361.1 High Availability Concepts and Theory (weight: 6) LPIC-3-HIGH-AVAILABILITY Practice Questions (Page 1)

Questions 1–5

1. 1foundation · easy

   Which cluster architecture is most suitable for a web application that needs to scale horizontally to handle variable traffic?

   • AActive-passive
   • BShared-nothing
   • CSingle-node
   • DActive-active
   Reveal Solution Discussion Select an answer first
2. 2foundation · easy

   What is a key trade-off of an active-active cluster architecture compared to active-passive?

   • AIt provides higher resource utilization but requires more complex coordination
   • BIt uses fewer hardware resources but has higher latency
   • CIt requires a dedicated quorum device to function
   • DIt is simpler to configure but offers lower availability
   Reveal Solution Discussion Select an answer first
4. 3expert · hard

   An online payment gateway has an SLO of 99.99% monthly availability. In the last 10 days, the service has been down for a total of 4 minutes due to two separate incidents. The SRE team is considering a new feature release that has a 20% chance of causing a 2-minute outage during deployment. Should the team proceed with the release this month?

   • ANo, because the remaining error budget is less than 1 minute, and any additional downtime could breach the SLO.
   • BYes, because the SLO is measured over a rolling 30-day period, and the incidents will age out of the window.
   • CNo, because any planned deployment that risks downtime is forbidden by the SLO.
   • DYes, because the expected downtime of 0.4 minutes (20% × 2 minutes) is well within the remaining error budget.
   Reveal Solution Discussion Select an answer first
5. 4foundation · easy

   What is the primary purpose of implementing redundancy in a high availability system?

   • ATo improve the speed of individual components
   • BTo reduce the overall power consumption of the system
   • CTo simplify the configuration of the system
   • DTo provide alternative components that can take over in case of failure
   Reveal Solution Discussion Select an answer first
6. 5expert · hard

   A three-node active-active cluster runs a critical database. The cluster uses a quorum-based algorithm to prevent split-brain. Node C has been experiencing intermittent hardware issues and the administrator wants to remove it for maintenance. The cluster currently has all three nodes healthy. What is the correct procedure to remove Node C without causing a service outage?

   • AFirst, gracefully remove Node C from the cluster configuration, then power it off for maintenance.
   • BShut down the entire cluster, remove Node C, and then restart the cluster with the two remaining nodes.
   • CAdd a fourth node to the cluster before removing Node C to maintain a majority quorum.
   • DPower off Node C immediately and then update the cluster configuration to reflect the new two-node cluster.
   Reveal Solution Discussion Select an answer first