Software Engineering 4

Question 1

• Boehm’s spiral model,
• the spiral development model,
• the risk-driven model,
• the cyclic model, and the incremental,
• iterative model — is a cyclic, iterative model for software development that involves a risk-driven approach to developing products.

Answer 1

spiral model

Question 2

• combination of Waterfall Model and Iterative Model
• allows refinement throughout each stage of the model. This means that one stage can be skipped for testing and returned to at a later point

Answer 2

spiral model

Question 3

best suited for complex embedded product development where the requirements are changing from the customer’s side.

Answer 3

spiral model

Question 4

HISTORY OF SPIRAL MODEL

Answer 4

• Defined by Barry Boehm in his 1988 article.
• This model was not the first model to discuss iterative development, but it was the first model to explain why the iteration matters.

Question 5

The product manager focuses on defining the spiral’s objectives, identifying the requirements needed to achieve the objective, and, lastly, defining the scope of the spiral

Answer 5

Planning

Question 6

In this phase of the cycle, the product manager identifies all of the potential risks associated with the spiral’s objectives and requirements. Risks can be * technical, financial, market-related, operational, and/or environmental.*

Answer 6

Risk

Analysis

Question 7

engineers take what was documented in the requirements and translate it into a functional product. The product manager in this phase validates and ensures that what was built meets the requirements and objectives of the spira

Answer 7

Engineering & Development

Question 8

evaluate the success of the output of the spiral using the defined metrics in the spiral objectives

Answer 8

Evaluation

Question 9

Four Phases of Spiral Model

Answer 9

1. Planning
2. Risk Analysis
3. Engineering and Development
4. Evaluation

Question 10

Advantages of Spiral Model

Answer 10

1. best suited for large projects
2. supports risk handling
3. flexibility in requirements
4. customer satisfaction

Question 11

Disadvantages of Spiral Model

Answer 11

1. difficulty in time management
2. more complex than other SDLC model
3. not suitable for small projects
4. depend too much on risk analysis

Question 12

WHEN TO USE SPIRAL MODEL?

Answer 12

1. medium to high risk projects
2. users are unsure of their needs
3. risk and cost evaluation are important
4. complex requirements
5. significant changes are expected

Question 12

four fold procedure

Answer 12

1. evaluate first prototype
2. define requirements of second prototype
3. pland and design second protoytpe
4. construct and test second prototype

Question 12

early sample, model or release of a product built to test a concept or process or to act as a thing to be replicated or learned from

Answer 12

prototype

Question 13

• sequential SDLC model where each development phase has a corresponding testing phase.
• This ensures verification and validation throughout the process

Answer 13

V-Model

Question 14

originating in late 1980s Germany, is a software development framework, advancing over the waterfall model by incorporating early testing phases to promptly identify and resolve issues. It gained notable adoption, especially in industries like automotive manufacturing.

Answer 14

V - MODEL

Question 15

the 2 phases of v - model

Answer 15

1. verification phase
2. validation phase

Question 16

verification phase

Answer 16

1. requirement analysis
2. system design
3. architectureal design
4. module design
5. coding

Question 17

Validation Phase

Answer 17

1. unit testing
2. integration testing
3. system testing
4. user acceptance testing

Question 18

initial phase involves understanding product requirements from the customer’s perspective through detailed communication.

Answer 18

Requirement analysis

Question 19

Once clear and detailed product requirements are obtained, the system design phase begins. This involves detailing the hardware and communication setup for the product. The system test plan is then based on this design.

Answer 19

System design

Question 20

Architectural specifications are designed with multiple technical approaches, considering technical and financial feasibility

Answer 20

Architectural design

Question 21

phase breaks down the system into modules, defining data transfer and communication. Integration tests are designed based on this for documentation

Answer 21

High Level Design (HLD

Question 22

In this phase, detailed internal designs for system modules, known as Low Level Design (LLD), are specified

Answer 22

module design

Question 23

system modules are developed using chosen programming languages and guidelines

Answer 23

CODING

Question 24

Unit Test Plans (UTPs) are created during module design to eliminate errors at the code level.

Answer 24

unit testing

Question 25

**conducted during the architectural design phase**. This testing verifies the coexistence and communication of internal modules within the system

Answer 25

Integration testing

Question 26

* is linked to the system design phase. It ensures the entire system's functionality and communication with external systems. * This phase often uncovers software and hardware compatibility issues.

Answer 26

System testing

Question 27

examples of v - model

Answer 27

1. Medical Device Software 2. Automotive Embedded Systems 3. Telecommunication Software

Question 28

ADVAnTAGES of V-Model

Answer 28

1. for smaller projects 2. early verification 3. highly disciplined 4. accurate process tracking

Question 29

DISADVAnTAGES of V-Model

Answer 29

1. high risk changes 2. slows down development process 3. does not support iteration 4. requires a lot of documentation

Question 30

WHEN TO USE V - MODEL?

Answer 30

1. short project 2. focus on early correction and detection of defects 3. small-medium projects 4. ample resources available 5. requirements clearly defined

Question 31

ComparIson of spiral and v models

Answer 31

SPIRAL MODEL * Testing is done in the spiral model at the end of the engineering phase * Cost of spiral model is expensive * Flexibility to change in the spiral model is not that difficult. * The guarantee of success through the Spiral model is low * It is iterative. V - MODEL * In V-model, testing activities start with the first stage. * Cost of V-model is also expensive. * Flexibility of V-model little flexible * Guarantee of success through V-model is high * It is not iteratve.