Understanding the Software Development Life Cycle

What does SDLC stand for?

• Software Design and Logic Cycle

• System Development Life Cycle

• Software Development Life Cycle

• System Design and Launch Cycle

Which of the following is the correct order of phases in the traditional SDLC?

• Planning, Design, Requirements, Implementation, Testing, Maintenance

• Planning, Requirements, Design, Implementation, Testing, Maintenance

• Requirements, Planning, Testing, Design, Implementation, Maintenance

• Design, Planning, Requirements, Testing, Implementation, Maintenance

In the Waterfall Model, which characteristic best describes the relationship between its phases?

• Phases can be revisited at any time during the project

• Phases overlap and run concurrently to save time

• Each phase must be fully completed before the next phase begins

• Phases are repeated in cycles until the product is complete

During the Requirements Gathering phase, which technique involves observing end-users in their natural work environment to understand how they perform tasks?

• Prototyping

• Ethnographic observation

• Benchmarking

• Regression analysis

A software team is performing testing to verify that previously working features have not been broken after a new code change is introduced. Which type of testing strategy are they applying?

• Unit Testing

• Acceptance Testing

• Regression Testing

• Integration Testing

Which of the following best describes the difference between corrective maintenance and adaptive maintenance in the Maintenance and Support phase?

• Corrective maintenance adds new features, while adaptive maintenance fixes bugs

• Corrective maintenance fixes defects found after deployment, while adaptive maintenance modifies the system to work in a changed environment

• Corrective maintenance updates documentation, while adaptive maintenance improves performance

• Corrective maintenance handles user training, while adaptive maintenance handles security patches

A development team is using the Waterfall Model for a large government project. Midway through the implementation phase, the client requests significant changes to the original requirements. Analyze the challenges this situation presents within the Waterfall Model and identify the most appropriate course of action.

• Immediately incorporate the changes into the current phase without documentation, as client satisfaction is the top priority

• Ignore the changes since the Waterfall Model does not allow any modifications once implementation has started

• Formally document the change request, assess its impact on cost, timeline, and completed phases, and decide whether to restart affected phases or negotiate scope with the client

• Pause the project indefinitely until the client finalizes all requirements before proceeding

A software company is developing a safety-critical medical device application. During the testing phase, the team must decide between black-box testing and white-box testing strategies. Considering the nature of the application, reason through which combination of testing strategies would be most appropriate and justify why.

• Only black-box testing should be used because it simulates real user interactions and is sufficient for all safety-critical systems

• Only white-box testing should be used because internal code structure is the only factor that matters in medical applications

• Both black-box and white-box testing should be used, as white-box testing ensures internal logic and code paths are verified while black-box testing validates that the system meets functional requirements from the user's perspective

• Neither testing strategy is needed since the system will undergo regulatory approval, which replaces the need for internal testing

A project manager is evaluating whether to use the Waterfall Model or an iterative SDLC approach for a new e-commerce platform where requirements are expected to evolve frequently based on user feedback. Using your understanding of SDLC phases and the Waterfall Model's limitations, which decision is most strategically sound and why?

• Choose the Waterfall Model because its rigid structure ensures all requirements are captured upfront, preventing any future changes

• Choose the Waterfall Model because it is always faster and cheaper than iterative approaches regardless of project type

• Choose an iterative SDLC approach because it accommodates evolving requirements through repeated cycles of planning, development, and feedback, making it better suited for dynamic projects

• Choose the Waterfall Model because e-commerce platforms are always simple enough to have all requirements defined at the start

A software system that has been in production for three years is experiencing performance degradation as the user base has grown from 1,000 to 500,000 users. The maintenance team must plan a strategy to address this issue. Considering the types of maintenance and the SDLC phases involved in resolving such an issue, which approach represents the most comprehensive and strategic plan?

• Perform perfective maintenance by optimizing the existing codebase and database queries, re-evaluate the system architecture through a mini requirements and design phase, and conduct performance testing before redeployment

• Simply restart the servers periodically to manage the load, as this is the most cost-effective maintenance strategy

• Replace the entire system immediately with a new one without analyzing the root cause of the performance issue

• Only update the user interface to reduce the perceived load time without addressing the underlying performance bottleneck