Multi-AZ and multi-region design, Auto Scaling, ELB types, decoupling with SQS and SNS, disaster recovery strategies and Route 53 routing.
40 cards · basic cards · AI-written, checked twice. Edit anything.
- What is the primary benefit of Multi-AZ deployment in AWS?
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High availability within a single region through redundancy across multiple data centers- Define RTO in the context of disaster recovery
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Recovery Time Objective - the maximum time a system can be down before causing unacceptable business impact- Define RPO in the context of disaster recovery
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Recovery Point Objective - the maximum acceptable amount of data loss measured in time- When should you use Multi-AZ instead of Multi-Region?
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For high availability needs within a single geographic area where lower latency and lower cost are priorities- How are databases replicated across AWS regions?
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Through asynchronous replication using read replicas or managed services like RDS cross-region replication- What is the key difference between Multi-AZ and Multi-Region failover?
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Multi-AZ fails over automatically within the same region; Multi-Region requires manual intervention or application-level routing- What latency concern exists with Multi-Region deployment?
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Increased latency between regions due to geographic distance- How does Multi-Region deployment affect cost?
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Increases costs due to data transfer between regions, duplicate infrastructure, and replication charges- What are the three capacity parameters of an Auto Scaling Group?
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Minimum capacity, maximum capacity, and desired capacity- Name the main types of Auto Scaling policies
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Target tracking, step scaling, and simple scaling- How does target tracking scaling work?
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Automatically adjusts capacity to maintain a specific metric value, such as 70% CPU utilization- What is step scaling in Auto Scaling?
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Scales based on multiple threshold steps, allowing different scaling actions for different metric ranges- What is scheduled scaling used for?
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Automatically adjusting capacity at specific times or dates, such as business hours vs. after-hours- What does the cooldown period do in Auto Scaling?
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Prevents rapid scaling up and down by enforcing a waiting period between scaling activities- What is the difference between a launch template and a launch configuration?
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Launch template is versioned and reusable across services; launch configuration is immutable and ASG-specific
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