Coding Interview Questions

Review this list of 418 Coding interview questions and answers verified by hiring managers and candidates.

+ Share interview

Product

Engineering

Operations

Design

Marketing

Data

Sales

Finance

Consulting

Security

Share interview

Write a function to simulate 25 coin flips with 50/50 probability. Return the number of heads.
Coding
Add answer I was asked this
Coding
Given an unsorted array, find duplicate elements in constant time, without using inbuilt functions of python.
Software Engineer
Coding
+1 more
1 answer I was asked this
"I got it right"
Rudransh V. - "I got it right"See full answer
Software Engineer
Coding
+1 more
Asked at Bolt • 4 years ago
Implement a string sorting algorithm, treating digits as numbers.
Software Engineer
Coding
+1 more
Add answer I was asked this
Software Engineer
Coding
+1 more
Asked at Salesforce • a year ago
Given 2 strings, return the longest common substring.
Software Engineer
Coding
+1 more
1 answer I was asked this
"String commonStr(String str1, String str2) { int len1 = str1.length(); int len2 = str2.length(); if (len1 == 0 || len2 == 0) return ""; // let dpx reprsent the longest common str of 0...x int dp = new int len1 + 1; int maxLen = 0; int endIndex = 0; for (int i = 1; i <= len1; i++) { for (int j = 1; j <= len2; j++) { if (str1.charAt(i-1) == str2.charAt(j-1)) { dpi = dpi-1 + 1; "
Anonymous Eel - "String commonStr(String str1, String str2) { int len1 = str1.length(); int len2 = str2.length(); if (len1 == 0 || len2 == 0) return ""; // let dpx reprsent the longest common str of 0...x int dp = new int len1 + 1; int maxLen = 0; int endIndex = 0; for (int i = 1; i <= len1; i++) { for (int j = 1; j <= len2; j++) { if (str1.charAt(i-1) == str2.charAt(j-1)) { dpi = dpi-1 + 1; "See full answer
Software Engineer
Coding
+1 more
Asked at Media.net • 5 months ago
Closest Subarray Sum to Target.
Software Engineer
Coding
+1 more
Add answer I was asked this
Software Engineer
Coding
+1 more

🧠 Want an expert answer to a question? Saving questions lets us know what content to make next.

Develop a custom data structure with O(1) time complexity for get() and setall() operations.
Software Engineer
Coding
Add answer I was asked this
Software Engineer
Coding
Asked at Salesforce • a year ago
Given two dates, return the number of days between them.
Software Engineer
Coding
+1 more
Add answer I was asked this
Software Engineer
Coding
+1 more
Asked at Amazon • a year ago
Given an array of children’s ratings, assign at least one candy to each child so that higher-rated children get more than their neighbors, and return the minimum total candies needed.
Software Engineer
Coding
+3 more
Add answer I was asked this
Software Engineer
Coding
+3 more
Is it possible for a subclass in Python to inherit from multiple base classes?
Coding
Add answer I was asked this
Coding
How would you write a test for a coin flip function?
Coding
Add answer I was asked this
Coding
Convert Biased Coin to Fair Coin
IDE
Medium
Data Analyst
Coding
+1 more
Add answer I was asked this
Data Analyst
Coding
+1 more
Asked at LangChain • 2 months ago
Implement a SQL parser that converts raw SQL strings into programming objects or ORM primitives.
Software Engineer
Coding
Add answer I was asked this
Software Engineer
Coding
Asked at Meta • 7 months ago
Implement an in-place merge of two sorted arrays.
Software Engineer
Coding
+1 more
Add answer I was asked this
Software Engineer
Coding
+1 more
Given a large set of CSV files with thousands of paragraphs each, how would you detect duplicates within each file, and how would you scale this solution for many files?
Data Engineer
Coding
1 answer I was asked this
"My brute force approach was to read them. Give a id to each paragraph and for each token count the number of time it has appeared. If any two rows look same , it is duplicated. Further , interviewer guided me that he will do it with hashing."
Payal B. - "My brute force approach was to read them. Give a id to each paragraph and for each token count the number of time it has appeared. If any two rows look same , it is duplicated. Further , interviewer guided me that he will do it with hashing."See full answer
Data Engineer
Coding
Asked at Salesforce • a year ago
Explain polymorphism.
Software Engineer
Coding
+1 more
Add answer I was asked this
Software Engineer
Coding
+1 more
Check if two lines are parallel.
Coding
Data Structures & Algorithms
Add answer I was asked this
Coding
Data Structures & Algorithms
Interpolate Data
IDE
Medium
Coding
Add answer I was asked this
Coding
Handle Missing Data
IDE
Medium
Coding
Add answer I was asked this
Coding

Showing 401-418 of 418

Interviewed recently?

Help improve our question database (and earn karma) by telling us about your experience

+ Share interview experience

Trending companies

Coding Interview Questions

Write a function to simulate 25 coin flips with 50/50 probability. Return the number of heads.

Given an unsorted array, find duplicate elements in constant time, without using inbuilt functions of python.

Implement a string sorting algorithm, treating digits as numbers.

Given 2 strings, return the longest common substring.

Closest Subarray Sum to Target.

Develop a custom data structure with O(1) time complexity for get() and setall() operations.

Given two dates, return the number of days between them.

Given an array of children’s ratings, assign at least one candy to each child so that higher-rated children get more than their neighbors, and return the minimum total candies needed.

Is it possible for a subclass in Python to inherit from multiple base classes?

How would you write a test for a coin flip function?

Convert Biased Coin to Fair Coin

Implement a SQL parser that converts raw SQL strings into programming objects or ORM primitives.

Implement an in-place merge of two sorted arrays.

Given a large set of CSV files with thousands of paragraphs each, how would you detect duplicates within each file, and how would you scale this solution for many files?

Explain polymorphism.

Check if two lines are parallel.

Interpolate Data

Handle Missing Data

Explore questions by company

Explore questions by role