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Coding Interview Questions


# Problem Code Type Topic Companies Average Time Score
1 Kth Row of Pascal's Triangle code Arrays
28:32 225
2 Rotate Matrix code Arrays 60:26 300
3 Max Sum Contiguous Subarray code Arrays 33:39 225
4 Find Duplicate in Array code Arrays 40:13 450
5 Merge Intervals code Arrays
78:57 225
6 Repeat and Missing Number Array code Arrays 63:55 350
7 Merge Overlapping Intervals code Arrays 48:24 225
8 Set Matrix Zeros code Arrays 48:04 300
9 Spiral Order Matrix II code Arrays 48:40 225
10 Largest Number code Arrays 70:26 225
11 First Missing Integer code Arrays 64:38 300
12 Add One To Number code Arrays
43:43 225
13 N/3 Repeat Number code Arrays
68:22 600
14 Pascal Triangle code Arrays 26:46 225
15 Maximum Consecutive Gap code Arrays 58:40 450
16 Max Distance code Arrays 68:14 250
17 Next Permutation code Arrays 63:13 300
18 Wave Array code Arrays 22:08 225
19 Anti Diagonals code Arrays 41:46 225
20 Hotel Bookings Possible code Arrays 66:06 225
21 Min Steps in Infinite Grid code Arrays 37:51 150
22 Flip code Arrays 78:22 400
23 Find Permutation code Arrays 55:59 300
24 Maximum Absolute Difference code Arrays 65:51 250
25 Maximum Unsorted Subarray code Arrays 68:51 250
26 Noble Integer code Arrays
43:30 200
27 Triplets with Sum between given range code Arrays
75:03 200
28 Partitions code Arrays 70:15 300
29 Multiple left rotations of the array code Arrays 21:45 200
30 Minimum Lights to Activate code Arrays 66:04 200
31 Maximum Sum Triplet code Arrays 70:26 200
32 Maximum Sum Square SubMatrix code Arrays 48:49 300
33 Maximum Area of Triangle! code Arrays 50:55 350
34 Perfect Peak of Array code Arrays 45:46 200
35 Leaders in an array code Arrays 19:07 200
36 Pick from both sides! code Arrays 52:51 100
37 Sort array with squares! code Arrays 29:00 200
38 Balance Array code Arrays 55:35 200
39 Max Min code Arrays
17:16 150
40 All Unique Permutations code Backtracking
51:30 200
41 Kth Permutation Sequence code Backtracking 75:12 350
42 Combination Sum code Backtracking 62:20 300
43 Permutations code Backtracking 39:38 350
44 Generate all Parentheses II code Backtracking
52:15 350
45 Combination Sum II code Backtracking 41:27 300
46 NQueens code Backtracking 74:08 550
47 Combinations code Backtracking 46:01 300
48 Sudoku code Backtracking 68:26 700
49 Gray Code code Backtracking
57:50 350
50 Subsets II code Backtracking 40:36 300
51 Letter Phone code Backtracking 53:26 250
52 Subset code Backtracking 61:56 250
53 Palindrome Partitioning code Backtracking 67:45 300
54 Maximal String code Backtracking
52:37 200
55 Merge K Sorted Lists code Heaps And Maps 43:37 600
56 LRU Cache code Heaps And Maps 74:21 1000
57 Distinct Numbers in Window code Heaps And Maps 39:07 600
58 Magician and Chocolates code Heaps And Maps
42:01 250
59 Ways to form Max Heap code Heaps And Maps 72:31 200
60 N max pair combinations code Heaps And Maps 77:24 200
61 Find Rectangle in binary matrix code Heaps And Maps
36:08 200
62 Maximum Sum Combinations code Heaps And Maps 44:07 300
63 K Largest Elements code Heaps And Maps 18:39 200
64 Profit Maximisation code Heaps And Maps 18:52 200
65 Merge K sorted arrays! code Heaps And Maps 23:53 200
66 Convert Integer To Roman Number shell Regex and Functions
29:55 400
67 Sort by Frequency shell Regex and Functions
32:29 250
68 Swap Forward And Backward Slash shell Regex and Functions
14:26 200
69 Valid Email Address shell Regex and Functions
30:52 350
70 Swap List Nodes in pairs code Linked Lists 33:34 350
