Q1. Why use a DBMS instead of storing data in files?
A file system stores bytes in files and directories but knows nothing about their structure. A DBMS adds a layer that understands records, types, relationships and constr...
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Q2. What is the difference between Docker volumes and bind mounts?
Both persist data outside the container's writable layer, but they are managed differently. - Volumes are stored in a Docker-managed location under /var/lib/docker/volume...
Q3. When would you choose S3 over EBS?
Choose S3 when you need durable, virtually unlimited object storage accessible over HTTP from anywhere. Choose EBS when you need a block device attached to a single EC2 i...
Q4. Explain Azure Blob Storage access tiers.
Blob Storage offers tiers that trade storage cost against access cost and latency. - Hot: frequent access, highest storage cost, lowest access cost. - Cool: infrequent ac...
Q5. Compare the GCP Cloud Storage classes.
Cloud Storage classes trade storage cost for retrieval cost and minimum storage duration. - Standard: frequent access, no minimum duration. Best for hot data and serving ...
Q6. How do you diagnose disk I/O issues on Linux?
Measure latency and utilisation, then find the culprit. 1. Space versus inodes: use df -h and df -i. A full inode table also breaks writes. 2. Utilisation and latency: ``...
Q7. What is the difference between Azure managed disks and a storage account?
Managed disks are block-level volumes for Azure VMs, managed by Azure. A storage account is a broader namespace that hosts blobs, files, queues, and tables, and previousl...
Q8. What is the difference between EC2 instance store and EBS?
Both provide block storage to EC2, but with different durability and lifecycle. - Instance store is physically attached NVMe or SSD storage on the host. It offers very hi...
Q9. What is HTML5 web storage?
HTML5 Web Storage is a mechanism in modern web browsers that allows web applications to store data locally within the user's browser. It provides two storage options: Loc...