CST ACTUAL EXAM – QUESTIONS AND ANSWERS | VERIFIED AND WELL
DETAILED ANSWERS | PLUS RATIONALES | DOWNLOAD AND PASS | LATEST
EXAM UPDATE 2026/2027
Core Domains
1. Foundations of Information Technology and Systems
2. Network Infrastructure and Security
3. Data Management and Analytics
4. Software Development and Lifecycle
5. IT Project Management and Governance
6. Cybersecurity Principles and Ethics
7. Cloud Computing and Virtualization
8. IT Compliance, Risk, and Regulatory Frameworks
Introduction
This comprehensive examination is designed to rigorously assess the knowledge,
skills, and abilities expected of a Certified Systems Technology (CST) professional.
The exam covers a wide spectrum of core domains, from foundational IT principles
and network security to advanced topics in cloud computing, data analytics, and
ethical project governance. Candidates will face a variety of multiple-choice and
scenario-based questions that not only test theoretical understanding but, more
importantly, evaluate the practical application and critical decision-making skills
required to excel in a dynamic and complex technological environment. Success on
this exam demonstrates a candidate's readiness to apply best practices, navigate
regulatory requirements, and solve real-world IT challenges with professional
integrity and efficiency.
,SECTION ONE: QUESTIONS 1 – 50
1. Which OSI model layer is responsible for establishing, managing, and
terminating sessions between two communicating hosts?
A. Transport Layer
B. Network Layer
C. Session Layer
D. Presentation Layer
🟢 Correct Answer: C. Session Layer
🔴 Explanation: The Session Layer (Layer 5) is responsible for dialog control and
synchronization, establishing and managing sessions between applications.
2. What is the primary purpose of a Demilitarized Zone (DMZ) in network
architecture?
A. To serve as the primary internal network for all employees
B. To provide a buffer zone between an internal network and an external,
untrusted network
C. To manage IP address allocation within a private network
D. To encrypt all data transmitted between two hosts
🟢 Correct Answer: B. To provide a buffer zone between an internal network and
an external, untrusted network
🔴 Explanation: A DMZ acts as a perimeter network that exposes external-facing
services to the internet while isolating the internal LAN. It adds an extra layer of
security.
3. In a relational database, which constraint ensures that a column's value is
unique across all rows?
,A. NOT NULL
B. PRIMARY KEY
C. FOREIGN KEY
D. UNIQUE
🟢 Correct Answer: D. UNIQUE
🔴 Explanation: The UNIQUE constraint guarantees that all values in a column are
different. While a PRIMARY KEY is also unique, it's specifically for identifying rows.
The question asks for a constraint that ensures uniqueness generally.
4. Which type of cyberattack involves overwhelming a target system with a
flood of traffic, rendering it unavailable to legitimate users?
A. Man-in-the-Middle Attack
B. Phishing Attack
C. Denial-of-Service (DoS) Attack
D. SQL Injection Attack
🟢 Correct Answer: C. Denial-of-Service (DoS) Attack
🔴 Explanation: A DoS attack aims to disrupt normal service by overwhelming the
target with excessive requests, often consuming bandwidth or system resources.
5. During the software development lifecycle (SDLC), in which phase are the
user requirements defined and documented?
A. Design Phase
B. Implementation Phase
C. Testing Phase
D. Requirements Gathering and Analysis Phase
🟢 Correct Answer: D. Requirements Gathering and Analysis Phase
, 🔴 Explanation: This is the foundational phase of the SDLC where stakeholders
define what the software is supposed to do, and these needs are analyzed and
documented.
6. Which protocol is primarily used for assigning IP addresses dynamically to
devices on a network?
A. DNS
B. TCP
C. DHCP
D. SMTP
🟢 Correct Answer: C. DHCP
🔴 Explanation: The Dynamic Host Configuration Protocol (DHCP) automates the
assignment of IP addresses, subnet masks, and default gateways to hosts,
simplifying network administration.
7. What is the primary purpose of using version control systems like Git in
software development?
A. To deploy applications to a production server
B. To track and manage changes to source code over time
C. To compile the code into an executable file
D. To test the application for security vulnerabilities
🟢 Correct Answer: B. To track and manage changes to source code over time
🔴 Explanation: Version control systems allow multiple developers to collaborate,
track historical changes, revert to previous states, and manage different branches
of a project.
