Computer Test 1
C was developed in the year ___
  • 1970
  • 1972
  • 1976
  • 1980
Explanation: C programming language was developed in the year 1972. Explanation: C was developed by Dennis Ritchie at Bell Labs between 1969 and 1973. The first edition of the book "The C Programming Language" by Brian Kernighan and Dennis Ritchie, which documented the language, was published in 1978. Therefore, the correct answer is: 1972
A declaration float a; occupies ______of memory ?
  • 1 bytes
  • 4bytes
  • 8byte
  • 16 bytes
Explanation: In C programming, the declaration float a; indicates that variable a is of type float. Here's an explanation of how much memory this declaration typically occupies: 4 bytes Explanation: In most modern compilers and systems, a float data type occupies 4 bytes of memory. This is standard on many platforms, where float is a single-precision floating-point number. Floating-point numbers are used to represent real numbers (those with fractional parts) and have a specified range and precision, typically adhering to the IEEE 754 standard for floating-point arithmetic. This memory allocation allows float variables to store values with decimal places, providing flexibility in numerical computations compared to integer types. Therefore, the correct answer is: 4 bytes
Computers, combine both measuring and counting, are called :
  • Analog
  • Digital
  • Hybrid
  • All of these
Explanation: Computers that combine both measuring and counting capabilities are referred to as hybrid computers. Explanation: Analog computers operate on continuous data and use physical phenomena like electrical voltages or mechanical movements to perform calculations. They are suited for tasks requiring real-time processing of continuous signals, such as in scientific simulations or control systems. Digital computers operate using discrete data represented as binary digits (bits: 0s and 1s). They are versatile for general-purpose computing tasks, including arithmetic operations, data processing, and software applications. Hybrid computers integrate aspects of both analog and digital computers. They leverage analog processes for measuring and monitoring physical quantities, while using digital components for processing, storage, and control. This makes them suitable for applications requiring both real-time data acquisition and complex computation, such as weather forecasting, medical imaging, and industrial control systems. Therefore, the correct answer to your question is: Hybrid
Which of the following is/ are operating systems
  • Windows
  • Unix
  • OS/2
  • All of these
Explanation: All of the options provided—Windows, Unix, and OS/2—are indeed operating systems. Here's an explanation for each: Windows: Developed by Microsoft, Windows is one of the most widely used operating systems for personal computers. It includes various versions such as Windows 10, Windows 11, and previous versions like Windows 7 and Windows XP. Windows provides a graphical user interface (GUI) and supports a wide range of software applications. Unix: Unix is a powerful, multi-user, and multitasking operating system originally developed in the 1960s and 1970s at Bell Labs. It has various versions and flavors, such as Linux (a Unix-like operating system), BSD (Berkeley Software Distribution), and commercial Unix systems like Solaris, HP-UX, and AIX. Unix systems are widely used in servers, workstations, and embedded systems. OS/2: OS/2 (Operating System/2) is an operating system developed by IBM and Microsoft in the late 1980s. It was designed to provide a multitasking and multi-threaded environment for personal computers. Although it was popular during its time, OS/2 is not as widely used today compared to Windows and Unix/Linux systems. Explanation: Operating systems manage computer hardware and software resources, providing services for computer programs and users. They facilitate communication between applications and hardware, manage memory and storage, and provide security and user interface capabilities. All of these: This option is correct because Windows, Unix, and OS/2 are all examples of operating systems that have been developed and used in various computing environments over the years. Therefore, the correct answer is: All of these
LAN stands for……………
  • Limited Area Network
  • Logical Area Network
  • Local Area Network
  • Large Area Network
Explanation: LAN stands for Local Area Network. Explanation: Local Area Network (LAN): A LAN is a network that connects computers and devices within a limited geographical area such as a home, office building, or campus. It allows connected devices to communicate and share resources like files, printers, and internet connections. LANs typically operate at higher speeds and with lower latency compared to Wide Area Networks (WANs) or other network types. Limited Area Network: This term is not commonly used to describe networking technologies. The correct term for a localized network is "Local Area Network" (LAN). Logical Area Network: This term does not accurately describe a physical or virtual network infrastructure. Networks are categorized based on physical geography or scope, not logical distinctions alone. Large Area Network: A Large Area Network (LAN) is a network that spans a large geographical area, typically connecting multiple LANs or other networks. It is the opposite of a Local Area Network (LAN) in terms of scope and scale. Conclusion: LANs are fundamental to local communication and resource sharing in computing environments, providing efficient connectivity for devices within a limited area. Therefore, the correct answer is: Local Area Network
Note book, laptop,palm,hand-held computers are coming under the category of………
  • Digital computer
  • Mainframe computer
  • Portable computer
  • Hybrid computer
Explanation: Notebooks, laptops, palm-sized, and handheld computers fall under the category of portable computers. Explanation: Portable computers: These are designed to be easily transported and used in different locations. They typically include: Notebooks and Laptops: These are compact computers with built-in screens and keyboards, suitable for general computing tasks. Laptops are more powerful and versatile, often used as primary computers for work or personal use. Palmtop and Handheld Computers: These are smaller devices designed for mobile computing. They include personal digital assistants (PDAs), smartphones, and tablet computers. These devices are compact, lightweight, and often have touchscreens for user interaction. Digital computer: This is a broad category that includes all types of computers using digital technology for processing data. It encompasses mainframes, minicomputers, personal computers, and portable computers. Mainframe computer: These are large, powerful computers used primarily by large organizations for critical applications such as bulk data processing and transaction processing. Hybrid computer: These combine features of analog and digital computers, as mentioned earlier. Conclusion: Portable computers like notebooks, laptops, palmtops, and handheld devices are designed for mobility and ease of use in various environments, distinguishing them from larger, fixed-location computers like mainframes or specialized hybrid systems. Therefore, the correct answer is: Portable computer
………….printer is the cheapest in terms of price and operating cost
  • Inkjet
    • Explanation: The printer that is typically the cheapest in terms of both initial price and operating cost is the dot matrix printer. Explanation: Dot matrix printers are known for their low initial purchase cost compared to other types of printers. They use a printhead that strikes an ink-soaked ribbon against the paper to create dot patterns, forming characters and images. These printers are durable and can handle multi-part forms, making them suitable for environments where carbon copies are required. Operating cost: Dot matrix printers are also economical in terms of operating costs because they use ribbons that are relatively inexpensive compared to toner cartridges or ink cartridges used in other types of printers. Inkjet printers: These printers use liquid ink sprayed through tiny nozzles onto the paper. While they are versatile and produce high-quality color prints, they can be more expensive both initially and in terms of operating costs due to the cost of ink cartridges. Laser printers: Laser printers use toner cartridges and a laser beam to create images on a drum, which are then transferred onto paper. They are known for fast printing speeds and sharp text quality, but their initial cost and toner cartridge replacements can be higher compared to dot matrix printers. Thermal printers: These printers use heat to transfer ink onto paper, typically used in applications like receipts or labels. While they are efficient for specific tasks, they may have higher operating costs due to the cost of thermal paper or ribbons. Conclusion: Dot matrix printers are often chosen for their affordability in terms of both initial purchase price and ongoing operational expenses, making them suitable for environments where cost-effective printing is a priority. Therefore, the correct answer is: Dot matrix