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LinkedIn Easy Interview Questions

3 easy-level practice questions for LinkedIn technical interviews

LinkedIn software engineer interviews cover algorithms, data structures, system design, and coding problems drawn from real interview rounds.

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coding Easy Verified Question #1

1. Balanced Parentheses


Category: String coding problem
Configuration files at LinkedIn are written in JSON, YAML, and HOCON formats. Malformed config files can bring down multiple services, so validators...
Input: String
Output: Printed output
coding Easy Verified Question #2

2. Active Sprint Filter


Category: Graph coding problem
A project tracking system logs team activity throughout the workday. Each log entry has the format "teamId action timestamp", where action is...
Input: Graph (nodes and edges)
Output: Printed output
coding Easy string #1

1. Valid Palindrome — Check if the string is a palindrome ignoring cases and non-alphanumeric characters

1. Background: LinkedIn deals with user-generated content, including profile summaries, messages, and posts. Ensuring that strings are processed efficiently is key for enhancing features like search and user communication.
2. Problem statement: Given a string s, write a function that checks if s is a valid palindrome. A valid palindrome reads the same backward as forward after converting all uppercase letters to lowercase and excluding all non-alphanumeric characters.
3. Function/class signature:
- def isPalindrome(s: str) -> bool:
4. Example 1:
- Input: "A man, a plan, a canal: Panama"
- Output: True
- Explanation: Alphanumeric characters only are amanaplanacanalpanama, which is a palindrome.
5. Example 2:
- Input: "race a car"
- Output: False
- Explanation: After filtering, the characters do not form a palindrome.
6. Constraints:
- 0 <= s.length <= 2 * 10^5
- s consists of printable ASCII characters.

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