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Computer Science System Analysis and Design


Question 1:What is System Analysis and Design?

System Analysis and Design is a process used to understand, analyze, design, and implement a system that meets specific business needs. It involves studying existing systems, identifying problems, and designing solutions to improve efficiency and effectiveness.

Question 2:What are the phases of the System Development Life Cycle (SDLC)?

The SDLC typically includes the following phases:

  • Planning: Define the project scope, goals, and constraints.
  • Analysis: Gather and analyze requirements.
  • Design: Create system architecture and detailed design.
  • Implementation: Develop and integrate the system components.
  • Testing: Validate the system to ensure it meets requirements.
  • Deployment: Install and configure the system for use.
  • Maintenance: Provide ongoing support and updates.

Question 3:What is the role of a systems analyst?

A systems analyst is responsible for analyzing business problems and designing information systems solutions. They gather requirements, create specifications, and work closely with developers, testers, and end-users to ensure the system meets business needs.

Question 4:What techniques do you use for gathering requirements?

Common techniques for gathering requirements include:

  • Interviews: Conducting face-to-face or virtual interviews with stakeholders.
  • Surveys/Questionnaires: Distributing surveys to collect information from a large group.
  • Workshops: Facilitating group discussions and brainstorming sessions.
  • Observation: Observing end-users in their work environment.
  • Document Analysis: Reviewing existing documentation and records.
  • Prototyping: Building early versions of the system to gather feedback.

Question 5:What is a use case, and why is it important?

A use case is a detailed description of how users interact with a system to achieve a specific goal. It is important because it helps in understanding user requirements, provides a clear vision of the system's functionality, and serves as a basis for system design and testing.

Question 6:Explain the difference between functional and non-functional requirements

  • Functional Requirements: Describe what the system should do, including specific behaviors, functions, and operations. For example, "The system should allow users to create accounts."
  • Non-Functional Requirements: Describe how the system performs a function, including performance, usability, reliability, and security. For example, "The system should support 1000 concurrent users."

Question 7:What is the importance of system modeling?

System modeling is important because it provides a visual representation of the system, helps in understanding and analyzing system components and their interactions, facilitates communication among stakeholders, and aids in identifying potential issues early in the design process.

Question 8:Explain the difference between a data flow diagram (DFD) and an entity-relationship diagram (ERD).

  • Data Flow Diagram (DFD): Represents the flow of data within a system, showing how data is processed and transferred between different processes and data stores.
  • Entity-Relationship Diagram (ERD): Represents the data model of a system, showing entities, their attributes, and the relationships between entities.

Question 9:What is object-oriented design (OOD)?

Object-Oriented Design (OOD) is a method of designing a system using objects, which are instances of classes that encapsulate data and behavior. OOD focuses on defining software components based on real-world objects and their interactions, promoting reusability, scalability, and maintainability

Question 10:What is a prototype, and why is it used?

A prototype is an early, simplified version of a system used to visualize and validate design concepts with stakeholders. It helps in gathering feedback, refining requirements, and identifying potential issues before full-scale development.




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