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Questions and Answers
What is the maximum capacity of a two-layered DVD?
What is the maximum capacity of a two-layered DVD?
Which storage device is commonly known as BD-ROM?
Which storage device is commonly known as BD-ROM?
What is the maximum capacity of a Blu-ray disc with dual layer?
What is the maximum capacity of a Blu-ray disc with dual layer?
Which storage device acts as a buffer between the CPU and main memory to speed up the CPU?
Which storage device acts as a buffer between the CPU and main memory to speed up the CPU?
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What is the maximum capacity of a Holographic Versatile Disc (HVD)?
What is the maximum capacity of a Holographic Versatile Disc (HVD)?
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Which storage device is often referred to as pen drives, thumb drives, or jump drives?
Which storage device is often referred to as pen drives, thumb drives, or jump drives?
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What is the function of the Escape Key on a computer keyboard?
What is the function of the Escape Key on a computer keyboard?
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Who designed the first general-purpose programmable processor INTEL 4004?
Who designed the first general-purpose programmable processor INTEL 4004?
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Which type of scanner captures images from printed material and converts them into digital format?
Which type of scanner captures images from printed material and converts them into digital format?
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Which company made the Universal Automatic Computer, the first commercially available computer?
Which company made the Universal Automatic Computer, the first commercially available computer?
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What does a Joy Stick primarily help in moving on a computer screen?
What does a Joy Stick primarily help in moving on a computer screen?
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Who is known as the Father of Computer?
Who is known as the Father of Computer?
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Which keys on a computer keyboard are known as function keys?
Which keys on a computer keyboard are known as function keys?
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Which generation of computers used vacuum tubes as electronic components?
Which generation of computers used vacuum tubes as electronic components?
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What type of device is a Track Ball commonly used in?
What type of device is a Track Ball commonly used in?
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Who is considered the Father of Modern Computer Science?
Who is considered the Father of Modern Computer Science?
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How does a mouse sense movement and send signals to the CPU?
How does a mouse sense movement and send signals to the CPU?
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Which computer is associated with being the First General Purpose Electronic Digital Computer?
Which computer is associated with being the First General Purpose Electronic Digital Computer?
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What group in the Insert Tab is used for inserting tables into a document?
What group in the Insert Tab is used for inserting tables into a document?
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Which group under the Design Tab allows users to change colours, fonts, and effects for the document all at once?
Which group under the Design Tab allows users to change colours, fonts, and effects for the document all at once?
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What is the function of the Clipboard Group under the control groups?
What is the function of the Clipboard Group under the control groups?
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Which group under the Layout Tab is responsible for arranging document pages?
Which group under the Layout Tab is responsible for arranging document pages?
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In which group can you find features like Equation and Symbol for inserting equations and symbols into a document?
In which group can you find features like Equation and Symbol for inserting equations and symbols into a document?
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What is the purpose of the Pages Group under the Insert Tab?
What is the purpose of the Pages Group under the Insert Tab?
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At which level of abstraction is the data physically stored in detail?
At which level of abstraction is the data physically stored in detail?
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Which level of abstraction describes what data is stored and the relationship among that data?
Which level of abstraction describes what data is stored and the relationship among that data?
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Which key uniquely identifies each record in a database table?
Which key uniquely identifies each record in a database table?
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What is a Super Key in a database table?
What is a Super Key in a database table?
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What type of keys are used to speed up data accessing and create links between different tables?
What type of keys are used to speed up data accessing and create links between different tables?
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Which level of abstraction is viewed by the user in terms of tables and relations?
Which level of abstraction is viewed by the user in terms of tables and relations?
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Study Notes
Computers
- The first commercially available computer was UNIVAC, made by the Eckert-Mauchly Computer Company, marking the birth of modern computers.
- Intel Corporation designed the first general-purpose programmable processor, INTEL 4004, in 1969.
Generations of Computers
- First Generation (1946-1959): Used vacuum tubes, occupied large spaces, and performed computations in milliseconds. Examples include EDSAC, EDVAC, UNIVAC, IBM-701, and IBM-650.
- Second Generation (1959-1965): Replaced vacuum tubes with transistors.
Storage Devices
- DVD (Digital Versatile Disc): A device used to store data in large amounts, holding approximately 17GB of video, sound, or other data.
- Blu-ray Disc (BD-ROM): An upgraded version of CD and DVD discs, with a maximum capacity of 25GB (single layer) and 50GB (dual layer).
- Holographic Versatile Disc (HVD): A holographic storage format with a maximum capacity of 3.9 terabytes.
- Flash Drives: Small, ultra-portable storage devices connecting to computers via a built-in USB plug, with storage capacities ranging from 8GB to 64GB.
- Zip Disks: An advanced version of floppy disks, developed by Iomega, available in 100, 250-MB, and 750-MB capacities.
Memory and Input/Output Devices
- Cache Memory: A high-speed semiconductor memory that acts as a buffer between the CPU and main memory.
- Virtual Memory: Permits software to use additional memory by utilizing the hard disk drive (HDD) as temporary storage.
- Mouse: A pointing and cursor-control device with two or three buttons (left, right, and middle).
- Joy Stick: Used to move the cursor position, mainly in Computer Aided Design (CAD) and gaming.
- Track Ball: Mostly used in notebooks or laptops, with a ball that senses movement and sends signals to the CPU.
- Scanner: Captures images from printed material and converts them into digital format, with types including Flatbed Scanners, Hand Scanners, and Sheetfed Scanners.
Database Management Systems (DBMS)
- Physical Level/Internal Level: Describes how data is physically stored, using methods like B+ tree and Hash file organization.
- Logical Level/Conceptual Level: Describes what data is stored and the relationships among it, with database administrators working at this level.
- View Level/External Level: The highest level of abstraction, viewed by the user in terms of tables and relations, describing a part of the entire database and hiding logical level details.
Keys in DBMS
- Key: A field in the database table used to retrieve and sort rows, speeding up data access and creating links between tables.
- Super Key: A set of one or more attributes that uniquely determine each entity in the database table, a subset of a candidate key.
- Candidate Key: A set of columns from which a primary key can be selected to identify each record.
- Primary Key: A special key that uniquely identifies each record in the table.
Microsoft Office
- Clipboard Group: Copy, Paste, Cut, and Format Painter.
- Font Group: Font style, color, and size, with options for Bold, Underline, and Strikethrough.
- Paragraph Group: Bullets and Numbering, Alignment, Shading, Borders, and Line spacing.
- Style Group: Listed Styles.
- Editing Group: Find, Replace, etc.
Insert Tab
- Pages Group: Cover page, Blank page, and Page break.
- Tables Group: Tables.
- Illustrations Group: Pictures, Shapes, Smart Art, etc.
- Media and Links Group: Hyperlink, Bookmark, etc.
- Header and Footer Group: Page number, Header, Footer.
- Text Group: Text Box, Word Art, etc.
- Symbol Group: Equation, Symbol.
Design Tab
- Themes: Change colors, fonts, and effects for the document.
- Style Set gallery: Change styles.
- Paragraph Spacing: Adjust paragraph spacing.
- Effects: Apply effects to the document.
- Page Background group: Watermark, page color, and page borders.
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Description
Test your knowledge on different keys on a computer keyboard including Alt, Function keys, and Escape key. Learn about their functions and how they can be used for keyboard shortcuts and commands.
