16 Questions
What does perceived performance primarily refer to?
How quickly a system appears to perform its task
Which of the following components typically displays information about task duration?
Splash screens
What is the primary focus of performance considerations during infrastructure design?
Meeting performance requirements
How would you describe calculating performance in the design phase?
Extremely difficult and very unreliable
When should performance be considered during system development?
When the system is working as expected
In which situation is performance particularly crucial?
When the system has failing parts
What do benchmarks typically measure?
Relative performance of an infrastructure component
What is NOT typically considered in benchmarks?
User interface design
What is the most reliable way to determine performance during the design phase?
Vendor experience
Why are vendors able to provide valuable tools and figures for performance metrics?
They have extensive experience running their products
What is another term for prototyping?
Proof of concept
What parts of a system does prototyping focus on?
Parts that pose the highest risk
How does user profiling help predict the load on infrastructure?
By estimating usage before it is built
Which of the following is NOT a step in user profiling?
Increase network bandwidth
How can capacity be adjusted in scalable cloud environments?
By scaling up or down based on usage
What is a common feature of cloud environments?
Logging and monitoring capabilities
Study Notes
Perceived Performance
- Perceived performance refers to how quickly a system appears to perform its task.
- Splash screens help inform users about task duration.
Performance During Infrastructure Design
- A solution must be designed, implemented, and supported to meet performance requirements.
- Calculating performance of a system in the design phase is extremely difficult and very unreliable.
Performance Considerations
- Performance must be considered when the system is working as expected.
- Performance must also be considered in the special state when the system is failing or has failing parts.
Benchmarking
- Benchmarking uses a specific test program to assess the relative performance of an infrastructure component.
- User interface design is not typically considered in benchmarks.
- Benchmarks often measure factors such as floating point operations per second and million instructions per second.
Vendor Experience
- Vendor experience is the best way to determine performance during the design phase.
- Vendors can provide tools, figures, and best practices because they have extensive experience running their products.
Prototyping
- Prototyping is also known as proof of concept.
- Prototyping focuses on parts of the system that pose the highest risk.
User Profiling
- User profiling helps predict the load on infrastructure by estimating usage before it is built.
- User profiling involves defining user groups, creating tasks for personas, and estimating the load per action.
Scalable Cloud Environments
- In scalable cloud environments, capacity can be adjusted by scaling up or down based on usage.
- Cloud environments often have extensive logging and monitoring capabilities.
Quiz on human-computer interaction concepts, including perceived performance and user experience.
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