200-901 practice questions 231–240

1. Question 231 · 530 in bank

   A developer is developing a web application that uses username and password to authenticate to the next service. The user credentials must be available at any time in the application. The developer must choose and implement a secure method of storing the authentication credentials that are used in the automation code. Which password handling method must be used to minimize the security risk?

   • AStore the username and password in a separate configuration file.
   • BStore the username and password in a vault.
   • CStore the passwords in a dictionary.
   • DStore the username and password in code.

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   Answer: B

   Explanation

   Option B is the correct answer. Storing the username and password in a separate configuration file can potentially expose the credentials to unauthorized users if the file is not properly secured. It is generally more secure to store sensitive information, such as passwords, in a secure storage system, such as a vault, rather than in a configuration file or in code.

   Source: Adapted from community discussion — mellohello

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2. Question 232 · 530 in bank

   What is a capability of the AXL API?

   • AIt signs a user in to a phone that is configured for extension mobility.
   • BIt pulls logs for the Cisco Tomcat service.
   • CIt authenticates users who exist in Cisco Unified Communications Manager.
   • DIt provides support for HTTP and HTTPS communications.

   Show answer

   Answer: C

   Explanation

   The AXL API is a set of web services that enables third-party applications to interact with Cisco Unified Communications Manager (UCM). It provides a way for external applications to perform operations such as add, update, or delete users, devices, and phone features in UCM. One of its capabilities is to authenticate users who exist in UCM. Therefore, the correct answer is C. It authenticates users who exist in Cisco Unified Communications Manager.

   Source: Adapted from community discussion — mellohello

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3. Question 233 · 530 in bank

   A developer creates a program in which an object maintains a list of classes based on the observer pattern. The classes are dependent on the object. Whenever the state of the object changes, it notifies the dependent classes directly through callbacks. Which advantage of the observer pattern offers minimum dependencies and maximum flexibility between dependent objects or classes?

   • Atight coupling
   • Bcohesion
   • Cmediation
   • Dloose coupling

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   Answer: D

   Explanation

   loose coupling offers minimum dependencies and maximum flexibility between dependent objects or classes in the observer pattern. Loose coupling refers to the degree to which one object or class knows about or depends on another object or class. In the observer pattern, the object being observed (the "subject") maintains a list of dependent classes (the "observers"), but the subject and the observers have a minimal amount of knowledge about each other. This allows the subject and the observers to be changed or replaced independently without affecting the other.

   Source: Adapted from community discussion — mellohello

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4. Question 234 · 530 in bank

   What is a feature of XML compared to other data formats?

   • AIt uses tags to define the structure.
   • BIt uses parenthesis for key-value pairs.
   • CIt uses indentation to define the structure.
   • DIt uses namespaces for list representation.

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   Answer: A

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5. Question 235 · 530 in bank

   DRAG DROP -

   

   Refer to the exhibit. Drag and drop the actions from the left that the contents of this Dockerfile accomplish onto the right. Not all options are used.

   

   This is an interactive task on the real exam — a drag-and-drop, hotspot or ordering question. There is nothing to select here, so the answer is shown below for reference.

   Show the answer figure

   Answer: See figure below

   

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6. Question 236 · 530 in bank

   What is a capability of Ansible playbooks?

   • AThey execute scheduled tasks regularly.
   • BThey define the state for a device configuration.
   • CThey collect SNMP logs from networking devices.
   • DThey utilize the target device agent to execute.

   Show answer

   Answer: B

   Explanation

   Why option A is wrong: A. They execute scheduled tasks regularly: This statement is not accurate. Ansible playbooks are not designed to execute tasks regularly on a schedule like a task scheduler or cron job. While Ansible can be integrated with external schedulers, the playbooks themselves do not have built-in scheduling capabilities. Their primary purpose is to define and apply configurations in a declarative manner. In conclusion, the correct capability of Ansible playbooks is defining the desired state for a device configuration, making option B the correct choice.

   Source: Adapted from community discussion — knowyourself7

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7. Question 237 · 530 in bank

   What is the purpose of running tests before writing code in test-driven development?

   • Ato find unexpected failures in the tests
   • Bto demonstrate that the tests fail for expected reasons
   • Cto ensure that the tests pass
   • Dto provide proof of the work carried out

   Show answer

   Answer: B

   Explanation

   B. to demonstrate that the tests fail for expected reasons In Test-Driven Development (TDD), developers write tests before writing code. The purpose of running the tests before writing code is to demonstrate that the tests fail for expected reasons. This is because the tests are written to test the functionality that the developer is about to add to the codebase, and since that functionality does not yet exist, the tests should fail. This is an important step in the TDD process because it confirms that the tests are correctly identifying the missing functionality and that they are not passing due to an error in the tests themselves.

   Source: Adapted from community discussion — r0m

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8. Question 238 · 530 in bank

   Refer to the exhibit.

   

   The JSON data in the exhibit has been parsed and stored into a variable `data`. What returns the value `172.16.0.11`?

   • Adata['items']['host']['value']
   • Bdata['items'][1]['host']['value']
   • Cdata['items'][0]['host']['value']
   • Ddata['items']['host'][1]

   Show answer

   Answer: C

   Explanation

   C is correct - I was confused at first.. But i think: ITEMS - is a dictionary with a list as its value. This list has only one entry though - hence you need the positional arg 0 to target the nested K/V pairs.

   Source: Adapted from community discussion — kibo_muc

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9. Question 239 · 530 in bank

   Which port does HTTPS use by default?

   • A433
   • B443
   • C803
   • D883

   Show answer

   Answer: B

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10. Question 240 · 530 in bank

    Which HTTP method is used by webhooks and notifies a listener about an event change?

    • APUT
    • BPOST
    • CPATCH
    • DGET

    Show answer

    Answer: B

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200-901 practice, question 231. 530 questions available.