This document is a 3-page exam for a Human Computer Interaction course. It contains 4 parts testing students' knowledge of HCI concepts and principles. Part 1 has 6 true/false questions worth 1.5 points each about system design and interface factors. Part 2 contains 8 multiple choice questions worth 2 points each related to HCI influences, usability, and interaction terms. Part 3 requires discussing the importance of HCI for e-business systems, describing 4 interaction styles, explaining human characteristics for design, and differentiating between slips and mistakes as human errors. The exam is out of a total of 35% and covers a range of foundational HCI topics.

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BAHIR DAR UNIVERSITY, BIT FACULTY OF COMPUTING
Summer Extension, Mid Examinations, September 05, 2015
Itec3044: Human Computer Interaction
(Fourth Year IT Department) , Examiner: Desalegn Aweke wako
Time: 1:30 hours Max Marks: 35%
Name: .................................................................... ID.......................
Part1:(9 points) Mark the correct statements as True and the incorrect statements as False in
the space provided. Each question is worth 1.5 points.
_____(1) In interactive system development, the designer should understand the influences that
computer technology has on interaction.
_____(2) Identifying and understanding a user’s mental models is critical in design
_____(3) In reality, interaction is not affected by social and organizational context
_____(4) Norman’s model of interaction concentrates on the system’s communication through the
interface
_____(5) A multi-modal interactive system is a system that relies on the use of single or one mode of
communication channel to communicate with the machine.
_____(6) Poor Interface design Limits the actual usage of the system.
Part II: (16 Points) Answer the following questions in the space provided by choosing from
the given alternatives. Each question is worth 2 points.
____(1) .Which one is not true about Human computer interaction ?
a) It is the interaction between users and computers.
b) It is a discipline concerned with design, implementation, and evaluation of interactive system
c) It doesn't concern peoples and their experience
d) It makes people more productive and more satisfied with their work life.
____(2) Which of the following field is not an influence on HCI?
a) Computer science b) Biology c) Cognitive Psychology d) Ergonomics e) None
____(3) To create a usable system, the designer must always do the following.
a) Understand how people interact with computers
b) Identify the user’s level of knowledge and experience
c) Identify the user’s psychological characteristics
d) all of the above

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____(4) As the discipline of Human Factors/Ergonomics evolved, the HCI comprises:
a) elements or people having direct control over machines or tools
b) interface elements between the humans and non-human elements
c) elements, people, or other sources having some control over machines or tools
d) elements or people having indirect control over hardware
____(5) which one of the following is terms of Interaction?
a) Task b) Domain c) Goal d) All of the above
____(6)_____ is the difference between the user’s formulation of the actions to reach the goal and
the actions allowed by the system.
a) gulf of execution b) gulf of evaluation c) Slips d) Mistakes
____(7) Which part is not included in Abowd and Beale's interaction framework ?
a) User b) System c) Input d) output e) None of the above
____(8) _____is a predominant theoretical frameworks or scientific world views.
a) Interactivity b) Natural Language c) Paradigm d) None of the above
Part III. (10 Points) Answer the following problems by giving enough details.
(1) E-business systems are often customer based systems so the importance of human-computer
interaction in the design of web applications is high. Based on this Scenario discuss the importance
of Human computer Interaction (3pts).
(2) Describe briefly four different interaction styles used to accommodate the dialog between user and
computer? (3pts)

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(3) Human are complex organisms with a variety of attributes that have an influence on interface and
screen design. So, Explain the characteristics of human to be considered in design (3 pts).
(4) In HCI , human errors are classified into Slips and Mistakes. Explain the difference between those
two errors (2pts)