Information Technology Class 9 MCQ With Answers

The acronym PAN stands for Personal Area Network. A Personal Area Network is a type of network that connects devices within a person's immediate vicinity, typically within a range of 10 meters. It allows for the communication and sharing of data between devices such as smartphones, laptops, and wearable devices. A PAN is usually created using wireless technologies like Bluetooth or infrared, enabling convenient and secure connectivity for personal devices.

The correct answer is "WIDE AREA NETWORK". A Wide Area Network (WAN) is a computer network that spans a large geographical area, typically connecting multiple local area networks (LANs) together. It allows for the transmission of data, voice, and video over long distances, often using public or private telecommunications infrastructure. WANs are commonly used by businesses and organizations to connect their branches or offices located in different cities or countries, providing them with a secure and reliable means of communication and data sharing.

Printing is not used to facilitate communication on the network because it involves physical output of documents or files, rather than transmitting messages or information electronically. E-mail, instant messaging, and chat rooms are all digital communication methods that allow users to send and receive messages or files over a network. However, printing involves the physical process of producing hard copies of documents, which is not directly related to network communication.

A satellite is a specialized type of transmitter that is launched by a rocket and placed in orbit around the earth. Satellites are used for various purposes such as communication, weather forecasting, navigation, and scientific research. They transmit signals back to earth, allowing us to receive information and communicate over long distances.

The acronym LAN stands for Local Area Network. A Local Area Network is a network that connects computers and devices within a limited geographical area, such as a home, office, or building. It allows for the sharing of resources, such as files, printers, and internet connections, among connected devices. LANs are typically faster and more secure than wide area networks (WANs) because they cover a smaller area and are privately owned and controlled.

A network allows multiple computers to connect and share resources, including software. By sharing software, users can access and use programs installed on other computers within the network. This can be beneficial in a variety of scenarios, such as collaboration on a project or accessing specialized software that is only available on specific computers. Sharing software over a network promotes efficiency, flexibility, and cost-effectiveness as it eliminates the need for individual installations on each computer.

Satellites have various functions, including television broadcast, internet communications, and weather forecasting. They are used to transmit television signals to viewers around the world, facilitate internet connectivity in remote areas, and gather data to predict and monitor weather patterns. Therefore, all of the options mentioned are valid functions of a satellite.

A network refers to a collection of computers and devices that are interconnected through communication channels. This allows for the exchange of information and resources between the connected devices. The correct answer accurately describes the concept of a network as a system of interconnected devices rather than being solely based on software or hardware.

PAN, which stands for Personal Area Network, is a communication technology that is commonly used with Bluetooth. Bluetooth technology allows devices to connect and communicate wirelessly over short distances, typically within a range of 10 meters. Therefore, the correct answer is Bluetooth.

The acronym PAN stands for Personal Area Network. A Personal Area Network refers to a network that connects devices within a small area, typically within a person's personal space, such as a room or office. It allows for the interconnection of devices like smartphones, laptops, tablets, and other wearable devices, enabling them to communicate and share data with each other. This acronym is commonly used in the field of technology and networking.

A WAN, or Wide Area Network, covers a large geographic area such as a city, country, or even spans intercontinental distances. It uses a communications channel to connect multiple local area networks (LANs) together, allowing for data and information to be transmitted over long distances. This allows for efficient communication and sharing of resources between different locations within the network.

A Personal Area Network (PAN) is the smallest type of network. It is used for connecting devices within a short range, typically within a person's workspace or immediate surroundings. Examples of PAN devices include Bluetooth-enabled devices, such as smartphones, laptops, and wearable technology. PANs are designed for personal use and provide a convenient way to connect and share data between devices in close proximity.

Fiber Optic Cable is not a type of Wireless Media because it uses optical fibers to transmit data through light signals rather than using radio waves or electromagnetic signals like the other options. Bluetooth, satellite, and microwave are all examples of wireless communication technologies that use different frequencies or methods to transmit signals without the need for physical cables. Fiber Optic Cable, on the other hand, is a wired medium that provides high-speed data transmission through thin strands of glass or plastic fibers.

