200-901 Practice Test 7 — 10 Questions

Question 1

A developer runs 'docker run -d -p 8080:80 --name web nginx:alpine'. The container fails to start. Which command is the most appropriate to investigate the issue?

Accepted Answer

docker logs -f web. `docker logs -f web` streams the container's stdout and stderr output, which typically contains the error message explaining why the container failed to start (e.g., port conflict, missing configuration, or process crash). Since the container is not running, `docker logs` is the primary diagnostic tool to retrieve its exit logs without requiring the container to be active.

Answer

docker inspect web

Answer

docker exec -it web bash

Question 2

Refer to the exhibit. A developer sends a PUT request to the RESTCONF endpoint with the above JSON payload. The device already has interface GigabitEthernet1/0/1 configured with IP address 10.10.10.1/24. What is the expected outcome?

Accepted Answer

The request succeeds and the interface configuration remains unchanged.. D is correct because the PUT request to the RESTCONF endpoint with the provided JSON payload is an idempotent operation. Since the interface GigabitEthernet1/0/1 already exists with the exact same configuration (IP address 10.10.10.1/24), the PUT request effectively replaces the resource with the same data, resulting in no change. RESTCONF uses the HTTP PUT method to create or replace a resource, and if the resource already exists and the payload matches, the operation succeeds without modification.

Answer

The request fails because the interface already exists.

Answer

The request creates a new interface with the same configuration.

Answer

The request fails because the JSON is malformed.

Question 3

A developer is using the Cisco Webex API to send a message to a specific room. They have the room ID. Which endpoint and method should they use?

Accepted Answer

POST /v1/messages with roomId in the body. To send a message to a Webex room, the correct endpoint is POST /v1/messages with roomId in the body.

Answer

PUT /v1/messages/{messageId}

Answer

POST /v1/rooms with roomId in the body

Answer

GET /v1/messages?roomId=...

Question 4

A developer is writing an application that needs to send a large amount of data reliably over a network. Which transport layer protocol should the developer use?

Accepted Answer

TCP. TCP (Transmission Control Protocol) is the correct choice because it provides reliable, connection-oriented data delivery with acknowledgments, retransmission, and sequencing. This ensures that large amounts of data are transmitted without loss or corruption, which is critical for applications requiring data integrity.

Answer

ICMP

Answer

HTTP

Answer

UDP

Question 5

Which OSI layer is responsible for routing packets across different networks?

Accepted Answer

Layer 3 (Network). The Network layer (Layer 3) is responsible for logical addressing and routing packets between different networks. Protocols like IP (IPv4/IPv6) use routing tables and algorithms (e.g., OSPF, BGP) to determine the best path for forwarding packets across multiple hops. Without Layer 3, traffic could not leave a local broadcast domain.

Answer

Layer 1 (Physical)

Answer

Layer 4 (Transport)

Answer

Layer 2 (Data Link)

Question 6

Which TCP flag is set in the second step of the three-way handshake?

Accepted Answer

SYN and ACK. The TCP three-way handshake begins with the client sending a SYN segment to initiate a connection. In the second step, the server responds with a SYN-ACK segment, which both acknowledges the client's SYN (using the ACK flag) and synchronizes its own sequence number (using the SYN flag). This combined flag is essential for establishing a reliable, bidirectional connection.

Answer

ACK

Answer

SYN

Answer

FIN

Question 7

A Kubernetes pod needs to run a database that requires persistent storage. Which volume type should be used to store data that persists beyond the pod lifecycle?

Accepted Answer

PersistentVolumeClaim. PersistentVolumeClaim requests persistent storage that survives pod restarts. emptyDir is ephemeral, hostPath ties to a node, configMap is for configuration.

Answer

emptyDir

Answer

configMap

Answer

hostPath

Question 8

A developer wants to automate the provisioning of a UCS server using Cisco Intersight. Which authentication method is recommended for programmatic access?

Accepted Answer

API Key with HMAC signing. Cisco Intersight recommends API key authentication with HMAC signing for programmatic access because it provides a secure, non-interactive method for automation scripts and tools. The API key consists of a key ID and a secret, and each request must include an HMAC signature generated from the request details, ensuring integrity and authenticity without exposing static credentials over the network.

Answer

Basic authentication with username and password

Answer

Session token from Intersight UI

Answer

OAuth2 with client credentials

Question 9

A developer needs to retrieve the current user's details from Webex API. Which endpoint should they call?

Accepted Answer

GET /v1/people/me. GET /v1/people/me returns details of the authenticated user.

Answer

GET /v1/rooms?me=true

Answer

POST /v1/people

Answer

GET /v1/people?email=current@user.com

Question 10

Which wireless security standard provides the strongest encryption and is recommended for enterprise networks as of 2023?

Accepted Answer

WPA3. WPA3 is the latest standard with stronger encryption (SAE) and is recommended for modern networks.

Answer

WEP

Answer

TKIP

Answer

WPA2