Interview Experience – Multiple Companies (IBM, Adobe, Siemens, Microsoft)

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🔹 IBM ISDL (Bangalore) – EDA Developer Tools

🟢 Online Assessment (HackerRank)

• 2 DSA questions (Graph + DP)
• 10 MCQs

🟢 Screening Call

• Work related discussion
• Introduction and discussion on C++ and DSA
• What is this pointer in C++?
• Can we have a "virtual constructor"? If not, why?
• Can we have a "virtual destructor"? Use cases?
• When would you use "Array vs Linked List"?

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🔹 Adobe (First Attempt)

🟢 Technical Interview

• Reverse a linked list (coding)

• Output-based questions on:

  • Virtual functions
  • Inheritance

• Constructor & Destructor behavior

• Impact of using vector as an object

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🔹 Adobe Noida (Second Attempt – Jan 2026)

🟢 Round 1

• LeetCode: Insert Interval

• Design Problem:

  • Interface to fetch "next upcoming birthday"

  • Data structure involving:

    • Name
    • Parents
    • Birth date

🟢 Round 2

• Design a "Logger system"

  • Asynchronous logging
  • File logging vs console logging

🟢 Round 3

• Design a "Rate Limiter"

  • Scale from small system → millions of users
  • Follow-up on optimizations and edge cases

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🔹 Siemens Healthineers

🟢 Round 1 (1 hr 45 min)

"Coding + C++ Core Concepts"

• Reverse a string Implemention using class with:

  • Copy constructor
  • Assignment operator
  • Operator overloading

• Demonstrate "virtual functions"

• Find most frequent element in array

"Conceptual Questions"

• STL:

  • Difference between set, map, multiset
  • Use cases of vector

• When and why to use virtual keyword

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🟢 Round 2 (1.5 hrs)

"System + OS + Debugging"

• Experience with OS (Windows/Linux)

• Unit testing approach

• Debugging production issues using crash dumps

• IPC concepts

• Multithreading:

  • Mutex vs Critical Section vs Condition Variable

"Design & Principles"

• SOLID principles (with example)
• Knowledge of C#, .NET (basic discussion)

"Coding"

• Find "2nd most frequent word" in a string
• OOP implementation:
  • Abstract class
  • Inheritance
  • Operator overloading
  • File handling

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🔹 Microsoft ( Feb 2026)

🟢 Round 1 (DSA)

• Discuss a "recent bug you solved end-to-end"

• Graph problem:

  • Connected components
  • Queries on component size

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🟢 Round 2 (System Design)

• Discussion on "current work (cache systems)"

• Design a "Distributed Cache"

• Cache eviction strategies:

  • FIFO
  • LRU
  • LFU

• Implement FIFO cache

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