Coding questions
Linkedin Online Assessment
Overview
Here is how public prep guides and student write-ups describe the LinkedIn online assessment. This is not an official company brochure.
Product bar; limited India-specific sectional public dumps in this pass.
Usual selection rounds
Rounds students usually mention: Online assessment / coding → Technical interviews (DSA + system design as level requires) → Behavioral
| Item | From student reports |
|---|---|
| Platform | Varies by drive |
| Online test summary | India new-grad/campus public transcripts are fewer than FAANG mega-threads. Expect coding OA and multi-round DSA/behavioral similar to large product companies; confirm recruiter mail. |
| Eligibility notes | Drive-specific - confirm notification |
| Branches (reported) | Confirm notification |
Online test sections
Section-level detail not verified in our source set yet - use the placement email / official PDF.
Extra notes from sources
- Public fresher sectional counts are sparse; check your college placement email or official notification for exact section counts.
Sample practice question styles
These are practice questions for speed - not claimed to be from a real LinkedIn live paper.
Coding Q1: Check prime
Problem: Write a function that returns true if n is prime and false otherwise. Handle n < 2 correctly.
Approach: Return false for n < 2. Trial-divide from 2 to floor(sqrt(n)). If any divisor divides n evenly, it is composite; otherwise prime.
Complexity: O(√n) time
LinkedIn tip: Restate the problem, sketch a brute-force idea, then tighten it. Call out edge cases (empty input, single element, overflow) before you write code.
Coding Q2: Valid parentheses
Problem: Given a string containing only ‘()[]’, decide whether the brackets are balanced and correctly nested.
Approach: Scan left to right with a stack. Push opening brackets. On a closing bracket, the stack top must be the matching opener. At the end the stack must be empty.
Complexity: O(n) time, O(n) space
LinkedIn tip: Restate the problem, sketch a brute-force idea, then tighten it. Call out edge cases (empty input, single element, overflow) before you write code.
Coding Q3: Two Sum
Problem: Given an array of integers and a target, return indices of two numbers that add up to the target. Assume exactly one solution and you may not use the same element twice.
Approach: Walk the array once. For each value x, check whether target − x was seen earlier in a hash map of value → index. If yes, return both indices; else store x.
Complexity: O(n) time, O(n) space
LinkedIn tip: Restate the problem, sketch a brute-force idea, then tighten it. Call out edge cases (empty input, single element, overflow) before you write code.
Coding Q4: Longest substring without repeating characters
Problem: Given a string s, find the length of the longest substring without repeating characters. Example: ‘abcabcbb’ → 3 (‘abc’).
Approach: Sliding window with a map (or last-seen index) of characters. Expand the right pointer; when a duplicate appears inside the window, move the left pointer past the previous occurrence.
Complexity: O(n) time
LinkedIn tip: Restate the problem, sketch a brute-force idea, then tighten it. Call out edge cases (empty input, single element, overflow) before you write code.
Prep tips from those student reports
- LeetCode mediums
- Behavioral stories
Sources
- LinkedIn Engineering careers (other)
These notes come from public reports and can differ by campus, year, and role. If your college placement email or the official careers/notification PDF says something different, follow that.