Compression and Virtualization Basics Quiz

False (B)

Lossy Audio Compression and Lossless Audio Compression

<p>Lossy</p> Signup and view all the answers

<p>Lossy Audio Compression = Removes audio information Lossless Audio Compression = No loss of audio quality Lossy Video Compression = Decreases video resolution Lossless Video Compression = No loss of visual quality</p> Signup and view all the answers

<p>Lagarith (B)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>Run multiple servers on one hardware and run applications from a virtualised server.</p> Signup and view all the answers

<p>Improved performance by caching content globally (A)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>Redundant Array of Inexpensive Disks</p> Signup and view all the answers

<p>pixels</p> Signup and view all the answers

<p>NAS = Network Attached Storage allowing file access over a network SAN = Storage Area Network providing access to consolidated block storage Cloud storage = Storing data on a remote server accessible via the internet Hosted storage = Data storage managed by a third-party service provider</p> Signup and view all the answers

<p>It removes some clarity by merging similar colors. (D)</p> Signup and view all the answers

<p>Reduced downtime (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>Creating virtual versions of physical devices or resources</p> Signup and view all the answers

<p>Complexity and initial costs</p> Signup and view all the answers

<p>infrastructure costs</p> Signup and view all the answers

<p>Virtual Storage = Combination of physical storage from multiple devices Hosted Instance = Virtual machine on cloud infrastructure SaaS = Software offered on demand over the internet Clustering = Set of computers working together as a single system</p> Signup and view all the answers

<p>On-demand resources (B)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>Office 365</p> Signup and view all the answers

<p>They can be easily scaled without loss of quality. (A)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>Space Per Frame x Frame Rate</p> Signup and view all the answers

<p>1024</p> Signup and view all the answers

<p>Characters = Number of Characters x 8 Sound = Sample Rate x Sample Resolution x Length Graphics = Rows x Columns x Bits Per Pixel Video = Space Per Frame x Frame Rate</p> Signup and view all the answers

<p>60 MB (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>6 KB</p> Signup and view all the answers

<p>Automated backup and disaster recovery services (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>immutability</p> Signup and view all the answers

<p>IT</p> Signup and view all the answers

<p>Business Continuity = Ensures data protection and recovery options Collaboration = Enables real-time teamwork from different locations Updates and Maintenance = Reduces burden on IT teams Cost Saving = Decreases expenses related to infrastructure</p> Signup and view all the answers

<p>Consensus mechanics (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>Creation of private and permissioned blockchain networks</p> Signup and view all the answers

<p>2.88 TB (D)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>960 MB</p> Signup and view all the answers

<p>4</p> Signup and view all the answers

<p>1.0 GB (A)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>Points of Presence (PoP) = Geographically strategic server locations Content Caching = Facilitates downloading or streaming of content Latency = Delay in data transmission User Experience = Quality of interaction with the service</p> Signup and view all the answers

<p>By monitoring data usage and serving content from geographically closer servers.</p> Signup and view all the answers

<p>255 (C)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>8192</p> Signup and view all the answers

<p>sample rate</p> Signup and view all the answers

<p>Byte = 8 Bits Terabyte = 1024 GB Gigabyte = 1024 MB Kilobyte = 1024 B</p> Signup and view all the answers

<p>1 bpp can represent 2 colors. (C)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>bitmap</p> Signup and view all the answers

<p>Improved performance by reducing time to send/retrieve data (B)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>Redundant Array of Inexpensive Disks</p> Signup and view all the answers

<p>NAS = Allows centralized file storage accessible over a network SAN = Provides block-level storage for high-performance applications Cloud storage = Offers scalable storage options with remote access Hosted storage = Maintains data on servers managed by a third party</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>It helps to optimize resources and prevent storage overruns.</p> Signup and view all the answers

<p>2.4 TB (C)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>960 MB</p> Signup and view all the answers

<p>Lagarith (D)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>Uncompressed frame storage = 5 MB Sound and metadata = 20 MB Total length of video = 120 seconds Frame rate = 60 fps</p> Signup and view all the answers

