Practice Interview Questions
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Twitter
Histogram of Tweets
LinkedIn
Data Science Skills
Facebook
Page With No Likes
Tesla
Unfinished Parts
New York Times
Laptop vs. Mobile Viewership
Average Post Hiatus (Part 1)
Microsoft
Teams Power Users
Linkedin
Duplicate Job Listings
Robinhood
Cities With Completed Trades
Amazon
Average Review Ratings
App Click-through Rate (CTR)
TikTok
Second Day Confirmation
IBM
IBM db2 Product Analytics
JPMorgan Chase
Cards Issued Difference
Alibaba
Compressed Mean
CVS Health
Pharmacy Analytics (Part 1)
Pharmacy Analytics (Part 2)
Pharmacy Analytics (Part 3)
UnitedHealth
Patient Support Analysis (Part 1)
Uber
User's Third Transaction
FAANG
Second Highest Salary
Snapchat
Sending vs. Opening Snaps
Tweets' Rolling Averages
Highest-Grossing Items
Top Three Salaries
Spotify
Top 5 Artists
Signup Activation Rate
Supercloud Customer
Google
Odd and Even Measurements
Walmart
Histogram of Users and Purchases
Compressed Mode
Card Launch Success
Verizon
International Call Percentage
Patient Support Analysis (Part 2)
Active User Retention
Wayfair
Y-on-Y Growth Rate
Maximize Prime Item Inventory
Median Google Search Frequency
Advertiser Status
McKinsey
3-Topping Pizzas
Stripe
Repeated Payments
Oracle
Who Made Quota?
Server Utilization Time
Bloomberg
FAANG Stock Min-Max (Part 1)
Zomato
Swapped Food Delivery
Well Paid Employees
Department vs. Company Salary
Easy
0/21
Medium
0/17
Hard
0/9
Percentage Calculations7
Joins11
Array Functions1
bball0
Date-Time Functions13
Mathematical Functions9
fun-run0
Aggregate Functions36
Ace the Data Science Interview15
Data Type Conversion13
Data Generation Functions0
Window Functions12
The-Office-SQL0
Set Operations2
Null Handling5
Conditional Expression17
Top N Results6
Control Flow Functions1
Arithmetic Operators3
Existence Check3
Conditional Logic11
Common Table Expressions (CTE) or Subquery17
String Functions2
Distinct and Unique Handling9
User Behavior6