IBM
Global technology and consulting firm with deep roots in enterprise IT and AI.
3 Rounds
~14 Days
Medium
The Interview Loop
Recruiter Screen (30 min)
Standard fit check, behavioral questions, and resume overview.
Technical Loop (3-4 Rounds)
Deep dive into domain knowledge, coding, and system design.
Interview Question Bank
Frontend Engineer
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Coding
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easy
Write a function that takes an array of integers and returns indices of the two numbers such that they add up to a specific target.
#Arrays
#Hash Maps
Frontend Engineer
•
Coding
•
easy
Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. This is often used to validate nested JSON structures in our cloud configurations.
#Data Structures
#Stacks
#Strings
Frontend Engineer
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Coding
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medium
Implement a function to flatten a deeply nested array. Can you do it iteratively as well as recursively?
#JavaScript
#Recursion
#Arrays
Frontend Engineer
•
Coding
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hard
Design and implement an LRU (Least Recently Used) Cache class in JavaScript. This is useful for caching frontend assets or API responses in a single-page application.
#Data Structures
#Hash Maps
#Linked Lists
Frontend Engineer
•
Coding
•
medium
Given an array of intervals where intervals[i] = [starti, endi], merge all overlapping intervals. This is used in our calendar and scheduling UI components.
#Arrays
#Sorting
Difficulty Radar
Based on recent AI-sourced data.
Meet Your Interviewers
The "Standard" Interviewer
Senior EngineerFocuses on core competencies, system constraints, and clear communication.
SimulateUnwritten Rules
Think Out Loud
Always explain your thought process before writing code or drawing architecture.