Tag: hardware

To solve this question, the user needs to have knowledge about computer hardware and specifically about the IRQ (Interrupt Request) system.

The IRQ system is used by devices to communicate with the CPU (Central Processing Unit) and request its attention. Each device is assigned a specific IRQ number to ensure proper communication and coordination.

COM1 is a standard serial port used for connecting peripherals such as modems or serial mice. In the IRQ system, COM1 commonly uses IRQ 4.

Let's go through each option and explain why it is right or wrong:

A. 3: This option is incorrect because COM1 commonly uses IRQ 4, not IRQ 3.

B. 4: This option is correct. COM1 commonly uses IRQ 4.

C. 6: This option is incorrect because COM1 commonly uses IRQ 4, not IRQ 6.

D. 7: This option is incorrect because COM1 commonly uses IRQ 4, not IRQ 7.

E. 14: This option is incorrect because COM1 commonly uses IRQ 4, not IRQ 14.

The Answer is: B

To solve this question, the user needs to know the differences between the types of computer memory.

A. CPU (Central Processing Unit) is not a type of memory, it is a processing unit that performs most of the processing inside a computer.

B. ROM (Read-Only Memory) is a type of non-volatile memory that retains its data even when the power is turned off. It is used to store firmware, BIOS, and other permanent system data.

C. RAM (Random Access Memory) is a type of volatile memory that does not retain its data when the power is turned off. It is used to temporarily store data while the computer is running.

D. DRAM (Dynamic Random Access Memory) is a type of volatile memory that requires constant refreshing to retain its data. It is used as the main memory in most computers.

E. DIMM (Dual In-Line Memory Module) is not a type of memory, it is a form factor for RAM modules.

Therefore, the correct answer is B. ROM.