Top 50 Python Interview Questions
The most frequently asked questions on this topic across all roles and companies, ranked by real interview frequency. Updated weekly.
Reverse a singly linked list in-place using iterative pointer manipulation.
Pearl
Rapid Ratings International
CoBankDetermine whether a string reads the same forward and backward using a two-pointer scan.
Informatica
ENGIEDDelivery Hero IndiaUse two pointers to determine whether a City National Bank reference label reads identically forward and backward.
Taboola
City National Bank
BCUUse postorder recursion to determine whether a binary tree is height-balanced in O(n) time.
Meta
Inc.
EtsyFind the longest substring with all unique characters using a sliding window.
Cohesity
Nextdoor
SnapLogicFind two indices in an array whose values add up to a target using a hash map.
Converseon
BMW of North America
RiskonnectImplement an LRU cache in O(1) average time using a hash table and doubly linked list.
Allianz
ICF
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Traverse a binary tree level by level using a queue-based breadth-first search.
Rapid Ratings International
Fujitsu
Incedo