DSA Interview Questions

150 coding interview questions, including the full Blind 75, each tagged with the companies that ask it, its difficulty and its time and space complexity.

Premium UnlockedLeetCode Premium — for Free

150 problemsBlind 75Company filters

150 questions found

43Knapsack 2

Hard

Google

Amazon

Dynamic ProgrammingKnapsack

Solve

44Apple and Orange

Easy

HackerRank

Implementation

Solve

45Merge Two Sorted Lists

Easy

Amazon

Microsoft

Google

Linked ListRecursion

Solve

46Way Too Long Words

Easy

Mail.Ru

StringImplementation

Solve

47Longest Common Subsequence

Medium

Amazon

Microsoft

Google

Dynamic ProgrammingMulti Dimensions DP

Solve

48Number of Islands

Medium

Amazon

Microsoft

Google+1

Depth-First SearchBreadth-First SearchUnion Find

Solve

49Petya and Strings

Easy

Yandex

ImplementationStrings

Solve

50Coin Combinations I

Medium

Google

Amazon

Dynamic ProgrammingLinear DP

Solve

51Birthday Cake Candles

Easy

HackerRank

Implementation

Solve

523Sum

Medium

Amazon

Microsoft

Google+1

ArrayTwo PointersSorting

Solve

53Beautiful Matrix

Easy

Yandex

Implementation

Solve

54Edit Distance

Hard

Google

Amazon

Microsoft

Dynamic ProgrammingStringMulti Dimensions DP

Solve

55Time Conversion

Easy

HackerRank

StringsImplementation

Solve

56Maximum Subarray Sum

Medium

Amazon

Microsoft

Google

ArrayDivide and ConquerDynamic Programming

Solve