<p>Reduced latency (B)</p> Signup and view all the answers

<p>To compress graphical data without sacrificing any visual quality.</p> Signup and view all the answers

<p>multiple</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>Lossy Audio Compression = Removes some audio information Lossless Audio Compression = No audio quality sacrifice</p> Signup and view all the answers

<p>Running multiple servers on one piece of hardware (C)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>H.264 or H.265</p> Signup and view all the answers

<p>Automated backup and disaster recovery (C)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>Consensus mechanics</p> Signup and view all the answers

<p>IT</p> Signup and view all the answers

<p>Immutability = Data cannot be altered or deleted Transparency = An auditable record of all transactions Interoperability = Ability to interact with other blockchain networks Decentralisation = No single point of failure</p> Signup and view all the answers

<p>Google Docs (C)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>Decentralisation</p> Signup and view all the answers

<p>Ease of backup and data recovery (C)</p> Signup and view all the answers

<p>Complexity requiring specialized skills</p> Signup and view all the answers

<p>internet</p> Signup and view all the answers

<p>Virtual Storage = Combination of storage from multiple devices appearing as one Hosted Instance = Virtual machine hosted on cloud infrastructure Cloud Storage = Accessing resources via the internet Clustering = Multiple computers working as one system</p> Signup and view all the answers

<p>Economies of scale in infrastructure (D)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>Software as a Service (SaaS)</p> Signup and view all the answers

The number of frames displayed per second in a video or animation.

Calculating the total storage needed to record gameplay given frames per second, video duration, and storage required per frame.

A geographically distributed group of servers that work together to deliver internet content quickly.

A server location within a content delivery network.

The delay in delivering content.

A CDN speeds up the loading of a news website by distributing server access geographically.

Calculating the total storage size of a video considering storage per frame and audio/metadata requirements

The speed at which audio is sampled for a recording.

A system of distributed servers that store copies of website content. Users access the content from the server geographically closest to them.

Data stored using only 0s and 1s (bits).

A method of storing data on multiple hard drives to improve reliability and performance.

A device that provides storage over a network.

Data compression that discards some data to reduce file size.

Images made up of small squares (pixels) like a grid.

Storing data on remote servers accessed over a network.

A dedicated server instance that's managed and maintained by a third party or provider but doesn't provide any specific type of service or function.

A method of compressing graphic data without losing any visual quality.

A type of audio compression that removes some audio information, usually imperceptible to the human ear.

Audio compression that keeps all audio information without quality loss.

Video compression that removes some video details to reduce storage or transmission size, acceptable to the human eye.

Video compression that preserves all original video details.

Reducing the size of video data for storage or transmission without sacrificing quality.

Reducing the size of audio files for storage or transmission.

Creating a virtual instance of a resource (e.g., a server), enabling multiple functions from a single physical piece of hardware.

Use geometric shapes (points, lines, curves) defined by mathematical expressions to represent images.

Calculating the amount of space needed to store a file.

Multiply the number of characters by 8 to get the file size in bytes.

Multiply sample rate, sample resolution and length to get file size in bytes.

Multiply rows, columns, and bits-per-pixel to get file size in bytes.

Divide the file size in bytes by 1024 to convert it to kilobytes, then continue dividing by 1024 to get megabytes or higher units.

Calculate the total size of a movie by multiplying storage per frame by the frame rate and the duration of the file in seconds.

Calculate the total size of a movie by adding the sound to the movie file size found in previous step. This calculation requires the storage per second and frame rate of the movie.

Combining physical storage from multiple devices to create a single, centrally managed storage pool.

Reduced upfront and ongoing hardware costs by sharing storage resources efficiently across multiple devices.

May require specialized skills to configure and manage, which can be costly.

A group of computers working together as a single system to boost processing power and storage capacity.

Saving on hardware, data centers, and benefiting from cost efficiency through economies of scale.

Adjusting computing resources (servers, storage) based on your needs.

Cloud providers offer automated backups and disaster recovery, ensuring data protection and quick restoration in case of loss or system failures.

Cloud-based tools, such as Office 365 and Google Docs, enable real-time communication and collaboration among team members, regardless of location.

