Computer Knowledge PYQs

The correct answer is Packet switching

Important Points

• The internet uses packet switching method. It groups the data into some small-sized packets and then the data is sent according to each packet separately.

Key Points

• Packet Switching transmits data across digital networks by breaking it down into blocks or packets for more efficient transfer using various network devices.

Each time one device sends a file to another, it breaks the file down into packets so that it can determine the most efficient route for sending the data across the network at that time. The network devices can then route the packets to the destination where the receiving device reassembles them for use.

• Circuit switching is the most familiar technique used to build a communications network. It is used for ordinary telephone calls. It allows communications equipment and circuits, to be shared among users.

Each user has sole access to a circuit (functionally equivalent to a pair of copper wires) during network use. Consider communication between two points A and D in a network. The connection between A and D is provided using (shared) links between two other pieces of equipment, B and C.

The correct answer is A collection of linked information residing on computers connected by the Internet

Important Points 

• World Wide Web or www is the name given to all the information available on the internet around the globe which is accessed by different devices connected to that internet.

Key Points

• In 1989 the world wide web was invented by Sir Tim Berners-Lee. He was trying to find a new way for scientists to easily share the data from their experiments.
• Hypertext and the internet already existed at this point but no one had thought of a way to use the internet to link one document directly to another.
• Tim suggested three main technologies that meant all computers could understand each other (HTML, URL, and HTTP). All of these remain in use today.
• He also made the world’s first web browser and the webserver. You can still see pages from the first web server online.

Additional Information

• HTML (HyperText Markup Language) The publishing format for the web. It includes the ability to format documents and link to other documents and resources.
• URL (Uniform Resource Locator) The URL is a kind of 'address' that is unique to each resource on the web. It could be the address of a webpage or an image file.
• HTTP (Hypertext Transfer Protocol) Allows HTML documents to be requested and transmitted between browsers and web servers via the internet.
• Web server A computer where files are stored which can be accessed via the internet using HTTP.

The correct answer is DEL

Key Points

• The del command is a Command Prompt command used to delete files. Various command options are available so that you can remove files that have a certain file extension, delete every file in a folder, get rid of only the files with certain file attributes, and more.

• Unlike deleting files normally, data removed with the del command doesn't end up in Recycle Bin.

• The del command is available from within the Command Prompt in Windows 10, Windows 8, Windows 7, Windows Vista, and Windows XP operating systems.

• It can also be used in Command Prompt in the Advanced Startup Options and System Recovery Options repair/recovery menus.

• In Recovery Console in Windows XP and Windows 2000, the delete Recovery Console command can be used instead.

The default extension for any MS word file is “.doc”. Although in newer versions, the file extension “.docx” can also be seen. This file extension can be changed by using the “save as” option.

GUI stands for Graphical User Interface which allows users to interact with electronic devices with the help of graphical icons and visual indicators.

GUIs are also used in mobile devices like MP3 players, media players (portable), gaming devices and smartphones.

An emoticon/smiley is a pictorial representation of a facial expression using punctuation marks, numbers and letters, usually written to express a person's feelings or mood. As social media has become widespread, some devices now prov

ide stylized pictures that do not use punctuation.

CTRL + F12 help to open dialogue box. Which is used to open saved file from the computer.

External devices such as printers, keyboards and modems are known as peripherals or external devices. 

Message switching is a network switching technique in which data is routed in its entirety from the source node to the destination node, one hope at a time. During message routing, every intermediate switch in the network stores the whole message. If the entire network's resources are engaged or the network becomes blocked, the message-switched network stores and delays the message until ample resources become available for effective transmission of the message. 

When the user has ample amount of text in a word document, it is fairly difficult to find a specific word or a phrase in it. For this, the user can access the “find” command by pressing the shortcut “Ctrl+F” in MS word.

The correct answer is A printer

• The printer is not a storage device. A printer is an external hardware output device that takes the electronic data stored on a computer or other device and generates a hard copy or printed paper.

Key Points

• A computer storage device is any type of hardware that stores data. The most common type of storage device, which nearly all computers have, is a hard drive. The computer's primary hard drive stores the operating system, applications, and files and folders for users of the computer.
• While the hard drive is the most ubiquitous of all storage devices, several other types are common as well. Flash memory devices, such as USB keychain drives and iPod Nanos are popular ways to store data in a small, mobile format. Other types of flash memory, such as compact flash and SD cards are popular ways to store images taken by digital cameras.

