# Check if a binary tree is balanced

This article looks at the interview question - *Check if a binary tree is balanced*.

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This article looks at the interview question - *Check if a binary tree is balanced*.

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This article looks at the interview question - *Find the median of two sorted arrays. For example an input of [1, 7, 8] and [2, 5, 6, 9] should result in the output 6*.

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This article looks at the interview question - *Find the kth last element in a linked list*.

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The AVL tree, named after its inventors Georgy Adelson-Velsky and Evgenii Landis, is a type of self-balancing binary search tree. The tree re-organises itself after every insert and delete so that the tree height is approximately \log n nodes high, allowing search in O(\log n) time. The re-organising does not guarantee a perfectly balanced tree, it is however good enough to guarantee O(\log n) search.

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Bucket sort, also known as bin sort, is a distribution sort that works by arranging elements into several ‘buckets’ which are then sorted using another sort, typically insertion sort, and merged into a sorted list.

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The backtick (also known as the grave accent or backquote) is used to start a code section in Markdown, because of this it’s a little tricky to include it without triggering the code formatting in a page. This snippet demonstrates the various ways of displaying a backtick.

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The splay tree is a type of self-adjusting binary search tree like the red-black tree. What makes the splay tree special is its ability to access recently accessed elements faster. Whenever an operation is performed, the tree performs an operation called *splaying* which pulls the element to the top of the tree.

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Putting yourself out there and answering questions on Stack Overflow is a great way to grow as a software developer. Not only does it let you practice more at what you’re good at, it also let’s you dip your toes into areas where you’re less familiar or learning. There is a lot to providing great answers on Stack Overflow, here are some tips to help out.