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200 - 901 DEVASC Developing Applications and Automating Workflows using
Cisco Platforms (DEVASC) Practice Exam
Question 1: In Python, which construct is used to store a value that can change during program execution? A) Constant B) Variable C) Function D) Module Answer: B Explanation: A variable is a named location in memory that holds a value and can be updated during execution. Question 2: Which Python data type is used to represent text? A) int B) list C) str D) bool Answer: C Explanation: The str data type in Python is used for string (text) representation. Question 3: What is the primary purpose of using Git in software development? A) To compile code B) To manage version control C) To execute programs D) To test software performance Answer: B Explanation: Git is a distributed version control system used to track changes and manage collaboration in code repositories. Question 4: Which of the following is NOT a control structure in programming? A) for loop B) if statement C) recursion D) while loop Answer: C Explanation: Recursion is a programming technique; control structures include loops and conditionals like if and while. Question 5: In object-oriented programming, what is encapsulation? A) Hiding data and methods within a class B) Creating multiple classes from one C) Deriving new classes from existing ones D) Sharing data among all classes Answer: A
Explanation: Encapsulation refers to bundling data and methods that operate on that data, restricting access to some components. Question 6: Which HTTP method is typically used to retrieve data from a RESTful API? A) POST B) GET C) DELETE D) PUT Answer: B Explanation: The GET method retrieves data from a server without modifying its state. Question 7: What file format is commonly used for API data exchange? A) CSV B) JSON C) TXT D) HTML Answer: B Explanation: JSON (JavaScript Object Notation) is widely used to exchange data between clients and servers. Question 8: Which tool is popular for API testing and documentation? A) Git B) Docker C) Postman D) Kubernetes Answer: C Explanation: Postman is a widely used tool for testing RESTful APIs, sending requests, and documenting endpoints. Question 9: In Python, what is the purpose of a virtual environment? A) To speed up program execution B) To isolate project dependencies C) To compile code faster D) To serve as a runtime debugger Answer: B Explanation: Virtual environments isolate dependencies for different projects, preventing conflicts between packages. Question 10: Which methodology emphasizes iterative development and frequent feedback? A) Waterfall B) Agile C) Spiral D) V-Model Answer: B Explanation: Agile methodology promotes iterative development, flexibility, and frequent stakeholder collaboration.
Question 16: Which of the following is a programming language used for scripting in network automation? A) Java B) C++ C) Python D) Ruby Answer: C Explanation: Python is widely used for scripting and automating network tasks due to its readability and extensive libraries. Question 17: In API security, what mechanism is used to verify the identity of an API client? A) Encryption B) Authentication C) Logging D) Compression Answer: B Explanation: Authentication verifies the identity of the client accessing the API, ensuring only authorized users can interact. Question 18: What is OAuth primarily used for in API interactions? A) Encrypting data B) Authorizing access without sharing credentials C) Compressing API responses D) Monitoring API usage Answer: B Explanation: OAuth is an authorization framework that allows third-party applications to access user data without sharing passwords. Question 19: Which Cisco platform is known for its network management and automation capabilities? A) Cisco ASA B) Cisco DNA Center C) Cisco Unified Communications Manager D) Cisco AnyConnect Answer: B Explanation: Cisco DNA Center provides network management, automation, and analytics for enterprise networks. Question 20: What is the primary function of webhooks in Cisco platforms? A) To store data B) To trigger callbacks for events C) To encrypt network traffic D) To manage user sessions Answer: B Explanation: Webhooks are user-defined HTTP callbacks triggered by specific events, enabling real-time communication.
