Top 50 Strings Interview Questions
The most frequently asked Strings questions across all roles and companies, ranked by real interview frequency. Updated daily.
Use a hash map to find two array elements that sum to a target in O(n) time.
iCapital
Paycom
Blend360Find the longest substring with all unique characters using a sliding window.
DeepInstinct
Taboola
EDF RenewablesUse a sliding window and hash map to find the longest substring without repeated characters in a string.
Insight Global
O'Reilly Media
AvisoImplement shape classes using abstraction, encapsulation, inheritance, and polymorphism to calculate total area.
bet365
Fisglobal
AFL TelecommunicationsSign up to see every question
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Use a two-pointer string scan to determine whether a string reads the same forward and backward.
Dsv Air & Sea
Lucid Motors
AfterqueryUse two pointers to determine whether a City National Bank reference label reads identically forward and backward.
Taboola
SharpSpring
HalliburtonFormat a concise response listing programming languages and the reason for comfort with each.
Foundation Medicine
Franklin Energy
CenterWell