Computer Awareness Memory MCQ part - 1 Video Lecture | Crash Course for SSC CGL (Hindi)

Ans. Computer memory refers to the electronic storage space used by a computer to store and retrieve data and instructions. It is a crucial component that enables a computer to perform various tasks efficiently.

Ans. There are several types of computer memory, including: - Random Access Memory (RAM): It is a volatile memory that temporarily stores data that the computer is actively using. - Read-Only Memory (ROM): It is a non-volatile memory that stores permanent instructions and data that cannot be modified. - Cache Memory: It is a small and fast memory that stores frequently accessed data for quick retrieval. - Virtual Memory: It is a combination of RAM and a portion of the computer's hard drive, used to expand the available memory. - Flash Memory: It is a non-volatile memory commonly used in USB drives, memory cards, and solid-state drives (SSDs).

Ans. The main differences between RAM and ROM are: - Volatility: RAM is a volatile memory, meaning its contents are lost when the computer is powered off. ROM, on the other hand, is non-volatile, and its contents are retained even without power. - Read/Write Capability: RAM allows both reading and writing of data, making it suitable for temporary storage. ROM, however, is read-only, and its contents cannot be modified. - Usage: RAM is used in a computer to hold data and instructions that are actively being processed. ROM stores permanent instructions and data, such as the computer's firmware. - Size: RAM is typically larger in size compared to ROM, as it needs to accommodate the data and instructions required by the running programs.

Ans. Cache memory is a small and fast memory located closer to the CPU, designed to store frequently accessed data. It improves computer performance by reducing the time it takes to access data from the main memory. When the CPU needs to retrieve data, it first checks the cache memory. If the data is found in the cache, it is accessed much faster than if it had to be fetched from the main memory. This results in reduced latency and faster execution of instructions, ultimately enhancing the overall speed and efficiency of the computer system.

Ans. Virtual memory is a technique used by operating systems to expand the available memory beyond the physical RAM. It creates an illusion of having more memory than physically available by utilizing a portion of the computer's hard drive. When the RAM becomes full, the operating system transfers less frequently used data from RAM to the hard drive, freeing up space for more important data. This process is known as paging. When the data that was moved to the hard drive is needed again, it is swapped back into the RAM. Virtual memory allows computer systems to run larger programs and handle more tasks simultaneously, improving overall performance.