200-901 Practice Test 1 — 10 Questions

Question 1

Which Meraki API response header provides information for paginating through a large result set?

Accepted Answer

Link. Meraki uses the Link header (LinkHeader) with 'next' and 'prev' URLs, or alternatively the startingAfter/endingBefore parameters. The Link header is standard for pagination.

Answer

Content-Range

Answer

X-RateLimit-Remaining

Answer

Retry-After

Question 2

An engineer is using EEM on an IOS XE device. They want to trigger an applet when a specific syslog message appears. Which event trigger type should they use?

Accepted Answer

event syslog pattern. The 'event syslog pattern' trigger in EEM (Embedded Event Manager) is specifically designed to fire an applet when a syslog message matching a regex pattern is logged. It watches the device's syslog stream and activates the applet when the pattern matches. This is the canonical trigger for reacting to specific log events on IOS XE.

Answer

event interface

Answer

event cli match

Answer

event timer

Question 3

A Python script uses the ncclient library to connect to a Cisco NX-OS device over NETCONF. After establishing the session, the script executes an editing operation with candidate datastore. Which additional step is required to make the changes take effect immediately on the running configuration?

Accepted Answer

Execute a commit operation on the candidate datastore. When using NETCONF with the candidate datastore on Cisco NX-OS, changes are staged in the candidate configuration and do not affect the running configuration until a commit operation is explicitly sent. The commit operation copies the candidate configuration to the running datastore, making the changes take effect immediately. Without this step, the candidate changes remain unapplied.

Answer

Execute a discard-changes operation on the candidate datastore

Answer

Execute a validate operation on the candidate datastore

Answer

No additional step is needed; candidate changes are automatically applied to running

Question 4

A network engineer is configuring EtherChannel between two switches. The switches are connected via four links. The engineer wants to load balance traffic based on source and destination IP addresses. Which configuration command should be used on Cisco IOS?

Accepted Answer

port-channel load-balance src-dst-ip. The command 'port-channel load-balance src-dst-ip' configures EtherChannel to use both the source and destination IP addresses in the hash algorithm, which is exactly what the engineer needs for load balancing based on source and destination IP addresses. This ensures traffic distribution across the four links by computing a hash on the combination of source and destination IPs, providing a balanced distribution for IP traffic.

Answer

port-channel load-balance src-ip

Answer

port-channel load-balance dst-ip

Answer

port-channel load-balance src-dst-mac

Question 5

A Python script used for network automation requires storing an API secret. Which approach is the most secure and recommended best practice?

Accepted Answer

Use environment variables. Storing secrets in environment variables decouples sensitive data from the source code, preventing accidental exposure in version control systems like Git. This approach follows the principle of least privilege and is recommended by security best practices such as the Twelve-Factor App methodology. Environment variables are managed outside the script, reducing the risk of credential leakage during code sharing or deployment.

Answer

Hardcode the secret in the Python script

Answer

Store the secret in a plain text file in the repository

Answer

Encrypt the secret and store it in the script

Question 6

A Python script uses a dictionary to store device configuration parameters. Which key, if any, will raise a KeyError if it does not exist in the dictionary?

Accepted Answer

config['timeout']. Using square bracket notation (config['timeout']) on a dictionary will raise a KeyError if the specified key does not exist. This is a fundamental behavior of Python dictionaries: direct key access without a fallback mechanism throws an exception when the key is missing.

Answer

config.setdefault('timeout', 30)

Answer

config.get('timeout')

Answer

config.pop('timeout', None)

Question 7

Which data structure in Python would be most appropriate for storing a collection of unique items and performing fast membership tests?

Accepted Answer

Set. A set is the correct choice because it is implemented as a hash table in Python, which provides O(1) average-time complexity for membership tests using the `in` operator. Sets automatically enforce uniqueness, meaning duplicate items are not allowed, making them ideal for storing a collection of distinct elements. This directly matches the requirement for fast membership testing and uniqueness.

Answer

Tuple

Answer

List

Answer

Dictionary

Question 8

An application uses UDP. Which characteristic is true about this application's communication?

Accepted Answer

It is connectionless. UDP is a connectionless transport protocol, meaning it does not establish a dedicated end-to-end connection before sending data. This characteristic allows for low-latency, best-effort delivery without the overhead of connection setup, which is ideal for applications like DNS queries or streaming media where speed is prioritized over reliability.

Answer

It guarantees packet delivery

Answer

It retransmits lost packets

Answer

It performs a three-way handshake

Question 9

A network automation engineer is evaluating options for model-driven programmability on Cisco devices. Which THREE are valid YANG model sources or tools? (Choose three.)

Accepted Answer

pyang. pyang is a YANG tool, yangcatalog.org is a repository, and Cisco native models are valid sources. OpenConfig is a standard, but oc-interfaces is a model, not a source/tool.

Answer

NETCONF

Answer

oc-interfaces

Question 10

Drag and drop the steps to set up a Python virtual environment for a DevNet project into the correct order.

Accepted Answer

Create virtual environment, Activate virtual environment, Install required packages, Deactivate virtual environment. Virtual environments isolate dependencies; creation, activation, package installation, and deactivation are standard steps.

Answer

Activate virtual environment, Create virtual environment, Install required packages, Deactivate virtual environment

Answer

Create virtual environment, Install required packages, Activate virtual environment, Deactivate virtual environment

Answer

Create virtual environment, Activate virtual environment, Deactivate virtual environment, Install required packages