AWS Certified Solutions Architect - Associate SAA-C03 Practice Test 66
Question 650
A Windows departmental fileshare serves mostly large sequential video archives with limited random I/O. Engineers selected the most expensive SSD and maximum throughput capacity without any benchmark. What should be evaluated?
- Always choose maximum SSD throughput because file workload size is the only relevant performance signal.
- Benchmark supported FSx for Windows storage media and throughput capacity against measured access rates and latency requirements.
- Reduce the Active Directory account's password length to increase SMB disk throughput.
- Replace SMB shares with S3 object URLs without changing legacy Windows applications.
Explanation
Correct Answer
B:FSx for Windows offers selectable storage/performance configurations whose economics should reflect the actual SMB workload.
Incorrect Answers
A:A large namespace does not imply every share needs maximum low-latency throughput.
C:Identity credential policy does not determine filesystem I/O performance.
D:An unmodified SMB client cannot use S3 object APIs as a drop-in shared-folder protocol.
Question 651
Two Linux container services share an Amazon EFS file system. One service writes invoices under /invoices, and the other processes customer uploads under /uploads. Both require NFS access, but the security team wants each service mounted into its own application directory with an enforced POSIX identity rather than relying on user IDs supplied by containers. Which EFS design is the closest fit?
- Use two Route 53 private hosted-zone records for the same EFS mount target; DNS names by themselves specify the NFS root path and force the POSIX user ID on every request.
- Create separate S3 access points on an S3 bucket and present them to both containers as ordinary EFS NFS mount targets, preserving all POSIX file semantics.
- Create distinct EFS access points with paths /invoices and /uploads and the required POSIX UID/GID settings; apply suitable EFS file-system and IAM access controls for each application.
- Enable EBS Multi-Attach for the EFS mount-target storage volumes, because the attached block device supplies per-service EFS root-directory and identity enforcement.
Explanation
Correct Answer
C:EFS access points can enforce the root directory seen by a client and override the NFS user and group IDs for requests. Configure distinct access points with appropriate POSIX permissions, IAM authorization and mount settings; the path controls are not a substitute for file-system permissions.
Incorrect Answers
A:Route 53 provides name resolution and does not set server-enforced POSIX identities or replace an EFS access-point root-directory path. Both services would still need an appropriate access-control design.
B:S3 access points are S3 object API access abstractions, not Amazon EFS NFS access points. They do not automatically provide POSIX UID/GID enforcement on shared NFS mounts.
D:EBS Multi-Attach provides supported shared block-device attachment and requires appropriate cluster-aware file-system coordination. It does not configure EFS access-point roots or enforce per-application POSIX identity.
Question 652
A GPU training platform holds hundreds of terabytes of images in S3 but needs fast parallel filesystem reads for training epochs. It will export selected processed outputs back to S3. What storage arrangement fits?
- Run training directly from S3 Glacier Deep Archive without restoring data or staging a filesystem.
- Use FSx for Windows SMB shares solely because the clients run CUDA on Linux.
- Copy every object to one EC2 instance's tiny root filesystem and NFS-export it to all GPUs.
- Use a suitably configured FSx for Lustre filesystem linked with the relevant S3 dataset import/export workflows.
Explanation
Correct Answer
D:FSx for Lustre offers high-throughput parallel file access while its S3 integration supports feeding compute from durable object datasets.
Incorrect Answers
A:Archival retrieval is not a low-latency training filesystem interface.
B:A Windows SMB file server does not automatically meet Lustre's parallel HPC I/O pattern.
C:A small single-instance file server adds a performance bottleneck and single point of failure.
Question 653
A batch simulation has disposable scratch inputs, while a separate research experiment requires an always-available long-lived Lustre dataset. An engineer proposes the same cheapest storage/deployment setting for both. Which choice is sound?
- Size and choose FSx for Lustre filesystem deployment/storage settings according to temporary scratch versus persistent data and required throughput.
- Treat every temporary scratch filesystem as permanently retained archival storage.
- Treat persistent scientific data as disposable scratch with no other authoritative copy.
- Use EC2 security group rules as the only setting that determines Lustre storage durability and throughput.
Explanation
Correct Answer
A:Scratch and durable datasets have different retention, metadata and availability priorities, so a single unexamined configuration can be uneconomical or unsafe.
Incorrect Answers
B:That can pay for durability/capacity without business benefit when the data is regenerable.
C:Loss of a scratch resource could destroy the only copy of long-lived results.
D:Network authorization is necessary but does not select Lustre deployment type or storage performance.
Question 654
A Windows application relies on Active Directory file ACLs and SMB UNC paths. A proposal selects FSx for Lustre because its throughput is impressive on Linux HPC benchmarks. What should the architect explain?
- Assume all FSx product variants expose the same native SMB endpoint and Windows ACL controls.
- FSx for Lustre is not a drop-in Windows SMB/NTFS share; choose a service matching the application's file protocol and ACL semantics.
- Increase Lustre throughput until the legacy application's UNC path automatically becomes valid.
- Change Windows DNS search suffixes and omit any SMB-compatible server.
Explanation
Correct Answer
B:Parallel Lustre workloads and managed SMB Windows shares solve different application contracts even if both store files.
Incorrect Answers
A:FSx is a family of distinct filesystem implementations, not a single interchangeable protocol.
C:Throughput capacity does not implement Windows SMB path semantics.
D:DNS naming cannot turn an unsupported filesystem protocol into an SMB share.
