DIS Cloud Infrastructure 3 — Questions and Answers
Question 1: What does 'RPO' stand for in cloud disaster recovery planning for imaging systems?
- Recovery Point Objective (Correct answer)
- Replication Process Order
- Remote Provisioning Option
- Redundant Path Operation
Correct answer: Recovery Point Objective
Recovery Point Objective defines the maximum acceptable amount of data loss measured in time, guiding backup frequency for imaging archives.
Question 2: A cloud auto-scaling group for an imaging rendering workload should scale based on which metric to best match demand?
- Network packet count
- CPU utilization or custom application metrics (Correct answer)
- Storage IOPS only
- Number of S3 buckets
Correct answer: CPU utilization or custom application metrics
CPU utilization or application-specific metrics like queue depth most accurately reflect rendering workload demand and trigger appropriate scaling.
Question 3: Which cloud database type is best suited for storing flexible, schema-less imaging metadata with varying attributes per image?
- Relational (SQL) database
- NoSQL document database (Correct answer)
- In-memory cache
- Data warehouse
Correct answer: NoSQL document database
NoSQL document databases accommodate varying metadata schemas per document, making them ideal for heterogeneous imaging metadata.
Question 4: In cloud infrastructure for imaging, what is the role of an API gateway?
- Store raw image files
- Manage, secure, and throttle API calls to backend imaging services (Correct answer)
- Compress images before storage
- Replicate databases across regions
Correct answer: Manage, secure, and throttle API calls to backend imaging services
An API gateway acts as an entry point that handles authentication, rate limiting, and routing for all client requests to imaging backend services.
Question 5: When configuring VPC security groups for a cloud imaging server, what is the principle of least privilege applied as?
- Allowing all inbound traffic by default
- Opening only the specific ports required for imaging services (Correct answer)
- Using a single shared security group for all resources
- Disabling all outbound rules
Correct answer: Opening only the specific ports required for imaging services
Least privilege means permitting only the minimum necessary ports and protocols, reducing the attack surface of the imaging server.
Question 6: Which cloud monitoring approach proactively alerts a DIS team before an imaging storage bucket reaches capacity?
- Manual weekly storage audits
- Setting CloudWatch/cloud metric alarms on bucket size thresholds (Correct answer)
- Reviewing bills at month end
- Email notifications from storage vendors
Correct answer: Setting CloudWatch/cloud metric alarms on bucket size thresholds
Metric-based alarms automatically notify operations teams when storage usage crosses defined thresholds, enabling proactive capacity management.
Question 7: A cloud imaging workflow uses serverless functions to generate thumbnails. What is the key billing advantage of serverless over always-on VMs?
- Serverless has unlimited free storage
- You pay only for actual execution time, not idle time (Correct answer)
- Serverless never requires security patches
- VMs cannot run thumbnail generation
Correct answer: You pay only for actual execution time, not idle time
Serverless billing is based on the number of invocations and execution duration, eliminating costs for idle periods unlike continuously running VMs.
DIS Cloud Infrastructure 3
What does 'RPO' stand for in cloud disaster recovery planning for imaging systems?