BT9302, Human Computer Interface

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ASSIGNMENT

PROGRAM	BSc IT
SEMESTER	SIXTH
SUBJECT CODE & NAME	BT9302, Human Computer Interface
CREDITS	4
BK ID	B1364
MARKS	60

Note: Answer all questions. Kindly note that answers for 10 marks questions should be approximately of 400 words. Each question is followed by evaluation scheme.

Question. 1.List all the principles of designing graphical user interface. Explain any eight of them.

Answer:In computer science, a graphical user interface (GUI), is a type of user interface that allows users to interact with electronic devices through graphical icons and visual indicators such as secondary notation, instead of text-based user interfaces, typed command labels or text navigation. GUIs were introduced in reaction to the perceived steep learning curve of command-line interfaces (CLIs), which require commands to be typed on a computer keyboard.

The actions in a GUI

Question.2. Explain the phases in determining basic business functions.

Answer:Step 1 – Get Oriented

Often as business analysts we are expected to dive in to a project and start contributing as quickly as possible to make a positive impact. Sometimes the project is already underway. Other times there are vague notions about what the project is or why it exists. We face a lot of ambiguity as business analysts and it’s our job to clarify the scope, requirements, and business objectives as quickly as possible.

Step 2 – Discover

Question.3. Explain the uses of toolbars and message boxes in designing windows.

Answer:In computer interface design, a toolbaris a graphical control element on which on-screen buttons, icons, menus, or other input or output elements are placed. Toolbars are seen in many types of software such as office suites, graphics editors and web browsers. Toolbars are usually distinguished from palettes by their integration into the edges of the screen or larger windows, which results in wasted space if too

Variants and derivatives

There several user interface elements derived from toolbars:

·       Address bar, location bar or

·        

Question.4. Explain Goal-Operation-Methods-Selections (GOMS) user interface design approach. List advantages and disadvantages of it.

Answer:GOMS is a specialized human information processor model for human-computer interaction observation that describes a user's cognitive structure on four components. In the book The Psychology of Human Computer Interaction.written in 1983 by Stuart K. Card, Thomas P. Moran and Allen Newell, the authors introduce:

Qualification

Advantages: The GOMS approach to

Question.5. Briefly explain the features of different keyboard layouts. Describe the features of keys.

Answer:A keyboard layout is any specific mechanical, visual, or functional arrangement of the keys, legends, or key-meaning associations (respectively) of a computer, typewriter, or other typographic keyboard.

Mechanical layout: The placements and keys of a keyboard.

Visual layout: The arrangement of the legends (labels, markings, engravings) that appear on the keys of a keyboard.

Functional layout:

Question.6. Write a note on joystick and graphic tablet device based controls.

Answer:A joystick is an input device consisting of a stick that pivots on a base and reports its angle or direction to the device it is controlling. A joystick, also known as the control column, is the principal control device in the cockpit of many civilian and military aircraft, either as a center stick or side-stick. It often has supplementary switches to control various aspects of the aircraft's flight.

Joysticks are often used to control video games,

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