Learning Technology Specialist Interview Questions

2,990 learning technology specialist interview questions shared by candidates

Given a string s, find the length of the longest substring without duplicate characters. Example 1: Input: s = "abcabcbb" Output: 3 Explanation: The answer is "abc", with the length of 3. Note that "bca" and "cab" are also correct answers. Example 2: Input: s = "bbbbb" Output: 1 Explanation: The answer is "b", with the length of 1. Example 3: Input: s = "pwwkew" Output: 3 Explanation: The answer is "wke", with the length of 3. Notice that the answer must be a substring, "pwke" is a subsequence and not a substring.
avatar

Machine Learning Engineer

Interviewed at Drivetrain

4.6
Dec 10, 2025

Given a string s, find the length of the longest substring without duplicate characters. Example 1: Input: s = "abcabcbb" Output: 3 Explanation: The answer is "abc", with the length of 3. Note that "bca" and "cab" are also correct answers. Example 2: Input: s = "bbbbb" Output: 1 Explanation: The answer is "b", with the length of 1. Example 3: Input: s = "pwwkew" Output: 3 Explanation: The answer is "wke", with the length of 3. Notice that the answer must be a substring, "pwke" is a subsequence and not a substring.

Viewing 2001 - 2010 interview questions

Glassdoor has 2,990 interview questions and reports from Learning technology specialist interviews. Prepare for your interview. Get hired. Love your job.