System Analysis And Design MCQ Questions & Answers | Computer Science

structure chart: This is the correct answer. In structured design, the primary tool used is a structure chart. A structure chart is a visual representation of the modules or components of a system and their relationships, showing the hierarchy and connections between them.

data-flow diagram: While data-flow diagrams are important in structured design, the primary tool is the structure chart.

program flowchart: Program flowcharts are used to represent the flow of control in a program but are not the primary tool in structured design.

module: A module is a component of a system, and while important in structured design, the primary tool is the structure chart.

Therefore, in the context of the question, the primary tool used in structured design is a structure chart (Option A).

Prototyping is a software development approach where a prototype or an initial version of the system is built, tested, and then refined as necessary until an acceptable prototype is achieved.

4GLs (Fourth Generation Languages) are often used in prototyping because they allow for faster development compared to third-generation languages like BASIC or COBOL.

4GLs provide higher-level programming constructs and tools that facilitate rapid development and iteration of prototypes.

Using 4GLs, developers can quickly create and modify prototypes, enabling more effective communication with users and stakeholders to gather feedback and refine requirements.

Therefore, in the context of prototyping, 4GLs are used.