Get to know how you can ace the interviews of reputed product-based companies like Flipkart and Snapdeal by practicing basic interview questions on CodeStudio.

Problem Title

Difficulty

Avg Time to solve

Attempted

Preorder Binary Tree NEW

13

Easy

10 mins

36933

Postorder Binary Tree NEW

4

Easy

15 mins

33454

Merge Intervals NEW

42

Moderate

20 mins

1727

Sliding Maximum NEW

13

Moderate

25 mins

1113

Symmetric Tree NEW

15

Easy

20 mins

1359

Implementation: HashMap NEW

61

Easy

30 mins

3510

Valid String NEW

26

Moderate

18 mins

588

LRU Cache Implementation NEW

21

Moderate

25 mins

873

Decode String NEW

3

Easy

15 mins

53

Best Time to Buy and Sell NEW

7

Moderate

20 mins

203

Maximum Width In Binary Tree NEW

7

Moderate

38 mins

747

Boundary Traversal of Binary Tree NEW

65

Hard

20 mins

2785

Container With Most Water NEW

30

Moderate

15 mins

1879

Boxes Of Chocolates NEW

2

Moderate

20 mins

101

Closest Sum NEW

0

Moderate

30 mins

102

Painters And Boards NEW

3

Moderate

15 mins

62

Sub-array Sums Divisible By K NEW

2

Moderate

25 mins

44

Kth largest element in the unsorted array NEW

7

Moderate

10 mins

879

Candies NEW

8

Moderate

10 mins

513

Jump Game NEW

14

Moderate

15 mins

641

Longest Bracket NEW

3

Moderate

20 mins

69

Amazing Strings NEW

5

Easy

15 mins

261

Admission in Ninja Gram NEW

6

Easy

15 mins

242

Print Diagonal NEW

1

Moderate

30 mins

45

Normal BST To Balanced BST NEW

5

Moderate

15 mins

978

Preorder Binary Tree NEW

Easy

13 upvotes

Postorder Binary Tree NEW

Easy

4 upvotes

Merge Intervals NEW

Moderate

42 upvotes

Sliding Maximum NEW

Moderate

13 upvotes

Symmetric Tree NEW

Easy

15 upvotes

Implementation: HashMap NEW

Easy

61 upvotes

Valid String NEW

Moderate

26 upvotes

LRU Cache Implementation NEW

Moderate

21 upvotes

Decode String NEW

Easy

3 upvotes

Best Time to Buy and Sell NEW

Moderate

7 upvotes

Maximum Width In Binary Tree NEW

Moderate

7 upvotes

Boundary Traversal of Binary Tree NEW

Hard

65 upvotes

Container With Most Water NEW

Moderate

30 upvotes

Boxes Of Chocolates NEW

Moderate

2 upvotes

Closest Sum NEW

Moderate

0 upvotes

Painters And Boards NEW

Moderate

3 upvotes

Sub-array Sums Divisible By K NEW

Moderate

2 upvotes

Kth largest element in the unsorted array NEW

Moderate

7 upvotes

Candies NEW

Moderate

8 upvotes

Jump Game NEW

Moderate

14 upvotes

Longest Bracket NEW

Moderate

3 upvotes

Amazing Strings NEW

Easy

5 upvotes

Admission in Ninja Gram NEW

Easy

6 upvotes

Print Diagonal NEW

Moderate

1 upvote

Normal BST To Balanced BST NEW

Moderate

5 upvotes

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