Explain Fault Tolerance Techniques - Application and Availability Zones DATA-PROTECTION-MANAGEMENT-FOUNDATIONS Practice Questions (Page 2)

Questions 6–10

1. 6application · medium

   A company runs a customer-facing web application in a single Azure region. They want to protect against a failure of an entire physical data center building. They plan to deploy the application across two separate availability zones in the same region. Which benefit does this architecture provide?

   • AProtection against a failure of one physical data center building
   • BGuaranteed zero downtime during any hardware failure
   • CElimination of the need for load balancing or health probes
   • DProtection against a regional outage that affects the entire Azure region
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2. 7expert · hard

   A company runs a mission-critical application in two availability zones. The application is stateful and uses a zone-redundant database. During a zone failure, the database fails over to the other zone. The application VMs in the failed zone are lost. The VMs in the remaining zone are running at 80% CPU. What is the most likely impact on the application?

   • AThe application remains available but may experience performance degradation due to reduced capacity
   • BThe application becomes unavailable because the remaining zone cannot handle the full workload
   • CThe application remains fully available with no performance impact because the database is zone-redundant
   • DThe application becomes unavailable because the database failover takes too long
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4. 8application · medium

   A company is comparing availability zones with a traditional replication-based approach for their database. The database currently uses asynchronous replication to a standby server in the same data center. They are considering moving to a zone-redundant database deployment. What is the primary advantage of the zone-redundant deployment?

   • AIt reduces the latency of database writes because replicas are closer
   • BIt provides protection against a physical data center failure, which the same-data-center replication does not
   • CIt eliminates the need for any replication because zones handle data redundancy automatically
   • DIt guarantees zero data loss during any failure scenario
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5. 9application · medium

   A company is deploying VMs to two availability zones. They want to ensure that if one zone fails, the VMs in the other zone can handle the full production workload. Which configuration is necessary?

   • ADeploy the same number of VMs in each zone and rely on the load balancer to redistribute traffic
   • BConfigure each zone's VM scale set with enough instances to handle the full workload independently
   • CUse a larger VM size in the second zone to compensate for the first zone's capacity
   • DPlace all VMs in a single availability set within one zone
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6. 10foundation · easy

   How do availability zones enable fault tolerance by isolating failures?

   • AZones automatically replicate data to a different region
   • BZones use virtual machines that can migrate between zones without any downtime
   • CAll zones share the same power source, so a failure affects all zones equally
   • DIf one zone fails, the other zones continue to operate, preventing a single point of failure
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