71 Rotate List code Linked Lists 33:58 350
72 Reorder List code Linked Lists 57:10 600
73 Sort List code Linked Lists
58:48 350
74 Remove Duplicates from Sorted List II code Linked Lists 57:51 300
75 Merge Two Sorted Lists code Linked Lists 29:11 300
76 Remove Duplicates from Sorted List code Linked Lists 17:58 300
77 Add Two Numbers as Lists code Linked Lists 43:07 250
78 Remove Nth Node from List End code Linked Lists 27:38 350
79 Partition List code Linked Lists
49:36 275
80 Insertion Sort List code Linked Lists
49:04 300
81 List Cycle code Linked Lists 39:15 600
82 Reverse Link List II code Linked Lists 57:24 450
83 Palindrome List code Linked Lists 47:06 200
84 K reverse linked list code Linked Lists 60:25 200
85 Reverse Alternate K Nodes code Linked Lists 45:04 300
86 Kth Node From Middle code Linked Lists 28:02 200
87 Sort Binary Linked List code Linked Lists 30:31 200
88 Even Reverse code Linked Lists 39:07 200
89 Lines in a given range shell Basic Shell Commands
28:36 200
90 Valid phone number shell Basic Shell Commands
21:32 150
91 Transform CSV shell Basic Shell Commands
19:35 300
92 Remove Punctuations shell Basic Shell Commands
12:32 250
93 NESTED_CMPL2 objective Time Complexity
1:25 30
94 CHOOSE3 objective Time Complexity
1:39 50
95 NESTED_CMPL3 objective Time Complexity
3:56 80
96 CHOOSE4 objective Time Complexity
0:57 50
97 AMORTIZED1 objective Time Complexity
3:03 100
98 CHOOSE2 objective Time Complexity
2:23 80
99 GCD_CMPL objective Time Complexity
4:13 150
100 LOOP_CMPL2 objective Time Complexity
2:43 80
101 WHILE_CMPL objective Time Complexity
1:31 50
102 CHOOSE1 objective Time Complexity
1:43 50
103 LOOP_CMPL objective Time Complexity
2:43 20
104 NESTED_CMPL objective Time Complexity
1:10 20
105 REC_CMPL1 objective Time Complexity
6:58 80
106 REC_CMPL2 objective Time Complexity
6:25 80
107 REC_CMPL3 objective Time Complexity
4:39 150
108 Actors and their Movies sql SQL Programming
35:08 100
109 Movie Character sql SQL Programming
32:59 100
110 Neutral Reviewers sql SQL Programming
24:04 100
111 Short Films sql SQL Programming
28:59 100
112 OSI Model-1 objective Basics of Computer Networking
3:37 30
113 OSI Model-3 objective Basics of Computer Networking
2:51 30
114 Evaluate Expression code Stacks And Queues
32:46 400
115 Rain Water Trapped code Stacks And Queues 59:06 400
116 Largest Rectangle in Histogram code Stacks And Queues 65:52 450
117 Sliding Window Maximum code Stacks And Queues 69:34 450
118 Simplify Directory Path code Stacks And Queues
53:56 250
119 Min Stack code Stacks And Queues 43:31 400
120 Redundant Braces code Stacks And Queues 42:41 300
121 Nearest Smaller Element code Stacks And Queues 41:37 350
122 MAXSPPROD code Stacks And Queues
88:01 200
123 First non-repeating character in a stream of characters code Stacks And Queues 55:23 200
124 Balanced Parantheses! code Stacks And Queues 15:12 200
125 Palindrome Integer code Math
HCL
17:28 200
126 Excel Column Number code Math 23:19 175
127 Reverse integer code Math 28:36 200
128 Excel Column Title code Math 41:11 175
129 Grid Unique Paths code Math 32:35 375
130 Trailing Zeros in Factorial code Math 18:58 250
131 Rearrange Array code Math
49:03 250
132 Greatest Common Divisor code Math 10:57 200
133 Power Of Two Integers code Math 39:36 250
134 Prime Sum code Math 43:15 150
135 Sorted Permutation Rank code Math 77:43 250
136 Sorted Permutation Rank with Repeats code Math 65:13 500
137 Largest Coprime Divisor code Math
49:08 250
138 Sum of pairwise Hamming Distance code Math
