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Top SDLC Interview Question and Answers (2024)


If you want to pursue a career in the SDLC field, you are in the right place! We are here to present the top and best interview questions and answers on the software development life cycle (SDLC). By the end of these questions, you shall be confident to face your SDLC interviewer. 

Q1. How Do the Six Different Stages That Comprise The SDLC Operate?

Ans: The SDLC comprises six phases: The requirements phase, the analysis phase, the design phase, the coding phase, the testing phase, and the delivery and maintenance phase. The phases of software creation are fundamental to it as every step ensures the orderliness and effective production of soft wares. Let's check in a little detail on the respective operations of these stages:

1. Requirements Phase:

  • Purpose: This phase concerns documentation of how the software should perform.
  • Activities: Engaging in dialogue with stakeholders, determining user demands, and developing system specifications.
  • Outcome: An initial requirements document that governs the entire implementation.

2. Analysis Phase:

  • Purpose: Perform engineering analysis of technical requirements and specify them.
  • Activities: Performing feasibility assessments, risk analysis, and precise software requirements.
  • Outcome: They develop a software requirement specification (SRS) document as a blueprint for the design phase.

3. Design Phase:

  • Purpose: To plan the software, architect it, and design the system layout.
  • Activities: Developing data flow diagrams, entity-relationship diagrams, and system models.
  • Outcome: Documents explaining the software architecture, the database design, and the interface designs.

4. Coding Phase

  • Purpose: The third phase is developing and writing the actual code of the software.
  • Activities: Code creation, database design, as well as unit functions.
  • Outcome: The first version of the software is ready for testing.

5. Testing Phase

  • Purpose: To ensure the software functions precisely as it should and contains no bugs.
  • Activities: Undertaking unit, integration, system, and acceptance tests.
  • Outcome: A stable software development product that complies with the demands and can be deployed.

6. Delivery and Maintenance Phase:

  • Purpose: Installation, running, and support of the software.
  • Activities: Software installation, user training, and long-term support.
  • Outcome: The software works, and anything else is rectified during maintenance.

Q2. What Tasks and Roles Make up the Initial Phase of SDLC?

Ans: In the first phase, the main task is communicating with the stakeholders to establish their needs. First, the leading players are the business analyst (BA), who collects requirements based on the provided company template, and the engagement manager (EM), who reviews these requirements and provides additional requirements.

Q3. Why is the Analysis Stage Critical in The SDLC?

Ans: The analysis phase is crucial as it allows for the detailed software requirements specification. It involves a detailed review of the initial phase and gathering requirements to build the software according to the customer’s wishes.

It ensures optimal resource utilization, enables stakeholder input during requirement adjustment, and provides a sound base for later improvement. It also gives a correct cost, quality, and time estimate and avoids scope creep. In addition, it promotes user centrism to increase the project's success.

Q4. What is the Role of the Design Phase in the SDLC?

Ans: This will focus on making software architecture in the design phase. It encompasses the creation of data flow diagrams, E-R diagrams, class diagrams, and object diagrams. This stage leads to TDD, which forms the Technical Design Output and becomes the coder's technical document.

Q5. What are the Primary Tasks and Roles in the Coding Phase of SDLC?

Ans: In this stage, commonly called the Coding phase, programmers do the actual programming or coding. Using the Technical Design Document as a guide, they write the source code following appropriate coding standards, such as good indentation, color coding, and commenting. This is evident in the Source Code Document (SCD).

Q6. What do Test Engineers Do During the Testing Phase of SDLC?

Ans: Test Engineers test the software during the Testing phase to ensure it satisfies the requirements. Considering the requirement document, they develop and implement test cases to ensure the software has no defects. A quality product provides proof for this stage.

Q7. Explain the Delivery Section of the Delivery and Maintenance Phase for SDLC.

Ans: The delivery phase involves transferring the application to the client. Installation engineers deliver and install the application in the customer’s environment and the original program software. The proof document is the final official agreement between the customer and the company.

Q8. What Does Maintenance Involve as Part of the Last Phase of the SDLC?

Ans: Lastly, maintenance involves investigating the challenges the customer experiences when using the application after delivery. The third stage guarantees that the software continues to operate desirably and meets the user's changing needs.

Q9. What Measures Does SDLC Take to Ensure Quality Software Engineering?

Ans: It is a structured software development method that ensures each phase deals with certain aspects of software development, from requirement gathering to maintenance. A systematic approach assists in building high-quality software that conforms to customer needs and ensures reliability

Q10. How Does Compliance With Coding Standards Affect the Coding Stage of the SDLC?

Ans: Standards of coding like indentation, color codings, and commenting ensure the code's consistency, readiness, and maintainability. They are essential in teamwork between the developers and for any modification and enhancement in code for future reference.

Q11. Explain the Significance of the Technical Design Document (TDD) During the Design Phase.

Ans: TDD is a detailed document produced during the Design phase. This outlines the software architecture, including design components such as data flow diagrams and class diagrams. The source code development plan is an essential component of the Coding phase; this document plays a significant role for developers.

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SDLC is an essential module of the manual testing syllabus. If prepared well, it can earn you good points in your interview! That being said, we hope these manual testing SDLC questions and answers justify themselves. If you want the extra edge in preparing, don’t forget to check out our JanBask Manual Testing course.

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