Analog signals are measured in volts because they represent continuous, varying electrical signals. Frequency, on the other hand, is a measure of how often a signal repeats or cycles per second. It is measured in Hertz (Hz), which is the unit used to quantify the frequency of a signal.

A twisted pair is a type of cable that consists of two independently insulated wires twisted around one another. This design helps to reduce electromagnetic interference and crosstalk between the wires, making it suitable for transmitting data over short distances. Unlike coaxial cables, twisted pair cables do not have a central conductor and are commonly used in Ethernet networks for connecting devices.

A coaxial cable consists of an inner conductor and an outer conductor separated by an insulated plastic. This design allows for the transmission of signals with minimal interference and loss. The inner conductor carries the signal, while the outer conductor acts as a shield, protecting the signal from external electromagnetic interference. The insulation between the two conductors prevents them from coming into direct contact, ensuring proper signal transmission. Coaxial cables are commonly used in applications such as cable television, internet connections, and telecommunications.

The term "bit" is a contraction of the words "binary" and "digit". A bit is the basic unit of information in computing and digital communications, representing either a 0 or a 1. It is derived from the combination of the words "binary", which refers to the base-2 numeral system used in computing, and "digit", which is a numerical symbol. Therefore, the correct answer is "BIT".

Fiber Optic Cable is a type of physical media used for transmitting data. It is made up of thin strands of glass or plastic that can carry large amounts of data over long distances using light signals. Unlike other options listed, such as Bluetooth, Satellite, and Microwave, which are wireless technologies, Fiber Optic Cable is a physical cable that is used for wired connections. It is known for its high bandwidth, low signal loss, and immunity to electromagnetic interference, making it ideal for long-distance and high-speed data transmission.

Bluetooth is a technology that allows for the exchange of data over short distances using short-length radio waves. It enables wireless communication between devices such as smartphones, tablets, and computers. Bluetooth uses low-power radio waves to transmit and receive data, making it ideal for short-range communication. The term "Bluetooth" refers to the technology itself, while "Blue Tooth" is a common misspelling or variation of the term.

A Metropolitan Area Network (MAN) connects multiple local area networks (LANs) or campus area networks within the boundaries of a city or town. It provides high-speed data transmission and covers a larger geographical area than a LAN but does not extend beyond the immediate town or city.

This refers to a type of link called a microwave link. It consists of a series of microwave radio antennas that are positioned on towers at different sites. These antennas transmit and receive microwave signals, allowing for communication over long distances.

The term "digital" refers to a system or device that uses discrete electrical pulses to represent information in the form of bits. These pulses can be either on or off, representing the binary digits 1 and 0. Digital systems are commonly used in modern technology, including computers, smartphones, and digital communication networks, as they provide a more reliable and efficient means of storing and transmitting data compared to analog systems.

The correct answer is "Sharing software." This option allows users to connect to a network that can access application programs. By sharing software, users can access and use the same programs and applications on the network, allowing for collaboration and efficient communication. Sharing files, data, and information may also be possible within the network, but the main focus of this option is on sharing software.

An analog signal is a continuous electric wave that represents information by varying its amplitude, frequency, or phase. It is used to transmit audio, video, and other types of data. Analog signals are characterized by their ability to have an infinite number of values within a given range, allowing for smooth and continuous representation of data. The term "analog" is often used interchangeably with "analogue" to refer to this type of signal.

A bit is the smallest unit of information in computing and can have a value of either 1 or 0. A binary number is a number expressed in the base-2 numeral system, which uses only two digits, 1 and 0. Therefore, both a bit and a binary number consist of two signals, 1 or 0.

Analog signals are slower than digital signals. This is because analog signals are continuous and can have infinite values, while digital signals are discrete and have a limited number of values. In digital signals, information is encoded into binary code, which allows for faster transmission and processing. Therefore, the correct answer is "analog" as it is slower than digital signals.

A coaxial cable is used in our home to give access to cable TV.