GATE CSE 2014 Set 1 | Question: 18

Question

Match the following:

1) Waterfall model	a) Specifications can be developed incrementally
2) Evolutionary model	b) Requirements compromises are inevitable
3) Component-based software engineering	c) Explicit recognition of risk
4) Spiral development	d) Inflexible partitioning of the project into stages

• A. 1-a, 2-b, 3-c, 4-d
• B. 1-d, 2-a, 3-b, 4-c
• C. 1-d, 2-b, 3-a, 4-c
• D. 1-c, 2-a, 3-b, 4-d

Comments

ans: (B)
Exp: The main drawback of the waterfall model is the difficulty of accommodating change after
the process is underway. One phase has to be complete before moving onto the next phase.
Inflexible partitioning of the project into distinct stages in waterfall model makes it difficult
to respond to changing customer requirements.
Evolutionary software models are iterative. They are characterized in manner that enables the
software engineers to develop increasingly more complete version of software.
In Spiral model, Development can be divided in to smaller parts and more risky parts can be
developed earlier which helps better risk management.

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can you covert this comment into an answer?

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Same question – https://gateoverflow.in/1785/gate-cse-2014-set-1-question-18

Answer 1

• Waterfall Model: We can not go back in previous project phase as soon as as we proceed to next phase ,So inflexible
• Evolutionary: It keeps changing with evolution so incremental in nature
• Component based: Reuse-based approach to defining, implementing and composing loosely coupled independent components into systems
• Spiral: Spiral model is the most advanced .It includes four faces one of which is Risk.
  • Phases: Planning, Risk Analysis, Engineering and Evaluation

Answer 2

• A.  Waterfall Model : This model also known as Classical Lifecycle Model. In this model, the procedure
  
  or stages for development of Software is fixed. So, A perfectly matches with Description IV. 
  
  With this conclusion, Option 2 & Option 3 gets eliminated. We are left with Option 1 & Option 4.
  
   
• B. Evolutionary Model : In this type of model of software development, functionalities are deployed
  
  Incrementally. Initially, basic features are added and after that on every update new features are added.
  
  So, B perfectly matches with Description I.
  
   
• C. Component‐based Software Engineering : In this type of approach the  Requirement compromises
  
  are inevitable. So, C perfectly matches with Description II.
  
  With this conclusion, Option 1 also gets eliminated. We are left with Option 4. Which is the correct answer. 
  
  Nevertheless, let’s check statement D also.
  
   
• D. Spiral Development : This is a type of Software development model, which Explicit recognition of
  
  risk. The cost of implementation of this model is high because all the risks are recognized in
  
  initial stages only. So, D perfectly matches with statement III.

 

Correct Order : A – IV, B – I, C – II, D – III.

 

Option D, is correct answer.