Computer Memory and Storage

The function of the program counter is to point to the memory address from which next byte is to be fetched.

It is used for temporary store for the current instruction of a program.

It is concerned for addresses that refers to the memory other than registers.

The operand is in a memory location and the address of this location is given explicitly in the instruction.

If the operation involves reference to an operand in memory or available via I/O, then operand address calculation determines the address of the operand.

It replaces the contents of IP with part of the instruction and the content of CS with another part of instruction in 8086 processor.

For random access memory, i.e. the time from the instant that an address is presented to the memory to the instant that data have been stored.

Unmount media is the safe method to remove pen drive.

DMA (Direct Memory Access) is a method of transferring data from the computer's RAM to another part of the computer without processing it using the CPU.

Paging is a memory-management scheme that permits the physical-address space of a process to be non-contiguous.

A register is one of a small sets of data holding places that are part of a computer processor.

Yes all of the above four statements are true about virtual memory in operating system.

Yes, options (2) and (3) are true statements and (1) is a false statement.

Floppy disks and hard disks are external storage devices because they are separate hardware components that can be connected to or installed in a computer system. Internal storage refers to components permanently inside the computer like RAM. Remote storage involves network-based or cloud storage. Floppy and hard disks are classic examples of external/peripheral storage media.

Mouse is not a storage device.