66:44 200
139 Numbers of length N and value less than K code Math
89:32 200
140 FizzBuzz code Math
12:34 200
141 City Tour code Math
58:11 300
142 Next Similar Number code Math 50:41 200
143 Is Rectangle? code Math 10:17 200
144 Find Nth Fibonacci code Math
45:23 200
145 Step by Step code Math 40:33 200
146 Next Smallest Palindrome! code Math 50:27 400
147 Distribute in Circle! code Math 19:13 100
148 Total Moves For Bishop! code Math 27:04 75
149 Inorder Traversal code Tree Data Structure 32:00 350
150 Recover Binary Search Tree code Tree Data Structure 63:59 750
151 Inorder Traversal of Cartesian Tree code Tree Data Structure 50:35 300
152 Least Common Ancestor code Tree Data Structure 57:33 450
153 Construct Binary Tree From Inorder And Preorder code Tree Data Structure 46:08 375
154 Flatten Binary Tree to Linked List code Tree Data Structure 43:38 500
155 Preorder Traversal code Tree Data Structure 15:26 350
156 Max Depth of Binary Tree code Tree Data Structure 6:57 350
157 Binary Tree From Inorder And Postorder code Tree Data Structure 50:09 375
158 Balanced Binary Tree code Tree Data Structure 30:19 275
159 Sorted Array To Balanced BST code Tree Data Structure 28:44 300
160 Sum Root to Leaf Numbers code Tree Data Structure
45:24 350
161 Symmetric Binary Tree code Tree Data Structure 22:00 300
162 Postorder Traversal code Tree Data Structure 31:28 350
163 Populate Next Right Pointers Tree code Tree Data Structure 50:39 900
164 Identical Binary Trees code Tree Data Structure 11:36 300
165 BST Iterator code Tree Data Structure 41:09 500
166 ZigZag Level Order Traversal BT code Tree Data Structure 42:13 350
167 Path Sum code Tree Data Structure 27:35 350
168 Min Depth of Binary Tree code Tree Data Structure 17:20 350
169 Root to Leaf Paths With Sum code Tree Data Structure 41:06 350
170 Order of People Heights code Tree Data Structure
74:32 700
171 Shortest Unique Prefix code Tree Data Structure
68:30 350
172 Invert the Binary Tree code Tree Data Structure
12:46 300
173 Kth Smallest Element In Tree code Tree Data Structure 29:17 300
174 2-Sum Binary Tree code Tree Data Structure 63:38 400
175 Vertical Order traversal of Binary Tree code Tree Data Structure 73:15 200
176 Hotel Reviews code Tree Data Structure 73:31 200
177 Right view of Binary tree code Tree Data Structure 29:14 200
178 Valid BST from Preorder code Tree Data Structure 55:45 100
179 Diagonal Traversal code Tree Data Structure 44:35 200
180 Cousins in Binary Tree code Tree Data Structure 53:59 200
181 Path to Given Node code Tree Data Structure 38:03 200
182 Remove Half Nodes code Tree Data Structure 43:48 200
183 Merge two Binary Tree code Tree Data Structure 28:45 200
184 Reverse Level Order code Tree Data Structure 23:20 249
185 Maximum Edge Removal code Tree Data Structure 41:27 300
186 Maximum level sum code Tree Data Structure 18:39 200
187 Xor Between Two Arrays! code Tree Data Structure 45:36 150
188 Burn a Tree code Tree Data Structure 50:10 200
189 Matrix Search code Binary Search
36:51 250
190 Median of Array code Binary Search 86:23 325
191 Search for a Range code Binary Search
42:02 250
192 Square Root of Integer code Binary Search 40:32 275
193 Implement Power Function code Binary Search
59:44 275
194 Rotated Sorted Array Search code Binary Search 56:53 325
195 Sorted Insert Position code Binary Search
25:03 250
196 Allocate Books code Binary Search
67:35 350
197 Painter's Partition Problem code Binary Search 81:30 350
198 Matrix Median code Binary Search 77:24 225
