Many times we worry that what package we are eligible to download and install in our systems so that our java code runs fine. If you go to java download page, it lists various installation packages mentioning 32-bit packages or 64-bit packages for various platforms such as Linux or windows. Similarly, 32-bit computing, CPU or 32-bit programming uses 32 bits (four octets/bytes) for all the above purposes. From the software perspective, 64-bit computing means the use of code with 64-bit virtual memory addresses. Also, 64-bit CPU and ALU architectures are those that are based on registers, address buses, or data buses of that size.
In computer architecture, 64-bit computing is the use of processors that have datapath widths, integer size, and memory addresses widths of 64 bits (eight octets/bytes).
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