Prepare for the uber online assessment test questions for the post of uber senior software engineer by practicing problems on CodeStudio.

Problem Title

Difficulty

Avg Time to solve

Attempted

Implementation: HashMap

38

Easy

30 mins

159

Find Number Of Islands

10

Moderate

34 mins

271

Smallest Subarray With K Distinct Elements

22

Easy

20 mins

162

Implement Trie

6

Hard

41 mins

65

LRU Cache Implementation

11

Moderate

25 mins

167

Sudoku?

80

Moderate

40 mins

259

Longest Consecutive Sequence

23

Moderate

40 mins

612

Right View

4

Moderate

35 mins

213

Distinct Subsequences

12

Moderate

10 mins

313

Execution Time

0

Moderate

15 mins

40

House Robber

2

Moderate

15 mins

194

Algorithm to find best insert position in sorted array

7

Easy

10 mins

157

Print Nodes at Distance K From a Given Node

3

Hard

20 mins

105

Next Permutation

4

Moderate

15 mins

224

Serialize/Deserialize The Binary Tree

6

Hard

15 mins

103

Deepest Left

2

Moderate

15 mins

109

Add One to Linked List

4

Easy

10 mins

127

Bipartite Graph

18

Moderate

50 mins

204

Check N numbers

1

Moderate

10 mins

21

Squares of a Sorted Array

2

Easy

15 mins

150

Settle Debt

2

Hard

20 mins

41

Binary Tree Cameras

7

Hard

50 mins

70

Search In A 2D Matrix

3

Easy

10 mins

260

Combination Sum

7

Easy

15 mins

38

Roman Numeral To Integer

2

Easy

15 mins

94

Implementation: HashMap NEW

Easy

38 upvotes

Find Number Of Islands NEW

Moderate

10 upvotes

Smallest Subarray With K Distinct Elements NEW

Easy

22 upvotes

Implement Trie NEW

Hard

6 upvotes

LRU Cache Implementation NEW

Moderate

11 upvotes

Sudoku? NEW

Moderate

80 upvotes

Longest Consecutive Sequence NEW

Moderate

23 upvotes

Right View NEW

Moderate

4 upvotes

Distinct Subsequences NEW

Moderate

12 upvotes

Execution Time NEW

Moderate

0 upvotes

House Robber NEW

Moderate

2 upvotes

Algorithm to find best insert position in sorted array NEW

Easy

7 upvotes

Print Nodes at Distance K From a Given Node NEW

Hard

3 upvotes

Next Permutation NEW

Moderate

4 upvotes

Serialize/Deserialize The Binary Tree NEW

Hard

6 upvotes

Deepest Left NEW

Moderate

2 upvotes

Add One to Linked List NEW

Easy

4 upvotes

Bipartite Graph NEW

Moderate

18 upvotes

Check N numbers NEW

Moderate

1 upvote

Squares of a Sorted Array NEW

Easy

2 upvotes

Settle Debt NEW

Hard

2 upvotes

Binary Tree Cameras NEW

Hard

7 upvotes

Search In A 2D Matrix NEW

Easy

3 upvotes

Combination Sum NEW

Easy

7 upvotes

Roman Numeral To Integer NEW

Easy

2 upvotes

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