CISCO CERTIFIED DEVNET ASSOCIATE (DEVASC 200-901) CERTIFICATION EXAM
COMPLETE PRACTICE TEST BANK QUESTIONS AND ANSWERS | VERIFIED
SOLUTIONS | UPDATED 2026/2027 STUDY GUIDE
Examiner/Administrator: Cisco Systems
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CISCO CERTIFIED DEVNET ASSOCIATE (DEVASC 200-901)
2026/2027 EDITION
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
COMPLETE PRACTICE EXAM
120 MULTIPLE-CHOICE QUESTIONS
PASSING SCORE: 70%
TESTING TIME: 120 MINUTES
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
TABLE OF CONTENTS
1. Software Development and Design
2. Understanding and Using APIs
3. Cisco Platforms and Development
4. Application Deployment and Security
5. Infrastructure and Automation
6. Network Fundamentals
7. Data Formats and Modeling
8. CI/CD and DevOps Practices
9. Troubleshooting and Diagnostics
10. Collaboration and Version Control
Cisco Systems || ALIGNED WITH CURRENT DEVASC 200-901 BLUEPRINTS || NETWORK
AUTOMATION AND SOFTWARE DEVELOPMENT PRINCIPLES || PROFESSIONAL STUDY
GUIDE || 100% VERIFIED | GRADED A+ || COMPREHENSIVE CERTIFICATION
,PREPARATION || PREPARED FOR PROFESSIONAL NETWORK AUTOMATION CAREERS ||
PROFESSIONAL EXAMINATION USE
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Software Development and Design (Questions 1–8)
Q1. A development team is creating a network monitoring application using a
modular architecture. The architect wants to ensure that changes to the data storage
layer do not require changes to the presentation layer. Which design principle best
satisfies this requirement?
A. Tight coupling
B. Separation of concerns
C. Hard-coded dependencies
D. Monolithic integration
Correct Answer: 🔴 B. Separation of concerns
Explanation: 🔹 Separation of concerns divides application functionality into
distinct layers, allowing modifications in one layer without affecting others. Tight
coupling increases dependencies, hard-coded dependencies reduce flexibility, and
monolithic integration combines components too closely. This principle improves
maintainability, scalability, and testing efficiency.
Q2. A Python function receives a list of device IP addresses and returns only those
reachable through ICMP. What characteristic makes the function reusable?
A. It contains device-specific values
B. It performs a single defined task
C. It relies on global variables
D. It directly modifies external files
Correct Answer: 🔴 B. It performs a single defined task
Explanation: 🔹 Reusable functions are designed to perform one specific
responsibility. Device-specific values limit reuse, global variables create
,dependencies, and modifying external files introduces side effects. Single-purpose
functions are easier to test, maintain, and integrate into larger applications.
Q3. During code review, a developer notices duplicated logic appearing in multiple
modules. Which software engineering practice should be applied?
A. DRY principle
B. Waterfall methodology
C. Static routing
D. Manual testing
Correct Answer: 🔴 A. DRY principle
Explanation: 🔹 DRY (Don't Repeat Yourself) reduces duplicated code by
centralizing logic into reusable components. This lowers maintenance effort and
decreases the chance of inconsistent behavior. The other options do not directly
address code duplication.
Q4. Which data structure is most appropriate for storing key-value pairs representing
device hostnames and management IP addresses?
A. List
B. Tuple
C. Dictionary
D. Set
Correct Answer: 🔴 C. Dictionary
Explanation: 🔹 Dictionaries provide efficient key-value storage and retrieval. Lists
are ordered collections, tuples are immutable sequences, and sets store unique
values without key associations. Network automation scripts frequently use
dictionaries to map devices to configuration attributes.
, Q5. An application must process incoming telemetry data streams continuously.
Which programming approach is most suitable?
A. Event-driven programming
B. Batch processing only
C. Static configuration management
D. Manual execution
Correct Answer: 🔴 A. Event-driven programming
Explanation: 🔹 Event-driven programming reacts to incoming events as they occur,
making it ideal for telemetry streams. Batch processing introduces delays, while
static configuration and manual execution are unsuitable for real-time data
processing requirements.
Q6. A development team wants to ensure code changes do not break existing
functionality. Which testing method should be implemented?
A. Regression testing
B. Exploratory routing
C. Network segmentation
D. Hardware validation
Correct Answer: 🔴 A. Regression testing
Explanation: 🔹 Regression testing verifies that existing functionality remains intact
after changes. Network segmentation and hardware validation address different
concerns, while exploratory routing is unrelated to software quality assurance.
Q7. Which HTTP method is considered idempotent and commonly used to retrieve
information from an API?
