Facebook Programming Interview Questions

Follow Us! We publish exclusive firsthand interview questions!

Newest Facebook Programming Interview Questions 2020:

Free Latest Facebook Programming Interview Questions

Leave your Email to get the latest Facebook interview questions weekly. No spam we promise.

We'll never share your email with anyone else.

Given two lists of intervals, each interval denoted as [start, end], find the intersection (overlapped segments) between the lists...

Given the bank currency exchange rate table, find out the best currency exchange rate from currency A ...

Given the bank currency exchange rate table, find out if it’s possible to exchange from currency ...

Given an array of numbers, remove the increasing sequences until there is no change.

Print elements in 2d array diagonally.

The expected output is ...

Based on an array char[] order which defines a custom order of characters, find if the list of strings is sorted increasingly by the custom order.

Given an array of numbers [1, 2, 3, 1, 4, 2, ..... ]. (Notice there could be duplicate) Also given an integer N, which means two same numbers must be N space away. 
You are going to write a program to find out a way to padding zeros to these numbers with the minimum total length...

Facebook Phone Interview Questions 2019
Sort Strings Based on Custom Alphabet Order
Decode String
Find Leftmost 0 in Sorted 2D Array
Get Product of Array Except Self
Find Sum of Columns in Binary Tree | Binary Tree Vertical Order Traversal Sum
Build String with Words in Dictionary

1.1 Schedule Tasks
1.2 Binary Tree Max Path Sum
1.3 Sort two Strings

Given many coins of 3 different face values, print the combination sums of the coins up to 1000. Must be printed in order.

eg: coins(10, 15, 55)

# There's a room with a TV and people are coming in and out to watch it. The TV is on only when there's at least a person in the room.
# For each person that comes in, we record the start and end time. We want to know for how long the TV has been on. In other words:
# Given a list of arrays of time intervals, write a function that calculates the total amount of time covered by the intervals.
# For example:
# input = [(1,4), (2,3)]
# > 3
# input = [(4,6), (1,2)]
# > 3
# input = {{1,4}, {6,8}, {2,4}, {7,9}, {10, 15}}
# > 11

Given many coins of 3 different face values, print the combination sums of the coins up to 1000. Must be printed in order.

Implement a ring buffer

Give a binary tree, find if it's possible to cut the tree into two halves of equal sum. You can only cut one edge.

Given a Binary Search Tree (BST) with root node root, and a target value V, split the tree into two subtrees where one subtree has nodes that are all smaller or equal to the target value, while the other subtree has all nodes that are greater than the target value. It's not necessarily the case that the tree contains a node with value V.

Find whether string S is periodic. Periodic indicates S = nP. e.g. S = "ababab", then n = 3, and P = "ab" S = "xxxxxx", then n = 1, and P = "x" S = "aabbaaabba", then n = 2, and P = "aabba" follow up: Given string S, find out the P (repetitive pattern) of S.

In the following, every capital letter represents some hexadecimal digit from 0 to f.
The red-green-blue color "#AABBCC" can be written as "#ABC" in shorthand.  For example, "#15c" is shorthand for the color "#1155cc".
Now, say the similarity between two colors "#ABCDEF" and "#UVWXYZ" is -(AB - UV)^2 - (CD - WX)^2 - (EF - YZ)^2.
Given the color "#ABCDEF", return a 7 character color that is most similar to #ABCDEF, and has a shorthand (that is, it can be represented as some "#XYZ"

We are given an array A of positive integers, and two positive integers L and R (L <= R). Return the number of (contiguous, non-empty) subarrays such that the value of the maximum array element in that subarray is at least L and at most R.

In the array {1, 6, 3, 5, 9, 7}, the longest arithmetic sequence is 1, 3, 5, and 7

Facebook On-site 1st Round: Behavioral + longest consecutive sequence. Can be solved with map in O(n) time.

Facebook Senior Engineer On-site There was no phone interview. Got to the onsite directly. It’s the second time interviewing at Facebook. Last year I got the feedback ‘Good coding though will hope for better design skills’. The position is senior level so no offer. A year later they came to me...

