Question at position 38 Data modeling may be the most important part of the systems development process because: it is the easiest.data characteristics are important in the design of programs and other systems components. the data in a system are generally less complex than processes and play a central role in development. data are less stable than processes.

Question

BlackTom AI · Accepted Answer

Data characteristics are important in the design of programs and other systems components.

1) Relevant knowledge points and concepts
- Data modeling: creating conceptual, logical, and physical representations of data (entities, attributes, relationships, keys, constraints).
- System design linkage: data models drive database schema, APIs, data validation, transaction logic, and user interface fields.
- Nonfunctional impacts: data volume, cardinality, and types affect performance, storage, indexing, and scalability.
- Stability and complexity: data definitions and business rules are often central and more stable than transient processes, so a correct data model reduces rework.

2) Step-by-step reasoning
- Start with requirements: capture entities and relationships from business rules (e.g., Customer, Order, Product).
- Convert conceptual model to logical schema: define tables/objects, primary/foreign keys, attribute types and constraints.
- Map schema to programs: program modules read/write those tables; data types, structures, and constraints determine program interfaces, validation code, and error handling.
- Optimize: normalization/denormalization, indices and partitioning decisions come from understanding data characteristics (volume, access patterns), which directly shape implementation and performance tuning.
- Therefore, designing accurate data models is foundational because many other system components are built to accommodate the data model.

3) Calculations/intermediate steps
- Not applicable in numeric form, but the “mapping” process is an explicit sequence: requirements → conceptual model → logical schema → physical schema → program interfaces.

4) Why the correct answer is correct
- Because data characteristics (types, relationships, cardinalities, constraints, volumes) determine how programs and system components must be structured and behave. Good data modeling ensures consistent, efficient, and maintainable system design.

5) Why other options are incorrect
- "it is the easiest.": False — data modeling can be complex and requires careful analysis of business rules.
- "the data in a system are generally less complex than processes and play a central role in development.": Misleading — data can be as complex as processes; the central role is due to dependency, not lower complexity.
- "data are less stable than processes.": Incorrect — data definitions and business entities are often more stable; processes tend to change more frequently.

6) Conclusion
This confirms the correct answer: data characteristics are important in the design of programs and other systems components.

类似问题

Which of the following best describes the importance of creating an accurate data model for your business's database?

Question1.8 A dashboard shows duplicated total sales after creating a many-to-many relationship between tables. The most likely cause is: Incorrect visualization type Double-counting due to relationship ambiguity Missing calculated measures Insufficient data normalization ResetMaximum marks: 2

Which of the following is NOT a reason to use packaged data models?

Relationships in ER diagrams are graphically represented by:

Which of the following is NOT a task when refining a conceptual model into a logical model?

Question at position 4 The process of defining one or more subtypes of a supertype and forming relationships is called: selecting classes.specialization.creating discord.generalization.

Question at position 6 The SDLC phase in which every data attribute is defined, every category of data is listed, and every business relationship between data entities is defined is called the ________ phase. designanalysisplanningimplementation

更多留学生实用工具

智能学习助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单