F12 is the short cut key that is used to open save as file window in Microsoft office..

Microsoft’s windows live messenger is a discontinued instant messaging client developed by Microsoft. It was used to communicate directly between persons over internet.

File Transfer Protocol is the standard protocol using which the files are exchanged on the network.

The correct answer is Option 4.

The shortcut key Ctrl+F in Word is used to open the Find Box. User can find character/word from this option.

• Ctrl+N - Create a new document
• Ctrl+O - Open an existing document
• Ctrl+S - Save a document
• F12 - Open the Save As dialog box
• Ctrl+W - Close a document
• Ctrl+Z - Undo an action
• Ctrl+Y - Redo an action
• Alt+Ctrl+S - Split a window or remove the split view
• Ctrl+F - Search a document

The correct answer is Scroll Bar

Important Points

• A Scroll bar is a vertical or horizontal bar commonly located on the far right or bottom of a window that allows you to move the window viewing area up, down, left, or right. It is used to scroll up and down on almost every Internet web page. Scroll bars are utilized using the mouse, touchpad, or keyboard.

Key Points

• A vertical or horizontal bar commonly on the far right or bottom of a window that allows you to move the window viewing area up, down, left, or right. Most people today are familiar with scroll bars because of the need to scroll up and down on almost every Internet web page.
• Below is an image of a Microsoft Windows window with a vertical and horizontal scroll bar.

The Operating system is also known as system software and it acts as a platform for interaction between the hardware and the user. The OS paves the way for the application software to run on the system.

Auto correct is a feature in many applications, including word processing programs, spreadsheets and search engines that will automatically detect and correct typos, misspelled words, and incorrect capitalization.

The correct answer is double click on it

Important Points

• Windows Explorer is the file manager used by Windows 95 and later versions. It allows users to manage files, folders, and network connections, as well as search for files and related components. Windows Explorer has also grown to support new features unrelated to file management such as playing audio and videos and launching programs, etc. The desktop and the taskbar also form part of Windows Explorer. The look, feel and functionalities of Windows Explorer have been enhanced with each version of Windows.
• Starting with Windows 8.0, Windows Explorer has been called File Explorer.

Additional Information

• Windows Explorer replaced the programs File Manager and Program Manager that were used before Windows 95. In addition to file management, Windows Explorer also provides shell services as well as manages the desktop, the Start menu, and the taskbar.
• Windows Explorer should not be confused with Internet Explorer. The former is a file browser, whereas the latter is a Web browser. There are different ways to run Windows Explorer: one is by holding down the Windows button on the keyboard (the button with the Windows logo) and then pressing the "E" key. Another way is by clicking the Start menu and then "Run" and then typing in "explorer" in the dialog box that appears.
• Starting with Windows 8, the Ribbon interface was introduced to Windows Explorer, now called File Explorer. This feature provides users with all the commands needed for file access and file management.

The correct answer is Mouse, Keyboard, Scanner

• An input device is any hardware device that sends data to a computer, allowing you to interact with and control it. The picture shows a Logitech trackball mouse, which is an example of an input device.
• The most commonly used or primary input devices on a computer are the keyboard and mouse. However, there are other devices that input data into a computer.

Additional Information

• Following are the types of Input Devices:
• Audio conversion device
• Barcode reader
• Biometrics (e.g., fingerprint scanner).
• Business card reader
• Digital camera and digital camcorder.
• EEG (electroencephalography)
• Finger (with touch screen or Windows Touch).
• Gamepad, joystick, paddle, steering wheel, and Microsoft Kinect.
• Gesture recognition
• Graphics tablet
• Keyboard
• Light gun
• Light pen
• Magnetic ink (like the ink found on checks).
• Magnetic stripe reader
• Medical imaging devices (e.g., X-ray, CAT scan, and ultrasound images).
• Microphone (using voice speech recognition or biometric verification).
• MIDI keyboard
• MICR
• Mouse, touchpad, or other pointing devices.
• OMR (optical mark reader)
• Paddle
• Pen or stylus
• Punch card reader
• Remote
• Scanner
• Sensors (e.g., heat and orientation sensors).
• Sonar imaging devices
• Stylus (with touch screen).
• Touch screen
• Voice (using voice speech recognition or biometric verification).
• Video capture device
• VR helmet and gloves
• Webcam
• Yoke