Top 50 implementation Interview Questions
The most frequently asked implementation questions across all roles and companies, ranked by real interview frequency. Updated daily.
Implement cosine similarity for two numeric vectors using dot product and vector norms.
Clickhouse
Socure
EXL ServiceImplement FIFO queue operations using two stacks while preserving enqueue, dequeue, peek, and empty-check behavior.
Hsbc
Gro Intelligence
Continental FinanceBuild a singly linked list from scratch with insertion, deletion, lookup, and traversal operations.
Netskope
Intel
Je Technology SolutionsDetermine whether two MSCI labels are anagrams by comparing character frequencies in linear time.
Adani Digital Labs
MicrosoftImplement a custom integer-key HashMap with chaining, resizing, updates, lookups, and deletion without using dictionaries or sets.
Canva
ZomatoImplement LIFO push, pop, and top operations for a 24]7.ai conversation history using a stack.
[24]7.ai
LeverParse a command string into tokens while preserving quoted text and interpreting backslash escapes.
GoogleCompute a valid one-dimensional convolution by reversing the kernel and sliding it across an input signal.
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