OS, Drivers & Protocols Deep Dive

Question

A deep-dive round that goes below the algorithm into systems fundamentals. Systems, device drivers, and bus protocols are central here.

What this round covers

• Process vs thread; context switching cost
• Device driver basics; kernel vs user space
• Communication protocols: I2C, SPI, UART differences
• DMA and memory-mapped I/O

Tips

Build understanding from first principles. Bring real low-level debugging stories.