Software Development

Question 1

Life cycle

Answer 1

Analysis
Design
Implementation
Evaluation
Maintenance
Repeat

Question 2

Waterfall model

Answer 2

Similar to lifecycle but customer only sees final product:
Analysis
Design
Implementation
Evaluation
Maintenance

Question 3

2 types of software

Answer 3

Application and system

Question 4

3 elements of implementation

Answer 4

Programming, testing, installing

Question 5

System specification

Answer 5

AKA user requirements document, defines what system will do but not how it will do it

Question 6

Black box testing

Answer 6

Looks at program specification and creates a set of test data that covers all the input, outputs and program functions independently of the code

Question 7

White box testing

Answer 7

Tests devised to test each path through the code at least once to find logic errors

Question 8

Alpha testing

Answer 8

In-house software developers reveal errors/omissions in definition of system requirements

Question 9

Beta testing

Answer 9

Software given to a number of potential users who agree to use the software and report any faults

Question 10

Acceptance testing

Answer 10

AKA evaluation, user must test every aspect of the software and compare it to the original specification

Question 11

Types of maintenance

Answer 11

Corrective, adaptive & perfective

Question 12

Corrective maintenance

Answer 12

Fixing bugs

Question 13

Adaptive maintenance

Answer 13

Altering to match new user requirements

Question 14

Perfective maintenance

Answer 14

Making software faster, easier to use, more functional etc

Question 15

Spiral method

Question 16

Agile method

Question 17

Extreme programming

Answer 17

Frequent releases of software made in short development cycles intended to improve productivity & responsiveness to changing customer requirements

Question 18

5 things that can go wrong in a large project

Answer 18

• Personnel change
• Requirements change
• Technology advances
• Costs spiral upwards
• Project gets cancelled

Question 19

A good algorithm… (5)

Answer 19

• Has clear and precisely stated steps that produce correct output for any set of valid inputs
• Should allow for user inputs
• Must terminate at some point
• Should perform task efficiently in as few steps as possible
• Should be designed in a way that is easy to understand and modify

Question 20

Bubble sort

Answer 20

Starting with the first item compare it with the next item and swap if the first was bigger. Continue along the list. Repeat until all items are in order. Check 1 final time

Question 21

Linear search algorithm

Answer 21

The algorithm systematically searches every item until it finds what it’s looking for

Question 22

Binary search algorithm

Answer 22

In a sorted list, the algorithm halves the search area every time an item is examined