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WHAT IS THE HARD DISK DRIVE? A hard disk, also known as a hard drive, is a storage device used in computers and other digital devices to store data. It is a non-volatile storage device, which means that data is retained even when the power is turned off. The hard disk consists of one or more metal platters coated with a magnetic material. These platters spin rapidly while a read/write head moves across the surface to read or write data. The read/write head is mounted on an arm that can move in and out, allowing it to access different parts of the platter. The data on a hard disk is stored in binary form as magnetic patterns on the surface of the platters. The read/write head can change the magnetic state of these patterns, which allows it to write data to the disk or read data from the disk. Hard disks are available in various sizes and capacities, ranging from a few gigabytes to several terabytes. They are commonly used in desktop and laptop computers, servers, and other digital devic...

 What is internet? | इंटरनेट क्या है ? The internet is a vast network of interconnected devices and computers that enable the exchange of information and data between users worldwide. It is a technology that has revolutionized the way we communicate, learn, work, and entertain ourselves. At its core, the internet is a system of networks that uses standardized communication protocols to connect computers and devices across the world. These networks are managed by internet service providers (ISPs) who provide internet access to users through wired or wireless connections. The internet has its roots in the 1960s when the United States Department of Defense developed a network called ARPANET to link its research institutions. ARPANET was the first packet-switching network, which means that data was broken down into smaller packets and sent across the network to its destination. Over the years, the internet has evolved and grown exponentially, connecting millions of computers and device...

 In the world of computers, memory refers to the space where data and instructions are stored for processing. There are two types of memory in a computer: primary memory (also known as main memory) and secondary memory (also known as auxiliary memory). Primary Memory: Primary memory is the main memory of a computer, which is directly accessible to the processor. It is also called the volatile memory because it loses its contents when the computer is turned off. Primary memory is used to store data that is currently being used by the CPU, including the operating system, programs, and data that the CPU is actively processing. There are two main types of primary memory: Random Access Memory (RAM) and Read-Only Memory (ROM). RAM is a type of primary memory that can be read and written to by the CPU. It is used to store the data and programs that are currently being used by the computer. When the computer is turned off, the contents of RAM are lost. This is why RAM is also called volati...