Compute and Storage Services Flashcards
7 cards from real AWS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Compute and Storage Services flashcards as text
Which AWS compute service enables running HPC workloads with tightly coupled, low-latency networking using Elastic Fabric Adapter (EFA)?
Answer: Amazon EC2 with EFA-supported instance types
Elastic Fabric Adapter (EFA) is a network interface for EC2 instances that provides low-latency, high-bandwidth communication required by HPC and ML training workloads.
What is the difference between an EC2 instance store and an EBS volume?
Answer: EBS provides persistent storage; instance store is ephemeral and lost when the instance stops or terminates
EBS volumes are durable network-attached storage that persists independently, while instance store volumes are physically attached to the host and lost when the instance stops or terminates.
A team needs to copy S3 objects from a bucket in us-east-1 to a bucket in eu-west-1 automatically whenever new objects are added. Which feature handles this?
Answer: S3 Cross-Region Replication (CRR)
S3 Cross-Region Replication (CRR) automatically replicates new objects from a source bucket to a destination bucket in a different AWS Region.
Which EC2 Auto Scaling policy type adds or removes a fixed number of instances based on a CloudWatch alarm threshold?
Answer: Step Scaling
Step Scaling adjusts capacity by a defined number of instances in steps based on the magnitude of a CloudWatch alarm breach.
An application requires block storage with 64,000 IOPS and sub-millisecond latency for a critical Oracle database. Which EBS volume type should be used?
Answer: io2 Block Express
io2 Block Express supports up to 256,000 IOPS and sub-millisecond latency, making it ideal for latency-sensitive, high-performance databases.
What AWS feature enables an EC2 instance to assume an IAM role and access other AWS services without embedding credentials in the application code?
Answer: IAM Instance Profile
An IAM Instance Profile attaches an IAM role to an EC2 instance, allowing the instance to automatically obtain temporary credentials via the metadata service.
Which S3 feature protects against accidental deletion by keeping multiple versions of an object, including all writes and deletes?
Answer: S3 Versioning
S3 Versioning retains all versions of every object, allowing recovery from accidental deletions or overwrites by restoring a previous version.