199 Simple Queries code Binary Search
61:38 300
200 Find a peak element code Binary Search
19:06 200
201 Smaller or equal elements code Binary Search
28:40 200
202 WoodCutting Made Easy! code Binary Search 51:31 200
203 Search in Bitonic Array! code Binary Search 46:35 100
204 Implement StrStr code Strings 33:14 225
205 Integer To Roman code Strings 42:00 250
206 Palindrome String code Strings
30:40 150
207 Longest Common Prefix code Strings
27:45 225
208 Roman To Integer code Strings 33:02 250
209 Length of Last Word code Strings 17:54 225
210 Multiply Strings code Strings
63:39 375
211 Valid Number code Strings 59:07 250
212 Zigzag String code Strings
52:34 300
213 Atoi code Strings 52:19 250
214 Valid Ip Addresses code Strings 66:18 250
215 Compare Version Numbers code Strings 66:33 225
216 Longest Palindromic Substring code Strings 59:51 500
217 Pretty Json code Strings
63:16 400
218 Count And Say code Strings 43:00 250
219 Justified Text code Strings
76:51 300
220 Add Binary Strings code Strings
40:40 300
221 Reverse the String code Strings 36:31 250
222 Power of 2 code Strings 62:35 350
223 Minimum Characters required to make a String Palindromic code Strings 64:41 200
224 Amazing Subarrays code Strings
26:39 150
225 Stringoholics code Strings
62:30 300
226 Convert to Palindrome code Strings 36:26 200
227 Vowel and Consonant Substrings! code Strings
33:39 200
228 Minimum Appends for Palindrome! code Strings
39:49 200
229 Remove Consecutive Characters code Strings 37:08 200
230 Minimum Parantheses! code Strings
23:08 200
231 Design Cache subjective Storage Scalability 40:00 200
232 Highly Available Database subjective Storage Scalability 50:00 400
233 Highly Consistent Database subjective Storage Scalability
50:00 400
234 Sharding a Database subjective Storage Scalability 35:00 200
235 Convert Sorted List to Binary Search Tree code Graph Data Structure & Algorithms
43:45 300
236 Level Order code Graph Data Structure & Algorithms 29:49 300
237 Capture Regions on Board code Graph Data Structure & Algorithms
64:16 500
238 Word Ladder II code Graph Data Structure & Algorithms 62:17 800
239 Clone Graph code Graph Data Structure & Algorithms 55:28 500
240 Word Search Board code Graph Data Structure & Algorithms 57:03 500
241 Word Ladder I code Graph Data Structure & Algorithms 66:20 600
242 Sum Of Fibonacci Numbers code Graph Data Structure & Algorithms
51:30 300
243 Stepping Numbers code Graph Data Structure & Algorithms 57:14 300
244 Black Shapes code Graph Data Structure & Algorithms 48:25 300
245 Knight On Chess Board code Graph Data Structure & Algorithms 65:52 300
246 Smallest Multiple With 0 and 1 code Graph Data Structure & Algorithms 70:17 300
247 Largest Distance between nodes of a Tree code Graph Data Structure & Algorithms
74:49 200
248 Commutable Islands code Graph Data Structure & Algorithms 74:21 200
249 Possibility of finishing all courses given pre-requisites code Graph Data Structure & Algorithms 63:08 200
250 Valid Path code Graph Data Structure & Algorithms 81:36 200
251 Cycle in Directed Graph code Graph Data Structure & Algorithms 47:16 200
252 Cycle in Undirected Graph code Graph Data Structure & Algorithms 46:38 200
253 Snake Ladder Problem! code Graph Data Structure & Algorithms 54:40 200
254 Region in BinaryMatrix code Graph Data Structure & Algorithms 39:39 200
255 Min Cost Path code Graph Data Structure & Algorithms 64:20 300
256 Two teams? code Graph Data Structure & Algorithms 43:28 300
257 Permutation Swaps! code Graph Data Structure & Algorithms 53:51 300
