which is a semiconductor memory a) static b) dynamic c) cache d) both a & b
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Answer:
Semiconductor memory is a digital electronic semiconductor device used for digital data storage, such as computer memory. It typically refers to MOS memory, where data is stored within metal–oxide–semiconductor (MOS) memory cells on a silicon integrated circuit memory chip.[1][2][3] There are numerous different types using different semiconductor technologies. The two main types of random-access memory (RAM) are static RAM (SRAM), which uses several MOS transistors per memory cell, and dynamic RAM (DRAM), which uses a MOS transistor and a MOS capacitor per cell. Non-volatile memory (such as EPROM, EEPROM and flash memory) uses floating-gate memory cells, which consist of a single floating-gate MOS transistor per cell.
Most types of semiconductor memory have the property of random access,[4] which means that it takes the same amount of time to access any memory location, so data can be efficiently accessed in any random order.[5] This contrasts with data storage media such as hard disks and CDs which read and write data consecutively and therefore the data can only be accessed in the same sequence it was written. Semiconductor memory also has much faster access times than other types of data storage; a byte of data can be written to or read from semiconductor memory within a few nanoseconds, while access time for rotating storage such as hard disks is in the range of milliseconds. For these reasons it is used for main computer memory (primary storage), to hold data the computer is currently working on, among other uses.
As of 2017, semiconductor memory chips sell $124 billion annually, accounting for 30% of the semiconductor industry.[6] Shift registers, processor registers, data buffers and other small digital registers that have no memory address decoding mechanism are typically not referred to as "memory" although they also store digital data.
Answer:
both a and b is the answer option -d.