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Gayle Laakmann McDowell

Cracking the Coding Interview: 189 Programming Questions and Solutions 6th Edition

by Gayle Laakmann McDowell (Author)

8,280 ratings

Part of: Cracking the Interview & Career (3 books)

in Job Interviewing

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I am not a recruiter. I am a software engineer. And as such, I know what it's like to be asked to whip up brilliant algorithms on the spot and then write flawless code on a whiteboard. I've been through this as a candidate and as an interviewer.

Cracking the Coding Interview, 6th Edition is here to help you through this process, teaching you what you need to know and enabling you to perform at your very best. I've coached and interviewed hundreds of software engineers. The result is this book.

Learn how to uncover the hints and hidden details in a question, discover how to break down a problem into manageable chunks, develop techniques to unstick yourself when stuck, learn (or re-learn) core computer science concepts, and practice on 189 interview questions and solutions.

These interview questions are real; they are not pulled out of computer science textbooks. They reflect what's truly being asked at the top companies, so that you can be as prepared as possible. WHAT'S INSIDE?

189 programming interview questions, ranging from the basics to the trickiest algorithm problems.
A walk-through of how to derive each solution, so that you can learn how to get there yourself.
Hints on how to solve each of the 189 questions, just like what you would get in a real interview.
Five proven strategies to tackle algorithm questions, so that you can solve questions you haven't seen.
Extensive coverage of essential topics, such as big O time, data structures, and core algorithms.
A behind the scenes look at how top companies like Google and Facebook hire developers.
Techniques to prepare for and ace the soft side of the interview: behavioral questions.
For interviewers and companies: details on what makes a good interview question and hiring process.

Illustrations noteIllustrations: Illustrations, black and white

ISBN-10

0984782869
ISBN-13

978-0984782857
Edition

6th
Publication date

July 1, 2015
Part of series

Cracking the Interview & Career
Language

English
Dimensions

7 x 1.59 x 10 inches
Print length

687 pages
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Editorial Reviews

About the Author

Gayle Laakmann McDowell is the founder and CEO of CareerCup and the author of Cracking the PM Interview and Cracking the Tech Career.

Her background is in software development. She has worked as a software engineer at Google, Microsoft, and Apple. At Google, she interviewed hundreds of software engineers and evaluated thousands of hiring packets on the hiring committee. She holds a B.S.E. and M.S.E. in computer science from the University of Pennsylvania and an MBA from the Wharton School.

She now consults with tech companies to improve their hiring process and with startups to prepare them for acquisition interviews.

Product details

ASIN ‏ : ‎ 0984782850
Publisher ‏ : ‎ CareerCup; 6th edition (July 1, 2015)
Language ‏ : ‎ English
Paperback ‏ : ‎ 687 pages
ISBN-10 ‏ : ‎ 0984782869
ISBN-13 ‏ : ‎ 978-0984782857
Item Weight ‏ : ‎ 2.69 pounds
Dimensions ‏ : ‎ 7 x 1.59 x 10 inches

Best Sellers Rank: #1,901 in Books (See Top 100 in Books)
- #1 in Job Interviewing (Books)
- #1 in Software Development (Books)
- #3 in Job Hunting (Books)

Customer Reviews:
8,280 ratings

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Gayle Laakmann McDowell

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Gayle Laakmann McDowell is an author, consultant, and founder focusing on improving tech hiring for both the interviewer and the candidate.

Gayle has worked as an engineer for Google, Microsoft, and Apple. Most recently, at Google, she served on the hiring committee where she interviewed hundreds of candidates and evaluated thousands more. It was here that she discovered the disconnect between candidates, their skill set, and their interview performance.

Though her company, CareerCup, Gayle has worked with many of the top tech companies to reform their hiring practices and implement interviewer training programs.

She is the author and creator the best-selling Cracking the Interview & Career series: Cracking the Coding Interview, Cracking the PM Interview (co-authored with Jackie Bavaro), Cracking the PM Career (co-authored with Jackie Bavaro), and Cracking the Tech Career

Gayle holds a bachelor's and master's in Computer Science from the University of Pennsylvania and an MBA from the Wharton School of Business.

She currently consults, writes, and codes from her home in Palo Alto, California. She can be found online at gayle.com, twitter (@gayle), and facebook (@gayle).

