Need some basic questions to solve

I’m taking a Java course called “Ace the Placements.” And I’ve already begun working on the function and 1D array portions. I was wondering where I could find practice questions. All I can see is a collection of lecture videos, followed by a section called “challenge” that, as the name implies, has difficult questions. I want to practice the fundamental functions questions first then, 1D array, then 2D array. So that I can determine whether or not I comprehended the topic properly. I’ll get to the difficult portion after that. As it won’t help me much to watch videos and code along with the mentor line by line; instead, I need to practice some questions so that I can truly understand the topic.