Lesson Outcomes
After completing this practical lesson, learners will be able to:
- Explain programming errors and exceptions
- Identify syntax, logic, and runtime errors
- Apply error handling techniques
- Create programs with exception handling
- Debug and correct program errors
- Test program reliability after corrections
Overview
Errors are common during software development and Robotic Process Automation (RPA) processes. Effective error handling improves system stability, reliability, and user experience by preventing unexpected program failures.
This practical lesson introduces learners to error identification, exception handling, debugging, logging, and corrective techniques within programming environments. Learners will complete practical activities involving detecting, handling, correcting, and testing programming errors.
Scenario: Automated Learner Registration System
A software development company is building an automated learner registration application. During testing, the system experiences invalid inputs, missing data, and calculation failures that interrupt execution.
Learners are required to identify errors, apply error handling mechanisms, and ensure the application executes correctly after corrections.
PA1301 — Identify Programming Errors
Tools/Resources
- IDE or coding environment
- Error logs
- Debugging tools
Activity Instructions
- Execute provided programs.
- Identify syntax, logic, and runtime errors.
- Record the error messages.
- Save all findings.
Expected Outcome
Programming errors are identified correctly.
Evidence Required
- Screenshot of error messages
- Screenshot of incorrect program execution
PA1302 — Correct Syntax and Logic Errors
Tools/Resources
- IDE
- Debugging tools
- Programming documentation
Activity Instructions
- Review incorrect program code.
- Correct syntax-related errors.
- Correct logical processing errors.
- Execute the corrected program.
Expected Outcome
Syntax and logic errors are corrected successfully.
Evidence Required
- Screenshot of corrected code
- Screenshot of successful execution
PA1303 — Apply Exception Handling
Tools/Resources
- IDE
- Programming language documentation
- Notebook
Activity Instructions
- Create programs with exception handling.
- Prevent program crashes caused by invalid input or processing failures.
- Display suitable error messages.
- Verify program execution.
Expected Outcome
Programs handle exceptions correctly without unexpected termination.
Evidence Required
- Screenshot of exception handling code
- Screenshot of handled error outputs
PA1304 — Test Program Reliability
Tools/Resources
- IDE
- Test data
- Debugging tools
Activity Instructions
- Test programs using valid and invalid data.
- Verify that error handling executes correctly.
- Record all test results.
- Save completed work.
Expected Outcome
Programs execute reliably after testing and corrections.
Evidence Required
- Screenshot of test results
- Screenshot of verified outputs
PA1305 — Debug and Verify Corrected Programs
Tools/Resources
- IDE
- Error logs
- Debugging tools
Activity Instructions
- Review corrected programs.
- Debug any remaining issues.
- Execute the final application.
- Verify successful operation.
Expected Outcome
Programs are debugged and verified successfully.
Evidence Required
- Screenshot of debugging activities
- Screenshot of successful program execution
Key Notes
- Syntax errors prevent programs from running correctly.
- Logic errors produce incorrect outputs.
- Runtime errors occur during execution.
- Exception handling improves reliability.
- Debugging helps identify and correct problems.
- Testing improves application stability.