Coupa Interview Questions

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Max Rectangle in a Histogram

We're given a histogram like the following, where contiguous sharing a common border or touching bars are made up of different heights. Let's assume all bars have the same width. The histogram is converted to an array of the heights of the bars: js const histArr 3, 1, 4, 2, 2, 1 ...

Difficulty: 8/10

Grab a Random Node

Given a linked list, can you write a method to get a random node within it? Let's assume you're given a random node generator. The linked list will have at least 2 nodes, and may look something like this: 1 2 3 4 The odds of getting any number between 1 and 4 inclusive should b...

Difficulty: 4/10

Matrix Operations

Here's a fun one: let's say we have a 2D array matrix that is a size of m rows and n columns. It is initially prefilled with 0 s and looks like the following: js 0, 0, 0, 0 , 0, 0, 0, 0 , 0, 0, 0, 0 We are then given a list of increment operations to be performed on ...

Difficulty: 7/10

Two Sum

This is a classic and very common interview problem. Given an array of integers, return the indices of the two numbers in it that add up to a specific "goal" number. Suppose we had an array 1, 3, 6, 7, 9 , and let's say our "goal" number was 10 . Our numbers to sum to it could be 3 and 7 , an...

Difficulty: 4/10

Merge Sorted Linked Lists

Write an algorithm to merge two sorted linked lists and return it as a new sorted list. The new list should be constructed by joining the nodes of the input lists. You may assume the following node definition: js function Node val this.value val this.next null const...

Difficulty: 5/10

Delete Nodes From A Linked List

Now that we've implemented a linked list challenges implement a linked list , can you write a method that will delete all nodes of a given value? You're given the following standard structure as the definition of a linked list node: js class LinkedListNode constructor val ...

Difficulty: 4/10

How Out of Order

*This was submitted by user Hackleman.* Determine how "out of order" a list is by writing a function that returns the number of inversions in that list. Two elements of a list L , L i and L j , form an inversion if L i j . For example, the list 5, 4, 3, 2, 1 has 10 inversi...

Difficulty: 5/10

Implement a Stack With Minimum

Recall that a stack is an abstract data type modeling a collection of elements. Its primary operations are push which adds an element to the top of the stack and pop which removes the most newest element . Traditionally, a stack can easily be implemented in many dynamic languages using an a...

Difficulty: 6/10

Time and Space Complexity Analysis

**Unlock Your Full Potential with AlgoDaily!** We hope you're enjoying this course. At AlgoDaily, our aim is to transform complex coding challenges into engaging, bite sized lessons. And while our free lessons give you a glimpse of this transformative experience, there's so much more in store. ...

Difficulty: 5/10

Modifiers and Lookahead/Lookbehind

Difficulty: 5/10

Application Mastery

Difficulty: 5/10

Anomaly Detection In Machine Learning

**Anomaly Detection** **What is an Anomaly** An Anomaly https: www.collinsdictionary.com dictionary english anomaly defined as: *Something that is different from what is usual or expected.* Detecting anomalies has many useful applications. For example anomaly detection enables us to det...

Difficulty: 5/10

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People at Coupa Say

This information was sourced from reviews originally posted on Glassdoor.

Welcoming and inclusive culture, from top to bottom. CEO leads the company with passion, honesty and integrity.

The people are great. Whether from customer support, to finance, to PM, to upper management, everyone is fun, down-to-earth, and understanding. The Product and Development teams in particular cultivate a strong culture which carefully straddles the line between employee and customer happiness.