Computer Memory and Storage

Incremental backup copies only files that have been modified since the last backup. It uses the archive bit attribute to identify changed files - when the archive bit is set to on, the file has been modified and needs backing up. After backup completes, the archive bit is switched off to mark that the file has been backed up. This is more efficient than full backups which copy all selected files regardless of changes.

A hot spare is a standby drive that automatically replaces a failed drive in a RAID array. Hot swap is manual replacement, cold swap requires system shutdown, and none is incorrect.

Dedicating memory to specific tasks does not increase total memory or optimize its usage - it merely restricts flexibility. Caching and adding memory directly address capacity. Creating instances for parallel processing reduces memory pressure per instance. Only option B fails to remediate memory problems.

Disk time percentage measures how long the disk is busy servicing requests. A sustained increase indicates the disk cannot keep up with I/O demand, causing requests to queue. This is a clear indicator of a disk bottleneck where storage performance limits overall system throughput.

Storage location 0002 is designated for the returns process in this SAP system. Returns require separate inventory tracking and processing, hence a dedicated storage location distinct from main storage (0001) or sales order storage (SO01).

VSAM automatically reclaims free space when records are deleted, maintaining efficient space utilization (Option B). VSAM files are also device and operating system independent, providing portability across different mainframe environments (Option C). Option A is incorrect because VSAM's random access nature means sequential reading is not its primary mode, and Option D is false since B and C are valid advantages.

Storage Essentials and Report Optimizer are HP tools for storage management. Storage Essentials handles storage discovery (finding and inventorying storage assets), while Report Optimizer generates reports. Together they also provide storage utilization analysis and capacity planning features.

A Netezza rack can typically store significantly more than 4, 8, or 12 TB - standard configurations support multi-petabyte scales, making 'None of the above' the correct answer as the given options are all too low for actual Netezza rack capacity.

FPGAs are primarily used for hardware acceleration of specific tasks like data filtering through field-programmable logic gates. They do not store data to disk (Option A) or hold mirror data (Option C) as those are storage system functions.

DLL stands for Dynamic Link Library, a shared library concept in Microsoft Windows. Option A correctly uses 'Dynamic', 'Link', and 'Library'. Options B, C, and D incorrectly use 'Locator' instead of 'Library'. Option D has an inappropriate word as the first term.

VM stands for Virtual Memory, a memory management technique that creates an illusion of having more main memory than physically available. It allows programs to use more memory than what's actually installed by using disk space as an extension of RAM. This is essential for running large applications or multiple programs simultaneously.

The 8086/8088 processors have four segment registers: Code Segment (CS), Data Segment (DS), Stack Segment (SS), and Extra Segment (ES). There is no 'Address Segment' (AS) register - this is a fabricated option. Segment registers are used to address different memory regions in the segmented memory architecture of these processors.

Direct Memory Access (DMA) is designed to transfer large blocks of data directly between peripherals and memory without CPU intervention. It is most efficient for high-speed devices like disk drives transferring data to RAM. ROM is read-only memory used for storing firmware, so data transfer between disk drive and ROM is not a typical DMA use case.

Floppy diskettes (typically 1.44 MB) store significantly less data than hard disks (gigabytes to terabytes), CD-ROMs (700 MB), or magnetic tapes (up to terabytes). Diskettes represent the smallest storage capacity among common computer storage media.