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Updated date Jan 14, 2024
Software Development Life Cycle (SDLC) Interview Questions and Answers part 2 for beginners and experienced.

If you are not gone through the SDLC Interview Questions and Answers - Part 1, then please go through part 1 before coming to part 2.

SDLC Interview Questions and Answers - Part -1 - covers the basic SDLC concepts and techniques.

26. Explain the Big-bang model in SDLC briefly.

This model is a high-risk model as it does not have any specific process. As the customers are not sure about their needs and requirements, the project may go into the wrong way and may need to restart.

27. What does it mean by a computer-based information system?

A system in which a computer is performing some procedures.

28. Who are involved in different phases of SDLC?

The people involved in different phases of SDLC depends on the framework of the company. Here are some professionals who involved:

  1. Business analyst
  2. Senior Developers
  3. System Architect in Design Phase
  4. Developers in the Coding phase.
  5. Testers in Testing Phase.
  6. Project Manager and Maintenance Team

 29. Sometimes SDLC project early terminates. In which phase this can happen?

Infeasibility study phase.

30. Represent different maturity levels in CMM.

Here is the different maturity level –

  • Initial
  • Managed
  • Defined
  • Quantitatively Managed
  • Optimizing

31. Mention the deployment phase in Software Development.

In the deployment phase, the newly developed software system is delivered for consumer needs.

32. Explain the RAD model in Software Development.

RAD stands for Rapid Application Development. It delivers a method for developing high-quality software products fast with following these steps:

  • Early prototyping,
  • Re-using of software components.
  • Following a rigid scheduling
  • Having good communication in the team.

33. In which type of feasibility cost, savings, and additional profits will exceed the investment requirement?

In economic feasibility, cost savings and additional profits will exceed the investment requirement.

34. What is the importance of software maintenance?

The maintenance team consists of developers, testers, and project managers involved in modifying or updating and fixing bugs to improve the performance of newly delivered software.

35. What are the stages of the software maintenance phase in SDLC?

Different types of software maintenance present, such as:

  • Adaptive – This type deals with changes in hardware as well as software environments where the software is deployed.
  • Preventive – Taking major steps to prevent future risks.
  • Corrective – Fixing bugs reported by customers.
  • Perfective – Adding new features according to customers’ needs.

36. What are the advantages of using the SDLC model?

  1. SDLC model delivers maximum management control through the life cycle of a software product development.
  2. This approach helps to develop intermediate products and can change the product according to user-defined standards and needs.

37. What are the disadvantages of using the SDLC model?

  1. The making of documentation is time-consuming and expensive.
  2. Sometimes, Users unable to evaluate and review the intermediate products (just like data flow diagram) according to their requirements.

38. What is the importance of requirement gathering in SDLC?

Requirement gathering is the initial stage of SDLC. Because in this stage, the project team starts to understand the needs of customers for the project. During this stage, the project team meets with its customers to outline each requirement in detail.

39. What is the baseline?

The baseline is a virtual line that denotes the completion of each phase. When all activities associated with a particular phase are accomplished, a baseline will start working for the next phase.

40. What are the ways to gather information?

Requirements can be gathered from customers or users through surveys, domain analysis, task analysis, simple interviews, prototyping, studying different versions of software, etc.

41. What are the benefits of using the waterfall model?

Here are some benefits of using the waterfall model –

  • As the model is rigid, it can be easily managed.
  • Each phase of this model consists of particular deliverables and review processes.
  • It is considered as a very effective approach for small projects.

42. Explain the software release process in brief.

In the software release process, the project manager makes a release team consisting of developers, testers, project management executives. This team goes to customers’ places and deploys software products. They also deliver some training to customers regarding the functioning of software if required.

43. What are the basic advantages of the V- model in SDLC?

Here are some advantages of the V-model:

  • Simple and easy to handle.
  • It is effective for small projects where users’ specifications are easily understood.
  • It has a high chance of achieving success over the waterfall model.
  • Each phase has specific deliverables.

44. What is the importance of using the RAD model?

RAD model (Rapid Application Development) can reduce the development time in order to increase the speed of the development process. As all functions are modularized here, it is easy to handle. It encourages customer feedback and helps to solve several integration issues. 

45. Give 2 differences between SRS and BRS.

SRS (Software Requirements Specification) BRS (Business requirements specification)
It is an agreement between the developer and the customer. BRS is a specification that Clients give to a software development organization.
It has two subdocuments-
  1. System Requirements Specification
  2. Functional Requirements Specification
It consists of descriptions of –
  1. Products,
  2. Systems,
  3. Software, and
  4. Processes 

46. What is the advantage of the spiral model?

  1. A high amount of risk can be analyzed.
  2. It is effective for critical projects.
  3. It has strong approval and documentation control.

47. What are the advantages of using the Prototype model?

  1. Errors can be detected earlier.
  2. The quick feedback from the user side available for leading a better solution.

48. What is CMM?

CMM stands for Capability Maturity Model. It is a benchmark to measure the maturity of the process of an organization. It is used to develop and refine the software development process.

49. What are the key aspects of the software maintenance process?

This process includes modification, corrective changes, Enhancements, Adaption of new technologies, and retiring old systems, and develop new ones.

50. What is meant by the Incremental model?

Incremental Model is a process of software development where the requirement is divided into various builds. Each iteration or build passes through the requirements, design, implementation, and testing phases


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