The Molecule Report

A easy Python interview practice problem on DataDriven. Write and execute real python code with instant grading.

Domain

Python

Difficulty

easy

Seniority

L4

Problem

A genomics pipeline hands you raw sequencing reads as strings over the bases A, C, G, and T, and some reads come back contaminated with stray characters. For each read return a dict reporting whether it is clean (only those four bases), its GC content as a percentage of the read's length, how many times each of the four bases occurs, and the most common pair of consecutive bases. A read shorter than two bases has no such pair.

Summary

Four letters. A lot of math hidden in the sequence.

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