Consul 1.15 Practice Test 3 — 10 Questions

Question 1

What is the default port used for WAN gossip between Consul servers?

Accepted Answer

8302. The default port for WAN gossip is 8302, distinct from the LAN gossip port 8301.

Answer

8301

Answer

8500

Answer

8300

Question 2

Which TWO of the following are prerequisites for successful WAN federation?

Accepted Answer

All datacenters must share the same 'primary_datacenter' setting.. WAN gossip ports must be open between server nodes, and the primary datacenter must be correctly identified.

Answer

All datacenters must have identical node names.

Answer

Consul clients must be able to communicate directly with all remote servers.

Answer

All nodes must be in the same subnet.

Question 3

Which command-line interface command is used to set a value in the Consul KV store?

Accepted Answer

consul kv put. The 'consul kv put' command is the standard CLI utility for setting key values.

Answer

consul kv write

Answer

consul kv set

Answer

consul kv update

Question 4

What happens to a session if the associated node is marked as 'failed' by the Consul health check?

Accepted Answer

The session is invalidated when the TTL expires.. When a node fails, the sessions associated with that node are invalidated after the session TTL expires.

Answer

The session stays active.

Answer

The session is immediately deleted.

Answer

The session is transferred to another node.

Question 5

Which THREE of the following are standard Consul KV CLI subcommands?

Accepted Answer

put. 'put', 'get', and 'delete' are the standard CLI subcommands for KV.

Answer

describe

Answer

list

Question 6

A service is intermittently failing to resolve via DNS because it has multiple health checks, some of which are 'warning'. How do you ensure it is only returned when all checks are 'passing'?

Accepted Answer

Use the 'passing' query parameter in the DNS request.. Consul DNS returns services if they are not in a 'critical' state by default; enforcing strict 'passing' requires query parameters.

Answer

Configure 'service_prefix' in DNS settings.

Answer

Use the 'stale' query parameter.

Answer

Set 'enable_tag_override' to true.

Question 7

Which THREE network considerations are vital for Consul WAN federation?

Accepted Answer

Sufficient bandwidth for gossip heartbeat messages.. WAN federation requires specific port accessibility, bandwidth for gossip, and routing between servers.

Answer

A shared NAT gateway for all datacenters.

Answer

Uniform MTU settings across all regions.

Question 8

If you need to perform an HTTP check over HTTPS, what configuration option is required to handle self-signed certificates?

Accepted Answer

tls_skip_verify. The 'tls_skip_verify' parameter allows the agent to skip verification of the service's TLS certificate.

Answer

tls_insecure

Answer

disable_tls

Answer

ignore_cert

Question 9

What information does the Consul HTTP API return for a health check? (Select TWO)

Accepted Answer

Output. The API returns the status and the human-readable output of the check.

Answer

Service CPU usage

Answer

Service port

Answer

Check uptime

Question 10

Which of the following are true regarding TTL checks? (Select TWO)

Accepted Answer

They require the app to push updates. TTL checks do not have an interval and require manual updates.

Answer

They are automatically removed

Answer

They are faster than script checks

Answer

They are polled at a fixed interval