Cloud Digital Leader Why cloud technology is transforming business Practice Question
A retail company needs to handle sudden spikes in customer traffic during holiday promotions without over-provisioning hardware. Which cloud characteristic directly enables this capability?
⚠ Common exam trap
Google Cloud often tests the distinction between elasticity and scalability, where candidates mistakenly choose load balancing or high availability because they associate traffic spikes with distribution or redundancy rather than dynamic resource adjustment.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Elasticity
Elasticity is the cloud characteristic that allows resources to automatically scale up or down in response to demand. For a retail company handling sudden traffic spikes, elasticity ensures compute and network capacity dynamically adjusts without manual intervention or over-provisioning, directly matching the workload in real time.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Load balancing
Why it's wrong here
Load balancing distributes incoming traffic across available backend instances, but it does not create new instances or remove idle ones. A load balancer can only route requests to the already-deployed capacity, so during a sudden spike it would send more traffic to the same fixed pool of resources, potentially saturating them. While load balancers are a vital component in front of an autoscaling fleet, they are not the mechanism that adjusts capacity to match demand.
- ✗
High availability
Why it's wrong here
High availability focuses on eliminating single points of failure through redundancy, health checks, and automatic failover, so that the service stays reachable if an instance or zone fails. However, it does not monitor metrics like CPU utilization or request queue depth to add or remove resources. Even a highly available system with a fixed number of replicas will still become overwhelmed by a traffic spike; the replicas are simply kept healthy, not expanded.
- ✓
Elasticity
Why this is correct
Elasticity is the cloud characteristic that automatically provisions and releases computing resources in proportion to actual demand. Managed instance groups with autoscaling policies observe metrics such as CPU utilization, request rate, or stackdriver signals, and then adjust instance counts accordingly. This capability directly handles sudden spikes by adding capacity ahead of saturation and scaling back down afterwards, making it the correct answer for dynamic, demand-driven capacity changes.
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Disaster recovery
Why it's wrong here
Disaster recovery encompasses the processes, policies, and backups used to restore systems and data after a catastrophic outage, usually with defined recovery time and point objectives. It is inherently reactive, triggered by a failure event, rather than proactive, responding to load in real time. A disaster recovery plan does not scale resources to absorb a traffic spike; it restores operations from snapshots or alternate sites after an incident.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This GCDL practice question is part of Courseiva's free Google Cloud certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the GCDL exam.