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What is Random access memory (RAM)
This is a volatile memory (i.e. contents are lost when computer is switched off). A user can write or delete data and read the contents. Before a program can be ran it should first be loaded into RAM that allows CPU to access the program. Battery-backed RAMs overcome data loss on switching power off though are outside the scope of these booklets.
(NOTE: For completeness, it's worth mentioning that two types of RAM exist termed as SRAM (static RAM) and DRAM (dynamic RAM) - SRAM doesn't need to be constantly refreshed to retain its memory unlike DRAM. Also consider that computers use cache which is a part of memory made from SRAM. Memory caching works as programs generally access the same data or instructions over and over again. By retaining as much information as possible in SRAM, computer operates more quickly (cache is generally termed level 1, 2 or 3 (termed L1, L2 or L3)).
Q. What is the impact of overflow for binary numbers? An overflow is said to have happened when sum of two n digits number takes n+ 1 digits. This definition is perfectly appli
I am the inventor of the railway signaling device now operated by timer. I wish to move on to the next phase where the equipment will be operated by DTMF codes. The device is a si
The lrd_stmt function associates a character string (generally a SQL statement) with a cursor. This function sets a SQL statement to be processed.
Q. Evaluate Speed of disk drive? Drive Speed: Amount of information which can be transferred in or out of memory in a second is called as disk drive speed or data transfer ra
Why does DMA have priority over the CPU when both request a memory transfer? The data transfer monitored by DMA controller which is called as DMA channel. The CPU is included o
What are coupling and cohesion and why are they important concepts in software design?
Automatic typewriter : It is a power-driven machine, which automatically types a standard pro forma from a previously punched or stencilled master. When the master is placed on th
How can we send data to external programs? Using SPA/GPA parameters(SAP memory). Using EXPORT/IMPORT data (ABAP/4 memory)
Now we will learn how to compile and run PVM programs. To compile the program change to directory pvm/lib/archname where archname is architecture name of your computer. Then the su
What are the types of Subroutines? Internal Subroutines: The source code of the internal subroutines will be in the similar ABAP/4 program as the calling procedure (intern
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