Computer Memory and Storage

Hard disks have the highest data density among listed options, using magnetic storage with tracks and sectors that can store bits extremely close together. DVDs and CDs have lower density than modern hard disks. Floppy disks are obsolete with very low density. Tape drives have high capacity but lower density than hard disks.

Hard disks can store the maximum data among the options listed. Modern hard disks range from hundreds of GB to multiple TB. DVDs store 4.7-17 GB, CDs store 700 MB, floppy disks store 1.44 MB, and tape drives vary but are generally comparable to or less than hard disks in practical capacity.

Standard compact discs (CDs) have a storage capacity of 700 MB for data. The 1.44 MB option is for floppy disks, while 780 MB and 1024 MB are not standard CD capacities.

 Option (4) is correct.

RAM (Random Access Memory) is the primary volatile memory in a computer that stores data and programs currently in use. DSL (Digital Subscriber Line) is an internet connection technology, USB is a connection interface/port, and LAN (Local Area Network) is a network configuration - none of these refer to computer memory.

A folder allows people to organize their files in a way that makes sense to them.

The placement policy of memory management determines where in real memory, a process piece is to reside.

The selective fetch policy is dependent upon some defined criterion, and in these cases using the main memory rather than the cache to hold the information.

In the sector mapping, the main memory and the cache are both divided into sectors; each sector is composed of a number of blocks.

This device consists of several circular disk mounted on spindle provided with read/write head to perform read/write operation on the disk.

Memory is an active cognitive system that performs three key functions: receives information from the environment, organizes and encodes it, and stores it for later retrieval. This active processing view contrasts with passive models of memory as mere storage. Memory involves encoding, storage, and retrieval as dynamic processes.

Here, the displacement is computed relative to the IP in 8086 processor.

Here, the byte contains bits which specify a register pair in which the data is located in 8085 processor.

It shifts data into internal storage elements and shifts data out at the serial out, data out, pin.

Here, the byte contains bits which specify a register pair, which in turn contains the address of the data in memory in 8085 processor.