200-901 Practice Test 37 — 15 Questions

Question 1

A Kubernetes pod runs two containers that need to share a filesystem. Which volume type should be used to enable file sharing between the containers within the same pod?

Accepted Answer

emptyDir. An `emptyDir` volume is created when a pod is assigned to a node and exists for the lifetime of that pod. All containers in the pod can mount the same emptyDir at different paths and read/write the same files, making it the canonical choice for intra-pod file sharing. It is deleted when the pod is removed.

Answer

configMap

Answer

hostPath

Answer

persistentVolumeClaim

Question 2

Which TWO of the following are southbound protocols in SDN?

Accepted Answer

NETCONF. NETCONF (B) is correct because it is a southbound protocol used between an SDN controller and managed network devices, allowing configuration data to be retrieved, edited, and committed via YANG-modeled operations over SSH. OpenFlow (D) is correct because it is the classic southbound protocol that lets an SDN controller program the forwarding tables of switches in the data plane. OSPF (A) is a routing protocol used between routers to exchange topology information, not a controller-to-device SDN southbound interface. SNMP (C) is a network management protocol for monitoring and managing devices, but it is not the standard SDN southbound control protocol. REST (E) is typically a northbound API style used by applications to communicate with the SDN controller, not a southbound protocol.

Answer

OSPF

Answer

SNMP

Answer

REST

Question 3

Drag and drop the steps to configure a static route on a Cisco IOS router into the correct order.

Accepted Answer

Enter global configuration mode, then configure the static route using the ip route command with the destination network, subnet mask, and next-hop address, then verify with the show ip route command. Static routes require global config mode and must specify the destination network, subnet mask, and next-hop address or exit interface.

Answer

Configure the static route using the ip route command first, then enter global configuration mode, then verify with show ip route

Answer

Enter global configuration mode, then verify with show ip route, then configure the static route using the ip route command

Answer

Verify with show ip route, then enter global configuration mode, then configure the static route using the ip route command

Question 4

Which NX-OS API method allows sending CLI commands in JSON format without enabling any additional features?

Accepted Answer

NX-API method 'cli' with JSON encoding. The NX-API 'cli' method with JSON encoding allows an administrator to send standard NX-OS CLI commands wrapped in a JSON payload over HTTP/HTTPS to the NX-API endpoint, and it works without enabling additional model-driven features like RESTCONF or NETCONF. It is the simplest NX-API method because it reuses existing CLI syntax rather than requiring YANG models. This is why it is the correct answer for sending CLI commands in JSON without extra feature enablement.

Answer

RESTCONF with YANG data

Answer

SNMP with MIB objects

Answer

NETCONF with XML data

Question 5

A DevOps engineer is using the Cisco Meraki API to retrieve a list of networks. Which HTTP method should be used?

Accepted Answer

GET. The GET method is the correct HTTP verb for retrieving a list of networks from the Cisco Meraki API because it is a read-only operation that fetches existing resources without modifying server state. The Meraki API follows RESTful conventions where GET requests are used to query collections or individual resources, and the endpoint for listing networks is typically a GET to /organizations/{organizationId}/networks.

Answer

PUT

Answer

POST

Answer

DELETE

Question 6

A developer uses RESTCONF to configure a network device. What is the correct content-type header to send in the request?

Accepted Answer

application/yang-data+json. RESTCONF, defined in RFC 8040, uses YANG-modeled data and requires the content-type header to indicate the YANG data representation. The correct media type for JSON-encoded YANG data is application/yang-data+json, which tells the server the payload conforms to the YANG data model in JSON format. This is the standard content type for RESTCONF JSON requests.

Answer

application/json

Answer

application/xml

Answer

text/plain

Question 7

An automation script using Ansible tries to configure IP address 192.168.1.2 on GigabitEthernet0/1. After running, the interface remains administratively down. What is the first thing to check?

Accepted Answer

The 'no shutdown' command was not included in the configuration. The 'no shutdown' command is required to administratively enable an interface on Cisco IOS devices. Without it, the interface remains in an administratively down state regardless of IP configuration. Ansible automation scripts must include this command in the task or playbook to bring the interface up.

