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

17

Easy

10 mins

39081

Postorder Binary Tree

4

Easy

15 mins

35357

Merge Intervals

69

Moderate

20 mins

3802

Sliding Maximum

13

Moderate

25 mins

1152

Symmetric Tree

19

Easy

20 mins

1980

Implementation: HashMap

63

Easy

30 mins

3586

Valid String

29

Moderate

18 mins

650

LRU Cache Implementation

26

Moderate

25 mins

1240

Decode String

5

Easy

15 mins

78

Best Time to Buy and Sell

8

Moderate

20 mins

232

Maximum Width In Binary Tree

11

Moderate

38 mins

1164

Boundary Traversal of Binary Tree

77

Hard

20 mins

3998

Container With Most Water

35

Moderate

15 mins

2228

Boxes Of Chocolates

2

Moderate

20 mins

121

Closest Sum

0

Moderate

30 mins

138

Painters And Boards

3

Moderate

15 mins

68

Sub-array Sums Divisible By K

2

Moderate

25 mins

46

Kth largest element in the unsorted array

7

Moderate

10 mins

1149

Candies

8

Moderate

10 mins

640

Jump Game

15

Moderate

15 mins

727

Longest Bracket

3

Moderate

20 mins

70

Amazing Strings

5

Easy

15 mins

268

Admission in Ninja Gram

6

Easy

15 mins

249

Print Diagonal

1

Moderate

30 mins

45

Normal BST To Balanced BST

6

Moderate

15 mins

1375

Preorder Binary Tree NEW

Easy

17 upvotes

Postorder Binary Tree NEW

Easy

4 upvotes

Merge Intervals NEW

Moderate

69 upvotes

Sliding Maximum NEW

Moderate

13 upvotes

Symmetric Tree NEW

Easy

19 upvotes

Implementation: HashMap NEW

Easy

63 upvotes

Valid String NEW

Moderate

29 upvotes

LRU Cache Implementation NEW

Moderate

26 upvotes

Decode String NEW

Easy

5 upvotes

Best Time to Buy and Sell NEW

Moderate

8 upvotes

Maximum Width In Binary Tree NEW

Moderate

11 upvotes

Boundary Traversal of Binary Tree NEW

Hard

77 upvotes

Container With Most Water NEW

Moderate

35 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

15 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

6 upvotes

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