Software Design Life Cycle

Question 1

SDLC

Answer 1

Software Design Life Cycle

Question 2

What are the 7 stages of SDLC

Answer 2

Planning
Analysis
Design
Development
Test
Deployment
Operations and Maintenance

Question 3

What are Functional requirements?

Answer 3

Describes a function the software must perform.
Helps capture intended behaviour.
Requirements stated by the user which can be seen directly in the final product

Question 4

What are non-functional requirements?

Answer 4

Quality attributes of a software system. 
Helps ensure good UX.
Portability
Security
Maintainability
Reliability
Flexibility
Scalability
Performance
Reusability

Question 5

TDD - Technical Design Document

Answer 5

written by development team.
describes in detail the entire or parts of design:
interface, data types and structures, detailed designs

Question 6

SRS - Software Requirement Specification

Answer 6

Assessing user requirements.
More specific and details requirements in software terms.
Output can be directly used into implementation in programming languages

Question 7

SSD - System Sequence diagram

Answer 7

shows the events that external actors generate, their order, and possible inter-system events of a particular scenario of a use case

Question 8

SRS

Answer 8

Software Requirement Specification

Question 9

SSD

Answer 9

System Sequence Diagram

Question 10

TDD

Answer 10

Technical Design Document

Question 11

Actor

Answer 11

Anyone who interacts with the system

Question 12

Objects

Answer 12

Are entities with attributes and methods.

Question 13

Classes

Answer 13

Generalised description of an object. Defines attributes and methods an object can have.

Question 14

Messages

Answer 14

Consist of the identity of the target object, the name of the requested method and any other action needed (arguments)

Question 15

Abstraction

Answer 15

an abstraction relates to the observable behaviour - how an object and its behaviours are presented to the user

Handles complexity by hiding internal implementation details. Just need to know what methods are available and which input parameters are needed.

Question 16

Encapsulation

Answer 16

encapsulation is the implementation which helps create the experience of abstraction

Data and methods bundles into a single unit e.g. class
Also refer to a mechanism of restricting direct access to components of an object

Question 17

Inheritance

Answer 17

one class gaining properties of another class. Allows programmers to create a new class that reuses variables and functions from another class

Question 18

Polymorphism

Answer 18

refers to the ability of variable, function or object to take on multiple forms.

Question 19

Multi-tier architecture

Answer 19

where a program is separated into three or more computers in a distributed network.