Zscaler

Role: Developer C Intern

College: Not Specified

Interview Date: Not Specified

Interview Type: Internship

Result: Not Specified

Difficulty: Not Specified

Rounds: 3 rounds

Topics Asked: Data Structures (HashMaps, Trie, Heaps, DP), Algorithms (LIS concepts, Merge Intervals, Longest Common Subsequence), C language (Pointers), Operating Systems, Computer Networks.

Experience:

This interview experience for a Developer C Intern role involved three distinct rounds.

Round 1: Online Assessment

• Questions: Implementation-based problems requiring HashMaps, Trie data structure, Greedy approach (using Heaps), and Dynamic Programming (DP) based on Longest Increasing Subsequence (LIS) concepts.

Round 2: Interview 1

This round focused heavily on the C language.

• Questions: Primarily about C language, especially pointers.
• Coding Problems: "Find element having odd frequency" (a common LeetCode problem), "Find sum of all divisors of GCD of array elements", and "Merge Intervals" (another LeetCode problem).

Round 3: Interview 2

This round covered core computer science subjects and another coding challenge.

• Questions: 10-15 questions each on Operating Systems, Computer Networks, and C Programming Language.
• Coding Problem: "Longest Common Subsequence of 2 strings" (a well-known LeetCode problem).