Providers handle software updates, security patches, and maintenance, reducing IT burden and ensuring system security and up-to-dateness.

A decentralized and secure way to store data in a distributed ledger format, using cryptography, consensus mechanics, and decentralization.

A decentralized database containing information about transactions between multiple parties.

A protocol that brings all nodes in a blockchain network to agree on a single dataset.

Blockchain allows for the creation of private and permissioned networks, where data access is controlled, enhancing privacy and security.

Blockchain eliminates the need for centralized infrastructure, reducing maintenance costs.

A bit is the smallest unit of binary data. It can represent either a 0 or a 1.

A byte consists of 8 bits. It can represent a character or a number.

Characters are stored using the ASCII table, where each character is represented by a unique 8-bit binary number.

The sample rate determines how many times per second the audio signal is measured and converted into digital data to store sound.

A raster image is made up of a grid of pixels, each pixel representing a color.

The number of bits per pixel (bpp) determines the maximum number of colors that can be displayed.

A vector image is created using mathematical equations to define shapes and lines.

Raster images are made up of pixels and can lose quality when scaled, while vector images are based on mathematical equations and can be scaled without losing quality.

A technique that combines multiple hard drives to improve reliability and performance by distributing data across them.

A device connected to a network that provides centralized storage for computers on the network.

A system that ensures continuous data access even if one component fails, minimizing downtime.

A dedicated network that connects storage devices directly to servers, allowing high-speed data transfer.

Storing data on remote servers accessed over the internet, managed by a third-party provider.

A service that provides storage space and management on a third-party server.

Creating virtual instances of resources like servers, allowing multiple operations on a single physical hardware.

A dedicated server instance managed by a third party but doesn't provide specific services or functions.

CDNs use strategically placed servers called Points of Presence (PoPs) to cache content geographically. When a user requests content, the CDN directs them to the nearest PoP, reducing the distance data needs to travel.

Latency is the time delay between a request for content being made and the content being received by the user. CDNs help reduce latency by delivering content from servers located geographically closer to the user.

CDNs improve website performance by delivering content faster, especially for global audiences. They reduce the amount of data that needs to travel long distances, resulting in faster page loading and improved user experience.

The storage space needed for a video is calculated by multiplying the storage required per frame by the total number of frames, which depends on the video's frame rate and duration.

The storage size of a single frame depends on the video's resolution and format. For example, a 4K video frame might require 8MB, while a 1080p frame might use 2MB.

A technology that combines physical storage from multiple devices into a single, centrally managed pool.

Reduced cost, less downtime, and easy scalability.

Complexity and initial investment cost.

A broader service offered by a third-party provider, like Software as a Service (SaaS).

Cost-saving, scalability, and improved security.

Combining multiple computers to function as a single, more powerful system.

A compression method that reduces the size of data without losing any information. It achieves this by finding patterns and redundancies in the data and storing them more efficiently.

A software program or algorithm used to compress and decompress data, such as audio or video files. It determines how information is encoded and decoded for storage and transmission.

Common lossy audio compression codecs include MP3, AAC, and Opus. These codecs achieve smaller file sizes by removing some audio information that is typically inaudible to the human ear.

Common lossy video compression codecs include H.264, H.265, and VP9. These codecs reduce video file sizes by removing some visual details that are less noticeable to the human eye.

Cloud services offer automated backups and disaster recovery. This ensures your data is protected and can be quickly restored in case of data loss or system failures.

Tools like Office 365 and Google Docs allow teams to work together on documents in real-time, regardless of location.

Cloud providers handle software updates, security patches, and maintenance, taking the burden off your IT team.

A decentralized database that holds information about transactions between different parties, making it transparent and auditable.

Protocols that ensure all nodes in a blockchain network agree on the same data. It maintains consistency and prevents manipulation.

Blockchain offers privacy, security, and cost-effectiveness by allowing for the creation of private networks, eliminating centralized infrastructure, and enhancing transparency.

Data stored on a blockchain cannot be altered or deleted. This makes it a very secure and reliable way to store information.