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Software Engineering Questions and Answers

1.

Which of the following is NOT a valid Software Life Cycle Model?

Exam Year(s)

DSSSB TGT - 2023,

Answer: D

'Circular' is not a valid software life cycle model. JAD (Joint Application Development) is a method of gathering requirements through workshops that the key treats as valid, and the iterative and prototype models are recognised models. The spiral is the model with a cyclic form, and not a model called circular. The spiral model, the waterfall model and the iterative model are examples of models that do appear in textbooks.

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2.

Which of the following statements is/are true for the Waterfall Model? Statements: i) This model does not work smoothly if there are some issues left at the previous step. ii) It projects the process of development in a cyclic manner, repeating every step after every cycle of software development life cycle process. iii) This model considers risk, which often goes unnoticed by most other models. iv) This model provides means of testing of software at each stage in a reverse manner.

Exam Year(s)

DSSSB TGT - 2023,

Answer: A

Only statement i is true for the Waterfall Model. Because the model moves from one phase to the next in order, it works badly when issues are left unsolved at a previous step. Statement ii describes iterative or cyclic models, statement iii (consideration of risk) is a feature of the spiral model, and testing at each stage in a reverse manner (iv) is the V-model. So the options with ii, iii or iv are wrong. In the waterfall model the stages (requirements, design, coding, testing and maintenance) follow one another in a line, with little return to an earlier stage.

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