Ciena Interview Experience (New Grad 2025 DEC)
Anonymous User
170
Mar 27, 2026

time (12:30 to 5:30 Offline Gurugram)
Software Engineer 1A
Questions Asked/ Topics

  • Explain your projects in depth (all design patterns used why used ?
    what was the problem we were trying to solve).
  • Stack heap depth
  • pointers and function ptrs, struct and function ptrs mix questions in great depth(real depth)
  • memory optimization of struct (internal working of compiler) due to position of members.
  • typical C type questions like unwritable string, char **, char *, string literals, why are they not editable, etc .
  • MCQ (not that tough)
  • Coding Questions (4) 1 LL, 1 Stack, 1 Queue, 1 hashing algo written from scratch ( i wrote using magic no.s), explanation of hashing in depth (asked questions about bucket size increase , etc).
  • need optimized solutions for every problem
  • asked about ASAN reports, Valgrind tool usage, gdb scenarios.
  • asked about diff b/w memory leaks , memory corruption, etc etc.

RESULT : SELECTED
ctc ~16 LPA

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