Questions and Answers
Which factor is primarily concerned with maintaining operations during hardware or software failures?
Which type of load balancer operates at the OSI Application Layer 7?
Which of the following is NOT an optional EC2 Auto Scaling configuration?
What is the primary purpose of using CloudWatch metrics in load balancing?
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Which EC2 Auto Scaling configuration is required to determine the scaling group's capacity limits?
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What is the main role of CloudTrail logs in load balancer monitoring?
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What is the primary goal of the AWS Well-Architected Framework's Operational Excellence pillar?
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Which method directly impacts the ability to perform instant crash recovery in a primary database?
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What is meant by the term 'Mean Time to Repair (MTTR)'?
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Which statement accurately conveys a strategy under the Cost Optimization pillar of the AWS Well-Architected Framework?
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What key principle must be followed to improve reliability in AWS Well-Architected Framework?
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What is indicated by the term 'Mean Time Between Failures (MTBF)'?
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What does a CIDR block size of /16 allow in terms of address allocation?
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What role do Network ACLs play in a VPC configuration?
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Which characteristic describes security groups in a VPC?
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What is the function of the presentation layer in the OSI model?
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Which of the following is NOT a reserved IP address?
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In Route 53 routing, what distinguishes weighted routing from simple routing?
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Which of the following factors should be considered when choosing a region in AWS?
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What is a core principle of AWS's pricing philosophy?
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Which of the following AWS services is charged when launched by autoscaling?
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Which of the following statements about AWS support plans is correct?
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What is primarily the responsibility of the customer under the Shared Responsibility Model?
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Which component is involved in the AWS Trusted Advisor service?
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What is the primary role of AWS CloudFront in a CDN service?
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What are some of the services available at no charge in AWS?
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Which EC2 pricing model is most suitable for applications with flexible start and end times that can sustain interruptions?
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Which tool should an AWS user employ to create and manage encryption keys?
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In the context of AWS, what does TCO stand for, and what does it encompass?
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What is a key feature of Amazon RDS Read Replicas?
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Which of the following correctly describes the function of Route 53?
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What type of storage does Amazon S3 Glacier provide?
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Which of the following is a characteristic of Elastic File System (EFS)?
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What challenges are associated with using traditional relational databases?
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In which use case would Amazon DynamoDB be most advantageous?
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Which AWS service is specifically used for container orchestration?
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What is a limitation of using the Standard-Infrequent Access storage class in S3?
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Which step is NOT required when launching EC2 instances?
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Study Notes
Web Services and Cloud Adoption
- Web service formats include XML and JSON.
- AWS Cloud Adoption Framework consists of Business (focus on people and governance) and Technical areas (platform, security, operations).
AWS Economics and Billing
- Fundamental AWS costs involve compute (charged by hour/second), storage (per GB), and data transfer (outbound charged per GB).
- AWS pricing philosophy promotes the concept of paying for usage, incentivizing volume usage and reservations.
- Services offered at no charge include Amazon VPC, Elastic Beanstalk, Auto Scaling, AWS CloudFormation, and AWS IAM, while EC2 launched by Auto Scaling incurs charges.
- Total Cost of Ownership (TCO) includes server, storage, network, and IT labor costs.
AWS Support Options
- Technical Account Manager (TAM) provides proactive guidance, available only through the Enterprise Support plan.
- AWS Support Concierge assists with billing and account-related inquiries.
- AWS Trusted Advisor offers warnings and highlights issues needing correction.
- Support plans range from Basic (no case support) to Enterprise (critical issues, 15-minute response time).
AWS Global Infrastructure
- Choosing AWS regions is influenced by data governance, latency, service availability, and costs.
- Points of presence include edge locations (for reduced latency) and regional edge caches (for infrequent content access).
- AWS services:
- RDS for scalable databases.
- Aurora supports MySQL and PostgreSQL with high performance.
- DynamoDB is a NoSQL database with low-latency performance.
- CloudFront for global content delivery with low latency.
Shared Responsibility Model
- Security responsibilities differ between customer (data, platform, IAM, etc.) and AWS (hardware, software infrastructure).
- AWS account access requires specific credentials, such as access key IDs and IAM usernames.
- Steps to secure a new AWS account include creating IAM users, enabling MFA, and utilizing CloudTrail for monitoring.
Networking and Content Delivery
- IP address types differentiate between IPv4 (32 bits) and IPv6 (128 bits).
- Virtual Private Cloud (VPC) creates isolated networks unique to the user.
- Security groups operate on instance levels and are stateful, while Network ACLs function at the subnet level and are stateless.
- AWS Route 53 offers various routing policies, including simple and latency-based routing.
Compute Services
- Categories of AWS compute services include Infrastructure as a Service (EC2), serverless (Lambda), and container computing (ECS, EKS).
- EC2 pricing models include on-demand, spot, reserved, and dedicated.
- Important EC2 launch decisions include selecting an AMI, instance type, and network settings.
Storage Solutions
- Types of EBS Volumes include Solid State Drives (SSD) and Hard Disk Drives (HDD).
- S3 provides object storage suitable for scalability and performance.
- EBS is block storage designed for high performance with EC2 instances, while EFS offers scalable file storage solutions.
- S3 Glacier is used for long-term data archiving, with various retrieval options available depending on immediacy required.
Database Management
- Relational databases face challenges such as server maintenance and scaling limits.
- RDS is suited for complex queries and high durability, enabling read replicas to distribute read queries.
- DynamoDB offers unlimited storage and scalable throughput, while Redshift handles complex analytic queries with standard SQL support.
Cloud Architecture Principles
- AWS Well-Architected Framework emphasizes operational excellence, security, reliability, performance efficiency, and cost optimization.
- Trusted Advisor monitors adherence to these principles and suggests optimizations.
- Important calculations for system reliability include Mean Time to Failure (MTTF) and Mean Time to Repair (MTTR).
Autoscaling and Monitoring Tools
- Different types of load balancers include Application Load Balancer, Network Load Balancer, and Classic Load Balancer, each serving different traffic protocols.
- Monitoring tools for load balancers include CloudWatch metrics and CloudTrail logs for API interaction insights.
- Configuring EC2 Auto Scaling involves decisions about AMIs, instance types, security groups, and specific scaling policies (scheduled, dynamic, or predictive).
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Description
This quiz covers key concepts related to CloudFront and traffic management strategies. Topics include latency routing, geolocation, failover mechanisms, and the role of CloudFront as a CDN service. Test your understanding of these critical networking principles.