Many machine learning algorithms are complicated and not easy to understand, even though they have rendered impressive level of accuracy. As humans, we must be able to fully understand how decisions are being made so that we can trust the decisions of AI systems. We need ML models to function…
You receive a data science interview opportunity from your dream company. You have surveyed many the-top-50-question type of articles but still feel uncertain. Since there are already many similar articles, why do I dare to add an article to this crowded topic? In this article I re-write many ordinary answers…
Identity and access management (IAM) is a critical step in all cloud systems such as Google Cloud Platform (GCP), AWS, or Azure of Microsoft. It regulates WHO (identity) CAN DO WHAT (access) ON WHICH RESOURCES (management). When you open a Google or AWS or Azure account, you will need to…
Histogram-based Outlier Score (HBOS)
It is easy to get the count statistic of a variable. The extreme points in a histogram are called the outliers for that variable. In multivariate data, a data point can be an outlier in one variable, but not an outlier in another variable. If a…
All AWS cloud services rely on data transmission from and to AWS networks and other private networks. This section you will learn everything about cloud networking:
The question…
The word “automation” may let people to think that you can hand off totally to AWS. “Automation for repetitive tasks” is probably more closer to the idea. As you use AWS more and more, you will find you repeat a set of routine procedures. These tasks can be scripted or…
People may concern if their data are safe on cloud. AWS had designed multiple layers to secure data and services at the highest level. Security is achieved by controlling who can access (authorize) to what services (authenticate). …
You will need databases to organize and retrieve your customer information or product information. How do you build your own databases in the cloud? In this post you’ll learn relational databases as well as non-relational databases. Then you will understand the strength and weakness relational and non-relational databases.
The Elastic Compute Cloud (EC2) and the S3 (Simple Storage Services) are two of AWS’ early pioneer services in 2000s and have been the backbone for many other services. Elastic Compute Cloud (EC2) is a virtual machine called (an instance) that can run all kinds of applications. …
The question weights of the exam are: (1) Cloud Concepts (26%), (2) Billing and Pricing (16%), (3) Security and Compliance (25%), and (4) Technology (33%). So I organize the study guide into eight posts according to these topics. I also include some questions in each section. …
