

  Misspelling or missing brackets
• Will a program run if there are syntax errors?

  No, it will not run
• What is input validation?

  Checking user inputs for correctness
• Why is input validation important?

  To prevent program crashes from incorrect data
• What is a range check in input validation?

  Ensuring input is within a specified range
• What is a length check in input validation?

  Ensuring input is not too long or short
• What is a presence check in input validation?

  Ensuring input is provided
• What is a format check in input validation?

  Ensuring data is in a specific format
• What is a type check in input validation?

  Ensuring data is of a specific type
• Will validation catch all errors?

  No, users may still make typos
• What does verification require from the user?

  Entering key twice for accuracy
• What is good practice in programming?

  • Use meaningful variable names
  • Check user inputs for validity
  • Implement access control based on roles
• What is bad practice in programming?

  • Using vague variable names
  • Allowing unrestricted access based on username only
  • Not validating user inputs
• What does a test plan provide?

  Structure to testing and records results
• What types of data should be used in testing?

  Normal, boundary, invalid, and erroneous data
• What is normal data in testing?

  Correct data typically inputted by users
• What is boundary data in testing?

  Correct data at the outermost limits
• What is invalid data in testing?

  Data that is too large or small
• What is erroneous data in testing?

  Completely incorrect data
• What is the purpose of indentation in code?

  To group code within functions or procedures
• How does indentation help in programming?

  Makes code easier to read and understand
• What are comments in code?

  Lines that do not execute and explain code
• What do comments help with in programming?

  Explain functionality and prevent accidental deletion
• What is the purpose of testing in programming?

  To locate and remove errors in code
• When does testing take place?

  While the program is being written
• What happens if an error is found during testing?

  It is fixed and retested
• What is smaller testing?

  A final check after code completion
• Why is smaller testing harder?

  Due to the amount of code