Customer reviews

4.7 out of 5

8,280 global ratings

5 star		81%
4 star		12%
3 star		4%
2 star		1%
1 star		2%

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Samuel

Great resource, could be better as an ebook

Reviewed in the United States 🇺🇸 on November 3, 2022

Verified Purchase

The questions and solutions are really helpful. However the only downside is the size of the book. It's very chunky and flipping between the book and laptop/keyboard is cumbersome. It would've been great if an ebook option was available on Amazon.

9 people found this helpful

Helpful

Vivian E.

Inadequate

Reviewed in the United States 🇺🇸 on March 18, 2023

Verified Purchase

The book came this way. Fast delivery but product came in inadequate form :(

Helpful

jaydev

Excellent reference source of information

Reviewed in the United States 🇺🇸 on January 16, 2023

Verified Purchase

Not a a book I would read cover-to-cover, but an excellent reference material.

2 people found this helpful

Helpful

This book helped me get job offers from Google and Amazon

Reviewed in the United States 🇺🇸 on April 14, 2016

Verified Purchase

I’ve been meaning to review this book for a while. Last year I got laid off from my startup and found myself feeling anxious as I haven’t had to look for a job for several years. I bought this book along with two others, but this was the only one I really spent time on. The first third of this book provides specific information about companies along with example problems. The last two thirds are problem solutions with explanations. I found everything valuable. I didn’t write out complete solutions for most of her example problems. If I thought it was obvious I skipped it, but whatever you do don’t skip reading the solution. It’s here where you can read about ways of solving the problem that didn’t occur to you. For example, if you want to know if two binary trees are identical you can verify this by comparing their preorder and inorder traversals. The only gaps were discrete math and heaps. Heaps appeared frequently in sample questions on Glassdoor. I pulled an old data structures book out to re-read about heaps, but I was never explicitly asked about them during my job search though I did mention them a couple times as possible ways to maintain a priority queue.

Information about the companies was very relevant as I live in the Bay Area. I wish I had heeded her admonition about discrete math for Google because I was unprepared for these questions. I would have read the math if it was in the book, but since I haven’t used that math ever in a job I skipped it. During the interview I was able to solve the math problems except I needed basic definitions and one or two hints. For Amazon it was good to know there’s a “bar raiser” because it was obvious when I met the interviewer who wrote out a really hard problem right off the bat and wanted a linear time algorithm. I was speechless for five minutes, but managed to reduce the problem enough where the solution suddenly came to me. I think I would have been unnerved by the question if I didn’t know about this type of interviewer that she writes about. I wish she also covered Twitter and LinkedIn.

The book doesn’t talk enough about applying for jobs. I do wish she wrote about job offer contingencies as my first job offer was from a startup who told me it expires in 24 hours. This in turn caused other recruiters to panic. While in the end I got a good job, all in all I hope I’m not forced to do this again anytime soon. I’m just glad I had this book at my side. It was indispensable.

59 people found this helpful

Helpful

Amazon Customer

Best of the worst?

Reviewed in the United States 🇺🇸 on December 11, 2020

Verified Purchase

If you are a starting or seasoned developer going through gut-wrenching process of preparing for the current tech interview process this is probably one of the best resources in terms of letting you know that your experience or inexperience doesn't matter as long as you can solve the problems in this book. The author amusingly states that the interviewers are trying to see how you approach problems that 'you've never seen before' and then shows you 189 of the most common ones. It is significantly likely that although your coding interview with a FAANG-like company may not have of these problems exactly it will be some flavor of one or more of them. You will also likely have to solve them under time constraints that will likely not allow you to think through them as if you had never seen them before while the interviewer is waiting for your answer so repetitive practice is key. Know that your competition for these interviews could be spending hundreds of hours practicing the types of problems in this book while you may be doing useful work so you may have to take significant time out of your schedule to practice to be competitive. What that says about those who have successfully or unsuccessfully navigated the tech interview process is unclear. I suppose the idea is for technology companies to have a consistent interview process although a consistently bad interview process may miss more candidates than an inconsistently good one. But this is the system we are currently stuck with so I guess that you should play along until the tech companies evolve and a better technical interview process comes along.

