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NEW QUESTION # 275
A company runs a non-production application on an Amazon EC2 instance. The application logs all error messages to a log file on the local file system. All entries that are written to the log file start with the word "error." A CloudOps engineer must implement a solution that gives the company the ability to search for all occurrences of the error during the previous year.
Which solution will meet this requirement?
Answer: D
Explanation:
The CloudWatch agent can collect the application's local log file and send the entries to CloudWatch Logs, where they can be retained and searched over the required time period. A metric filter can identify log events containing the word "error," enabling the company to locate and analyze those occurrences efficiently.
NEW QUESTION # 276
A company uses hundreds of Amazon EC2 On-Demand Instances and Spot Instances to run production and non-production workloads. The company installs and configures the AWS Systems Manager Agent (SSM Agent) on the EC2 instances.
During a recent instance patch operation, some instances were not patched because the instances were either busy or down. The company needs to generate a report that lists the current patch version of all instances.
Which solution will meet these requirements in the MOST operationally efficient way?
Answer: D
Explanation:
Comprehensive Explanation (250-350 words):
AWS Systems Manager Inventory is designed to collect metadata from managed instances, including installed software, applications, and patch information. It works asynchronously and does not require instances to be actively running a command at the time of collection, which is critical when instances may be busy or temporarily unavailable during patch windows.
Inventory data is stored centrally and can be queried to generate reports showing the current patch level or installed patch versions across all managed instances. This makes it well-suited for large fleets that include both On-Demand and Spot Instances and that may scale dynamically.
Option B relies on Run Command, which requires instances to be online and available at execution time. This does not meet the requirement because some instances were already missed during patch operations due to being busy or down. Option C and Option D use AWS Config, which is primarily intended for configuration compliance and drift detection, not detailed patch version reporting. Creating custom or managed rules for patch status introduces unnecessary complexity and overhead compared to Inventory's built-in capability.
Therefore, Systems Manager Inventory provides the most operationally efficient and reliable solution for collecting and reporting patch version data across all EC2 instances.
NEW QUESTION # 277
A company is running an application on premises and wants to use AWS for data backup. All of the data must be available locally. The backup application can write only to block-based storage that is compatible with the Portable Operating System Interface (POSIX).
Which backup solution will meet these requirements?
Answer: D
Explanation:
The Storage Gateway service enables hybrid cloud backup by presenting local block storage that synchronizes with AWS cloud storage. For scenarios where all data must remain available locally while still backed up to AWS, the correct mode is gateway-stored volumes.
"Use stored volumes if you want to keep all your data locally while asynchronously backing up point-in-time snapshots to Amazon S3 for durable storage." These volumes expose an iSCSI interface compatible with POSIX file systems, allowing direct use by on-premises backup software.
Gateway-cached volumes (Option C) store primary data in AWS with limited local cache, violating the "all data must be available locally" requirement. Options A and B are object-based storage solutions, not compatible with POSIX or block-based backup applications.
Therefore, Option D fully satisfies CloudOps reliability and continuity best practices by ensuring local availability, cloud durability, and POSIX compatibility for backups.
NEW QUESTION # 278
A company runs a critical application by using Amazon DynamoDB. During a recent deployment, the application accidentally wrote incorrect data to a DynamoDB table. The table has point-in-time recovery (PITR) enabled with continuous backups. DynamoDB Streams is enabled on the table. The company's recovery point objective (RPO) is 2 minutes.
A CloudOps engineer must restore the table to its state from 2 minutes before the corruption occurred.
Which solution will meet these requirements?
Answer: B
Explanation:
DynamoDB point-in-time recovery continuously backs up table data and can restore the table to a selected second within the recovery window. AWS documentation states that a PITR restore restores the data to a new table, not in place on the existing table. Therefore, the correct process is to restore the table to the timestamp two minutes before the corruption and then update the application to use the newly restored table. Option A is wrong because PITR does not update the existing table in place. Option C uses an on-demand snapshot, which might not meet the 2-minute RPO. Option D is unsafe because DynamoDB Streams are not a managed reverse-transaction rollback mechanism. PITR to a new table is the reliable recovery method.
NEW QUESTION # 279
A company moves workloads from public subnets to private subnets to improve security. During testing, servers in the private subnets cannot reach an external API. The VPC has a CIDR block of 10.0.0.0/16, two public subnets, two private subnets, one internet gateway, and a NAT gateway in each private subnet.
The company must ensure that workloads in the private subnets can reach the external API.
Which solution will meet this requirement?
Answer: A
Explanation:
For IPv4 traffic, private subnets require a NAT gateway in a public subnet to access the internet. NAT gateways must be deployed in public subnets and associated with an Elastic IP address. Private subnet route tables must direct 0.0.0.0/0 traffic to the NAT gateway.
The question states that NAT gateways are incorrectly placed in private subnets, which cannot provide internet access. Deploying NAT gateways in public subnets resolves this issue and restores outbound connectivity to external APIs.
Option A applies only to IPv6. Option B adds unnecessary complexity. Option D is not applicable because external APIs are not AWS services.
NEW QUESTION # 280
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