AZ-900 Describe cloud concepts Practice Question

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

• ✗

  Scalability and business continuity are unrelated cloud concepts

  Why it's wrong here

  Scalability and business continuity are not disjoint; instead, scalability is one of the operational mechanisms that enables continuity, since a sudden surge in users can exhaust fixed capacity and force an outage just as surely as a hardware failure can. Continuity planning addresses availability from multiple angles, including infrastructure failure, data loss, and demand overload, and autoscaling directly mitigates the overload scenario. Consequently, treating them as unrelated ignores a central resilience strategy in cloud architectures.

• ✓

  Scalability supports business continuity by handling unexpected demand without service disruption

  Why this is correct

  Elastic scaling provisions additional compute or database capacity in response to measured demand, so when traffic spikes exceed a typical load the system can absorb the increase without returning HTTP 503 errors or timing out requests. This operational resilience is a fundamental aspect of business continuity because it preserves service availability and user experience during an unexpected demand surge, rather than waiting for a disaster-recovery failover. Continuity plans must therefore include autoscaling rules and capacity thresholds to meet performance and availability goals.

• ✗

  Business continuity only requires geo-redundancy, not scalability

  Why it's wrong here

  Geo-redundancy protects against site-level failures, but it does nothing to prevent an availability incident caused by a sudden spike in traffic that overwhelms a single region's capacity. Business continuity requires a portfolio of strategies including backup/restore, failover, and elasticity; autoscaling specifically prevents outage from overload by matching capacity to real-time demand. Restricting continuity to geo-redundancy would leave systems vulnerable to demand-driven disruption, which is a common and realistic failure mode.

• ✗

  Scalability reduces the need for security controls in cloud environments

  Why it's wrong here

  Scaling out to more virtual machines or containers increases the attack surface and adds new endpoints, patches, and secrets that must be secured; it does not replace security controls such as Azure RBAC, network security groups, or disk encryption. A larger fleet multiplies the number of misconfigurations and vulnerabilities that need monitoring, so security effort typically grows with scale rather than shrinking. Therefore, the claim that scalability reduces the need for security controls inverts the operational reality of cloud environments.

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