Amazon AWS Certified Solutions Architect - Associate SAA-C03 Practice Test 49

Question 480

An on-premises File Gateway VM is shut down before its dirty cache uploads complete. After restart, some files are missing in S3. What caused the data loss window?

The gateway had acknowledged local cached writes that were not yet uploaded to durable S3 before shutdown.
File Gateway sends every completed SMB write synchronously into every S3 Region before acknowledging it.
Force shutdown the on-premises File Gateway while its CachePercentDirty metric remains high, assuming SMB acknowledgement means all changed blocks are already durable in S3.
Enable S3 versioning on the destination bucket and assume versioning guarantees that dirty gateway cache bytes that never uploaded are recoverable from S3.

Explanation

Correct Answer

File Gateway writes are locally cached and asynchronously uploaded; monitor CachePercentDirty and graceful shutdown.

Incorrect Answers

The local cache/writeback contract is asynchronous.

File Gateway can acknowledge application writes to local cache before asynchronous upload completes. Shutting it down without a clean flush/operational procedure risks leaving undelivered dirty data.

Bucket versioning protects object versions that reached S3, not data still only present in a local gateway cache. Upload completion and safe shutdown procedures remain necessary.

Question 481

A DataSync task copied millions of files, but the engineer reports “all done” based solely on task status while the required destination file checksum verification was disabled. What evidence is still missing?

A verified integrity check or DataSync verification of copied file content and metadata within supported settings.
Compare only the number of source and destination filenames and assume identical counts prove byte-for-byte content and metadata matches.
Inspect only S3 object LastModified timestamps and treat matching dates as a cryptographic checksum for the entire migrated NAS dataset.
The task name uniquely guarantees all files match regardless of verification.

Explanation

Correct Answer

Transfer completion and content verification are related but distinguishable deliverables.

Incorrect Answers

Matching file counts do not prove contents, metadata, permissions or checksums agree. Use a supported DataSync verification mode and inspect transfer/task reports.

Timestamps can indicate changes but do not prove content equality or copied metadata; content verification provides stronger evidence.

Administrative labels do not validate data integrity.

Question 482

A client immediately spikes to a very high S3 request rate on a newly created hot key prefix and sees intermittent 503 Slow Down, even though the bucket is healthy. What should it do?

Apply adaptive retries/backoff, monitor prefix request load and ramp/distribute access patterns as needed.
Conclude S3 Standard supports only one request per second per bucket.
Increase S3 bucket name length to change partition placement.
Turn off all client retries and repeat failures immediately in a tight loop.

Explanation

Correct Answer

S3 scales dynamically and can temporarily throttle sudden rate changes; an incremental measured ramp helps.

Incorrect Answers

Modern S3 supports far higher rates per prefix.

Name length is not the documented scaling control.

Unbounded aggressive retries can exacerbate throttling.

Question 483

After expanding an EC2 EBS volume from 100 GiB to 300 GiB, Linux lsblk shows the larger block device. The filesystem lives on an LVM logical volume, and pvs/lvs still report the original smaller physical/logical volumes. Which layer must be grown?

Modify the S3 bucket storage class because Linux LVM capacity is controlled by the object-store lifecycle tier.
Increase only the instance EBS networking bandwidth and expect the guest LVM metadata to discover free logical extents without any change.
Reformat the current mounted logical volume without backing up data or resizing the physical volume, assuming this is the normal nondestructive expansion method.
Extend the LVM physical volume and appropriate logical volume, then grow the filesystem with supported tools and checks.

Explanation

Correct Answer

With LVM, the EBS modification is only the first step: use the appropriate pvresize and lvextend workflow, followed by ext4/XFS filesystem growth, so the guest filesystem can use expanded capacity.

Incorrect Answers

S3 storage classes do not determine the size of a Linux physical/logical volume that sits on an attached EBS block device.

The EC2/EBS device reports larger raw capacity, but LVM tracks its own physical and logical allocations. Faster host EBS transport is not an LVM resize operation.

Reformatting destroys the filesystem layout and does not safely extend the logical volume. Use the LVM resize workflow with a recovery snapshot and validation.