A. POST
B. PATCH
COMPLETE PRACTICE TEST BANK QUESTIONS AND ANSWERS | VERIFIED
SOLUTIONS | UPDATED 2026/2027 STUDY GUIDE
Examiner/Administrator: Cisco Systems
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
CISCO CERTIFIED DEVNET ASSOCIATE (DEVASC 200-901)
2026/2027 EDITION
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
COMPLETE PRACTICE EXAM
120 MULTIPLE-CHOICE QUESTIONS
PASSING SCORE: 70%
TESTING TIME: 120 MINUTES
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
TABLE OF CONTENTS
1. Software Development and Design
2. Understanding and Using APIs
3. Cisco Platforms and Development
4. Application Deployment and Security
5. Infrastructure and Automation
6. Network Fundamentals
7. Data Formats and Modeling
8. CI/CD and DevOps Practices
9. Troubleshooting and Diagnostics
10. Collaboration and Version Control
Cisco Systems || ALIGNED WITH CURRENT DEVASC 200-901 BLUEPRINTS || NETWORK
AUTOMATION AND SOFTWARE DEVELOPMENT PRINCIPLES || PROFESSIONAL STUDY
GUIDE || 100% VERIFIED | GRADED A+ || COMPREHENSIVE CERTIFICATION
,PREPARATION || PREPARED FOR PROFESSIONAL NETWORK AUTOMATION CAREERS ||
PROFESSIONAL EXAMINATION USE
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Software Development and Design (Questions 1–8)
Q1. A development team is creating a network monitoring application using a
modular architecture. The architect wants to ensure that changes to the data storage
layer do not require changes to the presentation layer. Which design principle best
satisfies this requirement?
A. Tight coupling
B. Separation of concerns
C. Hard-coded dependencies
D. Monolithic integration
Correct Answer: 🔴 B. Separation of concerns
Explanation: 🔹 Separation of concerns divides application functionality into
distinct layers, allowing modifications in one layer without affecting others. Tight
coupling increases dependencies, hard-coded dependencies reduce flexibility, and
monolithic integration combines components too closely. This principle improves
maintainability, scalability, and testing efficiency.
Q2. A Python function receives a list of device IP addresses and returns only those
reachable through ICMP. What characteristic makes the function reusable?
A. It contains device-specific values
B. It performs a single defined task
C. It relies on global variables
D. It directly modifies external files
Correct Answer: 🔴 B. It performs a single defined task
Explanation: 🔹 Reusable functions are designed to perform one specific
responsibility. Device-specific values limit reuse, global variables create
,dependencies, and modifying external files introduces side effects. Single-purpose
functions are easier to test, maintain, and integrate into larger applications.
Q3. During code review, a developer notices duplicated logic appearing in multiple
modules. Which software engineering practice should be applied?
A. DRY principle
B. Waterfall methodology
C. Static routing
D. Manual testing
Correct Answer: 🔴 A. DRY principle
Explanation: 🔹 DRY (Don't Repeat Yourself) reduces duplicated code by
centralizing logic into reusable components. This lowers maintenance effort and
decreases the chance of inconsistent behavior. The other options do not directly
address code duplication.
Q4. Which data structure is most appropriate for storing key-value pairs representing
device hostnames and management IP addresses?
A. List
B. Tuple
C. Dictionary
D. Set
Correct Answer: 🔴 C. Dictionary
Explanation: 🔹 Dictionaries provide efficient key-value storage and retrieval. Lists
are ordered collections, tuples are immutable sequences, and sets store unique
values without key associations. Network automation scripts frequently use
dictionaries to map devices to configuration attributes.
, Q5. An application must process incoming telemetry data streams continuously.
Which programming approach is most suitable?
A. Event-driven programming
B. Batch processing only
C. Static configuration management
D. Manual execution
Correct Answer: 🔴 A. Event-driven programming
Explanation: 🔹 Event-driven programming reacts to incoming events as they occur,
making it ideal for telemetry streams. Batch processing introduces delays, while
static configuration and manual execution are unsuitable for real-time data
processing requirements.
Q6. A development team wants to ensure code changes do not break existing
functionality. Which testing method should be implemented?
A. Regression testing
B. Exploratory routing
C. Network segmentation
D. Hardware validation
Correct Answer: 🔴 A. Regression testing
Explanation: 🔹 Regression testing verifies that existing functionality remains intact
after changes. Network segmentation and hardware validation address different
concerns, while exploratory routing is unrelated to software quality assurance.
Q7. Which HTTP method is considered idempotent and commonly used to retrieve
information from an API?
A. POST
B. PATCH
