I applied through university. I interviewed at Ciena (Gurgaon, Haryana) in Nov 2025
Interview
3 Rounds - 2 tech and 1HR.
Dsa is easy level. Oops asked in depth. Easy os
Slow fast pointers
Delete node without head
Stock buy and sell 1
Focus on oops mainly and c++ basics
Interview questions [1]
Question 1
What is the Application of runtime polymorphism? Why not just create an object using child class
I applied through university. The process took 1 day. I interviewed at Ciena (Pune) in Oct 2025
Interview
1st online assessment asking core subjects
CNS OS JAVA OOP C++ 30 mcqs
3 rounds 1st Technical -Dsa and Cs fundamental
Dsa easy to medium leetcode questions
Operating system was important
Oop was asked in deep
Core computer networks question
2nd - System design
3rd - Typical Hr round questions
I applied through university. The process took 1 day. I interviewed at Ciena (New Delhi) in Oct 2025
Interview
On Campus Oppurtunity. OA consisted mostly of fundamental questions on C++, OS, CN, Linux and Aptitude. Interview consisted of basic DSA questions and strong grip on C++ (pointers, OOPs, memory management). Also my project was OS related so many questions were around my project.
Interview questions [1]
Question 1
1. DSA (mostly around array, linkedlist, strings, bit manipulation,)
2. Pointers (very imp)
3. OS
4. OOPs (again very imp)