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Top 50 frequency count Interview Questions

The most frequently asked frequency count questions across all roles and companies, ranked by real interview frequency. Updated daily.

50questions
~18htotal time
102companies covered
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1
Hash TablesStart here. 11 questions · ~237 min
First Non-Repeated CharacterEasy
Practice
Recently asked

Use a hash table frequency count and a second pass to return the first non-repeated character in a string.

Hash Tablesfrequency countStringsSynchrony FinancialItlize GlobalInteractive Process Technology
Character Frequency in StringEasy
Practice
Recently asked

Count character occurrences in a string using a hash table in linear time.

Hash Tablesfrequency countStringsSteelcaseApplied Data FinanceNiCE
Anagram Check CodingEasy
Practice
Recently asked

Determine whether two DELFI identifier strings are anagrams using character frequency counting.

Hash Tablesfrequency countStringsSLBArcesiumPrutech Solutions
Anagram Check ProgramEasy
Practice
Recently asked

Determine whether two lowercase strings are anagrams by comparing their character frequencies in linear time.

Hash Tablesfrequency countStringsWiproMedline IndustriesOneTrust
Check Palindrome RearrangementEasy
Practice

Use character frequency parity to determine whether a string can be rearranged into a palindrome.

Hash Tablesfrequency countStringsNokiaGoodLeap
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2
aggregation9 questions · ~194 min
Most Frequent CharacterMedium
Practice

Count characters across multiple strings and return the most frequent one with deterministic tie-breaking.

aggregationfrequency countArraysCapgemini Government SolutionsIBS SoftwareCapgemini FSSBU
Character Frequency and First IndexMedium
Practice

Use a single dictionary pass to record each character's frequency and earliest index.

aggregationfrequency countstring manipulationBBCGBoston Consulting Group
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3
frequency count23 questions · ~495 min
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4
More topics7 questions · ~151 min
Top IPs from Server LogsEasy
Practice

Count IP frequencies from log lines with a hash map and return the top 10 using sorting by count and lexicographic tie-break.

bashfrequency countpythonRenderAsana SpaAkamai
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