How are the data structures and algorithms useful for SDET?

People often new to the software industry or those looking for career fields think that SDET is same as a Tester but that is incorrect. SDET is Software Development Engineer in Test a role which originated from Microsoft and is now in demand in almost all organizations.

A SDET is not limited to being involved in the development of the code; its responsibilities are vast and reach beyond. A Tester is given the job of testing the success of each code, often manually unlike SDET who is involved in designing, development, testing and automation tasks of the whole operation not just individual codes - a highly skilled professional.

Data structures and Algorithms are the foundations of any software development. They are the founding elements (along with others) of the whole operation. A SDET is more directly involved with these two because his responsibility is directly associated with it. We must know what data structures and algorithms are because at first they seem like those endless numbers going on in never-ending black screens often in movies with hackers in them. Well, yes that's partly correct, they do come across this because it the base of the whole thing.