Question 484

A versioned S3 bucket contains several historical revisions of a critical object. An operator deletes the current key; ordinary GET now returns 404, but ListObjectVersions still lists older versions. What retrieval action can recover the previous content?

Disable bucket versioning and assume S3 instantly makes the most recently deleted key available to every client without addressing the delete marker.
Retrieve an authorized previous object version using its version ID, or remove the current delete marker after checking retention and restore policy.
Change the key prefix to a shorter name and expect S3 to ignore the current delete marker for all GET requests.
Run an S3 lifecycle rule that deletes every noncurrent version, assuming the deleted old content is automatically reconstructed from metadata.

Explanation

Correct Answer

In a versioned bucket, an ordinary delete typically inserts a delete marker as current. An authorized version-ID GET can retrieve surviving noncurrent data, or a carefully approved delete-marker removal can reveal an earlier version.

Incorrect Answers

Disabling versioning does not automatically remove the existing delete marker or restore the key’s previous current view. Inspect version history and required object preservation first.

Object key naming has no special ability to bypass versioned delete-marker semantics. The current version state, version ID and permissions control retrieval.

Expiring all noncurrent versions may destroy the only surviving object data. Follow version-aware restoration/retention controls instead of deleting recovery material.

Question 485

An operator restored a file from S3 Glacier Deep Archive into a temporary readable copy for two days. Four days later an ordinary GetObject fails again, while the archived object still exists. What happened?

A successful S3 Glacier restore permanently converts the original archived object to the S3 Standard storage class, so any later GetObject failure proves corruption.
The temporary restored copy expired after its requested lifetime; the original archived object remains but another supported restore or online copy is needed for immediate access.
The object became accessible only through an EBS volume because every S3 Glacier restore changes the object into EC2 block storage.
The S3 bucket must be deleted and recreated to retrieve an archived object after its temporary restored copy expires.

Explanation

Correct Answer

The archived object stays in its cold storage class. When the temporary restored copy expires, a standard read path can again require a new restore; choose a longer restore window or create a durable online copy if the workflow needs it.

Incorrect Answers

A restore creates a temporary readable copy for a specified retention period; it does not necessarily rewrite the archived object into a permanent online storage class.

S3 Glacier remains an object-storage facility. Archive restores do not move objects into an EC2 EBS device or change block-access protocols.

Bucket recreation is unrelated and destructive. Restore the still-preserved archive or move a separate copy into an appropriate immediate-access storage class.

Question 486

A new EFS access point enforces /team-b as its root directory, but that directory does not exist in the file system. The access point was created without root-directory creation owner UID, GID and permissions; NFS mount requests fail. Which corrective action fits?

Add an extra EFS mount target in the same AZ and assume new network paths create the missing access-point root directory automatically.
Raise EFS Elastic throughput until the missing /team-b directory appears as a side effect of increased filesystem capacity.
Create the directory safely with suitable ownership/permissions or configure the access point root-directory creation attributes so EFS can create the path during mount.
Enable S3 bucket versioning and assume S3 object snapshots create the missing EFS POSIX directory on demand.

Explanation

Correct Answer

AWS documents that EFS can automatically create a missing access-point root directory only when appropriate ownership and permissions attributes are supplied. Otherwise create it safely with correct POSIX controls.

Incorrect Answers

AZ mount targets provide transport, not missing POSIX directory state. A reachable mount target can still fail when an access point enforces a root path that does not exist.

Throughput settings affect file operation performance, not whether an EFS access point has valid creation metadata for its enforced root path.

S3 versioning protects S3 objects and is not an EFS NFS directory-creation mechanism. Repair the configured access-point root location.

Question 487

A service spends most CPU cycles compiling and processing records; memory capacity and storage I/O are below limits. Which EC2 family is the first candidate for benchmarking?

Memory-optimized R-family by default despite low memory use.
Compute-optimized C-family instances with suitable network and EBS capabilities.
Storage-optimized I-family solely for CPU execution.
Increase block storage IOPS while the profile already shows ample storage headroom, assuming faster storage makes the observed fully CPU-bound compilation code execute faster.

