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Can you walk me through how Principal Component Analysis functions?

What causes the curse of dimensionality in large datasets, and how might you mitigate it?

What are the main steps one should follow during an ETL process? How do you optimize this process?

Consider an array of sorted integers from 0 to n. Your task is to find the integer that introduces a problem. Write a function that accomplishes this task with a time complexity of O(log n).

Create a real-time data feed for stock prices.

When we talk about decision trees, how do we consider bias and variance? And, if you wouldn't mind, which do you think is more challenging: high bias or high variance, and give us an explanation for that assertion?

What are the key components and considerations in designing a low-latency audio/video streaming system?

How do you verify whether two strings can become identical with no more than a single character swap?

What would you say is the primary function of CNN, and where is it most relevant?

How can two sorted lists be joined to maintain sorted order in the resulting array?