Answer

The VLAN configuration

Answer

The IP address is a duplicate

Answer

The interface is faulty

Question 8

A network engineer writes a Python script to handle exceptions when making REST API calls. Which exception type should be caught to handle network connectivity issues (e.g., DNS failure, refused connection)?

Accepted Answer

requests.exceptions.ConnectionError. `requests.exceptions.ConnectionError` is specifically raised when the underlying TCP connection fails, which includes scenarios like DNS resolution failures, refused connections, or the remote host being unreachable. This exception is a subclass of `RequestException` and directly maps to network-level issues at the transport layer, making it the precise exception to catch for connectivity problems.

Answer

requests.exceptions.RequestException

Answer

requests.exceptions.HTTPError

Answer

requests.exceptions.Timeout

Question 9

When designing a REST API endpoint to update a network device's configuration, which HTTP method should be used?

Accepted Answer

PUT. PUT is the correct HTTP method for updating a network device's configuration because it is idempotent and replaces the entire resource at the specified URI. In RESTful design, PUT is used to update or create a resource when the client sends a full representation of the resource, which aligns with replacing the entire device configuration.

Answer

POST

Answer

DELETE

Answer

PATCH

Question 10

A developer is using the Webex API to create a webhook that triggers when a new message is posted in a room. What information is typically included in the webhook payload sent by Webex to the callback URL?

Accepted Answer

The resource type, event type, and relevant IDs (e.g., message ID, room ID). Webhook payloads contain event details such as resource, event type, and relevant data like message ID and room ID. The full message content is not included; the application must fetch it via API.

Answer

The full message content and all room members

Answer

The OAuth token for the bot

Answer

The complete list of webhooks configured on the account

Question 11

Which HTTP method should be used to partially update an existing resource in a REST API?

Accepted Answer

PATCH. PATCH is used for partial updates, while PUT replaces the entire resource.

Answer

PUT

Answer

DELETE

Answer

POST

Question 12

A developer is building a chat application that requires low-latency communication, and occasional packet loss is acceptable. Which transport protocol should the developer choose?

Accepted Answer

UDP. UDP is the correct choice because it provides low-latency, connectionless communication without retransmission or congestion control, making it ideal for real-time chat applications where occasional packet loss is acceptable. Unlike TCP, UDP does not require a handshake or acknowledgment, minimizing delay and overhead.

Answer

RTP

Answer

QUIC

Answer

TCP

Question 13

Which wireless standard operates in both 2.4 GHz and 5 GHz bands and is commonly known as Wi-Fi 6?

Accepted Answer

802.11ax. The IEEE 802.11ax standard, marketed as Wi-Fi 6, is designed to operate in both the 2.4 GHz and 5 GHz frequency bands. It introduces efficiency improvements like OFDMA and MU-MIMO to better handle dense environments. Unlike 802.11ac, which is limited to 5 GHz, 802.11ax supports dual-band operation, making it backward compatible with older devices on both bands.

Answer

802.11n

Answer

802.11ac

Answer

802.11g

Question 14

A network engineer is designing a subnetting scheme for a company that requires 5 subnets from the 192.168.1.0/24 network. What subnet mask should be used, and how many usable hosts per subnet will be available?

Accepted Answer

255.255.255.224 with 30 usable hosts per subnet. To get 5 subnets from 192.168.1.0/24, you need to borrow 3 bits (2^3 = 8 subnets, which covers 5). Borrowing 3 bits extends the prefix from /24 to /27, giving a subnet mask of 255.255.255.224. Each /27 subnet has 32 addresses, and after subtracting the network and broadcast addresses, 30 usable host addresses remain.

Answer

255.255.255.192 with 62 usable hosts per subnet

Answer

255.255.255.240 with 14 usable hosts per subnet

Answer

255.255.255.248 with 6 usable hosts per subnet

Question 15

A network administrator needs to assign IP addresses to devices on a subnet with a /25 prefix. How many usable host addresses are available?

Accepted Answer

126. A /25 subnet has 7 bits for hosts (32-25=7), giving 2^7 = 128 total addresses, minus 2 (network and broadcast) = 126 usable hosts.

Answer

254

Answer

64

Answer

128