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Exam Review

Key Facts: CPN CPE III Exam

100

Practice Questions

OpenExamPrep

50%

Pass Mark

CPN Syllabus

Level III

Final Stage

CPN

Act 49

Regulatory Mandate

1993 Decree

The CPE Level III is an advanced examination for IT professionals in Nigeria. It tests key topics including software engineering (architecture, design patterns), security & cryptography (symmetric/asymmetric algorithms, network security), computer graphics (rendering, transformations), artificial intelligence (ML, search algorithms), project management (estimating, scheduling, risk), and professional ethics under the CPN Act 49 of 1993.

Sample CPN CPE III Practice Questions

Try these sample questions to review concepts for the CPN CPE III exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1In software design, what is the primary difference between the Factory Method and the Abstract Factory design patterns?
A.Factory Method uses inheritance to let subclasses decide which class to instantiate, while Abstract Factory uses object composition to produce families of related objects.
B.Factory Method produces families of related objects, while Abstract Factory is restricted to creating a single product type.
C.Factory Method relies on runtime configuration using reflection, while Abstract Factory is bound at compile time.
D.Factory Method is a structural design pattern, whereas Abstract Factory is classified as a creational pattern.
Explanation: The Factory Method pattern defines an interface for creating an object but lets subclasses decide which class to instantiate, utilizing class inheritance. In contrast, the Abstract Factory pattern provides an interface for creating families of related or dependent objects without specifying their concrete classes, relying on object composition.
2Which structural design pattern is best suited to dynamic adding of responsibilities to an individual object without affecting other objects of the same class?
A.Adapter
B.Decorator
C.Facade
D.Proxy
Explanation: The Decorator pattern attaches additional responsibilities to an object dynamically. It provides a flexible alternative to subclassing for extending functionality, allowing you to wrap an object to modify its behavior at runtime without changing the original class definition.
3Under the SOLID principles of object-oriented design, which principle states that software entities should be open for extension but closed for modification?
A.Single Responsibility Principle (SRP)
B.Open/Closed Principle (OCP)
C.Liskov Substitution Principle (LSP)
D.Dependency Inversion Principle (DIP)
Explanation: The Open/Closed Principle (OCP) states that software entities (classes, modules, functions) should be open for extension, allowing their behavior to be modified or augmented, but closed for modification, meaning their source code should remain unchanged. This is usually achieved using abstractions, interfaces, or inheritance.
4In a microservices architecture, which pattern is designed to prevent a cascading failure across services by stopping operations that are highly likely to fail?
A.API Gateway
B.Saga Pattern
C.Circuit Breaker
D.Database-per-service
Explanation: The Circuit Breaker pattern prevents an application from repeatedly trying to execute an operation that's likely to fail. It monitors for consecutive failures and, when a threshold is crossed, trips the circuit breaker so that subsequent calls fail immediately or return a fallback, protecting downstream resources.
5What is the primary objective of requirements validation in software engineering?
A.To ensure that the requirements specify the correct system that meets the user's actual needs.
B.To verify that the code implements the requirements specification correctly.
C.To estimate the development schedule and resource requirements.
D.To write concrete test cases for system integration testing.
Explanation: Requirements validation is the process of checking that the requirements defined in the SRS actually reflect what the customer and users want and need from the system. It answers the question, 'Are we building the right product?', whereas verification answers, 'Are we building the product right?'.
6In cyclomatic complexity, if a control flow graph of a program has 10 nodes, 12 edges, and 1 connected component, what is the cyclomatic complexity of the program?
A.2
B.4
C.10
D.12
Explanation: Cyclomatic complexity M is calculated using the formula: M = E - N + 2P, where E is the number of edges, N is the number of nodes, and P is the number of connected components. Substituting the given values: M = 12 - 10 + 2(1) = 4.
7Which of the following describes the 'Liskov Substitution Principle' (LSP) in object-oriented design?
A.Subclasses should be substitutable for their base classes without altering any of the desirable properties of the program.
B.High-level modules should depend on abstractions, not on concrete implementations.
C.Interfaces should be client-specific and minimal rather than monolithic.
D.A class should only have a single, well-defined reason to be modified.
Explanation: The Liskov Substitution Principle (LSP) states that if S is a subtype of T, then objects of type T may be replaced with objects of type S without altering any of the desirable properties of the program (e.g., correctness, task performed). It guarantees that derived classes extend the base class without changing its expected behavior.
8In Domain-Driven Design (DDD), what represents an object that is defined by its identity rather than its attributes, and whose identity continues across its lifecycle?
A.Value Object
B.Entity
C.Aggregate Root
D.Service
Explanation: An Entity in DDD is an object defined by its unique identity rather than its attributes. Even if all of its other properties change, it remains the same object due to its persistent identifier (e.g., User ID, Order ID). This is contrasted with Value Objects, which are defined solely by their attributes.
9What is the role of continuous integration (CI) in a modern DevOps software delivery pipeline?
A.To automatically build and test code changes immediately after they are committed to the shared repository.
B.To automate the provisioning of cloud infrastructure using infrastructure-as-code scripts.
C.To monitor production systems for performance anomalies and error rates in real time.
D.To coordinate sprint planning and task assignments among distributed developers.
Explanation: Continuous Integration (CI) is the practice of automating the integration of code changes from multiple contributors into a single software project. The primary goals are to run automated builds and tests immediately after commits are pushed, ensuring that code changes do not break the main branch.
10Which pattern is used to decouple an abstraction from its implementation so that the two can vary independently?
A.Bridge
B.Adapter
C.Composite
D.Proxy
Explanation: The Bridge pattern is a structural design pattern that decouples an abstraction from its implementation, allowing both to vary independently. It achieves this by replacing inheritance with object composition, routing requests from the abstraction interface to a separate implementor interface.