18 people found this helpful

Helpful

A Customer

Decent book if you want offline learning to get into the valley.

Reviewed in the United States 🇺🇸 on March 25, 2021

Verified Purchase

First, I have no idea why Silicon Valley is obsessed with these interviews. Is it just that they couldn't figure anything else out? These questions are a terrible indicator of how good of a programmer you are. My software company, outside the valley, has interviews that actually relate to the job, and we get confused candidates because they've practiced all these algorithm and data structure problems and little else. Anyway, it's what we have and that's what the book is geared towards. It's a decent book. I like to have an "offline" thing to supplement my online training, and this fills that void. Unfortunately, it's not without its flaws. It needs a bit of a math review of the commutative property and logs, otherwise understanding that chapter is going to be difficult. It has an occasional "easily proved" or "easily disproved" type of verbiage which is never backed up. (This is something I see in far too many books.) The biggest flaw of the book is you can't ask clarifying questions about a problem, which you will most definitely need to do at an interview. That's more of a flaw of the format rather than the author. I'm not going to go into details of each of the problems, because I don't want to give anything away, but I remember doing the first problem and wondering why in the world they were suggesting doing a quicksort or other n log n algorithm on a string which is at most 26 characters.

11 people found this helpful

Helpful

Adrineh

Great resource

Reviewed in the United States 🇺🇸 on December 26, 2022

Verified Purchase

The media could not be loaded.

Great source for anyone who is preparing for coding interview. One of my professors recommended it and I got it. It is a great book

4 people found this helpful

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Top reviews from other countries

PHoben

Well written not aimed at junior developers

Reviewed in the United Kingdom 🇬🇧 on November 10, 2019

Verified Purchase

I’ve rated this as a four star as the book seems to be well written. I only got so far before I gave up.
The reason for this is : I graduated and was looking for developer jobs and thought this book would be great!
Perhaps it is great for someone with a few years experience that’s looking for a senior developer role.
As a junior this was out with my skill set or knowledge l.
The book is well written don’t get me wrong and you will learn a lot from it but I think it would require sitting down and making this a study book.
No doubt I will go back to this in a few years when I have a far greater knowledge and can understand this

12 people found this helpful

Elena

Good book, depending on your experience. Some pages missing though

Reviewed in the United Kingdom 🇬🇧 on March 7, 2021

Verified Purchase

Pages from 107 to 118 missing, so no graphs and bit manipulation topics for me 🙂
Other than that, some useful advices and approaches how to solve problems. But definitely it should not be seen as a single thing you need to do for interview preparation. It’s a good book but not a magic pill, and nothing is 🙂 Of course if you’ve already solved couple of hundreds problems on leetcode you’ll be bored.

10 people found this helpful

Shane

Thorough and very well written

Reviewed in the United Kingdom 🇬🇧 on June 27, 2022

Verified Purchase

This book is very well written and has a lot of content (I’m still going through it). I’ve been developing software for over 20 years, but still found it useful, so would recommend to all levels of experience. Only slight issue is that it’s large, and heavy, and the binding seemed a little sub-optimal - that there are too many pages for a paperback book - and that soon pages may fall out.

3 people found this helpful

Akash Raj Singh

The best Book if you are a Software Person

Reviewed in India 🇮🇳 on May 29, 2018

Verified Purchase

Looking for a change in Job?
Want to crack all the codes thrown towards you?
Not good at the advanced techniques of coding?
Then, This book is for you.

P.S.: This is not for Beginners. You should be familiar with the basics first

75 people found this helpful

Zen

Great for students or those looking for a job

Reviewed in the United Kingdom 🇬🇧 on October 14, 2017

Verified Purchase

This book is great for computer science students or for anyone in a similar situation looking for a graduate job.
I've used it to help me in securing jobs for my placement module as part of my degree (penultimate year) .
It covers everything you would need to learn to prepare you for a serious interview with a large organisation such Google, Microsoft, IBM and Oracle etc...
I've read it all and seen most of the examples come up in real interviews. Its very useful, I recommend reading it if you are serious in securing a role within a large software based organisation.
Not only does it help with interviews but it will help you within university itself, considering you are a student. It covers various algorithms that most students will cover within university.

tdlr; helps you secure a job and helps you study for uni.

8 people found this helpful

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