Top 50 validation Interview Questions
The most frequently asked validation questions across all roles and companies, ranked by real interview frequency. Updated daily.
Determine whether a bracket sequence is valid and balanced using a stack.
ChubbDetermine whether a parentheses string is balanced using a stack and linear-time scanning.
ZyngaNormalize, validate, and HTML-escape single-line user input while rejecting unsafe control characters.
Meta Logistics
Flatiron HealthValidate nested parentheses in Parsons configuration text using a stack and a single linear scan.
Parsons
Impact AnalyticsValidate a NiCE CXone-style password with a single pass over its characters and multiple policy constraints.
NiCEValidate a binary search tree using recursive range propagation and strict ordering rules.
Recursively validate Commure clinical event payloads against nested object, array, primitive, and required-field rules.
Commure
Airbus
American Express Global Business TravelValidate and apply a Scale.ai task deadline extension using status, expiration, and maximum-lifetime constraints.
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