Tech Interview Questions

Practice 9,581+ interview questions from top companies including Google, Meta, Amazon, and more. Filter by company, role, and category.

Popular Interview Questions

Interview Questions

Practice the exact questions companies are asking right now.

9.6k Questions 505 Companies08.05.2026
Showing 20 results
Role
Meta logo
Meta
Medium
Data Scientist

Calculate Weekly Thread Engagement with Reactions in SQL

messages +------------+--------+----------+--------------+---------------------+ | message_id | sender | receiver | has_reaction | timestamp ...

Data Manipulation (SQL/Python)
79
0
191 people solved
Jul 12, 2025
Meta logo
Meta
Medium
Data Scientist

Calculate Total Interactions for Each Product

Interactions +----------+-----------+------------+--------------+ | buyer_id | seller_id | product_id | interactions | +----------+-----------+-------...

Data Manipulation (SQL/Python)
56
0
181 people solved
Jul 12, 2025
Google logo
Google
Medium
Data Scientist

Analyze User Flags and Review Outcomes for Moderation Prioritization

UserFlags +---------------+--------------+----------+---------+ | User_FirstName| User_LastName| Video_ID | Flag_ID | +---------------+--------------+...

Data Manipulation (SQL/Python)
100
0
343 people solved
Jul 12, 2025
Meta logo
Meta
Medium
Data Scientist

Calculate Weekly CTR and Campaign-Specific CTR in SQL

AdEvents ad_id | campaign_id | event | view_id | event_date 1 | 10 | impression | 123 | 2023-11-07 1 | 10 | cli...

Data Manipulation (SQL/Python)
66
2
244 people solved
Jul 12, 2025
Meta logo
Meta
Medium
Data Scientist

Calculate Average Session Length and Compare App Performance

user_sessions +---------+------------+------------+---------------------+---------------------+ | user_id | session_id | app | session_start ...

Data Manipulation (SQL/Python)
125
0
324 people solved
Jul 12, 2025
Amazon logo
Amazon
Medium
Data Scientist

Identify Top Spenders and Segment Customers Using Python

orders +----------+---------+------------+----------+--------------+-------------------+ | order_id | cust_id | order_date | product | order_amount |...

Data Manipulation (SQL/Python)
76
0
10 people solved
Jul 12, 2025
Amazon logo
Amazon
Medium
Data Scientist

Explore Subscription Patterns and Status Transitions with SQL/Pandas

subscriptions +-----------------+---------+-------------+ | subscription_id | status | status_date | +-----------------+---------+-------------+ | 10...

Data Manipulation (SQL/Python)
67
0
7 people solved
Jul 12, 2025
Meta logo
Meta
Medium
Data Scientist

Analyze Recent Post Performance Using SQL Queries

INFO_STREAM_VIEWS +---------+-----------+--------------+----------+------------+ | post_id | viewer_id | relationship | duration | ds | +-----...

Data Manipulation (SQL/Python)
41
1
6 people solved
Jul 12, 2025
Google logo
Google
Medium
Data Scientist

Implement Sampling and Minimize Loss in Numerical Coding

Scenario Numerical coding challenges on sampling and loss minimization. Question a) Implement functions to sample from truncated normal distributions ...

Coding & Algorithms
24
0
91 people solved
Jul 12, 2025
Meta logo
Meta
Medium
Data Scientist

Calculate Recent Post Views and Reactions for Social Media

info_stream_views +---------+-----------+--------------+----------+------------+ | post_id | viewer_id | relationship | duration | ds | +-----...

Data Manipulation (SQL/Python)
87
0
320 people solved
Jul 12, 2025
Meta logo
Meta
Medium
Data Scientist

Analyze Group Call Adoption Using SQL Queries

CALL_LOGS | call_id | user_id | call_start | call_end | is_group_call | participant_cnt | | 101 | 12 | 2023-08-01 10:00...

Data Manipulation (SQL/Python)
153
1
246 people solved
Jul 12, 2025
Amazon logo
Amazon
Medium
Data Scientist

Calculate Weekly, Monthly Watch Hours for Paid Users

video_view_logs +---------+----------+----------------+------------+------------+ | user_id | video_id | watched_seconds| watch_date | device_type| +-...

Data Manipulation (SQL/Python)
87
0
211 people solved
Jul 12, 2025
Meta logo
Meta
Hard
Data Scientist

Analyze Free Shuttle Impact on Employee Participation Rates

Analyze Free Shuttle Impact on Employee Participation Rates You have panel data for more than 1,000 company sites over time. Some sites adopt free shu...

Analytics & Experimentation
104
0
247 people solved
Jul 12, 2025
Meta logo
Meta
Medium
Data Scientist

Analyze New Shops' Activity Compared to Existing Ones

shops +---------+------------+---------------+ | shop_id | created_at | category | +---------+------------+---------------+ | 1 | 2024-01-0...

Data Manipulation (SQL/Python)
53
0
8 people solved
Jul 12, 2025
TikTok logo
TikTok
Medium
Data Scientist

Optimize Job Routing in Parallel Machine Scheduling

Scenario In the Production Factory game, jobs with varying processing times arrive and must be routed through two parallel machines to minimize total ...

Coding & Algorithms
23
0
44 people solved
Jul 12, 2025
Meta logo
Meta
Medium
Data Scientist

Determine Old vs. New Users' Shop Visibility Changes

SHOP_VISIBILITY_HISTORY +----------+----------------+---------------------+-------------------+---------+ | user_id | user_signup_dt | action_timesta...

Data Manipulation (SQL/Python)
61
0
5 people solved
Jul 12, 2025
Meta logo
Meta
Easy
Data Scientist

Expected impressions per user under random assignment

Random Assignment of Ad Impressions Across Users In an A/B experiment, Y ad impressions are served uniformly at random across X distinct users. Each i...

Analytics & Experimentation
14
0
31 people solved
Jul 12, 2025
PayPal logo
PayPal
Medium
Data Scientist

Describe Leading Without Authority in Data Management

Behavioral Interview: Leading Without Authority in Data Management You will be assessed on cultural fit and how you operate in ambiguous, messy data e...

Behavioral & Leadership
30
0
75 people solved
Jul 12, 2025
TikTok logo
TikTok
Medium
Data Scientist

Compute Averages of Unique Numbers in Dictionary Lists

Scenario Python tech screen: given a dictionary mapping keys to numeric lists, e.g., {'a':[1,2,1],'b':[1,2,3]}, compute the average of each list after...

Coding & Algorithms
24
0
46 people solved
Jul 12, 2025
Amazon logo
Amazon
Medium
Business Intelligence Engineer

Identify Top-Buying Customers Daily with SQL Query

PRIME +-------------+------------+----------+ | Customer_ID | Start_Date | End_Date | +-------------+------------+----------+ | 1 | 2025-01-...

Data Manipulation (SQL/Python)
16
0
28 people solved
Jul 12, 2025