Question 21: Which Cisco resource provides extensive code samples and learning labs for developers? A) Cisco ASA B) Cisco DevNet C) Cisco Prime D) Cisco Spark Answer: B Explanation: Cisco DevNet offers a wealth of resources, including code samples, sandboxes, and documentation for developers. Question 22: In Python, what error handling structure is used to catch exceptions? A) if/else B) try/except C) for/while D) switch/case Answer: B Explanation: The try/except block in Python is used to catch and handle exceptions during runtime. Question 23: Which method in Git is used to combine changes from different branches? A) clone B) commit C) merge D) pull Answer: C Explanation: The merge command in Git integrates changes from one branch into another. Question 24: In object-oriented programming, what concept allows a class to derive properties from another class? A) Inheritance B) Abstraction C) Encapsulation D) Polymorphism Answer: A Explanation: Inheritance allows one class (child) to inherit attributes and methods from another (parent). Question 25: Which API data format is more human-readable, JSON or XML? A) XML B) CSV C) JSON D) Binary Answer: C Explanation: JSON is generally more human-readable and easier to parse than XML. Question 26: Which version control system is distributed and widely used for managing code? A) SVN B) CVS C) Git
Answer: C Explanation: The keyword “def” is used in Python to define a function. Question 32: What is the primary role of an API key? A) To format data B) To secure and authenticate API requests C) To increase bandwidth D) To compress data Answer: B Explanation: An API key authenticates and identifies the calling project, helping to secure API interactions. Question 33: Which Cisco platform is associated with cloud-managed networking for branch offices? A) Cisco DNA Center B) Cisco Meraki C) Cisco UCS D) Cisco ISE Answer: B Explanation: Cisco Meraki is a cloud-managed networking solution that simplifies the deployment and management of networks. Question 34: What is the purpose of using a container orchestration tool? A) To compile code B) To manage and scale containerized applications C) To write code D) To store database records Answer: B Explanation: Container orchestration tools like Kubernetes automate the deployment, scaling, and management of containers. Question 35: Which of the following best describes Infrastructure as Code (IaC)? A) Using manual scripts for setup B) Managing infrastructure with code-based tools C) Configuring hardware manually D) Testing software performance Answer: B Explanation: IaC is the practice of managing and provisioning computing infrastructure through machine-readable definition files. Question 36: Which of the following is a common Python library for data manipulation and analysis? A) Matplotlib B) Pandas C) Flask D) Django Answer: B Explanation: Pandas is a powerful Python library for data manipulation and analysis.
Question 37: What does the term “polymorphism” in OOP refer to? A) The ability to form new classes from existing ones B) The ability of different classes to be treated as instances of the same class C) The hiding of internal details D) The process of compiling code Answer: B Explanation: Polymorphism allows objects of different classes to be treated as objects of a common superclass, especially when they share the same interface. Question 38: In API communications, which status code indicates a successful GET request? A) 404 B) 500 C) 200 D) 302 Answer: C Explanation: A 200 status code indicates that a GET request was successful. Question 39: Which method is used to update data in a RESTful API? A) GET B) DELETE C) PUT D) OPTIONS Answer: C Explanation: The PUT method is typically used to update existing data in RESTful APIs. Question 40: When using Docker, what is a “container”? A) A virtual machine B) A lightweight, standalone package containing an application and its dependencies C) A physical server D) A network switch Answer: B Explanation: Containers encapsulate an application and all its dependencies, ensuring it runs consistently across environments. Question 41: In network automation, which language is commonly used for scripting along with Python? A) JavaScript B) Bash C) Ruby D) C# Answer: B Explanation: Bash scripting is frequently used for automating tasks in network environments alongside Python. Question 42: What does the “try” block do in Python’s error handling? A) It terminates the program B) It tests a block of code for errors
Answer: C Explanation: Exception handling allows programs to catch and respond to unexpected errors, maintaining smooth execution. Question 48: Which method in Git is used to create a new branch? A) git branch B) git merge C) git commit D) git clone Answer: A Explanation: The git branch command is used to create, list, or delete branches in a Git repository. Question 49: What is the purpose of using version control systems like Git in collaborative projects? A) To execute code faster B) To manage changes and track history C) To secure network connections D) To optimize database queries Answer: B Explanation: Version control systems manage code changes, maintain history, and facilitate collaboration among developers. Question 50: Which Python statement is used to include external modules in your code? A) include B) import C) require D) load Answer: B Explanation: The import statement in Python is used to bring external modules and libraries into a program. Question 51: What is the main advantage of containerization in application deployment? A) Increased hardware dependency B) Consistent environments across different platforms C) Manual configuration of dependencies D) Enhanced compilation speed Answer: B Explanation: Containerization ensures that applications run consistently in different environments by packaging the app with its dependencies. Question 52: In RESTful API design, what is the purpose of the DELETE method? A) To modify data B) To remove resources C) To retrieve information D) To update data Answer: B Explanation: The DELETE method in RESTful APIs is used to remove a specified resource.
