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Cracking the Coding Interview: 189 Programming Questions and Solutions 6th Edition
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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
About the Author
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.
- ISBN-100984782869
- ISBN-13978-0984782857
- Edition6th
- Publication dateJuly 1, 2015
- LanguageEnglish
- Dimensions7 x 1.59 x 10 inches
- Print length687 pages
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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
- Best Sellers Rank: #2,739 in Books (See Top 100 in Books)
- #2 in Job Interviewing (Books)
- #2 in Software Development (Books)
- #5 in Job Hunting (Books)
- Customer Reviews:
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About the author

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).
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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.
I've always believed that there's no "crack" to coding interviews; it's just a matter of whether you can code or not (well, at least at those sane companies not filling up school buses with golf balls). And that requires practice. Lots of practice. Which is why I spent all my free time working out problems on Hackerrank. For me, this went well . . . for a while.
But there comes a point at which you get stuck. I remember working on some hackerrank problems in the medium to hard difficulty which I would not be able to proceed for weeks and weeks. No amount of googling for information, discussion boards or stack overflow threads paint a complete picture to help you when you're stuck.
After countless such occasions and failing a few interviews, I gave in and bought this book. After all it was $20 - the cost of an uber to work.
Now, I wish I had bought this sooner!
Within reading the first two chapters I've already learnt so much about how to think about coding problems. There's also a nice collections of custom data structures at the end of the book. I've swiped some data structures straight out of this book and use them in my day-to-day life too.
Gayle has done a tremendous job of using words to explain how that weird gooey gel inside your head moves like when problem-solving. She deconstructs every approach to tackle a problem into atomic pieces. She goes into great depth about alternative designs, tradeoffs and runtime complexity. She talks about visualizing recursive calls as trees, thinking about BUD*, amortized analysis of ArrayList and much more. The great thing is that Gayle goes into copious amounts of details for each solution - she talks about how to start from a brute force solutions and optimize each component one-by-one and talks about tradeoffs in approaches.
Overall, I think this a very helpful book. I would recommend you begin reading this book immediately after your first course on Algorithms. It will certainly help drill down the concepts and help strengthen your fundamentals.
*BUD is a special term the author uses to describe strategies to optimize solutions
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E dar ideias de projetos
Tcc
E falar dele na entrevista me fez ganhar uns potinhos a mais
Lovely little bookshop, sent me a thoughtful note, making me feel a special buyer. I can highly recommend. Will be ordering happily again.




