258 Delete Edge! code Graph Data Structure & Algorithms 60:20 200
259 Useful Extra Edges code Graph Data Structure & Algorithms 62:08 400
260 Path in Directed Graph code Graph Data Structure & Algorithms 31:43 150
261 Path with good nodes! code Graph Data Structure & Algorithms 44:46 150
262 Water Flow code Graph Data Structure & Algorithms
55:05 200
263 Gas Station code Greedy Algorithm 56:31 700
264 Majority Element code Greedy Algorithm 19:07 400
265 Distribute Candy code Greedy Algorithm 64:43 300
266 Seats code Greedy Algorithm 72:26 300
267 Highest Product code Greedy Algorithm 29:24 200
268 Assign Mice to Holes code Greedy Algorithm 21:16 300
269 Bulbs code Greedy Algorithm
23:08 200
270 Meeting rooms code Greedy Algorithm 52:53 200
271 Largest Permutation code Greedy Algorithm 42:20 250
272 Disjoint Intervals code Greedy Algorithm
35:35 200
273 Diffk code Two Pointers
29:31 300
274 Intersection Of Sorted Arrays code Two Pointers
18:20 225
275 Merge Two Sorted Lists II code Two Pointers 25:38 200
276 3 Sum code Two Pointers 60:04 225
277 Remove Duplicates from Sorted Array code Two Pointers 31:38 250
278 Sort by Color code Two Pointers
23:13 325
279 Array 3 Pointers code Two Pointers
53:38 400
280 Container With Most Water code Two Pointers 48:25 400
281 3 Sum Zero code Two Pointers
53:55 225
282 Remove Duplicates from Sorted Array II code Two Pointers 33:44 250
283 Remove Element from Array code Two Pointers 28:29 250
284 Max Continuous Series of 1s code Two Pointers 77:27 300
285 Counting Triangles code Two Pointers
63:58 225
286 Minimize the absolute difference code Two Pointers
60:06 200
287 Pair With Given Difference code Two Pointers 35:03 200
288 Maximum Ones After Modification code Two Pointers 45:17 200
289 Counting Subarrays! code Two Pointers 41:26 200
290 Subarrays with distinct integers! code Two Pointers 49:09 250
291 Reverse Bits code Bit Manipulation 23:50 225
292 Number of 1 Bits code Bit Manipulation 8:47 200
293 Single Number code Bit Manipulation 11:53 275
294 Divide Integers code Bit Manipulation 66:47 250
295 Single Number II code Bit Manipulation 39:22 275
296 Different Bits Sum Pairwise code Bit Manipulation
50:58 300
297 Min XOR value code Bit Manipulation 37:42 200
298 Count Total Set Bits code Bit Manipulation 57:01 200
299 Palindromic Binary Representation code Bit Manipulation 54:47 200
300 Trailing Zeroes code Bit Manipulation 13:19 200
301 XOR-ing the Subarrays! code Bit Manipulation 29:22 200
302 Longest Increasing Subsequence code Dynamic Programming 30:39 300
303 Max Rectangle in Binary Matrix code Dynamic Programming
76:25 350
304 Distinct Subsequences code Dynamic Programming
64:26 325
305 Unique Paths in a Grid code Dynamic Programming
33:24 300
306 Max Product Subarray code Dynamic Programming 63:54 300
307 Ways to Decode code Dynamic Programming 69:48 225
308 Best Time to Buy and Sell Stocks II code Dynamic Programming 40:06 225
309 Best Time to Buy and Sell Stocks III code Dynamic Programming 61:30 700
310 Scramble String code Dynamic Programming
65:06 500
311 Best Time to Buy and Sell Stocks I code Dynamic Programming 27:57 300
312 Max Sum Path in Binary Tree code Dynamic Programming 54:24 400
313 Regular Expression Match code Dynamic Programming
72:44 500
314 Dungeon Princess code Dynamic Programming
66:58 300
315 Palindrome Partitioning II code Dynamic Programming 60:01 400
316 Min Sum Path in Matrix code Dynamic Programming 30:18 300
317 Min Jumps Array code Dynamic Programming 70:41 300
318 Edit Distance code Dynamic Programming 47:01 300
