Problem database last updated: June 20, 2025
2 problems · 2 Easy, 0 Medium, 0 Hard · Ranked #432 of 458
2 Easy
100% · avg 23%
0 Medium
0% · avg 59%
0 Hard
0% · avg 18%
Based on 2 reported problems, Vanguard interviews are easier than average - only 0% Hard compared to 18% across all companies.
Compared to the industry average, Vanguard puts unusual emphasis on hash-table (100% of problems, 4.5x the industry average), string (100% of problems, 3.6x the industry average). If you're short on time, these are the categories to double down on.
The most common topics are hash-table (100%), string (100%), counting (50%). Problems below are sorted by frequency, the ones at the top are asked most often.
| Problem | Difficulty | Frequency | Topics | |
|---|---|---|---|---|
Check if the Sentence Is Pangram A pangram is a sentence where every letter of the English alphabet appears at least once. | Easy | Very Likely | hash-tablestring | Solve |
Check Whether Two Strings are Almost Equivalent Two strings word1 and word2 are considered almost equivalent if the differences between the frequencies of each letter from 'a' to 'z' between word1 and word2 i... | Easy | Very Likely | hash-tablestringcounting | Solve |
Check if the Sentence Is Pangram
SolveA pangram is a sentence where every letter of the English alphabet appears at least once.
Check Whether Two Strings are Almost Equivalent
SolveTwo strings word1 and word2 are considered almost equivalent if the differences between the frequencies of each letter from 'a' to 'z' between word1 and word2 i...
Frequency scores are based on crowdsourced interview reports. A higher score means the problem has been reported more often in recent Vanguard interviews.
Very Likely
75-100%
Likely
50-74%
Sometimes
25-49%
Rare
0-24%
Vanguard interviews focus heavily on hash-table, string, counting 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. Vanguard 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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Vanguard has been reported to ask 2 distinct coding problems. The most common topics are hash-table, string, counting. 2 are Easy difficulty, 0 are Medium, and 0 are Hard. Problems are sorted by frequency - the ones at the top are asked most often.
Based on 2 reported problems, Vanguard interviews are easier than average - only 0% Hard compared to 18% across all companies. 0% of questions are Medium difficulty. Focus on the high-frequency Medium problems first, then work through the Hard ones.
Start with the highest-frequency problems listed on this page. Focus on the core topics: hash-table, string, counting. 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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