Most Frequently Asked Facebook Programming Interview Questions
  • LeetCode Easy

    38 Count and Say
    209 Minimum Size Subarray Sum
    80 Remove Duplicates from Sorted Array II
    252 Meeting Rooms
    78 Subsets
    67 Add Binary
    261 Graph Valid Tree
    275 H-Index II
    278 First Bad Version
    211 Add and Search Word - Data structure design
    Excel Sheet Column Title
    Binary Search Tree Iterator
    200 Number of Islands
    125 Valid Palindrome
    283 Move Zeroes
    117 Populating Next Right Pointers in Each Node II
    274 H-Index
    79 Word Search
    Increasing Triplet Subsequence
    49 Group Anagrams
    Walls and Gates
    50 Pow(x, n)
    311 Sparse Matrix Multiplication
    98 Validate Binary Search Tree
    Read N Characters Given Read4
    277 Find the Celebrity
    71 Simplify Path
    90 Subsets II
    325 Maximum Size Subarray Sum Equals k
    Binary Tree Level Order Traversal
    69 Sqrt(x)
    221 Maximal Square
    257 Binary Tree Paths
    236 Lowest Common Ancestor of a Binary Tree
    121 Best Time to Buy and Sell Stock
    234 Palindrome Linked List
    Remove Duplicates from Sorted Array
    88 Merge Sorted Array
    238 Product of Array Except Self
    33 Search in Rotated Sorted Array
    208 Implement Trie (Prefix Tree)
    43 Multiply Strings
    235 Lowest Common Ancestor of a Binary Search Tree
    314 Binary Tree Vertical Order Traversal
    161 One Edit Distance
    Decode Ways
    Valid Parentheses
    13 Roman to Integer
    127 Word Ladder
    Merge Intervals
    75 Sort Colors
    28 Implement strStr()
    285 Inorder Successor in BST
    215 Kth Largest Element in an Array
    133 Clone Graph
    Word Break
    206 Reverse Linked List
    15 3Sum
    Letter Combinations of a Phone Number
    1 Two Sum
    210 Course Schedule II
    341 Flatten Nested List Iterator
    377 Combination Sum IV
    398 Random Pick Index
    404 Sum of Left Leaves
    Meeting Rooms II
    Insert Delete GetRandom O(1)
    477 Total Hamming Distance
    461 Hamming Distance
    494 Target Sum
    525 Contiguous Array
    523 Continuous Subarray Sum
    535 Encode and Decode TinyURL
    543 Diameter of Binary Tree
    554 Brick Wall
    572 Subtree of Another Tree
    578 Get Highest Answer Rate Question
    602 Friend Requests II: Who Has the Most Friends
    597 Friend Requests I: Overall Acceptance Rate
    621 Task Scheduler
    637 Average of Levels in Binary Tree
    Exclusive Time of Functions
    653 Two Sum IV - Input is a BST
    670 Maximum Swap
    674 Longest Continuous Increasing Subsequence
    673 Number of Longest Increasing Subsequence
    680 Valid Palindrome II
    647 Palindromic Substrings
    Best Time to Buy and Sell Stock with Transaction Fee
    721 Accounts Merge
    Number Of Corner Rectangles
    764 Largest Plus Sign
    785 Is Graph Bipartite?
    784 Letter Case Permutation
    268 Missing Number
    801 Minimum Swaps To Make Sequences Increasing
    824 Goat Latin
    825 Friends Of Appropriate Ages
    394 Decode String

  • LeetCode Hard

    265 Paint House II
    Remove Invalid Parentheses
    25 Reverse Nodes in k-Group
    Merge k Sorted Lists
    158 Read N Characters Given Read4 II - Call multiple times
    85 Maximal Rectangle
    57 Insert Interval
    128 Longest Consecutive Sequence
    273 Integer to English Words
    297 Serialize and Deserialize Binary Tree
    10 Regular Expression Matching
    218 The Skyline Problem
    269 Alien Dictionary
    146 LRU Cache
    Expression Add Operators
    68 Text Justification
    Split Array Largest Sum
    Wildcard Matching
    76 Minimum Window Substring
    639 Decode Ways II
    Design Search Autocomplete System
    689 Maximum Sum of 3 Non-Overlapping Subarrays
    745 Prefix and Suffix Search

More Facebook Interview Questions On The Way
Airbnb Coding Interview Questions
Google Coding Interview Questions
Facebook Coding Interview Questions
Amazon Coding Interview Questions
Linkedin Coding Interview Questions
Uber Coding Interview Questions