319 Unique Binary Search Trees II code Dynamic Programming 35:11 400
320 Word Break code Dynamic Programming
IBM
65:00 400
321 Regular Expression II code Dynamic Programming
64:13 500
322 Min Sum Path in Triangle code Dynamic Programming
42:17 300
323 Jump Game Array code Dynamic Programming 41:11 225
324 Interleaving Strings code Dynamic Programming
60:23 500
325 Word Break II code Dynamic Programming
IBM
65:20 350
326 Longest valid Parentheses code Dynamic Programming
59:24 700
327 Stairs code Dynamic Programming 15:14 225
328 Max Sum Without Adjacent Elements code Dynamic Programming 57:26 225
329 Repeating Sub-Sequence code Dynamic Programming
63:35 300
330 Evaluate Expression To True code Dynamic Programming 66:13 350
331 Coins in a Line code Dynamic Programming
61:47 300
332 Arrange II code Dynamic Programming 67:44 350
333 Equal Average Partition code Dynamic Programming 73:39 350
334 Coin Sum Infinite code Dynamic Programming
63:17 225
335 Rod Cutting code Dynamic Programming
69:10 350
336 Intersecting Chords in a Circle code Dynamic Programming
67:34 300
337 Count Permutations of BST code Dynamic Programming
65:15 400
338 Queen Attack code Dynamic Programming
60:52 350
339 Longest Arithmetic Progression code Dynamic Programming
72:25 200
340 Sub Matrices with sum Zero code Dynamic Programming
70:30 200
341 N digit numbers with digit sum S code Dynamic Programming
71:07 200
342 Length of Longest Subsequence code Dynamic Programming
65:01 200
343 Shortest common superstring code Dynamic Programming
62:24 200
344 Flip Array code Dynamic Programming
72:19 200
345 Smallest sequence with given Primes code Dynamic Programming 64:38 200
346 Ways to color a 3xN Board code Dynamic Programming 60:24 200
347 Tushar's Birthday Bombs code Dynamic Programming
75:45 200
348 Tushar's Birthday Party code Dynamic Programming 67:07 200
349 Kth Manhattan Distance Neighbourhood code Dynamic Programming 58:12 200
350 Largest area of rectangle with permutations code Dynamic Programming 73:32 200
351 Kingdom War code Dynamic Programming
55:45 200
352 Longest Common Subsequence code Dynamic Programming 40:12 200
353 Longest Palindromic Subsequence code Dynamic Programming
39:13 200
354 Best Time to Buy and Sell Stock atmost B times code Dynamic Programming 55:15 200
355 Maximum Path in Triangle code Dynamic Programming 29:37 200
356 0-1 Knapsack code Dynamic Programming 44:03 200
357 Chain of Pairs code Dynamic Programming 35:29 200
358 Maximum Size Square Sub-matrix code Dynamic Programming 36:06 200
359 Tiling With Dominoes code Dynamic Programming 50:49 200
360 Increasing Path in Matrix code Dynamic Programming
38:53 200
361 Egg Drop Problem! code Dynamic Programming 51:54 450
362 Paint House! code Dynamic Programming
32:03 200
363 Minimum Difference Subsets! code Dynamic Programming 40:08 200
364 Subset Sum Problem! code Dynamic Programming 39:19 200
365 Merge elements code Dynamic Programming 53:28 300
366 Max edge queries! code Dynamic Programming 57:28 200
367 Substring Concatenation code Hashing
70:41 1000
368 Window String code Hashing 79:48 350
369 4 Sum code Hashing 70:36 325
370 Anagrams code Hashing 46:36 350
371 Fraction code Hashing 80:36 450
372 Points on the Straight Line code Hashing 76:14 450
373 2 Sum code Hashing 49:18 300
374 Valid Sudoku code Hashing 49:37 325
375 Copy List code Hashing 55:12 450
376 Diffk II code Hashing
29:01 375
377 Longest Substring Without Repeat code Hashing 51:09 350
378 Colorful Number code Hashing 44:55 150
