Computer Memory and Storage

CD-ROM (Compact Disc Read-Only Memory) uses optical technology where a laser reads microscopic pits on the disc surface. Unlike magnetic storage (floppy disks, tape) or electrical methods, optical technology uses light to read data.

RAM configurations typically follow binary patterns (powers of 2). Options like 32 MB, 64 MB, and 256 MB are standard. '126 RAM' is not a valid RAM configuration - it should be 128 MB for proper binary alignment.

This policy in memory management deals with the selection of a page in memory to be replaced after a page fault occurs and a new page must be brought in.

This operation in memory management decides when a modified page should be written out to the secondary memory.

This is dependent on some defined criterion and uses the main memory to hold the information.

This implementation method forms a set of n-bit registers, one for each block in the set to be considered.

Booting is the process of loading the operating system from disk into RAM when you power on or restart a computer. The OS must be in memory to function, and this loading process is universally called booting (from 'pulling oneself up by bootstraps').

IPS (Instructions Per Second) measures how many instructions a CPU can execute per second, making it the appropriate unit for computer processing speed. DPI measures print/display resolution, CPS (Cycles Per Second) is related to clock speed (now measured in Hz), and RAM is memory capacity measured in bytes, not speed.

Winchester disk was the code name for IBM's revolutionary hard disk drive technology introduced in 1973. It featured sealed unit construction with read/write heads floating over the disk surface on an air cushion. This became the industry standard for hard drives. CD-ROMs, floppy disks, and pen drives are all removable storage media.

Access time is a critical performance characteristic of memory, measuring the total time required to perform a read or write operation. The other terms refer to different operational concepts not specific to memory retrieval speed.

A memory cell is the fundamental building block of computer memory circuits used to store a single bit of information. Integrated circuits and chips contain many such cells, while an accumulator is a register.

Cookies are simple text files with limited functionality - they store small pieces of data and cannot execute file system operations like writing, deleting, or formatting files. This design prevents malicious websites from causing damage through cookie mechanisms.

This technique simulates shared memory at the page level, making it similar to a NUMA machine, except with a much greater penalty for remote references.

Booting is the process of loading the operating system from the secondary memory to the primary memory.

This type of memory consists of large number of memory cells and can be erased and reprogrammed in blocks instead of one byte at a time.