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Share with me your thought process on implementing the two sum problem using a hash table in O(n) time complexity.

Give me a high-level overview of your background. What's your most relevant experience for Cognizant

Can you explain the contrast between the frequentist and Bayesian approaches to probability? Plus, what markers would you take into consideration when making a choice between these methods in a particular context?

Which kinds of problems are better suited for neural networks than support vector machines? What distinguishes neural networks and SVMs in their methodologies?

Tell me about a project you are very proud of? Why?

How does the convergence mechanism of SGD provide benefits over that of regular gradient descent?

Write a function that can identify the subarray of length k with the maximum sum from a given array of integers.

Describe a time when you failed to meet a deadline.

Tell me about a time when you helped mentor a new joiner.

Can you demonstrate how to create a normal distribution of 1000 data points with a mean of x and variance of y in R, perform a statistical summary, and plot the density? Follow this by executing the same in Python using the Codility platform.