1. Cloud Architecture intermediate

    A cost-sensitive education platform must serve large enrolment spikes and heavy video delivery on a tight budget. Which architectural choices give the largest cost reduction per unit of effort?

    2 min answer physics-wallahcostcdnegress
  2. Cloud Architecture intermediate

    A team tells you backups run nightly and are retained for 30 days. What is missing from that answer?

    2 min answer backupdisaster-recoveryverificationransomware
  3. Cloud Architecture intermediate Multiple choice

    A team wants to build a new internal API on serverless functions. It will serve steady traffic of about 200 requests per second during business hours. What do you advise?

    2 min answer serverlesscontainerscostdecision-making
  4. Cloud Databases intermediate Multiple choice

    A managed database performs a routine minor-version upgrade with a 40-second failover. The application returns errors throughout. Whose problem is this?

    2 min answer managed-servicesfailoverresilienceretries
  5. Cloud Databases intermediate

    A multi-product SaaS company runs its own database clusters on cloud instances and is considering moving to the provider's managed database service. What evidence should decide it?

    2 min answer managed-servicesdatabasesoperational-costatlassian
  6. Cloud Databases intermediate Multiple choice

    A serverless API works in testing and fails under load with connection errors. The database is at 5% CPU. Explain and fix.

    2 min answer serverlessconnectionsproxyscaling
  7. Disaster Recovery intermediate

    An enterprise platform with strict availability commitments must define its disaster recovery strategy. How should RTO and RPO targets drive the choice between backup restore, warm standby, and active-active?

    2 min answer disaster-recoveryrtorpocost
  8. Cloud Governance intermediate

    A DR test fails: the secondary region cannot launch enough instances. What happened, and what standing checks prevent it?

    2 min answer quotasdrgovernance
  9. Cloud Governance intermediate

    A platform's cloud spend has grown faster than traffic for six consecutive quarters, with no single service responsible. What governance changes address this, and why do purely technical optimisations fail to hold?

    2 min answer cloud-governancefinopscost-attributionaccountability
  10. Load Balancing intermediate

    A live-learning platform expects a synchronised audience for a single scheduled class. How should video delivery, interactive features, enrolment and notifications be architected differently from each other?

    2 min answer unacademylive-videocdnfan-out
  11. Load Balancing intermediate Multiple choice

    A mobility platform must route API traffic, long-lived driver location streams and internal service calls. Which load-balancing layer suits each, and what breaks if one choice is applied uniformly?

    2 min answer load-balancinglayer4layer7websockets
  12. Load Balancing intermediate

    Every deployment produces a small spike of 502s that the team has learned to ignore. Fix it.

    2 min answer drainingdeploymentgraceful-shutdown