Podcast
Questions and Answers
Which shortcut key combination hides the entire row in a spreadsheet?
Which shortcut key combination hides the entire row in a spreadsheet?
- CTRL + C
- CTRL + -
- CTRL + 0
- CTRL + 9 (correct)
Which of the following transmission types allows data to flow in both directions but not simultaneously?
Which of the following transmission types allows data to flow in both directions but not simultaneously?
- Duplex
- Simplex
- Full-duplex
- Half-duplex (correct)
Which network device operates at the transport layer of the OSI model and is responsible for segmenting data?
Which network device operates at the transport layer of the OSI model and is responsible for segmenting data?
- Bridge
- Switch
- Router (correct)
- Hub
Which technique combines multiple input signals into one composite signal for better transmission efficiency?
Which technique combines multiple input signals into one composite signal for better transmission efficiency?
Which reliable transport protocol is known for its error detection and flow control?
Which reliable transport protocol is known for its error detection and flow control?
What is the name of the register that tracks the next instruction to be executed?
What is the name of the register that tracks the next instruction to be executed?
What does UDP stand for in networking protocols?
What does UDP stand for in networking protocols?
What type of communication allows data to flow in only one direction?
What type of communication allows data to flow in only one direction?
Which protocol is best suited for file transfers between devices?
Which protocol is best suited for file transfers between devices?
Which of the following components is considered a Layer 2 device in network communications?
Which of the following components is considered a Layer 2 device in network communications?
What is the Internet service that provides a multimedia interface to available resources?
What is the Internet service that provides a multimedia interface to available resources?
Which domain is typically used by for-profit businesses?
Which domain is typically used by for-profit businesses?
Which of the following correctly identifies a collection of web pages and the first page opened on a website?
Which of the following correctly identifies a collection of web pages and the first page opened on a website?
What is an example of a half-duplex communication system?
What is an example of a half-duplex communication system?
Which of the following is not a version of Windows?
Which of the following is not a version of Windows?
In MS Excel, which shortcut keys are used to create a formula to sum all cells?
In MS Excel, which shortcut keys are used to create a formula to sum all cells?
Which layer of the OSI model handles addressing and routing messages between different networks?
Which layer of the OSI model handles addressing and routing messages between different networks?
On which layer of the OSI model does a gateway operate?
On which layer of the OSI model does a gateway operate?
Which symbol must be used before a formula in an Excel sheet?
Which symbol must be used before a formula in an Excel sheet?
What is the shortcut key for centering alignment of text in MS Office software?
What is the shortcut key for centering alignment of text in MS Office software?
Which server is primarily used to host websites?
Which server is primarily used to host websites?
What is used to allocate and manage resources for a network?
What is used to allocate and manage resources for a network?
What set of attributes uniquely identifies a record?
What set of attributes uniquely identifies a record?
What does a double rectangle represent in ER diagrams?
What does a double rectangle represent in ER diagrams?
Which type of printer uses pins striking an ink ribbon?
Which type of printer uses pins striking an ink ribbon?
What is the main purpose of a Trojan horse?
What is the main purpose of a Trojan horse?
Which type of memory appears as main storage but is mostly supported by secondary storage?
Which type of memory appears as main storage but is mostly supported by secondary storage?
What is used by floppy drives, hard drives, and tape drives to read data?
What is used by floppy drives, hard drives, and tape drives to read data?
What type of memory typically stores data for a short amount of time?
What type of memory typically stores data for a short amount of time?
What is often a characteristic of multi-valued attributes in data modeling?
What is often a characteristic of multi-valued attributes in data modeling?
In which type of printer is printing achieved by deflecting a laser beam onto a photosensitive surface of a drum?
In which type of printer is printing achieved by deflecting a laser beam onto a photosensitive surface of a drum?
What is another term for the main memory of a computer?
What is another term for the main memory of a computer?
Which of the following is considered a primary input device for a computer?
Which of the following is considered a primary input device for a computer?
Which type of computer monitor uses an electron beam to create an image on the screen?
Which type of computer monitor uses an electron beam to create an image on the screen?
What do we call the place where accessories are connected in a computer?
What do we call the place where accessories are connected in a computer?
How many bits are equal to 1 Byte?
How many bits are equal to 1 Byte?
What is the popular name for a flash drive?
What is the popular name for a flash drive?
Which statement about EPROM is correct?
Which statement about EPROM is correct?
Which of the following consists of an electronic writing area and a special 'pen' that works with it?
Which of the following consists of an electronic writing area and a special 'pen' that works with it?
Which of these is a type of computer peripheral?
Which of these is a type of computer peripheral?
Which type of memory is non-volatile?
Which type of memory is non-volatile?
The primary memory of a personal computer consists of which of the following?
The primary memory of a personal computer consists of which of the following?
In which type of memory are the boot sector files stored?
In which type of memory are the boot sector files stored?
Which statement is correct regarding the main memory of a computer?
Which statement is correct regarding the main memory of a computer?
Which type of memory has the fastest access speed?
Which type of memory has the fastest access speed?
Which statement about cache memory is not correct?
Which statement about cache memory is not correct?
Which type of ROM can be erased and reprogrammed by ultraviolet light?
Which type of ROM can be erased and reprogrammed by ultraviolet light?
What is the typical size of a computer accumulator register?
What is the typical size of a computer accumulator register?
Which of the following is an example of volatile memory?
Which of the following is an example of volatile memory?
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Study Notes
Printer Technology
- Printing is achieved by deflecting a laser beam onto a photosensitive surface in Laser printers.
- Dot Matrix printers use a print head with pins striking an ink ribbon for character production.
Memory Concepts
- Main memory can be referred to as primary storage, internal memory, or primary memory.
- Flash drives are commonly known as pen drives; they are portable storage devices.
- Memory types can be categorized as volatile (e.g., RAM) and non-volatile (e.g., ROM).
Input and Output Devices
- The keyboard serves as a primary input device for computers, while monitors display output.
- Cathode Ray Tube (CRT) monitors use an electron beam to create images on the screen.
- Ports are designated connections on a computer for accessories.
Shortcuts and Formatting in Software
- In MS-Excel, the shortcut Alt+= allows users to quickly create a formula for summing all selected cells.
- To hide an entire row, the shortcut is CTRL + 9.
Networking and OSI Model
- The Network layer is responsible for addressing and routing messages across different networks, while a Gateway operates on this layer.
- Multiplexing combines multiple input signals for efficient transmission.
Storage and Data Management
- Data Registers keep track of the next instruction to be executed, and the Program Counter also plays a pivotal role in instruction sequencing.
- Cache memory is faster than RAM and is used for short-term data storage, enhancing access speed to frequently used information.
Cybersecurity
- A Trojan horse primarily aims to steal sensitive information from computer systems.
Web and Internet Basics
- Websites consist of collections of web pages; the first page viewed is the home page.
- .com domains are typically used by for-profit businesses.
RAM and ROM
- RAM is volatile; it requires a continuous power supply to retain data.
- EPROM allows data to be erased using ultraviolet light and reprogrammed by the user or manufacturer.
Additional Facts
- The size of a computer's accumulator register is typically 5 bytes.
- Half-duplex systems allow communication in both directions, but only one direction at a time, exemplified by walkie-talkies.
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