Unit 2 Exam Revision

Question 1

What are the four stages of the problem solving methodology?

Answer 1

• Analysis
• Design
• Development
• Evaluation

Question 2

What does the analysis stage involve?

Answer 2

Establishing the root cause of the problem by identifying solution requirements, establishing solution constraints and defining the scope of the solution.

Question 3

What does the design stage involve?

Answer 3

Planning several alternatives and choosing the most appropriate one by creating the solution design and specifying the evaluation criteria.

Question 4

What does the development stage involve?

Answer 4

Creating the solution by manipulating or coding the solution, checking the accuracy of data input by validation, ensuring a solution works through testing and documentation that allows users to interact or use the solution.

Question 5

What does the evaluation stage involve?

Answer 5

Assessing a solution to ensure it has been successful by working out an evaluation strategy and reporting on the success of the solution.

Question 6

What are the characteristics of a project?

Answer 6

It has a clearly defined purpose, a starting time, a finite lifetime, a number of interdependent tasks.

Question 7

List the types of data visualisation that are commonly used.

Answer 7

• Comparison
• Distributions
• Relationships
• Composition

Question 8

When collecting data for analysis, errors can occur. What types of errors are these?

Answer 8

• Respondent error - When a person misunderstands a question and gives false data.
• Processing error - when the technique used to input the data, either manual entry or automatic entry using optical character recognition software, into the database makes a mistake.
• Partial response - when the person filling out the survey has only completed the part of the survey.
• Undercount - when not all of the respondents to the survey have completed the survey due to a range of reasons.

Question 9

What are design elements?

Answer 9

Factors that contribute to the appearance and functionality of the solution.

Question 10

List some design elements.

Answer 10

• Proportion
• Orientation
• Clarity and consistency
• Colour and contrast
• Usability and accessibility
• Appropriateness

Question 11

What is an array?

Answer 11

A variable where you can refer to many values by using the variable’s name and the index of the value.

Question 12

What is the difference between primary and secondary data?

Answer 12

Primary data is information that has not been analysed or processed in any way, whereas secondary data has been processed, interpreted or analysed in some way.