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Fastly LeetCode Interview Questions

Practice 36 real coding problems frequently asked in Fastly technical interviews. Master these questions to ace your next Fastly software engineering interview.

14 Easy
17 Medium
5 Hard

Top Topics at Fastly

ArrayStringHash TableTwo PointersDynamic Programming

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Fastly Interview Problems

ProblemDifficultyDiffFrequencyTopicsAction
Palindromic Substrings
100%
MediumM
100%
Two PointersString+1
Solve→
Valid Word Abbreviation
97%
EasyE
97%
Two PointersString
Solve→
Counting Bits
97%
EasyE
97%
Dynamic ProgrammingBit Manipulation
Solve→
Two Best Non-Overlapping Events
94%
MediumM
94%
ArrayBinary Search+3
Solve→
Final Array State After K Multiplication Operations I
92%
EasyE
92%
ArrayMath+2
Solve→
Valid Number
91%
HardH
91%
String
Solve→
Best Time to Buy and Sell Stock II
90%
MediumM
90%
ArrayDynamic Programming+1
Solve→
First Unique Character in a String
88%
EasyE
88%
Hash TableString+2
Solve→
Minimum Operations to Make Character Frequencies Equal
81%
HardH
81%
Hash TableString+3
Solve→
Plus One
79%
EasyE
79%
ArrayMath
Solve→
Continuous Subarrays
78%
MediumM
78%
ArrayQueue+4
Solve→
Integer to English Words
77%
HardH
77%
MathString+1
Solve→
The kth Factor of n
72%
MediumM
72%
MathNumber Theory
Solve→
Flood Fill
71%
EasyE
71%
ArrayDepth-First Search+2
Solve→
Letter Combinations of a Phone Number
68%
MediumM
68%
Hash TableString+1
Solve→
Closest Binary Search Tree Value
65%
EasyE
65%
Binary SearchTree+3
Solve→
Remove All Adjacent Duplicates In String
65%
EasyE
65%
StringStack
Solve→
Group Anagrams
64%
MediumM
64%
ArrayHash Table+2
Solve→
Maximum Number of Events That Can Be Attended
64%
MediumM
64%
ArrayGreedy+2
Solve→
Move Zeroes
63%
EasyE
63%
ArrayTwo Pointers
Solve→
Longest Arithmetic Subsequence of Given Difference
61%
MediumM
61%
ArrayHash Table+1
Solve→
Diameter of Binary Tree
60%
EasyE
60%
TreeDepth-First Search+1
Solve→
Check If N and Its Double Exist
58%
EasyE
58%
ArrayHash Table+3
Solve→
Adding Spaces to a String
50%
MediumM
50%
ArrayTwo Pointers+2
Solve→
House Robber II
50%
MediumM
50%
ArrayDynamic Programming
Solve→

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Remove Nth Node From End of List
49%
MediumM
49%
Linked ListTwo Pointers
Solve→
Word Pattern II
46%
MediumM
46%
Hash TableString+1
Solve→
String Compression
45%
MediumM
45%
Two PointersString
Solve→
Trapping Rain Water
42%
HardH
42%
ArrayTwo Pointers+3
Solve→
Word Ladder
38%
HardH
38%
Hash TableString+1
Solve→
Zero Array Transformation III
37%
MediumM
37%
ArrayGreedy+3
Solve→
Count Unhappy Friends
34%
MediumM
34%
ArraySimulation
Solve→
Min Stack
33%
MediumM
33%
StackDesign
Solve→
Maximum Nesting Depth of the Parentheses
33%
EasyE
33%
StringStack
Solve→
Kth Missing Positive Number
29%
EasyE
29%
ArrayBinary Search
Solve→
Logger Rate Limiter
24%
EasyE
24%
Hash TableDesign+1
Solve→

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Frequently Asked Questions

What LeetCode problems does Fastly ask in interviews?

Fastly commonly asks 36 coding problems in technical interviews, including Palindromic Substrings, Valid Word Abbreviation, Counting Bits. The difficulty breakdown is 14 Easy, 17 Medium, and 5 Hard problems.

How should I prepare for a Fastly coding interview?

Focus on the most frequently asked problems first, especially those with high frequency scores. Fastly interviews typically emphasize Array and String. Practice explaining your thought process while coding.

What is the difficulty level of Fastly coding interviews?

Based on our data, Fastly interviews include 14 Easy (39%), 17 Medium (47%), and 5 Hard (14%) problems.

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