MODELS

Question 1

What is layered technology?

Answer 1

Software engineering is a fully layered technology, to develop the software we need to go from one layer to the next. All the layers are connected and require the fulfilment to the previous layer.

Question 2

The layered technology consists of?

Answer 2

Quality focus
Process
Methods
Tools

Question 3

what is quality focus?

Answer 3

It provides providing security to the software so that data can be accessed by only an authorized person It also focuses on maintainability and usability.

Question 4

what is process?

Answer 4

It is the foundation or base layer of software engineering. It binds all the layers together for the development of software before the deadline or on time.

Process defines a framework that must be established for the effective delivery of software engineering technology.

Question 5

what are methods?

Answer 5

During the process of software development the answers to all “how-to-do” questions are given by method. It has the information of all the tasks.

Question 6

what are tools?

Answer 6

automated support for the software dev.

they are integrated

Question 7

base layer of software engineering

Answer 7

process

Question 8

what is a software process model?

Answer 8

A software process model is an abstraction of software development process.
It specifies the stages and order of process.

It is a representation of the order of activities of the process and the sequence in which they are performed

Question 9

what is SDLC model

Answer 9

it is the pictorial and diagrammatic representation of the life cycle of the software.

a methodology that defines the entire procedure of software development step-by-step.

SDLC in software engineering models outlines the plan for each stage so that each stage of the software development model can perform its task efficiently to deliver the software at a low cost within a given time frame that meets users’ requirements.

Question 10

what is the need for SDLC?

Answer 10

Without using an exact life cycle model, the development of a software product would not be in a systematic and disciplined manner.

When a team is developing a software product, there must be a clear understanding among team representative about when and what to do. Otherwise, it would point to chaos and project failure.

Question 11

steps of SDLC

Answer 11

STEP 1 planning and requirements analysis
STEP 2 defining req
STEP 3 designing the software
STEP 4 development
STEP 5 testing
STEP 6 deployment
STEP 7 maintenance

Question 12

what is the most imp step in SDLC

Answer 12

planning and req analysis

Question 13

what is SRS?

Answer 13

software req spec.

Here all the gathered req are documented and this document acts as a contract between the developer and the customer.

Question 14

what is waterfall model

Answer 14

The steps always follow in order and do not overlap. The developer must complete every phase before the next phase begins. This model is named “Waterfall Model”, because its diagrammatic representation resembles a cascade of waterfalls.

Question 15

what are steps of waterfall model

Answer 15

feasibility study
req analysis and gathering
design
coding and unit testing
integration and system testing
maintenance

Question 16

what is classic waterfall model

Answer 16

The waterfall Model illustrates the software development process in a linear sequential flow. This means that any phase in the development process begins only if the previous phase is complete. In this waterfall model, the phases do not overlap.

Question 17

what is iterative waterfall model

Answer 17

The iterative waterfall model provides feedback paths from every phase to its preceding phases, which is the main difference from the classical waterfall model.

When errors are detected at some later phase, these feedback paths allow correcting errors committed by programmers during some phase.

But, there is no feedback path to the stage – feasibility study

Question 18

when is SRS formed?

Answer 18

in req analysis and gathering phase

Question 19

when is SDD formed?

Answer 19

in design phase

Question 20

what is SRS

Answer 20

it is formed during req analysis and gathering phase and is created to contain detailed description of what the system will do in common language

Question 21

what is SDD

Answer 21

formed during design phase and all the work done here documented in SDD

Question 22

when to use waterfall model

Answer 22

project is short
req are constant
situation is calm

Question 23

advantages of waterfall model

Answer 23

req are constant
release date and costs can be determined before dev

Question 24

disadvantages of waterfall model

Answer 24

high risk factor
cannot accept changes during dev

Question 25

what is incremental model?

Answer 25

req are divided into various builds multiple dev cycles take place here making the life cycle a multi-waterfall cycle. cycles are div into smaller and easily managed modules In this model, each module passes through the requirements, design, implementation and testing phases. A working version of software is produced during the first module,. Each subsequent release of the module adds function to the previous release. The process continues till the complete system is achieved.

Question 26

what are the phases of incremental model?

Answer 26

req analysis design and implementation testing implementation

Question 27

when to use incremental model

Answer 27

when req are superior When Software team are not very well skilled or trained. When the customer demands a quick release of the product.

Question 28

disadv of incremental model

Answer 28

Needs good planning and design. Total cost is higher than waterfall.

Question 28

adv of incremental model

Answer 28

Generates working software quickly and early during the software life cycle. Easier to manage risk because risky pieces are identified and handled during it’d iteration.

Question 29

what is iterative model

Answer 29

In this Model, you can start with some of the software specifications and develop the first version of the software. After the first version if there is a need to change the software, then a new version of the software is created with a new iteration. Every release of the Iterative Model finishes in an exact and fixed period that is called iteration.

Question 30

what is agile model?

Answer 30

combination of iterative and incremental process models Agile Methods break the product into small incremental builds. These builds are provided in iterations. Each iteration typically lasts from about one to three weeks.

Question 31

what are evolutionary process models?

Answer 31

Evolutionary model is a combination of Iterative and Incremental model

Question 32

what are types of evolutionary process models

Answer 32

prototyping spiral

Question 33

what is prototype model?

Answer 33

The prototype model requires that before carrying out the development of actual software, a working prototype of the system should be built.

Question 34

what is spiral model

Answer 34

it is a risk driven process model combination of seq and waterfall model In spiral model, an alternate solution is provided if the risk is found in the risk analysis, then alternate solutions are suggested and implemented. In its diagrammatic representation, it looks like a spiral with many loops. The exact number of loops of the spiral is unknown and can vary from project to project.

Question 35

what are dimensions of spiral model?

Answer 35

radial and angular radial - cumulative costs angular - progress made in completing in each cycle

Question 36

each iteration in agile lasts?

Answer 36

1-3 weeks

Question 37

which model is combination of iterative and incremental

Answer 37

agile

Question 38

what is a iteration

Answer 38

each release of the iterative model finishes in an exact and fixed period called ietration

Question 39

which model is comb of waterfall and seq

Answer 39

spiral