Sr. Software Engineer, EC2 VPC at Amazon Web Services, Inc.

4 questions, about 3 minutes. This is a diagnostic, not a certification — it estimates your skill readiness, it does not guarantee you are qualified for or will be hired into this role.

1. Which AWS service is primarily used for scalable object storage?

EC2 S3 IAM Route 53

2. What is the primary purpose of network segmentation?

To limit the blast radius of a breach by isolating parts of the network To increase internet speed To reduce the number of IP addresses needed To simplify DNS configuration

3. What does `df.groupby('region')['sales'].sum()` return?

The total sales across the whole dataframe Total sales summed for each distinct region A count of rows per region An error, because groupby requires two columns

4. Which library is most commonly used for tabular data manipulation in Python?

pandas flask requests pytest

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