Linkedin Programming Interview Questions
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To improve file transfer speed, a file is split into different portions and sent from multiple servers
Given a segment class,
In a list of words, find the shortest distance between word1 and word2
1, Closest K nodes to a target in BST? (Do it in O(n)?)
2, Nested List sum?
3, III. Square root of a number?
4, Expression operators? Add signs (+, -, *, /) to a string to form target
5, Top trending posts in last 5m, 1H, 1Day?
How to randomly select a number in an array?
array: [15, 2, 4, 5, 1, -2, 0]
Follow-up:
Given a second array freq where freq[i] represents the occurrence of the ith number in array, how to randomly select a number in array based on the frequency.
Extra requirement:
Could you complete the selection in a single-pass(go through each array only once)?
Phone:
- Questions from LC tagged LinkedIn.
Onsite:
- Get sqrt(x). Output a floored integer if result is not a perfect square. sqrt(18) = 4
- Implement BST, insert, delete, search.
- Design a dashboard for service logs stats (sort and aggregate). Scale from 1 to more machines. Discuss async and realtime as different scenarios.
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LeetCode
205 Isomorphic Strings Easy
187 Repeated DNA Sequences Medium
152 Maximum Product Subarray Medium
65 Valid Number Hard
150 Evaluate Reverse Polish Notation Medium
243 Shortest Word Distance Easy
245 Shortest Word Distance III Medium
256 Paint House Easy
244 Shortest Word Distance II Medium
170 Two Sum III - Data structure design Easy
198 House Robber Easy
47 Permutations II Medium
46 Permutations Medium
23 Merge k Sorted Lists Hard
173 Binary Search Tree Iterator Medium
103 Binary Tree Zigzag Level Order Traversal Medium
339 Nested List Weight Sum Easy
50 Pow(x, n) Medium
311 Sparse Matrix Multiplication Medium
57 Insert Interval Hard
277 Find the Celebrity Medium
156 Binary Tree Upside Down Medium
34 Search for a Range Medium
101 Symmetric Tree Easy
102 Binary Tree Level Order Traversal Medium
236 Lowest Common Ancestor of a Binary Tree Medium
238 Product of Array Except Self Medium
33 Search in Rotated Sorted Array Medium
149 Max Points on a Line Hard
297 Serialize and Deserialize Binary Tree Hard
254 Factor Combinations Medium
53 Maximum Subarray Easy
104 Maximum Depth of Binary Tree Easy
127 Word Ladder Medium
56 Merge Intervals Medium
21 Merge Two Sorted Lists Easy
1 Two Sum Easy
364 Nested List Weight Sum II Medium
366 Find Leaves of Binary Tree Medium
367 Valid Perfect Square Easy
68 Text Justification Hard
76 Minimum Window Substring Hard
464 Can I Win Medium
515 Find Largest Value in Each Tree Row Medium
605 Can Place Flowers Easy
633 Sum of Square Numbers Easy
647 Palindromic Substrings Medium
671 Second Minimum Node In a Binary Tree Easy
698 Partition to K Equal Sum Subsets Medium
716 Max Stack Hard
730 Count Different Palindromic Subsequences Hard
744 Find Smallest Letter Greater Than Target Easy
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