Mixed Deck — All AWS Topics Flashcards

Which capability does Amazon SQS Extended Client Library provide?

Answer: Allows SQS messages larger than 256 KB by storing the payload in S3 and sending a reference

The SQS Extended Client Library stores large message payloads (up to 2 GB) in S3 and places an S3 object reference in the SQS message, bypassing the 256 KB limit.

How does risk management apply to daily practice in Welding Metallurgy & Heat Treatment for American Welding Society professionals?

Answer: Through proactive identification of potential hazards and implementation of preventive measures

Effective risk management in Welding Metallurgy & Heat Treatment requires proactive hazard identification and preventive measures, not just reactive responses. This approach reduces incidents, improves outcomes, and protects both professionals and clients.

An application needs IPv6 connectivity for EC2 instances in a private subnet to communicate outbound to IPv6 internet resources. Which gateway should be used?

Answer: Egress-Only Internet Gateway

An Egress-Only Internet Gateway allows IPv6 traffic from instances to the internet but prevents the internet from initiating IPv6 connections to those instances.

Which AWS service would you use to send automated email and SMS notifications triggered by AWS events?

Answer: Amazon SNS

Amazon SNS (Simple Notification Service) is a pub/sub messaging service that can fan out notifications via email, SMS, HTTP, and other protocols.

Which AWS service enables you to build real-time, bidirectional communication applications using WebSockets via API Gateway?

Answer: API Gateway WebSocket APIs

API Gateway WebSocket APIs enable you to build real-time two-way communication applications, such as chat apps and dashboards, without managing infrastructure.

In Amazon API Gateway, what does a 'stage' represent?

Answer: A named snapshot of a deployment used to separate environments such as dev, test, and prod

An API Gateway stage is a named reference to a deployment, enabling separate configurations and URLs for different environments like development and production.

Which hazardous gas is produced when welding in areas contaminated with chlorinated solvent vapors (e.g., from degreasing agents)?

Answer: Phosgene (COCl₂)

UV radiation from the arc reacts with chlorinated hydrocarbons to form phosgene, an extremely toxic gas that can cause fatal pulmonary edema.

Which defect appears as a gap at the weld root?

Answer: Incomplete penetration

Incomplete penetration, also known as lack of penetration, occurs when the weld metal fails to extend through the full thickness of the joint. This results in a gap or unfused area at the root of the weld, significantly reducing the strength and integrity of the joint. It is a critical defect that can lead to premature failure under stress.

Which standard of practice is MOST important for ensuring quality in Joint Design & Preparation?

Answer: Following evidence-based protocols while adapting to specific circumstances

Evidence-based protocols provide a foundation of proven practices, but effective American Welding Society professionals must also adapt their approach based on specific circumstances and individual case needs within Joint Design & Preparation.

In a CI/CD pipeline, what does the 'CD' stand for?

Answer: Continuous Deployment

In a CI/CD pipeline, the 'CD' typically stands for Continuous Deployment, or sometimes Continuous Delivery. Continuous Deployment automates the release of every code change that successfully passes all automated tests directly to production. This ensures that new features and bug fixes are delivered to end-users as quickly and efficiently as possible without manual intervention.

Which deployment configuration in Elastic Beanstalk replaces all instances simultaneously but first launches a fresh set with the new version before terminating old ones?

Answer: Immutable deployment

Immutable deployments launch a new Auto Scaling group with the new version, then decommission the old group only after health checks pass.

On a multi-view orthographic drawing, the right-side view is projected from which view?

Answer: Front view

In standard third-angle projection (used in the US), the right-side view is projected from the right side of the front view.

A team wants to detect when IAM policies are modified in their AWS account. Which service should they configure to alert on these changes?

Answer: AWS CloudTrail with Amazon EventBridge rules

CloudTrail logs all IAM API calls, and EventBridge rules can trigger alerts or automated responses when specific IAM modification events are detected.

A Lambda function needs to process messages from an SQS queue but should stop retrying a message after 3 failed attempts. What should you configure?

Answer: Configure a Dead Letter Queue (DLQ) on the SQS event source mapping with maxReceiveCount=3

Setting maxReceiveCount on the SQS event source mapping's redrive policy sends messages to a DLQ after the specified number of failed processing attempts.

A DevOps team stores Ansible playbooks in CodeCommit and wants to auto-trigger playbook runs on every commit. What is the most straightforward AWS-native approach?

Answer: Configure a CodePipeline with a CodeBuild action that runs ansible-playbook

CodePipeline with a CodeBuild action is the native CI/CD approach: CodeCommit triggers the pipeline, and the CodeBuild stage executes the ansible-playbook command.

An operations team needs to run commands on a fleet of EC2 instances without SSH access. Which service should they use?

Answer: AWS Systems Manager Run Command

AWS Systems Manager Run Command allows you to remotely execute commands on EC2 instances without opening inbound ports or managing SSH keys.

A Lambda function reads from DynamoDB Streams. The function is failing and the stream iterator keeps replaying the same batch. What is the most likely cause?

Answer: The Lambda function is throwing an unhandled exception, causing the batch to retry

When a Lambda function throws an unhandled exception processing a DynamoDB Stream batch, the batch is retried until it succeeds or the retention period expires.

What is the purpose of post-flow (post-purge) in GTAW?

Answer: Continue shielding gas flow after arc extinguishment to protect the hot tungsten and weld pool from oxidation

Post-flow continues argon shielding for several seconds after the arc stops, protecting the still-hot tungsten electrode and solidifying weld metal from atmospheric oxygen and nitrogen contamination.

Which AWS service provides a fully managed, petabyte-scale data transport solution that uses secure, rugged devices to physically move data to AWS when network bandwidth is insufficient?

Answer: AWS Snowball Edge

AWS Snowball Edge is a physical device used to transfer petabyte-scale data when network transfer is impractical due to bandwidth or time constraints.

After welding, a welder notices the workpiece has distorted significantly. Which practice would have been most effective in minimizing distortion?

Answer: Tacking and sequencing welds to balance heat input

Properly tacking the assembly and using a balanced weld sequence minimizes net distortion by distributing heat input symmetrically.