Question 655
A media-processing platform performs millions of concurrent S3 GETs against independent objects. Initial testing used only one narrow request pattern, and request concurrency is uneven. What throughput practice can help?
- Send all requests serially through one tiny EC2 host and assume S3 can override the client's single-request limit.
- Compress every S3 key name to a single character and assume this alone guarantees unlimited throughput.
- Distribute independent object requests appropriately across key prefixes and clients and measure aggregate request rates.
- Use S3 Glacier Deep Archive for hot objects so frequent GETs never require retrieval preparation.
Explanation
Correct Answer
C:S3 scales request processing with concurrent prefixes and request patterns; workload distribution matters alongside network capacity.
Incorrect Answers
A:A single constrained caller can bottleneck even when S3 can accept more parallel work.
B:Object key length is not a magic substitute for parallel access and rate measurement.
D:Archival storage imposes different retrieval behavior and is unsuitable for hot low-latency request paths.
Question 656
A scientific client repeatedly downloads one very large S3 object and has enough network bandwidth for multiple parallel HTTP reads. A single GET stream cannot saturate the client connection. What optimization can it use?
- Make many HEAD requests because metadata-only calls return different chunks of object content.
- Use S3 Select as a transparent byte-for-byte parallelization mechanism for any arbitrary binary file.
- Increase S3 object expiration frequency until TCP streams become automatically parallel.
- Issue concurrent byte-range GET requests over independent object ranges and reassemble them in order.
Explanation
Correct Answer
D:Byte-range requests allow parallel download segments from a large S3 object when the client supports correct range handling.
Incorrect Answers
A:HEAD does not return object payload bytes and cannot parallelize the file download.
B:Query-oriented content extraction is not a universal replacement for ranged object retrieval.
C:Lifecycle expiry affects data retention, not parallel read transfers.
Question 657
A backup exporter creates extremely large S3 multipart uploads using hundreds of thousands of tiny parts. Its client begins failing because the multipart part-count limit is exceeded. What should the uploader adjust?
- Choose part sizes that keep the entire upload within the supported maximum number of parts, and respect minimum nonfinal part sizes.
- Retry the same oversized part sequence forever without changing the number of parts.
- Switch to many S3 object-tagging requests and treat tags as replacement object payload parts.
- Use the bucket's versioning flag to raise the maximum supported multipart part count.
Explanation
Correct Answer
A:Multipart uploads have service-side part-count and size limits, so total object size dictates an adequate part size.
Incorrect Answers
B:The deterministic part-count limit will continue rejecting an invalid upload configuration.
C:Tags are metadata and do not combine into a multipart object body.
D:Versioning tracks object histories, not the multipart protocol's limits.
Question 658
A mobile video editor in South America regularly uploads large footage to one S3 bucket in an AWS Region far away. Direct paths exhibit erratic international latency. Which optional feature should be tested?
- Create an S3 gateway VPC endpoint on users' cellular networks outside any VPC.
- Benchmark S3 Transfer Acceleration against normal regional uploads for that bucket and client geography.
- Use EBS Multi-Attach as the internet upload endpoint for public mobile clients.
- Move the footage to Glacier Deep Archive before the first upload finishes.
Explanation
Correct Answer
B:Transfer Acceleration uses the AWS edge network to potentially improve long-distance S3 transfers, but benefits vary by path.
Incorrect Answers
A:Gateway endpoints apply to route tables inside VPCs, not public mobile device networks.
C:EBS is EC2 block storage, not a public S3 compatible ingest edge.
D:Archive storage transitions do not fix the initial long-distance network route.
Question 659
A company enabled S3 Transfer Acceleration for a nearby-office upload client, then saw no measurable latency improvement but higher transfer charges. What should govern whether the feature remains enabled?
- Assume every client location receives the same guaranteed performance uplift from acceleration.
- Replace Transfer Acceleration with an S3 Multi-Region Access Point without measuring whether cross-Region routing helps the nearby client.
- Compare measured end-to-end transfer performance and incremental acceleration charges against regular regional S3 access.
- Move the bucket to a more distant AWS Region and assume a new endpoint always offsets additional transfer latency and relocation costs.
Explanation
Correct Answer
C:Acceleration is an optional charged path; where the ordinary route is already efficient, paying the premium may have no benefit.
Incorrect Answers
A:Global edge routing benefits depend on network geography and congestion.
B:A Multi-Region Access Point optimizes routing to eligible regional buckets and incurs its own data-routing costs. It is not a substitute for benchmarking whether this nearby-office upload benefits from a particular acceleration path.
D:Region placement affects network paths, transfer pricing and compliance. Moving storage without comparing actual client-to-Region latency or ongoing charges offers no evidence of improvement for a nearby uploader.
Question 660
A team enables S3 Transfer Acceleration on its EU-region bucket and claims that data is automatically durably replicated to every AWS Region. Which explanation is correct?
- Accelerated object uploads always create simultaneous replicas in every AWS Region with no replication configuration.
- An accelerated bucket URL becomes a multi-writer globally consistent database.
- Turning on acceleration automatically changes all object encryption keys to global multi-Region KMS keys.
- Transfer Acceleration speeds supported transfers to the bucket's existing Region; cross-Region replication is a separate data-placement control.
Explanation
Correct Answer
D:An accelerated endpoint is a transport optimization, not a global replica of the object's authoritative storage.
Incorrect Answers
A:The feature does not provision all-Region S3 copies or replace explicit replication rules.
B:The service remains S3 object storage with its configured bucket Region and replication behavior.
C:Transport acceleration and KMS key configuration are separate settings.
