what is the meaning of 64 bit operating system?

Answer 1

Enterprises need 64-bit operating systems as they offer greater power, reliability and scalability. First and foremost, a 64-bit machine can address more memory directly without using complex indexing or register-addressing schemes. Because internal memory is several orders of magnitude faster than storage, combining a 64-bit processing architecture with more RAM lets a processor pull more data into memory and operate on it directly, increasing performance manifold.

In computer architecture, 64-bit integers, memory addresses, or other data units are those that are at most 64 bits (8 bytes) wide. Also, 64-bit CPU and ALU architectures are those that are based on registers, address buses, or data buses of that size.

64-bit CPUs have existed in supercomputers since the 1960s and in RISC-based workstations and servers since the early 1990s. In 2003 they were introduced to the (previously 32-bit) mainstream personal computer arena, in the form of the x86-64 and 64-bit PowerPC processor architectures.

A CPU that is 64-bit internally might have external data buses or address buses with a different size, either larger or smaller; the term "64-bit" is often used to describe the size of these buses as well. For instance, many current machines with 32-bit processors use 64-bit buses (e.g. the original Pentium and later CPUs), and may occasionally be referred to as "64-bit" for this reason. The term may also refer to the size of an instruction in the computer's instruction set or to any other item of data (e.g. 64-bit double-precision floating-point quantities are common). Without further qualification, however, "64-bit" computer architecture generally has integer registers that are 64 bits wide, which allows it to support (both internally and externally) 64-bit "chunks" of integer data.

Answer 2

Meaning Of 64 Bit Operating System

Answer 3

It means the processor accepts, calculates and outputs information in 64 bit 'chunks'. For instance, in binary language, it might accept, process and output a statement such "0101011101000101010101110100010101010111010001010101011101000101" all in one cylce of its processor clock!