This was a video call interview, and the interviewer was very professional and polite.

I applied for a C++ developer profile in the Telecom Domain.

The interview was not tough, but I failed to communicate my answers well.

How do telecom operators know when a customer has reached their credit limit and when to stop services?

How does an Account Receivables System work (overview only, not in detail)?

Explain the system design of a "Shared Printer machine in an office," assuming 30-40 employees will be using it.

What is the diamond problem?

Explain the Singleton Design Pattern.

What is a dangling pointer?

In Linux, how would you find the names of files in subdirectories whose names start with "b" and have the string "aeiou" in their content?