CCP Systems & Software Engineering 3

Question 1

Which design principle states that software entities should be open for extension but closed for modification?

Accepted Answer

Open/Closed Principle

Answer

The Open/Closed Principle (OCP), part of SOLID, means you should be able to add new functionality without altering existing code.

Question 2

In structured systems analysis, what is a Data Flow Diagram (DFD) used for?

Accepted Answer

Illustrating how data moves through a system

Answer

A DFD graphically represents how data flows through a system, including processes, data stores, external entities, and data flows.

Question 3

What is the key difference between black-box testing and white-box testing?

Accepted Answer

Black-box testing tests external behavior without knowledge of internals; white-box tests internal logic

Answer

Black-box testing treats the system as opaque, testing inputs/outputs; white-box testing uses knowledge of the internal implementation to design tests.

Question 4

Which software process model is best suited for large, complex projects with high risk and where requirements are not fully understood upfront?

Accepted Answer

Spiral model

Answer

The Spiral model combines iterative development with systematic risk management, making it ideal for large, high-risk projects.

Question 5

In UML, which diagram type is used to show the sequence of messages exchanged between objects over time?

Accepted Answer

Sequence diagram

Answer

A UML sequence diagram shows object interactions arranged in time sequence, illustrating how operations are carried out.

(CCP) Certified Computing Professional Practice Test

(CCP) Certified Computing Professional Practice Test

CCP Systems & Software Engineering 3