A one-hour phone interview covered network concepts, your resume, projects, operating system basics, data structures, algorithms, and other topics. An overall understanding of network concepts would be helpful to clear the phone interview.

The onsite interview would be all day long, with 5-6 individual one-hour interviews.

How would you find the size of a structure without using the sizeof operator?

How would you reverse a single linked list?

How would you define bit fields in C?

What are the common IPC techniques in UNIX?

What is the difference between a micro-kernel and a macro-kernel?

Briefly explain the need for memory protection.

Why do we need POSIX standards?

Thread synchronization and critical sections.

Instruction pipelining.

TCP connection establishment and tear-down process.

MIPS architecture and the need for RISC processors in an embedded environment.

C questions to check familiarity with pointer arithmetic.