Proofpoint Interview Questions

Note: ensure you read the disclaimer on the previous page reading the accuracy and sourcing of these problems.

Find Shortest Palindrome Possible

We have a string str like the following: js const str "bubble" Find a way to convert it to a palindrome by inserting characters in front of it. Recall that a palindrome is defined as "a word, phrase, or sequence that reads the same backward as forward". What's the shortes...

Difficulty: 5/10

Two Stack Queue

Building a Queue with Two Stacks: A Challenge in Engineering Elegance The Objective: Queue with Stacks In this challenge, your task is to implement a queue using two stacks. While many programming languages offer queues through arrays or lists, we're restricting our approach to only utilize ...

Difficulty: 6/10

Merge Intervals

This is a classic interview question that is used in _a lot_ in technical interviews, frequently in the form of a calendar or meeting management application. As such, we'll also assume the same use case, as it's easier to visualize. Suppose we're given a few arrays, like 1, 4 , 2, 5 , 7,...

Difficulty: 5/10

How Many Strongly Connected

Given a directed graph lessons simple reference to graphs represented via an adjacency list, write a class StronglyConnectedComponents with a count method that would return the number of strongly connected components in a graph. The definition of a strong connected component is a subgr...

Difficulty: 8/10

Sum of Perfect Squares

A perfect square is a number made by squaring a whole number. Some examples include 1 , 4 , 9 , or 16 , and so on because they are the squared results of 1 , 2 , 3 , 4 , etc. For example: 1 2 1 2 2 4 3 2 9 4 2 16 ... However, 15 is not a perfect square, bec...

Difficulty: 7/10

Text Justification

Can you justify input text represented by an array of words so it looks pretty when printed and the whitespaces are balanced? For example, in the above image, we have an input array of "wow", "so", "cool", "is", "algodaily!" . This is a list of words we need to properly arrange, with the ideal ...

Difficulty: 9/10

Delete Node From End

Removing the Nth Node From a Linked List's End: A Single Pass Approach Get ready to sail through a classic problem: Removing the n th node from the end of a linked list in a single pass. By the end of this lesson, you'll be able to wave goodbye to that pesky n th node and still maintain the lis...

Difficulty: 6/10

Build a Calculator

Let's build a very basic calculator by programming it! You've probably seen one that look similar to this: But we won't be building a physical calculator HardwareDaily will need to wait! instead, we'll be writing a simple program that can serve as one. Can you write a function that will evalua...

Difficulty: 7/10

Sum Digits Until One

We're provided a positive integer num . Can you write a method to repeatedly add all of its digits until the result has only one digit? Here's an example: if the input was 49 , we'd go through the following steps: start with 49 4 9 13 since the previous addition was 13, move ont...

Difficulty: 4/10

Introduction to Datastores

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Difficulty: 5/10

Special Methods and Concepts in Object Oriented Programming

Special Methods in Object Oriented Programming Now you know the bare bones of Object Oriented Programming. But, as I said in the previous lesson, there is still much more you have to discover. In today's lesson, we will go through a number of special functions that almost all OOP supported prog...

Difficulty: 5/10

Greedy Algorithms

**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

Interview Reports

Proofpoint Interview Questions and Answers Part 1 - wikitechy...

Wikitechy

Proofpoint Free interview preparation questions and answers Online Videos, Shortcuts,tips and Tricks for freshers and experienced

How competitive is the hiring process at Proofpoint? - Quora...

61 Proofpoint Interview Questions Answers...

Why did you leave your last job Regarding Proofpoint? What is your personal mission statement? Your coworker highlights your mistakes in front of everyone, how do you handle the situation? Did you con...

People at Proofpoint Say

This information was sourced from reviews originally posted on Glassdoor.

It WAS an amazing company. Great people! I thought upper management cared.

Easy to get in for intern position, but I'm not sure if that's the same for the full-time position though. Did not even have an whiteboard interview.