CDT Performance Optimization 1 — Questions and Answers
Question 1: What is the first step in performance optimization?
- Establish baseline measurements and identify bottlenecks (Correct answer)
- Upgrade all hardware immediately
- Add more resources without analysis
- Optimize everything simultaneously
Correct answer: Establish baseline measurements and identify bottlenecks
Establishing baselines and identifying bottlenecks ensures optimization efforts target actual performance issues rather than assumed problems.
Question 2: Why is monitoring important for performance management?
- It provides real-time visibility into system behavior and early warning of issues (Correct answer)
- It is only needed during initial setup
- It uses too many resources to be practical
- It only benefits large-scale systems
Correct answer: It provides real-time visibility into system behavior and early warning of issues
Continuous monitoring provides real-time visibility, enables proactive issue detection, and supplies data for informed optimization decisions.
Question 3: What is the 80/20 rule as applied to performance optimization?
- 80% of performance gains come from optimizing 20% of the code or configuration (Correct answer)
- Spend 80% of time optimizing and 20% testing
- Optimize 80% of components and ignore 20%
- Performance should be 80% of the project budget
Correct answer: 80% of performance gains come from optimizing 20% of the code or configuration
The 80/20 rule (Pareto principle) in optimization means focusing on the critical 20% of areas that will yield 80% of performance improvements, maximizing efficiency.
Question 4: When should performance testing be conducted?
- Throughout the development lifecycle and before major releases (Correct answer)
- Only after receiving user complaints
- Once during initial deployment only
- Only for applications with more than 1000 users
Correct answer: Throughout the development lifecycle and before major releases
Performance testing throughout the lifecycle catches issues early when they are cheaper to fix and prevents performance regressions in new releases.
Question 5: What is capacity planning?
- Predicting future resource needs based on growth trends and requirements (Correct answer)
- Buying maximum resources upfront
- Only planning for current usage levels
- Waiting until resources are exhausted to add more
Correct answer: Predicting future resource needs based on growth trends and requirements
Capacity planning uses growth trends and requirements to predict future needs, ensuring adequate resources are available without over-provisioning.
Question 6: How do you determine if an optimization was successful?
- Compare post-optimization metrics against the established baseline (Correct answer)
- Rely on subjective user feedback
- Check if the system is still running
- Assume success if no errors occur
Correct answer: Compare post-optimization metrics against the established baseline
Comparing post-optimization metrics against established baselines provides objective evidence of improvement and quantifies the impact of changes.
CDT Performance Optimization 1
What is the first step in performance optimization?