Lawrence Livermore National Laboratory (LLNL) Defense Technologies Engineering Division - Undergraduate Intern
Livermore, CA·149 interview reviews·Medium difficulty
Defense Technologies Engineering Division - Undergraduate Intern Interview Reviews
149CodeSignal online assessment, then one 45-minute interview. Interviewer was friendly and helpful. 2 leetcode questions then 5 minutes for any questions I had. Got my results in a few days.
“Design Rate Limiter - Implement an API rate limiting system”
Just one round with 2 LC hards in 45 min. It wasn't too bad at all — if you've done a lot of LC you're gonna be fine. Make sure to check off your approach with the interviewer before you begin implementing.
“Best Time to Buy and Sell Stock - Find the maximum profit from buying and selling one share of stock”
CodeSignal online assessment, then one 45-minute interview. Interviewer was friendly and helpful. 2 leetcode questions then 5 minutes for any questions I had. Got my results in a few days.
“How do you handle tight deadlines and pressure?”
Had a recruiter screen first, then a technical round focused on system design and coding. The interviewer was very professional and walked through the problem step by step. Good overall experience.
“Two Sum - Given an array of integers and a target, return indices of the two numbers that add up to target”
Online assessment was difficult, but the final round technical was just 2 leetcode questions. Studying tagged questions and general leetcode helps a lot. Interviewer was friendly and wanted me to succeed.
“LeetCode question, difficulty was around a medium”
About This Role
Frequently Asked Questions
How hard is it to get hired as a Defense Technologies Engineering Division - Undergraduate Intern at Lawrence Livermore National Laboratory (LLNL)?
The interview difficulty is rated 3/5 by candidates. 56% report a positive experience. Focus on C/C++, Embedded Systems, Algorithms to improve your chances.
How long does the Lawrence Livermore National Laboratory (LLNL) Defense Technologies Engineering Division - Undergraduate 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. 50% of candidates applied online.
What questions are asked in a Lawrence Livermore National Laboratory (LLNL) Defense Technologies Engineering Division - Undergraduate Intern interview?
Common topics include data structures & algorithms (arrays, trees, graphs), system design, and behavioral questions using the STAR method. Practice with our AI mock interviewer to prepare.
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