Cracking the Coding Interview, 4 Edition - 150 Programming Interview Questions and Solutions

Recommendations

Info

Solutions to Chapter 7 | Object Oriented Design 41 } 42 } Overview: 1. We grouped the edges by their type. Because inners go with outers, and vice versa, this enables us to go straight to the potential matches. We keep track of the inner perimeter of the puzzle (exposed_edges) as we work our way inwards. exposed_edges is initialized to be the corner’s edges. CareerCup.com 1 6 0
Solutions to Chapter 7 | Object Oriented Design 7.7 Explain how you would design a chat server. In particular, provide details about the various backend components, classes, and methods. What would be the hardest problems to solve? SOLUTION What is our chat server? pg 62 This is something you should discuss with your interviewer, but let’s make a couple of assumptions: imagine we’re designing a basic chat server that needs to support a small number of users. People have a contact list, they see who is online vs offline, and they can send text-based messages to them. We will not worry about supporting group chat, voice chat, etc. We will also assume that contact lists are mutual: I can only talk to you if you can talk to me. Let’s keep it simple. What specific actions does it need to support? »» User A signs online »» User A asks for their contact list, with each person’s current status. »» Friends of User A now see User A as online »» User A adds User B to contact list »» User A sends text-based message to User B »» User A changes status message and/or status type »» User A removes User B »» User A signs offline What can we learn about these requirements? We must have a concept of users, add request status, online status, and messages. What are the core components? We’ll need a database to store items and an “always online” application as the server. We might recommend using XML for the communication between the chat server and the clients, as it’s easy for a person and a machine to read. What are the key objects and methods? We have listed the key objects and methods below. Note that we have hidden many of the details, such as how to actually push the data out to a client. 1 enum StatusType { 2 online, offline, away; 3 } 4 1 6 1 Cracking the Coding Interview | Concepts and Algorithms
Page 1 and 2:
CRACKING THE FOURTH EDITION C O D I
Page 3 and 4:
Table of Contents Chapter 7 | Objec
Page 5 and 6:
Introduction Something’s Wrong We
Page 7 and 8:
Behind the Scenes For many candidat
Page 9 and 10:
Behind the Scenes | The Amazon Inte
Page 11 and 12:
Behind the Scenes | The Apple Inter
Page 13 and 14:
Interview War Stories The View from
Page 15 and 16:
Interview War Stories | Pop Divas P
Page 17 and 18:
Interview War Stories | You Can (Ma
Page 19 and 20:
Interview War Stories | Spider Sens
Page 21 and 22:
Before the Interview | Resume Advic
Page 23 and 24:
Before the Interview | Behavioral P
Page 25 and 26:
Before the Interview | Technical Pr
Page 27 and 28:
The Interview and Beyond
Page 29 and 30:
At the Interview | Handling Behavio
Page 31 and 32:
At the Interview | Handling Technic
Page 33 and 34:
At the Interview | Five Algorithm A
Page 35 and 36:
At the Interview | Five Algorithm A
Page 37 and 38:
At the Interview | The Offer and Be
Page 39 and 40:
At the Interview | Top Ten Mistakes
Page 41 and 42:
At the Interview | Frequently Asked
Page 43 and 44:
Interview Questions
Page 45 and 46:
Chapter 1 | Arrays and Strings Hash
Page 47 and 48:
Chapter 2 | Linked Lists How to App
