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20 multiple-choice questions and 14 flashcards on Storage Services, about 8% of the Azure AZ-900 Fundamentals bank. Every one carries a written rationale.
Storage Services is one of 7 chapters in CoStudy's Azure AZ-900 Fundamentals bank, and it holds 20 of the bank's 251 multiple-choice questions — roughly 8% of the total. That proportion is not arbitrary: chapters follow the certifying body's published exam outline, and the number of questions in each is set by that domain's published weight, so the share of your practice time this chapter takes matches the share of the real exam it accounts for.
Studying by chapter is worth doing once you have a diagnostic score. A single overall percentage tells you whether you are close; it does not tell you which domain is dragging. Working a weak chapter in isolation, and re-testing it in isolation, is the fastest way to move a score that has stalled — and it is why the mock exams in CoStudy report by domain rather than as one number.
5 questions drawn from this chapter, with the full rationale shown — the controlling principle behind the right answer, and why each wrong option tempts and fails.
Which storage type is BEST for sending messages between application components?
Answer: C — Queue
A) Object store. B) File share. C) Correct — Queue Storage (and Service Bus) provide messaging. D) Block storage for VMs.
Azure Managed Disks are BEST described as:
Answer: A — Persistent block storage attached to Azure virtual machines
A) Managed disks are persistent block volumes attached to VMs, with the platform handling the underlying storage accounts and placement. B) Distributed document storage is Azure Cosmos DB. C) Mountable shares are Azure Files. D) Backup retention is configured in Azure Backup policies.
Compliance records must be retained for seven years, are almost never read, and a retrieval delay of hours is acceptable. Which access tier is MOST appropriate?
Answer: C — Archive, because rehydration delay is acceptable
C) Correct — archive gives the lowest storage cost for rarely accessed data, with the tradeoff of a rehydration delay the scenario accepts. A) Hot suits frequently read data and would cost far more to store for seven years. B) Cool targets infrequent access measured in days to a month, but the data here is read far less often than that. D) Premium targets low latency and high transaction rates, the opposite of this profile.
Azure Files provides:
Answer: C — SMB and NFS file shares that clients can mount as drives
C) Azure Files exposes managed shares over SMB and NFS, which servers and clients mount like a traditional network drive. A) Object storage over REST is Blob storage. B) Long-term retention is the cool and archive blob tiers. D) Block devices for VMs are managed disks.
Which Azure storage tier is CHEAPEST but takes the longest to retrieve data from?
Answer: C — Archive
A) Hot = most expensive, instant access. B) Cool = lower cost, instant access; 30-day minimum. C) Correct — Archive: lowest cost, retrieval takes HOURS, 180-day minimum. Best for compliance/long-term backup. D) Premium = highest cost, lowest latency.
4 cards from the 14 in this chapter.
Distinguish AzCopy, Azure Storage Explorer and Azure File Sync.
AzCopy is a scriptable command-line tool for bulk copying blobs and files. Azure Storage Explorer is a graphical desktop application for browsing and managing storage data. Azure File Sync caches an Azure file share on Windows Servers on-premises and keeps them synchronised, replacing local file servers.
Azure Storage account types?
Blob (object), File (SMB shares), Queue (messaging), Table (NoSQL key-value), Disk (VM disks).
Name the four main Azure Storage redundancy options and what each survives.
LRS — three copies in one datacenter; survives disk or rack failure. ZRS — copies across three availability zones; survives a datacenter failure in the region. GRS — LRS plus asynchronous replication to a secondary region; survives regional loss. GZRS — ZRS in the primary plus a secondary region; survives both.
Azure Files vs Blob — when use which?
Files: SMB/NFS share, mount as drive. Blob: object storage via HTTP/REST, for unstructured data.
These are a sample. The full Storage Services chapter runs 34 items with per-chapter progress tracking, on the web and in the iOS app.
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