Test: Computer Memory - 1 - SSC CGL MCQ

Random Access Memory (RAM) is the type of memory that communicates directly with the CPU and enables the immediate manipulation of data and tracking of current processing tasks. RAM is volatile memory, meaning its contents are lost when the power is off. It is used for temporarily storing input data, output data, and intermediate results during computation.

Dynamic RAM (DRAM) needs to be continually refreshed for data retention. It is made up of memory cells with a capacitor and transistor, which require periodic refreshing to maintain the stored data. DRAM is slower, less expensive, and occupies less space compared to Static RAM (SRAM).

Static RAM (SRAM) retains data as long as power is provided and does not need periodic refreshing. SRAM is faster and more expensive than Dynamic RAM (DRAM) and is often used as cache memory due to its high speed and ability to retain data without the need for constant refreshing.

Programmable ROM (PROM) is a type of ROM that is non-volatile and can be programmed only once. Once the data and instructions are written to PROM, they cannot be changed or erased. PROM is used in devices where the data is intended to be permanent and not alterable.

Erasable Programmable ROM (EPROM) is a type of ROM that can be erased by exposing it to ultraviolet light and then rewritten with new data. This feature allows for the reprogramming of EPROM chips multiple times, making them useful for applications where data may need to be updated periodically.

The main difference between Dynamic RAM (DRAM) and Static RAM (SRAM) is that DRAM needs periodic refreshing to retain data, while SRAM does not require such refreshing. DRAM is slower, less expensive, and occupies less space compared to SRAM, which is faster and more costly but retains data as long as power is provided.

Read-Only Memory (ROM) is a type of memory known for its non-volatile nature. It retains its contents even when the power is off, making it suitable for storing data and instructions that need to be preserved permanently. ROM is used for essential system functions and critical data storage that should not be lost during power cycles.

Cache memory in a computer system serves the crucial function of providing high-speed access to frequently used data for the CPU. This helps in reducing the time taken to access information, thereby enhancing the overall performance of the system.

Flash memory is a non-volatile type of memory that is commonly used in devices like digital cameras and mobile phones. Unlike volatile memory, non-volatile memory retains data even when the power is turned off.

Secondary memory in a computer system is characterized by its ability to store large amounts of data for extended periods. This type of memory is non-volatile, meaning it retains data even when the power is turned off, unlike volatile primary memory.

A Hard Disk Drive (HDD) is an example of magnetic storage used in computers. It is a non-volatile storage device that utilizes rotating disks coated with magnetic material to store data, including computer programs and files.

Optical storage devices like Compact Discs (CDs) and Digital Video Discs (DVDs) are primarily used for storing data, digital audio, and visual content. They offer a convenient and durable means of storing and accessing multimedia information.

Solid State Storage devices, such as Pen/Thumb Drives, are known for their portability and varied storage capacities, making them ideal for easy data transfer between devices. They use flash memory technology, which is faster and more durable compared to traditional magnetic storage devices.

Blu-ray Discs offer higher storage capacity than DVDs, allowing them to store more data, including high-definition video and audio content. This increased capacity is due to the use of a blue laser technology, which enables data to be packed more densely on the disc compared to DVDs.

Electrically Erasable Programmable ROM (EEPROM) can be erased and rewritten electrically, distinguishing it from other types of ROM like EPROM that require exposure to ultraviolet light for erasure. EEPROM provides a convenient way to update and modify the stored data without the need for specialized equipment or processes like UV erasing.