Background formula checking is the process in excel that enables it to review continually the whole file for formula errors. This also functions while you are creating and entering new formulas in cells. When an error is found certain codes shows on the cells.
Answer:B
Explanation: your co workers might not know English so you would need to learn their language :)
Answer:
timer interrupt
Explanation:
A timer is an interrupt that is generated by the PC's system timer.When this interrupt occurs, the ROM BIOS interrupt handler is called and it increments a count in the ROM BIOS.It interrupts the system 18.2 times per second.It is used for multitasking.Hence we conclude that timer interrupt is the answer.