Compilation steps of a C program

There are four steps

1. Preprocessing
2. Compilation
3. Assembling
4. Linker

STEPS	INPUT	OUTPUT	GCC
Pre Processing	source file	preprocessed output (removing all # defines & replacing macros)	gcc -E a.c output will be printed in console where we can see all the Macro are replaced.
Compilation	Preprocessed output file	Assembly language code	gcc -S a.c output will be in a.s file
Assembling	Assembly code	Machine code	gcc -c a.c output will be in a.o
Linker	Machine code	executable file	gcc a.c output will be a.out file

Cisco Interview Questions

Had 5 rounds of interview

1. Telephonic technical Round
    * steps of compilation
    * storage classes & memory allocation
    * pass by value & pass by reference
    * questions on pointers
    * stack & heap in C
    * Reverse a linked list
    * Middle element of a linked list
    * difference between insertion & quick sort
    * time complexities of all sorting algorithms
    * difference between TCP & UDP

2. Technical round-1 (F2F)
    * TCP/IP layer
    * how ping works
    * IP header
    * questions about data link layer

3. Technical round-2 (F2F)
    * Find a duplicate in an array of 1 to n elements
    * swap without comparison
    * deletion of a linked list
    * find a loop in a linked list
    * set a bit in a integer
    * stack & heap - malloc & calloc
    * some questions in pointers

4. Technical round-3 (F2F)
    * find the sum of array using recursion
    * pattern matching
    * find the intersection of two linked list and questions on projects done.

5. Manager round (F2F)
    * how trace route works
    * how route works
    * ipconfig works
    * some HR questions like , how you manage pressure, strength etc.,