Top Graphs Interview Questions

Graphs solve real-world problems by simulating the problem area as a network, similar to social networks, telephone networks, and circuit networks. Codestudio has a set of graph interview questions. Practice and master all challenging graph coding questions at Coding Ninjas. You will find these graph interview questions in DSA rounds of top tech firms such as Google, Microsoft, Apple, Amazon, Meta, and many more.

Sort by

Problem Title

Difficulty

Avg Time to solve

Attempted

Alien dictionary

158

Hard

46 mins

2830

Check Bipartite Graph

43

Moderate

50 mins

3082

Roots of the tree having minimum height

29

Moderate

25 mins

554

Course Schedule

27

Easy

15 mins

774

Course Schedule II

12

Hard

50 mins

393

Number of squareful arrays

9

Hard

50 mins

184

Keys and Rooms

2

Moderate

30 mins

311

Evaluate Division

5

Moderate

15 mins

771

Clone Graph

31

Moderate

25 mins

1742

Count Strongly Connected Components (Kosaraju’s Algorithm)

24

Hard

40 mins

1972

Possible Bipartition

9

Moderate

20 mins

176

Find the City With the Smallest Number of Neighbors at a Threshold Distance

6

Moderate

15 mins

228

Regions Cut By Slashes

0

Moderate

30 mins

52

Reconstruct Itinerary

5

Moderate

15 mins

68

Validate Binary Tree Nodes

5

Moderate

15 mins

116

Redundant Connection - I

5

Moderate

15 mins

166

Ninja and his Courses

8

Hard

50 mins

43

Shortest alternate colored path

8

Moderate

20 mins

762

Path With Maximum Probability

2

Moderate

25 mins

75

Sort Integers by Factor Value

1

Moderate

30 mins

99

Number of Connected Computers.

5

Moderate

10 mins

202

Valid Pairing of Numbers

8

Hard

50 mins

46

Ninja's Gift

3

Hard

45 mins

115

Ninja And Flowers

5

Moderate

10 mins

61

Path to the nearest service station

2

Moderate

15 mins

147

Alien dictionary

Hard

158 upvotes

Check Bipartite Graph

Moderate

43 upvotes

Roots of the tree having minimum height

Moderate

29 upvotes

Course Schedule

Easy

27 upvotes

Course Schedule II

Hard

12 upvotes

Number of squareful arrays

Hard

9 upvotes

Keys and Rooms

Moderate

2 upvotes

Evaluate Division

Moderate

5 upvotes

Clone Graph

Moderate

31 upvotes

Count Strongly Connected Components (Kosaraju’s Algorithm)

Hard

24 upvotes

Possible Bipartition

Moderate

9 upvotes

Find the City With the Smallest Number of Neighbors at a Threshold Distance

Moderate

6 upvotes

Regions Cut By Slashes

Moderate

0 upvotes

Reconstruct Itinerary

Moderate

5 upvotes

Validate Binary Tree Nodes

Moderate

5 upvotes

Redundant Connection - I

Moderate

5 upvotes

Ninja and his Courses

Hard

8 upvotes

Shortest alternate colored path

Moderate

8 upvotes

Path With Maximum Probability

Moderate

2 upvotes

Sort Integers by Factor Value

Moderate

1 upvote

Number of Connected Computers.

Moderate

5 upvotes

Valid Pairing of Numbers

Hard

8 upvotes

Ninja's Gift

Hard

3 upvotes

Ninja And Flowers

Moderate

5 upvotes

Path to the nearest service station

Moderate

2 upvotes

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