Fundamentals of Computer and IT Quiz

Hardware refers to the physical components of a computer system, including the central processing unit (CPU), memory, storage, input devices (keyboard, mouse), and output devices (monitor, printer). These components are essential for the operation of a computer and allow it to perform tasks, process information, and interact with the user.

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The motherboard is the main circuit board of a computer that connects all the other components, including the CPU, RAM, storage devices, and expansion cards. It provides the necessary pathways for data to flow between these components, enabling the computer to function as a cohesive system.

<p>Inkjet printers use ink cartridges to spray ink onto paper, while laser printers use a toner cartridge that is heated and transferred to paper. Inkjet printers are generally cheaper but have lower print quality and speed, while laser printers are more expensive but offer higher quality and faster printing speeds. For smaller volume printing, inkjet printers are more common, while laser printers are better suited for large-scale printing needs.</p> Signup and view all the answers

<p>OMR (Optical Mark Recognition) is a technology used to read marks on paper forms, like multiple-choice answer sheets. The system uses a light source to scan the form and detect filled circles, which are then interpreted as answers. OMR systems are used in various applications, including exams, surveys, and data collection.</p> Signup and view all the answers

<p>A compiler is a program that translates high-level programming code (like C++, Java) into machine language, which is the language understood by the computer. The interpreter, on the other hand, executes code line by line without first converting it completely into machine code. Interpreters are often used for scripting languages like Python and Ruby, where code may be executed interactively. Compilers are generally used for complex programs, as they offer greater efficiency once compiled, while interpreters are more suitable for rapid prototyping and development.</p> Signup and view all the answers

<p>A cell reference is a unique identifier that refers to a specific cell in a spreadsheet. Cells are organized in rows and columns, and their reference is a combination of the column letter and the row number, e.g., A1, B2, C3. Cell references are used to specify cells for formulas, calculations, and data manipulation in the spreadsheet.</p> Signup and view all the answers

<p>A Certification Authority (CA) is a trusted entity that issues and manages digital certificates. Digital certificates contain information about the owner's identity and public key, which are used to verify the authenticity and integrity of communications. CAs play a crucial role in securing online transactions and ensuring the trust in digital identities.</p> Signup and view all the answers

<p>Cryptocurrency is a digital form of money that uses cryptography for security. It operates independently of central banks or financial institutions. Bitcoin, Ethereum, and Litecoin are examples of popular cryptocurrencies. These currencies use decentralized networks for transactions, ensuring transparency and tamper-proof records.</p> Signup and view all the answers

<p>Mobile computing refers to the capability of accessing and processing data wirelessly using mobile devices, like smartphones and tablets. It allows users to connect to the internet, access applications, and share data from anywhere. This advancement has revolutionized the way people work, communicate, and access information.</p> Signup and view all the answers