About the CPN CPE III Exam

The CPN Computer Professional Examination Level III (CPE III) is the terminal professional stage for IT certification in Nigeria, equivalent to a Master's degree level. It is designed to license professional IT practitioners, consultants, and computing experts. The exam evaluates advanced knowledge across six key domains: software engineering, security and cryptography, computer graphics, artificial intelligence, project management, and professional practice under the CPN Act 49 of 1993. Passing this exam and the project defense qualifies candidates to register as Chartered IT Professionals in Nigeria.

Exam sponsor: Computer Professionals (Registration Council of Nigeria) (CPN). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

Multiple-choice and theory/essay questions across specialized tracks, plus a mandatory project defense

Time Limit

3 hours per written paper

Passing Score

50% per module

Exam / Certification Fees

₦82,700 – ₦102,700 depending on track

Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

20%

Software Engineering

Advanced software architecture, design patterns (Creational, Structural, Behavioral), requirements engineering, software quality assurance, testing methods, DevOps, continuous integration/continuous delivery (CI/CD), and agile methodologies.

20%

Security and Cryptography

Symmetric and asymmetric encryption (AES, DES, RSA, ECC), cryptographic hash functions (SHA-2, SHA-3, MD5), network security protocols (TLS, IPsec, SSH), digital signatures, access control models, threat identification, and vulnerability management.

15%

Computer Graphics

The graphics rendering pipeline, 2D and 3D geometric transformations (translation, rotation, scaling, homogeneous coordinates), rasterization algorithms (Bresenham's, scan-line), shading and illumination models (Phong, Gouraud), ray tracing, texture mapping, and color models (RGB, CMYK, HSV).

15%

Artificial Intelligence

Machine learning algorithms (supervised, unsupervised, reinforcement learning), neural networks and deep learning architectures, search algorithms (informed, uninformed, minimax, A*), knowledge representation, expert systems, and natural language processing (NLP).

15%

Project Management

Project life cycle management, estimation techniques (COCOMO, Function Point), risk management, project scheduling (Critical Path Method, PERT), project cost management (Earned Value Management), and software quality planning.

15%

Professional Practice and Ethics

The CPN Act 49 of 1993 (CAP C22 LFN 2004) legal framework, registration and licensing criteria, powers of the Council, the Disciplinary Committee and Investigating Panel, penalties for unlicensed computing practice, CPN Code of Conduct, and national IT policies of Nigeria.

Preparing for the CPN CPE III Exam

What You Need to Know

  • Passing score: 50% per module
  • Assessment: Multiple-choice and theory/essay questions across specialized tracks, plus a mandatory project defense
  • Time limit: 3 hours per written paper
  • Exam / certification fees: ₦82,700 – ₦102,700 depending on track Official sources

Using Our Practice Resources

  • Work through all 100 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

CPN CPE III: Suggested Study Strategy

1Familiarize yourself with CPN Act 49 of 1993, especially the functions of the Council, registration rules, and the disciplinary mechanisms.
2Understand the rendering pipeline steps and geometric transformations using homogeneous coordinates in Computer Graphics.
3Practice calculating critical path, float time, and EVM metrics (CPI, SPI, EAC) for Project Management.
4Master symmetric vs asymmetric cryptography, digital signature flows, and SSL/TLS handshakes.
5Understand standard Software Engineering design patterns like Singleton, Factory, Adapter, and Observer, along with testing methodologies.

Frequently Asked Questions

What is the CPN CPE Level III exam?

It is the final stage of the professional examinations conducted by the Computer Professionals (Registration Council of Nigeria), certifying IT practitioners as chartered professionals.

What are the eligibility requirements for CPE III?

Candidates must have completed CPE II, or possess a recognized degree/HND in Computer Science, Computer Engineering, or IT, along with post-qualification industry experience.

What is the passing score for the CPN CPE III?

The passing score is 50% for each written paper/module, plus passing the project defense.

How much does the CPN CPE III exam cost?

The examination fees range from ₦82,700 to ₦102,700 depending on the specialization track, plus ₦2,000 for registration form and ₦20,000 for project defense.

What legal authority regulates computing practice in Nigeria?

The Computer Professionals (Registration Council of Nigeria) was established by Act No. 49 of 1993 (CAP C22 LFN 2004). It is a federal offense to practice IT or run a computing firm without CPN registration.