Question 53: Which of the following best describes “Agile development”? A) Rigid project phases with fixed scope B) Iterative development with frequent feedback and adaptation C) Extended development cycles D) Strict adherence to documentation before coding Answer: B Explanation: Agile development is characterized by short iterations, continuous feedback, and adaptability to changing requirements. Question 54: What role does encryption play in securing application data? A) It compresses data for faster transmission B) It transforms data into a secure format to prevent unauthorized access C) It deletes sensitive data D) It speeds up processing Answer: B Explanation: Encryption converts data into a secure format that unauthorized parties cannot easily decipher, enhancing data security. Question 55: Which protocol is commonly used for secure remote access in network devices? A) FTP B) Telnet C) SSH D) HTTP Answer: C Explanation: SSH (Secure Shell) provides a secure channel over an unsecured network for remote device access and management. Question 56: In the context of Cisco platforms, what is a Software Development Kit (SDK)? A) A hardware diagnostic tool B) A collection of software development tools and libraries for building applications C) A network security appliance D) A cloud storage solution Answer: B Explanation: An SDK includes tools, libraries, and documentation to help developers build applications for specific platforms. Question 57: Which method is used to handle errors gracefully in Python code? A) try/except blocks B) for loops C) variable declarations D) class definitions Answer: A Explanation: try/except blocks allow Python code to catch and handle errors without terminating the program abruptly. Question 58: What is one benefit of using container orchestration tools in production environments? A) Reduced scalability
D) Cisco Webex Teams Answer: B Explanation: Cisco Modeling Labs (CML) provides virtual network simulation environments for testing and training purposes. Question 64: Which programming principle involves writing code in small, testable modules? A) Monolithic design B) Modular programming C) Procedural programming D) Linear programming Answer: B Explanation: Modular programming divides code into independent, interchangeable modules, which improves maintainability and testability. Question 65: In a CI/CD pipeline, what does “continuous integration” refer to? A) Running tests only at the end of a project B) Merging code changes frequently and automatically testing them C) Manual deployment of code changes D) Integrating hardware components continuously Answer: B Explanation: Continuous integration involves frequently merging code changes into a shared repository and automatically testing them to catch issues early. Question 66: Which of the following is a common vulnerability addressed by secure coding practices? A) Memory leaks B) SQL injection C) Slow performance D) Inadequate comments Answer: B Explanation: SQL injection is a common security vulnerability that secure coding practices aim to prevent by properly validating inputs. Question 67: What is the primary purpose of using encryption for data at rest? A) To improve code readability B) To secure stored data from unauthorized access C) To speed up data processing D) To format data for APIs Answer: B Explanation: Encryption of data at rest protects stored information from unauthorized access or breaches. Question 68: In network fundamentals, which OSI layer is responsible for end-to-end communication? A) Physical B) Data Link C) Network D) Transport Answer: D
Explanation: The Transport layer is responsible for end-to-end communication, ensuring reliable data transfer between hosts. Question 69: What is subnetting used for in IP addressing? A) Compressing data packets B) Dividing a network into smaller, manageable segments C) Encrypting network traffic D) Increasing network speed Answer: B Explanation: Subnetting divides a larger network into smaller sub-networks, which can improve performance and management. Question 70: Which tool is commonly used to troubleshoot network connectivity issues? A) git status B) ping C) curl D) npm Answer: B Explanation: The ping command tests the reachability of a host on an IP network and measures round- trip time. Question 71: In the context of network automation, what does the acronym YANG refer to? A) A programming language B) A data modeling language used to model configuration and state data C) A network protocol D) A container orchestration tool Answer: B Explanation: YANG is a data modeling language used primarily for network configuration and state data, often in conjunction with NETCONF. Question 72: What is the benefit of using model-driven programmability in network automation? A) Increased manual configuration B) Standardized configuration management across devices C) Reduced network security D) Higher latency Answer: B Explanation: Model-driven programmability provides a standardized method for configuring and managing network devices using models like YANG. Question 73: Which network protocol is primarily used for sending emails? A) HTTP B) SMTP C) FTP D) SNMP Answer: B Explanation: SMTP (Simple Mail Transfer Protocol) is used for sending email messages between servers.
