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Cracking the Coding Interview: 189 Programming Questions and Solutions (Cracking the Interview & Career) 6th Edition

4.7 4.7 out of 5 stars 8,980 ratings
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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

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Previous page
  1. ISBN-10
    0984782869
  2. ISBN-13
    978-0984782857
  3. Edition
    6th
  4. Publication date
    July 1, 2015
  5. Part of series
    Cracking the Interview & Career
  6. Language
    English
  7. Dimensions
    7 x 1.59 x 10 inches
  8. Print length
    687 pages
  9. See all details
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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 ‏ : ‎ 2.9 pounds
  • Dimensions ‏ : ‎ 7 x 1.59 x 10 inches
  • Customer Reviews:
    4.7 4.7 out of 5 stars 8,980 ratings

About the author

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Gayle Laakmann McDowell

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

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Top reviews from the United States

Bradley Broughman
5.0 out of 5 stars Best overall
Reviewed in the United States on May 2, 2024
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Indispensable information.
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Jerome M.
5.0 out of 5 stars Quick and great quality.
Reviewed in the United States on March 29, 2024
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Llegó antes de lo esperado. Excelentes condiciones y excelente servicio. Buen producto, aún lo estoy leyendo.
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swe.sam
5.0 out of 5 stars great book for learning algorithm and data structure
Reviewed in the United States on March 15, 2024
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I love it!
One person found this helpful
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ewu
4.0 out of 5 stars I bought 2 editions because the 6th edition has more problems and is better organized.
Reviewed in the United States on November 1, 2017
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The main reason I bought the book is that it closely reflects the status quo of the technical interviews in large tech companies. You probably can do 1000 problems on leetcode in several months and achieve better results. But this book can be done in maybe half of the time and yet does a decent sampling of the typical problems.

I have both the 5th edition and the 6th edition. I bought 2 editions because the 6th edition has more problems and is better organized.

Four stars instead of five for two reasons.

First is about what the book is promoting. The current interview process is far from being perfect. For many of the problems, unless you know the solutions beforehand, there is no way you can code up a decent one within an hour. Some of the problems were even research subjects for years before an optimal solution was found. The book mentions an example, a good candidate whom the author knows very well but just cannot pass the coding interviews. As the author explains, large tech companies can afford false negatives. How to fix the problem? Read the book back and forth and do the problems several times. Then a candidate will greatly increase the chance of landing a good job. But the question is: Will anyone who aces on interview problems necessarily perform well on the job? Will this person necessarily be a good engineer? I do not know. There are definitely false positives too. I am guessing the assumption is that the coding problems we do nowadays on the interviews somehow achieve minimal number of false positives. But I doubt there are actually numbers supporting that claim.

The second reason for a star less is the lack of rigorousness. Some of the problems are presented unclear. I have to go to the solution part to figure out what a problem actually means. Some of the solutions are not straightforward. For example, there is a problem calls for topological sort. However, none of the solutions given uses breadth-first search. Why? Some of the solutions have wrong analysis. For example, the subtree checking problem. One solution reduces the problem to checking for substrings. The Java method is String.indexOf(). The author claims the time complexity is O(m+n), which I believe for Java is actually O(mn).

Overall this is good book for preparing for coding interviews. A bit disappointed about what has become of the technical interviews nowadays.
19 people found this helpful
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Lucy
5.0 out of 5 stars Great book
Reviewed in the United States on February 24, 2024
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Helpful book and great seller.
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Laurie
5.0 out of 5 stars Great Book!
Reviewed in the United States on February 22, 2024
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A Great Book with great info.
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Rocketman
5.0 out of 5 stars 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.
82 people found this helpful
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Luka Moilinga
5.0 out of 5 stars Coding interview
Reviewed in Canada on September 30, 2023
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It cover most of the coding questions. Good for preparing for programming job interview
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Jan
5.0 out of 5 stars Excelente recopilación de lo más importante en una entrevista TI
Reviewed in Mexico on August 11, 2023
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Aplique para un empleo en amazon. Este libro documenta cómo es el proceso de evaluación y que no hay que saber todo pero, hay que tener un buen proceso mental.
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Gabriel
5.0 out of 5 stars Ótimo livro
Reviewed in Brazil on November 29, 2023
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Perfeito para estudar
E dar ideias de projetos
Tcc
E falar dele na entrevista me fez ganhar uns potinhos a mais
One person found this helpful
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Beatriz
5.0 out of 5 stars Cracking the Code Interview
Reviewed in Spain on May 5, 2024
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Really good explanation on how to approach interview questions.
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Mischa
5.0 out of 5 stars Lovely little bookshop, highly recommend!
Reviewed in the United Kingdom on January 1, 2024
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In pristine condition with prompt delivery. Great book, thoroughly enjoyable if you like tech, that is.
Lovely little bookshop, sent me a thoughtful note, making me feel a special buyer. I can highly recommend. Will be ordering happily again.
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