Computer Memory and Storage

PowerShell uses PSDrives to expose data stores similar to file system drives. Using specialized providers, it mounts registry hives (like HKLM: and HKCU:) and the digital signature certificate store (Cert:) as virtual drives, making 'All of the above' correct.

The 5 PEN PC uses tubular holographic storage technology, which is a key differentiating feature of this concept. Unlike traditional magnetic, optical, or electrical storage, holographic storage uses light interference patterns to store data in three dimensions, enabling much higher storage density in a compact form factor suitable for a pen-style device.

The 5 PEN PC uses tubular holographic storage technology, which is a key differentiating feature of this concept. Unlike traditional magnetic, optical, or electrical storage, holographic storage uses light interference patterns to store data in three dimensions, enabling much higher storage density in a compact form factor suitable for a pen-style device.

Netezzza uses a zone map architecture and append-only storage model. Updated records are marked as deleted and new versions are appended rather than being modified in-place. This design supports features like time travel queries and efficient rollback capability.

Flash memory is a type of EEPROM (Electrically-Erasable Programmable Read-Only Memory) that allows electrical erasing and reprogramming of data. It improves on traditional EEPROM by erasing data in blocks rather than byte-by-byte.

Flash memory is a type of EEPROM (Electrically-Erasable Programmable Read-Only Memory) that allows electrical erasing and reprogramming of data. It improves on traditional EEPROM by erasing data in blocks rather than byte-by-byte.

VHS stands for Video Home System. It was the dominant home video cassette format from the 1970s through 2000s, developed by JVC to compete with Sony's Betamax format.

A 32-bit operating system can theoretically address up to 4 GB of RAM, not 8 GB. This is due to the 32-bit address space limitation (2^32 = 4,294,967,296 bytes ≈ 4 GB). In practice, 32-bit Windows typically shows around 3.2-3.5 GB of usable RAM due to memory-mapped hardware reservations.

Unix follows 'everything is a file' philosophy, including RAM. Memory devices like /dev/mem and /dev/kmem allow treating RAM as file-like objects for reading/writing.

When the program closes, operating system automatically releases all the memory allocated by the program but it a good programming practice to release that memory by calling the function free(). The free() function is defined in the header file malloc.h

32 bit virtual address, i.e. $2^{32}$ kB of virtual memory & 1 kB page size. So total pages = $2^{32}$ So. we need to maintain a page table of $2^{32}$ rows, this require 4 GB main memory which is quite impractical due to large memory overhead

32 bit virtual address, i.e. $2^{32}$ kB of virtual memory & 1 kB page size. So total pages = $2^{32}$ So. we need to maintain a page table of $2^{32}$ rows, this require 4 GB main memory which is quite impractical due to large memory overhead

Using larger block size in a fixed block size system lead to poor disk space utilization due to data items which are very small comparable to block size cause fragmentation. But it leads to better disk through put since no. of blocks needs to fetch & replace become less.