Question 79: Which Python keyword is used to handle exceptions? A) catch B) except C) handle D) error Answer: B Explanation: The except keyword is used alongside try to catch and handle exceptions in Python. Question 80: What does continuous deployment in a CI/CD pipeline aim to achieve? A) Manual approval of each release B) Frequent, automated deployment of code changes to production C) Extended testing cycles D) Static code analysis only Answer: B Explanation: Continuous deployment automates the release of code changes to production environments as soon as they pass testing. Question 81: Which of the following is a benefit of using Docker in application deployment? A) Increased dependency on the host OS B) Portability across different computing environments C) Manual environment configuration D) Lack of isolation Answer: B Explanation: Docker containers package an application with its dependencies, ensuring it runs consistently regardless of the underlying host OS. Question 82: In network fundamentals, which protocol is used to translate domain names into IP addresses? A) TCP B) DNS C) HTTP D) FTP Answer: B Explanation: DNS (Domain Name System) translates human-readable domain names into IP addresses needed for routing. Question 83: What is the primary role of authentication in application security? A) Encrypting data B) Verifying the identity of a user or system C) Compressing data D) Logging system activity Answer: B Explanation: Authentication verifies that a user or system is who they claim to be, which is essential for security. Question 84: Which of the following is a best practice in secure coding? A) Hardcoding credentials in source code
B) Validating and sanitizing user inputs C) Disabling encryption D) Ignoring error messages Answer: B Explanation: Validating and sanitizing user inputs prevents many common security vulnerabilities such as SQL injection. Question 85: Which Cisco tool provides real-time analytics and troubleshooting for networks? A) Cisco ASA B) Cisco DNA Center Assurance C) Cisco Spark D) Cisco Meraki Go Answer: B Explanation: Cisco DNA Center Assurance provides real-time analytics, monitoring, and troubleshooting capabilities for enterprise networks. Question 86: In model-driven programmability, which protocol is commonly used alongside YANG models? A) FTP B) NETCONF C) SMTP D) SNMP Answer: B Explanation: NETCONF is used in combination with YANG models to configure and manage network devices in a structured manner. Question 87: Which of the following best describes a container in Docker? A) A full virtual machine with its own OS kernel B) A lightweight, isolated execution environment for an application C) A physical server dedicated to one application D) A cloud-based development tool Answer: B Explanation: Docker containers are lightweight and isolated, bundling an application with its dependencies without needing a full OS. Question 88: What is the significance of using API documentation tools like Swagger? A) They compile code automatically B) They provide interactive documentation and testing capabilities for APIs C) They encrypt API traffic D) They optimize database queries Answer: B Explanation: Swagger provides interactive documentation and testing interfaces that make it easier for developers to understand and use APIs. Question 89: In Python, which symbol is used to denote a comment? A) // B) <!--
Question 95: Which of the following is a key characteristic of DevOps practices? A) Siloed development and operations teams B) Frequent communication and collaboration between teams C) Extended release cycles D) Manual code integration Answer: B Explanation: DevOps emphasizes collaboration, communication, and integration between development and operations teams to improve efficiency. Question 96: Which tool is most commonly used for container orchestration in production environments? A) Ansible B) Kubernetes C) Jenkins D) Maven Answer: B Explanation: Kubernetes is widely used for orchestrating containers in production, managing scaling and deployment. Question 97: In network troubleshooting, what does the traceroute command help determine? A) The speed of a network connection B) The path packets take from source to destination C) The encryption level of a network D) The status of a firewall Answer: B Explanation: Traceroute maps the path that packets follow to reach a destination, which is useful for diagnosing network issues. Question 98: What does the term “CI” in CI/CD primarily focus on? A) Continuous Improvement B) Continuous Integration C) Code Inspection D) Critical Infrastructure Answer: B Explanation: CI stands for Continuous Integration, which involves regularly merging code changes into a shared repository. Question 99: In Python, what is a “list comprehension” used for? A) Encrypting data B) Generating lists using a single, concise expression C) Managing file input/output D) Handling exceptions Answer: B Explanation: List comprehensions provide a compact way to create lists by iterating over an iterable in a single line.
Question 100: Which Cisco platform allows developers to access and interact with Cisco device APIs? A) Cisco Webex B) Cisco DevNet C) Cisco Prime D) Cisco Jabber Answer: B Explanation: Cisco DevNet is the developer community and resource hub for accessing Cisco APIs and development tools. Question 101: Which method in RESTful APIs is used to modify an existing resource partially? A) POST B) GET C) PATCH D) DELETE Answer: C Explanation: PATCH is used to apply partial modifications to a resource, whereas PUT is used to replace it entirely. Question 102: What is one of the key benefits of automated testing in infrastructure changes? A) It increases manual configuration B) It reduces the risk of introducing errors C) It slows down the deployment process D) It eliminates the need for version control Answer: B Explanation: Automated testing helps ensure that infrastructure changes do not introduce errors, enhancing reliability and stability. Question 103: In Python, what is the output of the expression len("Cisco")? A) 4 B) 5 C) 6 D) 7 Answer: B Explanation: The string "Cisco" has 5 characters, so len("Cisco") returns 5. Question 104: Which term refers to the process of integrating code changes frequently in a shared repository? A) Code deployment B) Continuous integration C) Code branching D) Code refactoring Answer: B Explanation: Continuous integration involves merging code changes frequently and running automated tests to ensure integration quality. Question 105: Which network layer in the OSI model is responsible for path determination and logical addressing?
