361.1 High Availability Concepts and Theory (weight: 6) LPIC-3-HIGH-AVAILABILITY Practice Questions (Page 4)

Questions 16–20

1. 16expert · hard

   A two-node cluster runs a critical application. The cluster uses a quorum disk to determine which node should be active in case of a network partition. The quorum disk is on a shared storage array. During a network failure between the two nodes, Node A can still reach the quorum disk, but Node B cannot. What is the expected behavior of the cluster?

   • ANode B will take over the cluster resources because it has the most recent data in its local cache.
   • BThe cluster will shut down both nodes to protect the integrity of the shared data.
   • CBoth nodes will continue to run the service, leading to a split-brain condition where both write to shared storage.
   • DNode A will take over the cluster resources, and Node B will be fenced to prevent it from accessing shared storage.
   Reveal Solution Discussion Select an answer first
2. 17foundation · easy

   What is the purpose of quorum in a cluster?

   • ATo ensure that only one partition of the cluster continues to operate in case of network partitioning
   • BTo speed up the failover process
   • CTo balance the load evenly across all nodes
   • DTo provide a backup of the cluster configuration
   Reveal Solution Discussion Select an answer first
4. 18application · medium

   An SRE team is responsible for a service with an SLO of 99.95% availability. The service has been stable for several months, and the team has accumulated a significant error budget. The team wants to introduce a new feature that requires a risky database migration. How should the team decide whether to proceed?

   • AIncrease the SLO to 99.99% to provide more room for the migration.
   • BProceed with the migration because the accumulated error budget provides a safety net for this kind of change.
   • CPostpone the migration indefinitely because any risk to availability is unacceptable.
   • DAssess the risk of the migration, ensure a rollback plan is in place, and then proceed if the potential downtime is within the remaining error budget.
   Reveal Solution Discussion Select an answer first
5. 19foundation · easy

   Which of the following best describes the primary goal of high availability in a computing system?

   • ATo reduce the cost of hardware and software infrastructure
   • BTo maximize system performance under peak load
   • CTo minimize downtime and ensure continuous service availability
   • DTo eliminate all possible points of failure in the system
   Reveal Solution Discussion Select an answer first
6. 20application · medium

   A company runs a customer relationship management (CRM) application that is heavily used during business hours (9 AM to 5 PM) but has very low usage at night. The application is stateful, and users must not lose their sessions. The company wants to minimize costs while ensuring that a single server failure does not cause a significant outage. Which architecture is most suitable?

   • ASingle server with a nightly backup and a documented manual recovery procedure.
   • BActive-passive cluster with the passive node powered off during off-hours and started automatically when the active node fails.
   • CActive-active cluster with both nodes serving traffic and a shared session store to ensure session persistence.
   • DActive-passive cluster with the passive node always on and synchronized, but with no shared session store.
   Reveal Solution Discussion Select an answer first