How can I estimate the time complexity of a program as a whole?

Are there any algorithms with wide spread application that an embedded systems engineer should know?

Is it any good if I focus only on machine learning and algorithms and not much on the analysis of data?

Can’t we just solve every problem with hashes? Why do we need any other data structure?

How difficult is it to become a machine learning engineer/researcher without a CS degree, and only a basic knowledge of algorithms and data structures?

How do websites like TripAdvisor and Expedia decide which places to show first in their dropdown menus?

What is the smallest/largest element in Java code?

Will algorithms find a way to make viral hack articles go extinct?

How do I linearly merge four arrays in C++?

Where are the pointers to kernel data structures kept?