Toast Interview Guide

Showing 4 questions

Ranking

A question's ranking corresponds to how commonly it's asked by Toast. The higher the ranking, the more likely you'll encounter it in a Toast interview.

Question

Frequency

Difficulty

Find the Celebrity

In a group of people, find the "celebrity": someone who is known by everyone else, but doesn't know anyone themselves. You are given a way to query whether two people know each other.

ArraysTwo PointersGreedy Algorithms

Very likely

If you have a Toast interview, it's very likely that you will get this question

Medium

#1. Find the Celebrity

Medium

In a group of people, find the "celebrity": someone who is known by everyone else, but doesn't know anyone themselves. You are given a way to query whether two people know each other.

ArraysTwo PointersGreedy Algorithms

This question is very likely to be asked in your Toast interview

Valid Palindrome

Determine if a given string is a palindrome, considering only alphanumeric characters and ignoring cases. Essentially, check if the string reads the same forwards and backward after removing non-alphanumeric characters and converting to lowercase.

StringsTwo Pointers

Somewhat likely

If you have a Toast interview, you might get this question

Easy

#2. Valid Palindrome

Easy

StringsTwo Pointers

This question is somewhat likely to be asked in your Toast interview

Best Time to Buy and Sell Stock

You're given daily stock prices. Find the maximum profit you can make by buying and selling the stock once. You must buy before you sell.

ArraysDynamic Programming

Not likely

If you have a Toast interview, it's unlikely that you will get this question. Toast does ask it, but it's rare

Easy

#3. Best Time to Buy and Sell Stock

Easy

You're given daily stock prices. Find the maximum profit you can make by buying and selling the stock once. You must buy before you sell.

ArraysDynamic Programming

This question is not likely to be asked in your Toast interview

Best Time to Buy and Sell Stock II

Maximize your profit by buying and selling a stock multiple times. You're given an array representing stock prices, and can make as many transactions as you want.

ArraysGreedy Algorithms

Not likely

If you have a Toast interview, it's unlikely that you will get this question. Toast does ask it, but it's rare

Medium

#4. Best Time to Buy and Sell Stock II

Medium

Maximize your profit by buying and selling a stock multiple times. You're given an array representing stock prices, and can make as many transactions as you want.

ArraysGreedy Algorithms

This question is not likely to be asked in your Toast interview