Embedded Guru

First Round (Telephonic Round) Networking Questions: 1. What is used to translate domain name to IP Address? (DNS) 2. How to get the local address of the device ? (ARP) Linux Command Questons ; 1. Command to write in a file as well as display ( tee) 2.Command to setup a firewall ..(i said i dont know,,answer:iptables) 3.Command to add route (route command) C Language Questions: 1. How to get the  number of elements in an array( i said sizeof() operator) 2. How can you write ++ * ptr in another way?(i said ++(*ptr)) 3. How to write a function pointer that takes a char *  and integer as an argument and returns an int (int (*func)(char *, int) Second Round(Telephonic) 1. Tell me about yourself 2. main(){ char *ptr = "worlds"; strcpy(p, "hello"); } o/p of this program 3. Difference between call by value and call by reference 4. Difference between structure and union 5. Storage classes in C 6. Can we use both extern and static 7. What hap

What is the need for device tree? Booting process from u-boot to kernel start? More questions on System.map?Whether the address are correct? What happens if we remove system.map ? where it is located? Where is MMU turned ON either at bootloader or kernel? What is readback cache or writeback cache?