Chapter 27

Question 1

What are types of web applications

Answer 1

• Information-oriented sites
• Transaction-oriented sites
• Portals

Question 2

What attributes can have Information-oriented sites

Answer 2

• Sovereign attributes

- Transient attributes

Question 3

What attributes can have Transaction-oriented sites

Answer 3

• Sovereign attributes

- Transient attributes

Question 4

What are kiosks

Answer 4

These are screens where we can view information or can do transactions. e.g. ATM machines

Question 5

What is the posture of kiosks

Answer 5

Transient posture

Question 6

What is the posture of handheld devices

Answer 6

Transient posture

Question 7

What is the posture of appliances e.g. oven

Answer 7

Transient posture

Question 8

What is flow

Answer 8

When people can concentrate wholeheartedly on an activity it is known as flow.

Question 9

What is transparency

Answer 9

Interface must not unnecessarily call attention towards itself.

Question 10

How to make an interface invisible

Answer 10

• Follow mental models
• Direct, do not discuss
• Keep tools close at hand
• Mode-less feedback

Question 11

What are mental models

Answer 11

Show user only relevant information.

Question 12

What is model and mode-less feedback

Answer 12

A dialogue box in work telling word count is model feedback.

A status bar in word showing statistical information.

Question 13

What is orchestration

Answer 13

Designer should be invisible in an interface. Orchestration means harmonious organization.

Question 14

How we can improve orchestration

Answer 14

• Adding fineness
• Distinguishing possibility from probability
• Providing comparisons
• Using graphical input
• Reflecting program status
• Avoiding unnecessary reporting
• Avoiding blank slates
• Command invocation vs configuration
• asking less questions
• hiding ejector seat levers