Explanation

Correct Answer

Compute-optimized instances allocate more compute resources relative to memory for CPU-bound work.

Incorrect Answers

More RAM may not address CPU saturation.

Local storage emphasis is not the stated bottleneck.

Higher EBS IOPS does not eliminate a measured CPU compute bottleneck when storage is underused. Benchmark a CPU-oriented EC2 family after confirming instruction set and thread requirements.

Question 488

An in-memory analytic engine retains hundreds of GiB of hot state and begins swapping on a general-purpose EC2 host. What instance family better matches its primary resource requirement?

Compute-optimized small-memory host with identical RAM shortage.
Burstable T-family as a way to guarantee hundreds of GiB of RAM.
Add many GiB of EBS swap to the existing small-memory EC2 instance and assume swap provides the same low-latency random access as hot in-memory analytical state.
Memory-optimized R-family or another supported RAM-heavy family sized to the working set.

Explanation

Correct Answer

The engine is memory-bound, so larger RAM capacity and bandwidth can reduce swapping.

Incorrect Answers

Extra cores without RAM do not hold the working set.

Bursty CPU pricing is not a high-memory design.

Swap uses much slower block storage and cannot replace sufficient RAM for hot-state workloads. Size a supported memory-optimized host for the real working set.

Question 489

A small web process uses CPU occasionally but idles most of the time. A burstable T-family instance is proposed. Which characteristic must be checked to avoid sustained-load surprises?

Look only at T-family instance vCPU count and assume the published vCPU number represents indefinitely available full-core CPU performance without credit constraints.
Assume unlimited CPU is always free for any sustained utilization level.
Treat a T-family instance as identical to compute-optimized dedicated CPU capacity.
CPU credit baseline, accrued/spent credits and whether Standard or Unlimited mode suits the observed utilization and pricing.

Explanation

Correct Answer

Bursty instances can deplete credits or charge surplus in Unlimited mode under sustained CPU demand.

Incorrect Answers

Burstable T instances have a baseline and credit mechanism; vCPU count alone does not establish sustainable throughput at high CPU utilization.

Unlimited may charge for usage above baseline.

Burstable baseline economics differ.

Question 490

An ALB-backed web tier sees variable traffic while CPU remains low because most work waits on downstream I/O. Which autoscaling metric can directly reflect request load per healthy target?

Target tracking on ALBRequestCountPerTarget with an appropriate request-per-target target value.
A fixed total ALB RequestCount as the only target tracking metric.
Set the ASG scale-out target to instance disk capacity remaining even though the observed pressure is HTTP requests waiting on downstream I/O.
Use only Route 53 DNS lookup counts for the app hostname and assume cached DNS responses exactly equal HTTP requests served by each healthy ALB target.

Explanation

Correct Answer

Per-target request demand responds to changes in fleet size and can track I/O-bound web traffic better than CPU.

Incorrect Answers

Total requests do not decrease per target when capacity doubles.

Available root filesystem GiB does not directly measure incoming ALB requests per serving target. Choose a scaling signal that correlates with actual work, such as ALB request count per target.

DNS resolvers cache lookups and may reuse an answer for many HTTP requests; DNS question counts do not directly represent load per ALB target.

Pass Your Amazon AWS Certified Solutions Architect - Associate SAA-C03 Exam Easy!

Question 480

Explanation

Correct Answer

Incorrect Answers

Question 481

Explanation

Correct Answer

Incorrect Answers

Question 482

Explanation

Correct Answer

Incorrect Answers

Question 483

Explanation

Correct Answer

Incorrect Answers

Question 484

Explanation

Correct Answer

Incorrect Answers

Question 485

Explanation

Correct Answer

Incorrect Answers

Question 486

Explanation

Correct Answer

Incorrect Answers

Question 487

Explanation

Correct Answer

Incorrect Answers

Question 488

Explanation

Correct Answer

Incorrect Answers

Question 489

Explanation

Correct Answer

Incorrect Answers

Question 490

Explanation

Correct Answer

Incorrect Answers

AWS Certified Solutions Architect - Associate SAA-C03 Practice Tests