Computer Science: Human-Computer Interaction

What does perceived performance primarily refer to?

Which of the following components typically displays information about task duration?

What is the primary focus of performance considerations during infrastructure design?

How would you describe calculating performance in the design phase?

When should performance be considered during system development?

In which situation is performance particularly crucial?

What do benchmarks typically measure?

What is NOT typically considered in benchmarks?

What is the most reliable way to determine performance during the design phase?

Why are vendors able to provide valuable tools and figures for performance metrics?

What is another term for prototyping?

What parts of a system does prototyping focus on?

How does user profiling help predict the load on infrastructure?

Which of the following is NOT a step in user profiling?

How can capacity be adjusted in scalable cloud environments?

What is a common feature of cloud environments?

Perceived performance refers to how quickly a system appears to perform its task.
Splash screens help inform users about task duration.

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 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 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 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.

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.

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.