Answer:
From DRAM to DDR4
Explanation:
RAM stands for <em>Random Access Memory.</em> In 1968, Mr. Robert Dennard at IBM's Watson Research obtained the patent for the one-transistor cell that will eventually substitute the old magnetic core memory allocated in computers of the time. By 1969 Intel released the TTL bipolar 64-bit SRAM (Static Random-Access Memory) as well as the ROM "Read Only Memory"; also in 1969 it evolved into "<em>Phase - change memory - PRAM - </em>". However this evolution was not commercialized, Samsung expressed its interest in developing it. In 1970 the first DRAM product was commercially available; it was developed by Intel. In 1971 it was patented EPROM; in 1978 George Perlegos developed EEPROM.
By 1983 a nice breakthrough happened with the invention of SIMM by Wang Labs. In 1993 Samsung came up with KM48SL2000 synchronous DRAM (SDRAM), this variation soon turned into an inductry standard.
In 1996 DDR began a revolution in the memory sector, then in 1999 RDRAM. Both DDR2 SDRAM. DDRR3 and XDR DRAM were commercialized. Finally in 2007 and 2014 the developments of DDR3 and DDR4 were available for the general public.
<span>Files exist on data storage devices, such as hard disks, DVDs, USB drives, and reels of magnetic tape.
</span>Data storage<span> is the recording (storing) of information (data) and </span><span>these data storage devices use</span> a technology consisting of computer components and recording media used to retain digital data.DVDs, USBs and hard disks are examples for external data storage devices.
#1 is A and #2 is B, but I don't know about #3 and #4.
Answer:
Answered below
Explanation:
aFile = open("books.txt", "r")
This code uses the function open() which takes two parameters. The first parameter is the file name while the second parameter is the mode in which you are accessing the file.
The "r" mode opens the file in a reading state. That is, you can only read from the file. This code completes the reading process
aFile.read( )
The "w" mode opens the file so you can write to it and make changes.
The "a" mode opens the file so you can add contents to it.
Answer:
a transducer
Explanation:
A transducer happens to be a device that is being used for converting one form of energy into another generally when converting the input energy to the output energy. And for the transduction to take place, the change of one form of energy also occurs, like the conversion of mechanical energy to the electrical energy and also from electrical energy to mechanical energy, and which is what is required here. Hence, the correct option here is the transducer.
