Quiz: Object-Oriented Analysis and Design — 26 questions

1. What does a software process transform into a software system?

A. Deployment environments

B. Source code modules

C. User requirements

D. Test execution results

Answer: (C)

Explanation

A software process consists of activities that transform user requirements into a software system. Source code, testing, and deployment are activities or outputs within that broader transformation, not its initial input.

2. Which sequence correctly represents the main phases of software development?

A. Programming, analysis, design, requirements identification, maintenance, testing and deployment

B. Requirements identification, analysis, design, programming, testing, deployment and maintenance

C. Design, requirements identification, testing, analysis, programming, deployment and maintenance

D. Analysis, programming, requirements identification, deployment, design, testing and maintenance

Answer: (B)

Explanation

The main phases progress from identifying requirements through analysis, design, programming, testing, and finally deployment and maintenance. The other sequences place major phases in an incorrect order.

3. A team is deciding whether a system should send alerts when inventory is low and how that alerting mechanism will be implemented; which activity addresses each decision?

A. Analysis deploys the system, while design maintains it after release

B. Analysis addresses how the system works, while design identifies what users require

C. Analysis addresses what the system does, while design addresses how it does it

D. Analysis writes executable code, while design verifies the completed system

Answer: (C)

Explanation

Analysis defines the system’s required behavior, such as sending low-inventory alerts, whereas design determines the implementation approach. Coding, deployment, testing, and maintenance are separate development activities.

4. Which comparison correctly distinguishes the Waterfall and Prototype models?

A. Waterfall adapts requirements through repeated cycles, while Prototype postpones requirement clarification

B. Waterfall completes phases sequentially, while Prototype builds an early model to clarify requirements

C. Waterfall analyzes risks iteratively, while Prototype completes each phase before the next begins

D. Waterfall builds experimental models, while Prototype focuses on sequential phase completion

Answer: (B)

Explanation

Waterfall proceeds through completed phases in sequence, while the Prototype model creates an early working model to clarify requirements. Risk-focused iteration characterizes the Spiral model rather than Waterfall.

5. What characteristic most clearly defines the Spiral model?

A. It creates a rapid prototype to clarify user requirements

B. It combines iterative development with explicit risk analysis

C. It completes development phases in a fixed sequence

D. It separates data from processing through functional decomposition

Answer: (B)

Explanation

The Spiral model is defined by combining iteration with risk analysis during development. Fixed sequencing describes Waterfall, rapid requirement clarification describes Prototyping, and functional decomposition describes structured analysis.

6. A system is modeled as Customer, Order, and Product entities, each combining its own data with operations; which approach does this represent?

A. Object-oriented analysis

B. Risk-driven development

C. Structured analysis

D. Sequential process modeling

Answer: (A)

Explanation

Object-oriented analysis decomposes a system into objects that combine data and behavior, as in Customer, Order, and Product entities. Structured analysis instead separates data from processing and decomposes the system by functions.

7. Which combination describes an object in object-oriented analysis?

A. Requirements through use cases, design through classes, and testing through interactions

B. Inputs through data flows, outputs through entities, and behavior through diagrams

C. Functions through procedures, data through separate files, and no distinct identity

D. State through attributes, behavior through methods, and a distinct identity

Answer: (D)

Explanation

An object has state represented by attributes, behavior represented by methods, and an identity that distinguishes it from other objects. Separating data from processing is characteristic of structured analysis rather than the definition of an object.

8. Which set contains the four core properties of object-oriented systems?

A. Modularity, sequencing, prototyping, and risk analysis

B. Abstraction, encapsulation, inheritance, and polymorphism

C. Requirements, analysis, design, and implementation

D. Functions, data flows, entities, and processes

Answer: (B)

Explanation

The four core object-oriented properties are abstraction, encapsulation, inheritance, and polymorphism. The other sets describe development activities, traditional modeling concerns, or structured-analysis elements rather than core object-oriented properties.

