Full formTechnology
PAEstands forPhysical Address Extension
Full Form of PAE
What is PAE?
Physical Address Extension (PAE) is a memory management feature in x86 processors that enables operating systems to access more than 4 GB of physical memory by extending the physical address space from 32 bits to 36 bits, supporting up to 64 GB of RAM. Introduced by Intel in the Pentium Pro, PAE modifies the page table structure by adding a third level of page tables, a concept that is critical in operating system design. In India, PAE is an integral part of the computer science curriculum, especially in subjects like Operating Systems and Computer Organization. It is frequently tested in GATE, ISRO, and other competitive exams through objective questions on memory mapping and page table entries. PAE also supports the NX bit for hardware-enforced data execution prevention, enhancing security. Although modern 64-bit processors have largely replaced PAE, it remains relevant in maintaining legacy servers and embedded systems. Indian IT firms sometimes enable PAE on older hardware to extend memory utility. Understanding PAE deepens knowledge of memory hierarchy and prepares students for technical interviews in software and hardware domains.
PAE का फुल फॉर्म
भौतिक पता विस्तार
Example
The system administrator enabled PAE in the BIOS to allow the Linux server to recognize all 8 GB of RAM installed.
PAE — frequently asked questions
What is the full form of PAE?
PAE stands for Physical Address Extension, a feature in x86 processors that allows accessing more than 4 GB of RAM.
Is PAE relevant for GATE exam?
Yes, PAE is a common topic in GATE Computer Science papers, especially in questions on memory management and paging.
How does PAE differ from regular paging?
PAE uses a 36-bit physical address and a three-level page table instead of two-level, enabling support for up to 64 GB of memory.