Test: ROM (Read Only Memory) - 2 - Electronics and Communication Engineering (ECE) MCQ

The MOS technology based semiconductor ROMs are classified into three categories: Mask ROM, PROM,& EPROM. PROM stands for Programmable Read Only Memory in which the ROM can be externally programmed by the user. EPROM stands for Erasable Programmable Read Only Memory, where the ROM and be cleared and re-programmed.

The full form of EEPROM is Electrically Erasable Programmable ROMs. In EPROM (Erasable Programmable ROMs), the ROM is cleared by exposing it to UV radiation and also it’s a tedious process. Whereas, in EEPROM, the ROM can be cleared electrically and thus is less time consuming and more efficient.

In generalised form, the data paths are of 8 bits. The data path, also known as data bus, is the channel through which the processor sends and receives data.

The input and output are used to control the function of a microprocessor. Hence, the control bus is used to transfer the input and output signal from microprocessor to external peripherals and or from external peripherals to microprocessor.

A valve is a device that regulates, directs or controls the flow of a fluid (gases, liquids, fluidized solids, or slurries) by opening, closing, or partially obstructing various passageways. So, it is not a part of hard disk.

A floppy disk is a removable disk used for storing data via magnetic facilities. In the floppy drive, data is written to and read from the disk via a magnetic read/write head mechanism.

All types of ROM are programmable and can be programmed as per requirement but the mask ROM is always programmed for specific application and it can’t be reprogrammed. PROM stands for Programmable Read Only Memory in which the ROM can be externally programmed by the user. EPROM stands for Erasable Programmable Read Only Memory, where the ROM and be cleared and re-programmed.

A major disadvantage of the mask ROM is that it cannot be reprogrammed if stored data needs to be changed. PROM stands for Programmable Read Only Memory in which the ROM can be externally programmed by the user. EPROM stands for Erasable Programmable Read Only Memory, where the ROM and be cleared and re-programmed.

“Random access” mean which can be accessed randomly and in other words any address can be accessed in any order.

In EPROM (Erasable Programmable ROMs), the ROM is cleared by exposing it to UV radiation and also it’s a tedious process. Whereas, in EEPROM, the ROM can be cleared electrically and thus is less time consuming and more efficient.