9. Which description best characterizes the Rational Unified Process?

A. A visual notation system for representing software architectures

B. A sequential, document-driven, activity-centered development process

C. A testing framework organized around functional requirements

D. An iterative, incremental, use-case-driven, architecture-centric process

Answer: (D)

Explanation

RUP combines iterative and incremental development with a focus on use cases and software architecture. The sequential description corresponds more closely to the Waterfall model, not RUP.

10. Which sequence correctly lists the four phases of RUP?

A. Modeling, Prototyping, Testing, Release

B. Inception, Elaboration, Construction, Transition

C. Analysis, Planning, Implementation, Deployment

D. Requirements, Design, Coding, Maintenance

Answer: (B)

Explanation

RUP progresses through Inception, Elaboration, Construction, and Transition. The other sequences describe generic development activities rather than the official RUP phases.

11. What does a single RUP iteration produce?

A. A collection of design documents awaiting implementation

B. A complete system architecture without tested features

C. A finalized project plan without executable software

D. A runnable increment of the software system

Answer: (D)

Explanation

Each RUP iteration delivers a runnable increment, allowing the system to grow through repeated cycles. Documentation alone does not constitute the runnable product increment produced by an iteration.

12. How should UML be classified in software engineering?

A. A testing procedure for validating implemented requirements

B. A standardized visual modeling language of notation and semantics

C. A project management method for allocating development tasks

D. A software development process organized into iterative phases

Answer: (B)

Explanation

UML is a visual modeling language standardized by OMG, defining notation and semantics. RUP, rather than UML, is the software development process among these concepts.

13. Which set contains the three fundamental building blocks of UML?

A. Classes, objects, and interfaces

B. Processes, phases, and iterations

C. Elements, relationships, and diagrams

D. Requirements, tests, and deployments

Answer: (C)

Explanation

UML is built from elements, relationships, and diagrams, supported by rules and common mechanisms. Classes and objects are examples of modeling elements, not the complete set of three building-block categories.

14. What is the main distinction between structural and behavioral UML diagrams?

A. Structural diagrams show user goals, whereas behavioral diagrams show database schemas

B. Structural diagrams represent implementation code, whereas behavioral diagrams represent project schedules

C. Structural diagrams show static aspects, whereas behavioral diagrams show dynamic aspects

D. Structural diagrams describe testing results, whereas behavioral diagrams describe deployment locations

Answer: (C)

Explanation

Structural diagrams represent relatively static aspects of a system, while behavioral diagrams represent its dynamic behavior. User goals, testing results, and deployment locations are not the defining distinction between these diagram groups.

15. What does a UML class represent?

A. A sequence of actions that produces a result for an actor

B. A template describing objects with shared features and meaning

C. A contract implemented by a related modeling element

D. A concrete object created during one execution of a system

Answer: (B)

Explanation

A class describes a set of objects that share attributes, methods, relationships, and semantics. A concrete runtime entity is an object, whereas a class serves as its template.

16. In UML, what is the difference between a use case and an actor?

A. A use case describes system actions, while an actor represents an interacting role

B. A use case models a static structure, while an actor defines a whole-part relationship

C. A use case defines a class template, while an actor represents an object instance

D. A use case represents an external role, while an actor describes system implementation steps

Answer: (A)

Explanation

A use case is a sequence of system actions that produces a result for an actor, while an actor is a user or external system interacting with the system. Treating the actor as the system behavior reverses their UML roles.

17. What distinguishes aggregation from composition in UML?

A. An aggregated part can survive its whole, whereas a composed part is destroyed with its whole

B. An aggregated part is implemented by a contract, whereas a composed part inherits from its whole

C. An aggregated whole controls execution, whereas a composed whole represents an external actor

D. An aggregated relationship links classes by identity, whereas a composed relationship links them by behavior

Answer: (A)

Explanation

Aggregation is a weak whole-part relationship in which the part remains independent if the whole is destroyed, while composition is a strong relationship in which the part is destroyed with the whole. The other distinctions concern inheritance, contracts, or interaction roles rather than whole-part ownership.

