Interview Question

What’s the Central Limit Theorem, and how do you prove it? What are its applications?

Find all elements that appear more than n/k times in an array.

Write a program that does merge sort.

Write a function that takes an array, splits the array into every possible set of two arrays, and prints out the max differences between the two array’s minima in O(n) time.

Write a function that takes a sentence and prints out the same sentence with each word backwards in O(n) time.

Tell me your career background and objective. How to solve communication problems? Why you are applying for this role?

How would you measure the percentage of Qualcomm users traveling for work?

An email campaign was launched in two markets. When the conversion rate is pooled across the markets, the variation showed an improvement over the control. However, when looking at the individual market, the conversion rates flipped. Why?

What’s the difference between the T-test and Z-test?

If an alpha of a statistical test increases, what happens to the type 1 error rate?