Warm-ups (20)
Build fluency on easy problems before patterns.
Practice rooms
- Warm-up set A (strings and numbers)reverse-string · count-vowels · palindrome-check · capitalize-words · character-frequency · is-anagram · sum-of-digits · binary-to-decimal · fizzbuzz · factorial-iterative
- Warm-up set B (arrays)max-in-array · second-largest · find-duplicates · remove-falsy · array-intersection · rotate-array-by-k · merge-sorted-arrays · missing-number · flatten-one-level · fibonacci-iterative
Interview questions in this module
- Reverse a string without using
reverse(). - Check whether two strings are anagrams. What is the complexity?
- Find the missing number in an array of 1..n.