8. Which of the following is an example of asymmetric encryption?
DETAILED ANSWERS | PLUS RATIONALES | DOWNLOAD AND PASS | LATEST
EXAM UPDATE 2026/2027
Core Domains
1. Foundations of Information Technology and Systems
2. Network Infrastructure and Security
3. Data Management and Analytics
4. Software Development and Lifecycle
5. IT Project Management and Governance
6. Cybersecurity Principles and Ethics
7. Cloud Computing and Virtualization
8. IT Compliance, Risk, and Regulatory Frameworks
Introduction
This comprehensive examination is designed to rigorously assess the knowledge,
skills, and abilities expected of a Certified Systems Technology (CST) professional.
The exam covers a wide spectrum of core domains, from foundational IT principles
and network security to advanced topics in cloud computing, data analytics, and
ethical project governance. Candidates will face a variety of multiple-choice and
scenario-based questions that not only test theoretical understanding but, more
importantly, evaluate the practical application and critical decision-making skills
required to excel in a dynamic and complex technological environment. Success on
this exam demonstrates a candidate's readiness to apply best practices, navigate
regulatory requirements, and solve real-world IT challenges with professional
integrity and efficiency.
,SECTION ONE: QUESTIONS 1 – 50
1. Which OSI model layer is responsible for establishing, managing, and
terminating sessions between two communicating hosts?
A. Transport Layer
B. Network Layer
C. Session Layer
D. Presentation Layer
🟢 Correct Answer: C. Session Layer
🔴 Explanation: The Session Layer (Layer 5) is responsible for dialog control and
synchronization, establishing and managing sessions between applications.
2. What is the primary purpose of a Demilitarized Zone (DMZ) in network
architecture?
A. To serve as the primary internal network for all employees
B. To provide a buffer zone between an internal network and an external,
untrusted network
C. To manage IP address allocation within a private network
D. To encrypt all data transmitted between two hosts
🟢 Correct Answer: B. To provide a buffer zone between an internal network and
an external, untrusted network
🔴 Explanation: A DMZ acts as a perimeter network that exposes external-facing
services to the internet while isolating the internal LAN. It adds an extra layer of
security.
3. In a relational database, which constraint ensures that a column's value is
unique across all rows?
,A. NOT NULL
B. PRIMARY KEY
C. FOREIGN KEY
D. UNIQUE
🟢 Correct Answer: D. UNIQUE
🔴 Explanation: The UNIQUE constraint guarantees that all values in a column are
different. While a PRIMARY KEY is also unique, it's specifically for identifying rows.
The question asks for a constraint that ensures uniqueness generally.
4. Which type of cyberattack involves overwhelming a target system with a
flood of traffic, rendering it unavailable to legitimate users?
A. Man-in-the-Middle Attack
B. Phishing Attack
C. Denial-of-Service (DoS) Attack
D. SQL Injection Attack
🟢 Correct Answer: C. Denial-of-Service (DoS) Attack
🔴 Explanation: A DoS attack aims to disrupt normal service by overwhelming the
target with excessive requests, often consuming bandwidth or system resources.
5. During the software development lifecycle (SDLC), in which phase are the
user requirements defined and documented?
A. Design Phase
B. Implementation Phase
C. Testing Phase
D. Requirements Gathering and Analysis Phase
🟢 Correct Answer: D. Requirements Gathering and Analysis Phase
, 🔴 Explanation: This is the foundational phase of the SDLC where stakeholders
define what the software is supposed to do, and these needs are analyzed and
documented.
6. Which protocol is primarily used for assigning IP addresses dynamically to
devices on a network?
A. DNS
B. TCP
C. DHCP
D. SMTP
🟢 Correct Answer: C. DHCP
🔴 Explanation: The Dynamic Host Configuration Protocol (DHCP) automates the
assignment of IP addresses, subnet masks, and default gateways to hosts,
simplifying network administration.
7. What is the primary purpose of using version control systems like Git in
software development?
A. To deploy applications to a production server
B. To track and manage changes to source code over time
C. To compile the code into an executable file
D. To test the application for security vulnerabilities
🟢 Correct Answer: B. To track and manage changes to source code over time
🔴 Explanation: Version control systems allow multiple developers to collaborate,
track historical changes, revert to previous states, and manage different branches
of a project.
8. Which of the following is an example of asymmetric encryption?
