Onto Innovation Software Engineer Intern Interview Questions (2026)
Stanhope, NJ·11 interview reviews·Medium difficulty
Software Engineer Intern Interview Reviews
11The process was pretty straightforward. It started with an online assessment, followed by a phone screen, and concluded with a final round that had two LeetCode medium difficulty problems.
“Clone Graph - Create a deep copy of an undirected graph”
The process was pretty straightforward. It started with an online assessment, followed by a phone screen, and concluded with a final round that had two LeetCode medium difficulty problems.
“Longest Substring Without Repeating Characters - Find the length of the longest substring without repeating characters”
The process was pretty straightforward. It started with an online assessment, followed by a phone screen, and concluded with a final round that had two LeetCode medium difficulty problems.
“Describe a challenging project you worked on and how you overcame obstacles”
Online assessment was tough, but the onsite technical was two standard LC-style problems. Interviewer wanted clear communication before coding.
“K Closest Points to Origin - Find K points closest to origin using Manhattan distance”
Recruiter screen, then a 45-minute coding round. Friendly interviewer. Results in a few days.
“One easy, one medium”
One round with two problems in 45 min. If you've practiced patterns you're fine — narrate your approach before you code.
“BFS/graph or linked list manipulation”
The process was pretty straightforward. It started with an online assessment, followed by a phone screen, and concluded with a final round that had two LeetCode medium difficulty problems.
“LeetCode medium — tree / graph style problem”
Straightforward — two medium leetcode-tagged problems in 45 minutes. Very fast paced so watch the clock. Short behavioral at the end.
“Array or string manipulation + one follow-up”
Straightforward — two medium leetcode-tagged problems in 45 minutes. Very fast paced so watch the clock. Short behavioral at the end.
“Array or string manipulation + one follow-up”
Online assessment was tough, but the onsite technical was two standard LC-style problems. Interviewer wanted clear communication before coding.
“Hash map + interval or sliding window style”
One round with two problems in 45 min. If you've practiced patterns you're fine — narrate your approach before you code.
“BFS/graph or linked list manipulation”
About This Role
Frequently Asked Questions
How hard is it to get hired as a Software Engineer Intern at Onto Innovation?
The interview difficulty is rated 3.4/5 by candidates. 61% report a positive experience. Emphasize Data Structures and Algorithms in your prep.
How long does the Onto Innovation Software Engineer Intern hiring process take?
The process typically takes 2–6 weeks from application to final decision, depending on the hiring cycle and team availability.
What is the interview process like?
Most candidates go through a recruiter screen, followed by technical coding rounds, and a final interview loop. 62% of candidates applied online.
What questions are asked in a Onto Innovation Software Engineer Intern interview?
Common topics include data structures & algorithms, system design for some teams, and behavioral STAR stories. Practice with our AI voice interviewer to tighten delivery.
Personalized prep in one place—your five-in-one interview workspace.
Behaviorals, technicals, system design, voice mocks, and full delivery review—personalized to your role and target company, all in one flow. Real-time feedback on clarity, pacing, and filler before you interview with Onto Innovation.
Cancel anytime. No credit card required.