379 Equal code Hashing
70:31 350
380 Largest Continuous Sequence Zero Sum code Hashing
68:00 200
381 Pairs With Given Xor code Hashing 24:17 200
382 Check Palindrome! code Hashing
15:49 200
383 An Increment Problem code Hashing 41:43 200
384 Subarray with given XOR code Hashing 40:05 200
385 Two out of Three code Hashing 30:12 200
386 Subarray with B odd numbers code Hashing 42:20 200
387 Subarray with equal occurences! code Hashing 31:40 200
388 Longest Subarray Length code Hashing 41:46 200
389 First Repeating element code Hashing 19:15 200
390 100 People in a Circle objective Puzzles
12:41 40
391 Ants on a Triangle objective Puzzles
5:03 40
392 Arrange Cubes objective Puzzles
17:28 40
393 Bee Travel objective Puzzles
8:50 40
394 Blindfolded Coin Toss objective Puzzles
3:31 40
395 Breaking Chocolate Bars objective Puzzles
5:20 40
396 Cats and a Square objective Puzzles
8:28 40
397 Celebrity Problem objective Puzzles
9:25 40
398 Color of the Bear objective Puzzles
3:38 40
399 Color of the last ball objective Puzzles
5:32 40
400 Color of the last ball II objective Puzzles
3:23 40
401 Cross the Bridge objective Puzzles
9:24 40
402 Cross the Bridge II objective Puzzles
5:52 40
403 Daughters' Ages objective Puzzles
12:38 40
404 Dinner Hand Shakes objective Puzzles
7:25 40
405 Divide Gold Bar objective Puzzles 6:11 40
406 Divide the Cake objective Puzzles
3:04 40
407 Eggs and Building objective Puzzles 14:07 40
408 Equilateral Triangles using Toothpicks objective Puzzles
6:12 40
409 Fake Note objective Puzzles
5:44 40
410 Fastest Horses objective Puzzles
7:28 40
411 Find the Defective Ball objective Puzzles
6:47 40
412 Find the Defective Ball II objective Puzzles
3:14 40
413 Gates of Heaven objective Puzzles
8:28 40
414 Genie and Hats objective Puzzles
7:56 40
415 Good Processor objective Puzzles
8:16 40
416 Helium Balloon objective Puzzles
1:55 40
417 Jelly Beans Jars objective Puzzles
7:57 40
418 Last Palindromic Date objective Puzzles
11:38 40
419 Light Switches in the Cellar objective Puzzles 3:03 40
420 Make a Statement objective Puzzles 4:27 40
421 Marbles in Jar objective Puzzles
11:50 40
422 Measure Milk by Cans objective Puzzles 16:06 40
423 Measure Time by Burning Ropes objective Puzzles
7:04 40
424 Measure Time by Hourglass objective Puzzles
9:31 40
425 Medicine Chest on a Boat objective Puzzles
9:30 40
426 Min Elevator Trips objective Puzzles
21:39 40
427 Monkeys and Doors objective Puzzles 11:49 40
428 Next Number objective Puzzles
18:21 40
429 Next Number II objective Puzzles 3:13 40
430 One Mile on the Globe objective Puzzles
7:57 40
431 Prisoners and Poison objective Puzzles 18:31 40
432 Quarters on a Table objective Puzzles
5:14 40
433 Ratio of Boys and Girls objective Puzzles
15:35 40
434 Six Colored Cubes objective Puzzles
14:06 40
435 Spider's Web objective Puzzles 3:43 40
436 Spinning Disc's Direction objective Puzzles
7:37 40
437 Ten Black and White Socks objective Puzzles
4:23 40
438 The Tribe objective Puzzles 6:24 40
439 Train Station objective Puzzles
19:13 40
440 Two Numbers objective Puzzles
12:49 40
441 Two Pills each day objective Puzzles
3:29 40
442 Wizards and Drawves objective Puzzles
13:05 40
443 World Trips objective Puzzles
9:45 40
444 Design Messenger subjective System Design Interview Questions 41:40 600
445 Design Search Typeahead subjective System Design Interview Questions
53:20 400
446 Design Twitter subjective System Design Interview Questions 38:20 600
447 Design URL Shortener subjective System Design Interview Questions 45:00 300