How often are these problems asked?
Frequency scores are based on crowdsourced interview reports. A higher score means the problem has been reported more often in recent Bolt interviews.
Very Likely
75-100%
Likely
50-74%
Sometimes
25-49%
Rare
0-24%
Problem database last updated: June 20, 2025
B
Bolt Coding Interview Questions
7 problems · 5 Easy, 1 Medium, 1 Hard · Ranked #181 of 458
Difficulty breakdown
5 Easy
71% · avg 23%
1 Medium
14% · avg 59%
1 Hard
14% · avg 18%
Top topics
array
42.9%
dynamic-programming
42.9%2.2x
string
42.9%1.5x
hash-table
28.6%
counting
14.3%4.3x
sliding-window
14.3%3x
Interview profile
Based on 7 reported problems, Bolt interviews are in line with industry averages - 14% Hard vs 18% overall.
Compared to the industry average, Bolt puts unusual emphasis on dynamic-programming (42.9% of problems, 2.2x the industry average), string (42.9% of problems, 1.5x the industry average). If you're short on time, these are the categories to double down on.
The most common topics are array (42.9%), dynamic-programming (42.9%), string (42.9%), hash-table (28.6%). Problems below are sorted by frequency, the ones at the top are asked most often.
All 7 problems
| Problem | Difficulty | Frequency | Topics | |
|---|---|---|---|---|
Best Time to Buy and Sell Stock You are given an array prices where prices[i] is the price of a given stock on the ith day. | Easy | Very Likely | arraydynamic-programming | Solve |
Check if All Characters Have Equal Number of Occurrences Given a string s, return true if s is a good string, or false otherwise. | Easy | Very Likely | hash-tablestringcounting | Solve |
Find All Anagrams in a String Given two strings s and p, return an array of all the start indices of p's anagrams in s. You may return the answer in any order. | Medium | Very Likely | hash-tablestringsliding-window | Solve |
Best Time to Buy and Sell Stock III You are given an array prices where prices[i] is the price of a given stock on the ith day. | Hard | Likely | arraydynamic-programming | Solve |
Two Sum Given an array of integers nums and an integer target, return the indices of the two numbers that add up to target. | Easy | Likely | arrayhash-map | Solve |
Valid Parentheses Given a string s containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. | Easy | Likely | stringstack | Solve |
Climbing Stairs You are climbing a staircase. It takes n steps to reach the top. | Easy | Likely | mathdynamic-programmingmemoization | Solve |
Best Time to Buy and Sell Stock
SolveYou are given an array prices where prices[i] is the price of a given stock on the ith day.
EasyVery Likely
arraydynamic-programming
Check if All Characters Have Equal Number of Occurrences
SolveGiven a string s, return true if s is a good string, or false otherwise.
EasyVery Likely
hash-tablestringcounting
Find All Anagrams in a String
SolveGiven two strings s and p, return an array of all the start indices of p's anagrams in s. You may return the answer in any order.
MediumVery Likely
hash-tablestringsliding-window
Best Time to Buy and Sell Stock III
SolveYou are given an array prices where prices[i] is the price of a given stock on the ith day.
HardLikely
arraydynamic-programming
Two Sum
SolveGiven an array of integers nums and an integer target, return the indices of the two numbers that add up to target.
EasyLikely
arrayhash-map
Valid Parentheses
SolveGiven a string s containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid.
EasyLikely
stringstack
Climbing Stairs
SolveYou are climbing a staircase. It takes n steps to reach the top.
EasyLikely
mathdynamic-programmingmemoization
Preparing for your Bolt coding interview
Bolt interviews focus heavily on array, dynamic-programming, string problems. If you're short on time, these are the categories to prioritize. The problems on this page are sorted by frequency, so start from the top and work your way down.
Beyond solving problems, practice explaining your approach. Bolt interviewers care about your thought process - how you break down a problem, consider edge cases, and evaluate tradeoffs between solutions. A clean O(n) solution you can explain clearly beats an O(log n) solution you can't articulate.
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Frequently Asked Questions
What coding problems does Bolt ask in interviews?add
Bolt has been reported to ask 7 distinct coding problems. The most common topics are array, dynamic-programming, string. 5 are Easy difficulty, 1 are Medium, and 1 are Hard. Problems are sorted by frequency - the ones at the top are asked most often.
How hard are Bolt coding interviews?add
Based on 7 reported problems, Bolt interviews are in line with industry averages - 14% Hard vs 18% overall. 14% of questions are Medium difficulty. Focus on the high-frequency Medium problems first, then work through the Hard ones.
How should I prepare for a Bolt coding interview?add
Start with the highest-frequency problems listed on this page. Focus on the core topics: array, dynamic-programming, string. Practice solving them under time pressure and explaining your approach out loud. Mock interviews with AI can simulate the real experience.
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