Drills

Below are a bunch of interactive exercises to help you practice fundamental concepts. If you are stuck on a particular topic, I may suggest working through one of these as a refresher. Otherwise, feel free to go through them at any time.

Arrays

• Count the number of zeroes in an array
• Print the elements of an array separated by commas
• Compute the mean of an array
• Create the reverse of an array
• Insert an element in the middle of an array
• Create an array with 3 elements in sorted order
• Find index of the minimum element in an array

Miscellaneous

• Count the number of vowels in a string
• Use a HashMap to keep track of the characters and their counts in a string