Evaluate an Application Design Considering High-Availability and Resiliency (including On-Premises, Hybrid, and Cloud) 350-901 Practice Questions (Page 7)

Questions 31–35

1. 31foundation · easy

   A database is configured to synchronously replicate writes to a standby replica. What is the primary trade-off of this approach?

   • AIncreased write latency
   • BLower read throughput
   • CReduced data durability
   • DNo impact on performance
   Reveal Solution Discussion Select an answer first
2. 32expert · hard

   A company runs a legacy application on-premises that cannot be modified to run in the cloud. The application must have an RTO of 1 hour and an RPO of 15 minutes. The company has a cloud subscription and wants to use it for disaster recovery. The application data is stored in a database that supports log shipping. Which strategy should they use?

   • AUse a backup-and-restore strategy with a daily backup stored in the cloud and a manual failover runbook.
   • BUse a pilot light approach by keeping the cloud infrastructure stopped and only starting it when a disaster is declared, then restoring the latest backup.
   • CSet up a warm standby in the cloud by restoring the database from a recent backup and continuously shipping transaction logs to the cloud database.
   • DImplement a multi-site active-active configuration by replicating the on-premises application to the cloud in real time.
   Reveal Solution Discussion Select an answer first
4. 33foundation · easy

   Which cloud-native service is designed to automatically distribute incoming traffic across multiple instances of an application?

   • AObject storage
   • BVirtual private cloud
   • CLoad balancer
   • DAuto-scaling group
   Reveal Solution Discussion Select an answer first
5. 34application · medium

   A company runs a customer-facing API. During a recent incident, a downstream dependency became slow, causing the API to time out and return errors to all users. The company wants to ensure that a slow dependency does not cause a complete outage. Which design principle should they implement?

   • AImplement a circuit breaker pattern to stop calling the dependency after a threshold of failures and return a cached or default response.
   • BIncrease the timeout value for the API calls to the dependency to allow more time for a response.
   • CUse a retry mechanism with exponential backoff to give the dependency more time to recover.
   • DDeploy the API on more instances to handle the increased load from the slow dependency.
   Reveal Solution Discussion Select an answer first
6. 35foundation · easy

   A load balancer is configured to send each new request to the next server in a rotating list. Which load balancing algorithm is this?

   • ARound-robin
   • BWeighted round-robin
   • CIP hash
   • DLeast connections
   Reveal Solution Discussion Select an answer first