Page 49 and 50:
Chapter 3 | Stacks and Queues How t
Page 51 and 52:
Chapter 4 | Trees and Graphs How to
Page 53 and 54:
Part 2 Concepts and Algorithms
Page 55 and 56:
Chapter 5 | Bit Manipulation 5.1 Yo
Page 57 and 58:
Chapter 6 | Brain Teasers 6.1 Add a
Page 59 and 60:
Chapter 7 | Object Oriented Design
Page 61 and 62:
Chapter 8 | Recursion 8.1 Write a m
Page 63 and 64:
Chapter 9 | Sorting and Searching 9
Page 65 and 66:
Chapter 10 | Mathematical 10.1 You
Page 67 and 68:
Chapter 11 | Testing 11.1 Find the
Page 69 and 70:
Chapter 12 | System Design and Memo
Page 71 and 72:
Chapter 13 | C++ How To Approach: A
Page 73 and 74:
Chapter 14 | Java How to Approach:
Page 75 and 76:
Chapter 15 | Databases How to Appro
Page 77 and 78:
Chapter 16 | Low Level How to Appro
Page 79 and 80:
Chapter 17 | Networking How to Appr
Page 81 and 82:
Chapter 18 | Threads and Locks How
Page 83 and 84:
Part 4 Additional Review Problems
Page 85 and 86:
Chapter 19 | Moderate _____________
Page 87 and 88:
Chapter 20 | Hard Input: DAMP, LIKE
Page 89 and 90:
Solutions
Page 91 and 92:
Solutions to Chapter 1 | Arrays and
Page 93 and 94:
Page 95 and 96:
Page 97 and 98:
Page 99 and 100:
Solutions to Chapter 2 | Linked Lis
Page 101 and 102: Solutions to Chapter 2 | Linked Lis
Page 103 and 104: Solutions to Chapter 2 | Linked Lis
Page 105 and 106: Solutions to Chapter 3 | Stacks and
Page 117 and 118: Solutions to Chapter 4 | Trees and
Page 127 and 128: Solutions to Chapter 5 | Bit Manipu
Page 137 and 138: Solutions to Chapter 6 | Brain Teas
Page 143 and 144: Solutions to Chapter 7 | Object Ori
Page 151: Solutions to Chapter 7 | Object Ori
Page 161 and 162: Solutions to Chapter 8 | Recursion
Page 171 and 172: Solutions to Chapter 9 | Sorting an
Page 179 and 180: Solutions to Chapter 10 | Mathemati
Page 189 and 190: Solutions to Chapter 11 | System De
Page 201 and 202: Solutions to Chapter 12 | Testing 1
Page 203 and 204:
Solutions to Chapter 12 | Testing 1
Page 205 and 206:
Solutions to Chapter 12 | Testing 1
Page 207 and 208:
Solutions to Chapter 13 | C++ 13.2
Page 209 and 210:
Page 211 and 212:
Page 213 and 214:
Solutions to Chapter 13 | C++ Then
Page 215 and 216:
Page 217 and 218:
Solutions to Chapter 14 | Java 14.2
Page 219 and 220:
Page 221 and 222:
Page 223 and 224:
Solutions to Chapter 15 | Databases
Page 225 and 226:
Page 227 and 228:
Page 229 and 230:
Solutions to Chapter 16 | Low Level
Page 231 and 232:
Page 233 and 234:
Page 235 and 236:
Page 237 and 238:
Page 239 and 240:
Page 241 and 242:
Solutions to Chapter 17 | Networkin
Page 243 and 244:
Page 245 and 246:
Page 247 and 248:
Page 249 and 250:
Solutions to Chapter 18 | Threads a
Page 251 and 252:
Page 253 and 254:
Page 255 and 256:
Page 257 and 258:
Solutions to Chapter 19 | Moderate
Page 259 and 260:
Page 261 and 262:
Page 263 and 264:
Page 265 and 266:
Page 267 and 268:
Page 269 and 270:
Page 271 and 272:
Solutions to Chapter 20 | Hard 2. O
Page 273 and 274:
Solutions to Chapter 20 | Hard 20.3
Page 275 and 276:
Solutions to Chapter 20 | Hard 10 1
Page 277 and 278:
Page 279 and 280:
Page 281 and 282:
Page 283 and 284:
Solutions to Chapter 20 | Hard 28 i
Page 285 and 286:
Solutions to Chapter 20 | Hard 23 }
Page 287 and 288:
Solutions to Chapter 20 | Hard Val_
Page 289 and 290:
Page 291 and 292:
Index A arithmetic 108, 131, 143, 1
Page 293:
Mock Interviews Mock Interviews Stu
show all

Cracking the Coding Interview, 4 Edition - 150 Programming Interview Questions and Solutions

Create successful ePaper yourself

Delete template?

Save as template?