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Job Interview Questions and Answers Directory

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DevOps & Cloud Easy technical

Q1. What is the difference between a container and a virtual machine?

A VM virtualises hardware: each VM runs a full guest OS on a hypervisor, so it is heavy (GBs) and slow to boot (minutes) but strongly isolated. A container virtualises th...

1 Answer

Operating Systems Medium technical

Q2. Explain virtual memory and paging.

Virtual memory gives each process the illusion of a large, contiguous address space, independent of physical RAM. The CPU's memory management unit translates virtual addr...

1 Answer

C++ Medium technical

Q3. How do virtual functions, vtables and virtual destructors work?

A `virtual` function enables runtime polymorphism. Each polymorphic class gets a vtable of function pointers and each object stores a hidden vptr. A call through a base p...

0 Answer