Capgemini Embedded Software Developer interview questions

They firstly asked me to introduced my self.

1) In which language are you comfortable with ? 2) Explain Volatile Keyword 3) Use of static variable 4) Compilation and Execution flow of C Program 5) Meaning of dangling pointer and memory leakage? 6) Structure alignment, structure padding 7) Bitwise operators 8) Difference between microcontroller and microprocessor 9) Diff between I/O Mapped I/O and Memory mapped I/O 10) Explain in brief about RS232, I2C, SPI 11) Explain watchdog timer 12) What is an interrupt in microcontroller? 13)What is OS? 14) What is System Call? how is it executed? 15)Linux ipc mechanism 16) paging 17)starvation and deadlock 18) Difference between GPOS and RTOS 19) Priority inversion 20) Jiffies ? 21) hard interrupts and soft interrupts