AWS Cloud test (Intermediate)

Sample questions

5 sample questions from the AWS Cloud test, with the answers. Samples are taken out of the live test, so you will not meet these when you sit it.

1. Which of the following best describes the appropriate use cases for the S3 Standard storage class compared to S3 Glacier?

   1. S3 Standard storage class is optimal for data with high durability requirements, while S3 Glacier is better suited for data with low durability requirements.
   2. S3 Standard storage class is optimal for frequently accessed data, while S3 Glacier is better suited for long-term archival storage with infrequent access.
   3. S3 Standard storage class is optimal for infrequently accessed data, while S3 Glacier is better suited for frequently accessed data.
   4. S3 Standard storage class is optimal for data with low durability requirements, while S3 Glacier is better suited for data with high durability requirements.

   Answer: B. S3 Standard storage class is optimal for frequently accessed data, while S3 Glacier is better suited for long-term archival storage with infrequent access.

   S3 Standard is designed for data that is accessed frequently and requires low latency, making it suitable for applications like websites and mobile apps. S3 Glacier, on the other hand, is intended for data that is rarely accessed and can tolerate retrieval times of several minutes, making it more cost-effective for long-term archival storage.

2. Which of the following is a correct statement regarding VPC route table entries for instances in a public subnet?

   1. A route table entry pointing to a NAT gateway is required for instances in a public subnet to access the internet.
   2. A route table entry pointing to a VPC endpoint is required for instances in a public subnet to access the internet.
   3. Route tables do not require any entries for instances in a public subnet to access the internet.
   4. A route table entry pointing to an internet gateway is required for instances in a public subnet to access the internet.

   Answer: D. A route table entry pointing to an internet gateway is required for instances in a public subnet to access the internet.

   In a VPC, instances in a public subnet require a route table entry that points to an internet gateway (IGW) in order to route traffic to the internet. Without this entry, the instances cannot access external resources. Other options may be misleading or incorrect: for example, a NAT gateway is used for private subnets, and route tables do not require entries for all subnets, only those that need internet access.

3. Which of the following statements best describes AWS Cloud?

   1. AWS Cloud is a software development framework that only supports Python-based applications.
   2. AWS Cloud is a company that provides physical servers for on-premises data centers.
   3. AWS Cloud is a comprehensive and broadly adopted cloud platform, offering a wide range of services including computing, storage, networking, and more.
   4. AWS Cloud is a single service that only provides virtual machines for hosting applications.

   Answer: C. AWS Cloud is a comprehensive and broadly adopted cloud platform, offering a wide range of services including computing, storage, networking, and more.

   The statement accurately reflects the nature of AWS Cloud as a comprehensive cloud platform. The other options either describe specific services within AWS Cloud or are not accurate descriptions of AWS Cloud itself.

4. In a project where multiple AWS Lambda functions require the same set of libraries and configurations, what is the primary purpose of using Lambda layers?

   1. Lambda layers are used to store execution logs and metrics for Lambda functions.
   2. Lambda layers are used to deploy Lambda functions directly to the cloud.
   3. Lambda layers are used to define the runtime environment for Lambda functions.
   4. Lambda layers are used to manage and share code and dependencies across multiple Lambda functions.

   Answer: D. Lambda layers are used to manage and share code and dependencies across multiple Lambda functions.

   Lambda layers allow developers to package and reuse common code and dependencies across multiple Lambda functions, making it easier to manage and maintain large-scale applications. This is especially useful in scenarios where multiple Lambda functions require the same libraries or configurations, as it avoids code duplication and simplifies updates.

5. Which EC2 instance type is best suited for workloads that require occasional bursts of compute power but do not need consistent CPU capacity?

   1. i3.large
   2. r5.2xlarge
   3. c5.4xlarge
   4. t3.micro

   Answer: D. t3.micro

   The t3.micro instance type is a burstable performance instance designed for workloads that don't require consistent CPU capacity but need occasional bursts of compute power. It is commonly used for small applications and development environments due to its cost-effectiveness and sufficient performance for light workloads.