Meta Data Manipulation (SQL/Python) Interview Questions
Practice 1,159 real Meta interview questions for 2026. Covers top categories — Coding & Algorithms, Analytics & Experimentation, Data Manipulation (SQL/Python), Behavioral & Leadership, and System Design — across Software Engineer, Data Scientist, Machine Learning Engineer, Data Engineer, and Product Manager roles. Real questions from actual interviews with detailed solutions. Expect a software-engineering-heavy loop: timed algorithmic coding (trees, arrays, graph/maze problems, delimiter/CSV parsing), system-design prompts like leaderboards, flight search and online-judge architectures, and an increasingly common AI-assisted coding round that mirrors real workflows. Data Scientist rounds emphasize product analytics and experimentation—designing tests, diagnosing spend drops and bots, evaluating unconnected content, and writing SQL for multi-account, seller, and vehicle metrics. Machine Learning Engineer questions skew toward recommender and ranking work (place and friend recommendation, sparse-matrix ops, linear-regression derivations, newsfeed dislike models). Data Engineers focus on data modeling, ETL, capacity calculations, reservations/utilization queries, and production SQL/Python tasks. For interview preparation, prioritize timed coding practice, system-design templates, rigorous SQL drills (joins/CTEs/aggregation), clear A/B-testing frameworks, and concise STAR behavioral stories tied to measurable impact.
"I got asked a hardcore MCM DP question and I saw it on PracHub as well. Solved that question in 5 minutes. Without PracHub I doubt I could solve it in 5 hours. Though somehow didn't get hired, perhaps I guess I solved it too fast? /s"
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"10 years of experience but never worked at a top company. PracHub's senior-level questions helped me break into FAANG at 35. Age is just a number."
"I was skeptical about the 'real questions' claim, so I put it to the test. I searched for the exact question I got grilled on at my last Meta onsite... and it was right there. Word for word."
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"I've used LC, Glassdoor, and random Discords. Nothing comes close to the accuracy here. The questions are actually current — that's what got me. Felt like I had a cheat sheet during the interview."
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"Literally just signed a $600k offer. I only had 2 weeks to prep, so I focused entirely on the company-tagged lists here. If you're targeting L5+, don't overthink it."
"Coaches and bootcamp prep courses cost around $200-300 but PracHub Premium is actually less than a Netflix subscription. And it landed me a $178K offer."
"I honestly don't know how you guys gather so many real interview questions. It's almost scary. I walked into my Amazon loop and recognized 3 out of 4 problems from your database."
"Discovered PracHub 10 days before my interview. By day 5, I stopped being nervous. By interview day, I was actually excited to show what I knew."
"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."
"The search is what sold me. I typed in a really niche DP problem I got asked last year and it actually came up, full breakdown and everything. These guys are clearly updating it constantly."
Solve LeetCode stack and tree problems
Question LeetCode 1249. Minimum Remove to Make Valid Parentheses LeetCode 863. All Nodes Distance K in Binary Tree https://leetcode.com/problems/minim...
Handle palindrome & decimal addition
Question LeetCode 266. Palindrome Permutation Given two non-negative decimal number strings, implement addition that supports a decimal point. https:/...
Find integer in most intervals
Question Given N integer intervals [ai, bi] (positive integers), find an integer that belongs to the maximum number of intervals (return any such inte...
Check tree nodes equal subtree average
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Solve various LeetCode data-structure questions
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Solve three LeetCode coding problems
Question LeetCode 1249. Minimum Remove to Make Valid Parentheses LeetCode 827. Making A Large Island LeetCode 199. Binary Tree Right Side View https:/...
Compute product of array except self
Given an integer array nums, return an array out where out[i] equals the product of all elements in nums except nums[i]. Do it in O(n) time using cons...
Find posts with >60s unconnected viewing time
Context You work on a social app where users can view posts. A view can be from a connected user (viewer is friends/connected with the post author) or...
Compute longest increasing path in a matrix
Compute longest increasing path in a matrix Given an m × n integer matrix, return the length of the longest path of strictly increasing values, where ...
Evaluate expression without stack, constant space
Evaluate expression without stack, constant space Given a string s representing a valid arithmetic expression of non-negative integers, the operators ...
Find k most frequent elements, discuss O(n)
Find k most frequent elements, discuss O(n) Given an integer array nums of length n and an integer k (where 1 ≤ k ≤ the number of distinct values in n...
Traverse levels selecting nodes meeting a predicate
Traverse levels selecting nodes meeting a predicate Given the root of a binary tree and a predicate P(value) that returns true for certain node values...
Solve increasing sequence and path problems
Solve increasing sequence and path problems Answer the following related tasks about increasing sequences and paths: a) Contiguous subarray: Given an ...
Remove adjacent duplicate groups repeatedly
Remove adjacent duplicate groups repeatedly Given a string s, repeatedly delete any maximal contiguous group of identical characters whose length is a...
Produce asymmetric side views of a binary tree
Produce asymmetric side views of a binary tree Given a binary tree, output two sequences: ( 1) Left-bottom-up view: for each depth, the first node vis...
Implement range-sum tree and sort merged lists
Implement range-sum tree and sort merged lists 1) Given a binary tree whose nodes store integer values, and two integers low and high defining an incl...
Write SQL for library analytics
Given a library database, write SQL to answer the following: 1) Count the number of books that are currently not returned (i.e., still checked out) an...
Write SQL and Python for data prep
Given clickstream events (user_id, event_type, ts, properties) and a users table (user_id, signup_ts, plan), write SQL to compute DAU/WAU/MAU, D1/W1 r...
Maximize number with one digit swap
Maximize number with one digit swap Given a non-negative integer n (as an int or string), perform at most one swap of two digits to produce the maximu...
Implement weighted random index picker
Implement weighted random index picker Design a class WeightedPicker that is initialized with an array of positive integer weights w and supports pick...