18. Which UML multiplicity means that a relationship must involve at least one instance?

A. $1..*$

B. $0..1$

C. $1$

D. $0..*$

Answer: (A)

Explanation

The multiplicity $1..*$ means at least one instance may participate, with no stated upper limit. By contrast, $0..1$ permits zero or one, $0..*$ permits any number including zero, and $1$ means exactly one.

19. Which set contains only UML primitive types?

A. Integer, Date, String, Currency, and Boolean

B. Set, Bag, Sequence, OrderedSet, and String

C. Integer, Boolean, String, Real, and UnlimitedNatural

D. Enumeration, Class, DataType, Real, and Integer

Answer: (C)

Explanation

UML primitive types include Integer, Boolean, String, Real, and UnlimitedNatural. Date is not a built-in primitive, while collection types and modeling elements belong to different categories.

20. Which statement correctly distinguishes an enumeration from a structured data type in UML?

A. An enumeration represents repeated values, whereas a structured data type represents one basic value.

B. An enumeration defines constraints, whereas a structured data type defines extension mechanisms.

C. An enumeration combines fields, whereas a structured data type lists a fixed set of named values.

D. An enumeration lists named values, whereas a structured data type combines fields or other types.

Answer: (D)

Explanation

An enumeration is a finite set of named values, while a structured data type is compound and combines fields or other data types. Confusing these reverses their defining characteristics.

21. Which three mechanisms are recognized as the principal ways to extend UML?

A. Stereotypes, tagged values, and constraints

B. Profiles, diagrams, and repositories

C. Packages, interfaces, and dependencies

D. Classes, objects, and components

Answer: (A)

Explanation

The principal UML extension mechanisms are stereotypes, tagged values, and constraints. The other groups contain modeling concepts or artifacts rather than the three standard extension mechanisms.

22. How did the number of UML diagram types change between UML 2.0 and UML 2.2?

A. It decreased from 14 to 13 when the Profile diagram was removed.

B. It increased from 13 to 14 when the Profile diagram was added.

C. It remained at 13 because the Profile diagram replaced another type.

D. It increased from 12 to 13 when the Package diagram was added.

Answer: (B)

Explanation

UML 2.0 defined 13 diagram types, and UML 2.2 reached 14 after adding the Profile diagram. The other choices give incorrect changes or attribute the change to the wrong event.

23. Which diagram belongs to the structural UML diagram group?

A. Composite Structure diagram

B. Sequence diagram

C. State Machine diagram

D. Activity diagram

Answer: (A)

Explanation

Composite Structure is one of the seven structural UML diagrams. Sequence, Activity, and State Machine diagrams belong to the behavioral group.

24. Which diagram belongs to the behavioral UML diagram group?

A. Component diagram

B. Package diagram

C. Deployment diagram

D. Interaction Overview diagram

Answer: (D)

Explanation

Interaction Overview is one of the seven behavioral UML diagrams. Deployment, Package, and Component diagrams are structural diagrams.

25. In Kruchten's 4+1 view model, which view guides the logical, process, implementation, and deployment views?

A. The implementation view

B. The deployment view

C. The process view

D. The use-case view

Answer: (D)

Explanation

Kruchten's model uses the use-case view to guide the other four views. The deployment view instead emphasizes software distribution across hardware, so it does not serve as the guiding view.

26. What distinguishes a CASE tool from a simple diagram-drawing tool?

A. A CASE tool focuses on visual drawing, while a simple diagram tool performs code generation and reverse engineering.

B. A CASE tool creates deployment hardware, while a simple diagram tool checks software consistency.

C. A CASE tool combines diagramming with consistency checking, code generation, documentation, and reverse engineering.

D. A CASE tool stores named shapes, while a simple diagram tool manages modeling and engineering activities.

Answer: (C)

Explanation

A CASE tool supports both modeling and engineering tasks, including consistency checking, code and documentation generation, and reverse engineering. A simple drawing tool primarily provides visual diagram creation.