Question Discussion & Solution

The correct answer is Ctrl + B.

Key Points

• Ctrl + B is the shortcut key to make the selected letters bold or unbold.
• Important Shortcut keys used in MS Word:
  • Cut the selected content to the Clipboard - Ctrl+X
  • Copy the selected content to the Clipboard - Ctrl+C
  • Paste the contents of the Clipboard -Ctrl+V
  • Increase the font size by 1 point.- Ctrl+]
  • Center the text - Ctrl+E.
  • Align the text to the left - Ctrl+L

The correct answer is option 3 i.e ​Ctrl + Z.

• Ctrl + Z is the shortcut key to undo an action in MS Word.
• Ctrl+W is the shortcut key to close the current window.
• Ctrl+B is the shortcut key to Bold highlighted text.
• Ctrl + U is the shortcut key to underline a text.

The correct answer is DBMS.

Key Points

• A Database is an organized collection of data so that it can be easily accessed and managed.
• DBMS stands for Database Management System.
• A Database Management System (DBMS) is software designed to store, retrieve, define, and manage data in a database.
• Database Management System removes redundancy and Integrity.
• Database Management System reduces Application Development Time.
• DBMS follows the concepts of Atomicity, Consistency, Isolation, and Durability (normally shortened as ACID).
• DBMS supports a multi-user environment and allows them to access and manipulate data in parallel. 
• Types of DBMS Systems are:
  • Hierarchical Database
  • Network Database
  • Relational Database
  • Object-Oriented Database
• The three-schema architecture of DBMS:

• Some popular DBMS systems:
  • MySQL
  • Microsoft Access
  • Oracle
  • LibreOffice Base
  • Microsoft SQL Server

​Important Points 

• In 1960, Charles Bachman designed the first DBMS system.
• In 1970, Codd introduced IBM'S Information Management System (IMS)
• In 1976, Peter Chen coined and defined the Entity-relationship model also know as the ER model.
• In 1991, Microsoft ships MS Access, a personal DBMS and that displaces all other personal DBMS products.

​​​​ Additional Information 

• Operating System
  • ​An operating system acts as an intermediary between the user of a computer and computer hardware.
  • Operating systems were first developed in the late 1950s to manage tape storage.
  • The General Motors Research Lab implemented the first OS in the early 1950s for their IBM 701.
  • Operating System allows disk access and file systems Device drivers Networking Security.
  • Operating System Handling I/O operations.
  • Operating System has error detection and handling technic.
  • An Operating System is concerned with the allocation of resources and services, such as memory, processors, devices, and information. 
  • The Kernel is the central component of a computer operating system.
• ​Compiler
  • The compiler translates source code written in a high-level language into a set of machine-language.
  • Compilers are very large programs, with error-checking and other abilities.
  • The object code is machine code that the processor can perform one instruction at a time.
  • The first Autocode and compiler in the modern sense were developed by Alick Glennie in 1952.
  • John W. Backus at IBM introduced the first commercially available compiler, in 1957.

The correct answer is .HTM or .HTML.

Key Points

• Web pages use .HTM or .HTML file extensions.
  • A file extension or file name extension is the ending of a file that helps identify the type of file in operating systems.
  • In Microsoft Windows, the file name extension is a period that is often followed by three characters but may also be one, two, or four characters long.
  • A filename extension is often between one and three characters and is always at the end of the file name, starting with a period.

Additional Information

• A JPG file is an image saved in a compressed image format standardized by the Joint Photographic Experts Group (JPEG).
  • It is commonly used for storing digital photos and used by most digital cameras to save images.
  • JPG files are among the most common image files, along with .PNG, TIF, and .GIF.
• A DOC file is a word processing document created by Microsoft Word.
  • It may contain formatted text, images, tables, graphs, charts, page formatting, and print settings.
  • DOC files are created to save various documents, including letters, resumes, essays, and invitations.
• A JS file is a text file containing JavaScript code that is used to execute JavaScript instructions on web pages.
  • It may include functions that open and close windows, validate form fields, enable rollover images, or create dropdown menus.
  • JS files are referenced by web pages that incorporate JavaScript functions.

The correct answer is Application software

Important Points

• MS Office, Photoshop, and Animagic are examples of Application software
• MS Office is a software bundle provided by Microsoft.
• It includes software like MS Word, MS Excel, MS Powerpoint, MS Outlook, MS Access, MS One Note, and others.

Additional Information

• Photoshop is a powerful photo editing tool by Adobe.
• An Operating System (OS) is an interface between a computer user and computer hardware.
• An operating system is software that performs all the basic tasks like file management, memory management, process management, handling input and output, and controlling peripheral devices such as disk drives and printers.