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WorksheetsWJEC GCE Digi Tech - Data
Total questions: 86
Worksheet time: 43mins
What are some appropriate means of collecting data?
Autonomous devices, passive and active data collection, manual data collection, usage data
Only manual data collection
Only passive data collection
Only usage data
What should learners understand about storing data?
The relationship between binary data and storage units
Only how to calculate storage requirements
Only the use of cloud storage
Only the use of hosted storage
Which of the following is a general storage method mentioned in the document?
Digitally sampled sound
Only compressed video
Only bitmapped graphics
Only compressed audio
What is a key aspect of modern distribution networks?
Monitoring data usage and size
Only storing data
Only collecting data
Only analyzing data
Which advanced storage technique involves using multiple disks to improve performance and reliability?
Redundant Array of Inexpensive Disks (RAID)
Network Attached Storage (NAS)
Cloud storage
Hosted storage
Which of the following is a benefit of cloud computing?
Increased hardware costs
Limited data access
Virtualisation
Reduced flexibility
What is the role of Management Information Systems (MIS) in a business?
Increasing manual data entry
Supporting decision making
Reducing data storage
Limiting data access
Which of the following is NOT a service provided by cloud computing?
Data storage
Virtualised software
Manual filing systems
What is the purpose of descriptive data analytics?
To provide useful information
To increase data redundancy
To limit data access
To reduce data accuracy
What is the significance of the Turing test?
It measures the speed of a computer.
It evaluates the intelligence of a machine.
It tests the memory capacity of a system.
It assesses the efficiency of data processing.
Which of the following is a component of an expert system?
Database
Shell
Processor
Compiler
What is fuzzy logic used for in expert systems?
To increase processing speed
To handle uncertain or imprecise information
To store large amounts of data
To enhance graphical output
How do AI technologies potentially impact society?
By reducing the need for data storage
By using large data sets and raising social implications
By simplifying manual labor
By eliminating the need for human interaction
What is the role of a knowledge engineer in expert systems?
To design user interfaces
To manage databases
To develop and maintain the knowledge base
To optimize network performance
What is the main purpose of data collection?
To store data without any structure
To gather information in a measured and systematic manner
To create random events
To eliminate the need for analysis
Which of the following is an example of active data collection?
A smartphone tracking your location
A robot making decisions autonomously
Asking a person for their date of birth
Observing a football match
What is a key characteristic of passive data collection?
It requires explicit consent from individuals
It is conducted with pen and paper
It occurs without the person realizing their data is being gathered
It involves direct interaction with the subject
Why is manual data collection considered flawed?
It is too expensive
It is too complex to conduct
Mistakes can easily be made
It requires advanced technology
What is essential when choosing a method of data collection?
The method should be the most expensive
The method should be the fastest
The method should be appropriate for the type of data and context
The method should be the most popular
What does GDPR require organizations to ensure about data processing?
Data is processed randomly and without transparency
Data is processed lawfully, fairly, and in a transparent manner
Data is processed only for internal purposes
Data is processed without any security measures
What is the smallest unit of data in computing?
Byte
Nibble
Bit
Kilobyte
How many bytes are in a kilobyte (KB)?
1000 bytes
1024 bytes
2048 bytes
512 bytes
Which unit of data is made up of 1024 terabytes?
Gigabyte
Petabyte
Exabyte
Zettabyte
What is the largest unit of data mentioned in the text?
Exabyte
Zettabyte
Yottabyte
Terabyte
What is the binary representation of the character 'A' in ASCII?
1000001
1100001
1010001
1110001
How many bits are in a byte?
8 Bits
16 Bits
32 Bits
64 Bits
Which character set allows computers to store and process 137,000 different characters?
Unicode
ASCII
EBCDIC
ISO-8859-1
What is the process of converting sound waves into a digital signal called?
Sampling
Encoding
Modulating
Compressing
How many bytes are in a kilobyte (KB)?
1,024 Bytes
1,000 Bytes
512 Bytes
2,048 Bytes
What is the sample rate measured in?
Decibels
Hertz
Watts
Lumens
Which factor affects the sample quality of an audio file?
Bit depth
Sample rate and frequency
File format
Compression type
How is the file size of a sound file calculated?
Sample rate + sample resolution + length of sound
Sample rate × sample resolution × length of sound
Bit rate + length of sound
Bit rate × sample resolution × length of sound
What is a characteristic of vector graphics?
They use a grid of pixels
They can be scaled without loss of quality
They are always smaller in file size
They cannot be edited
What is a well-known type of raster graphic?
SVG
Bitmap
EPS
What is the maximum number of colors that can be represented with 8 bits per pixel?
256
128
1024
64
How do you calculate the storage requirement for an image?
Multiply rows, columns, and bits per pixel
Add rows, columns, and bits per pixel
Subtract rows from columns and multiply by bits per pixel
Divide rows by columns and add bits per pixel
What is the primary advantage of converting sound to a digital format?
It makes sound easier to manipulate, store, transmit, and retrieve
It increases the sound quality beyond human hearing
It reduces the file size to zero
It eliminates the need for any storage
Which technology has digital audio largely replaced?
Analogue technology
Satellite technology
Fiber optic technology
Quantum computing
What is a bitmap graphic made up of?
A grid of individual pixels
A series of vector paths
A collection of 3D models
A sequence of audio waves
Which file format is NOT typically associated with bitmap graphics?
GIF
PNG
SVG
BMP
What is the main trade-off in audio data compression?
Speed vs. color accuracy
Compression amount vs. audio quality
File size vs. pixel density
Storage space vs. transmission speed
Which of the following is a video compression algorithm?
H.264/AVC
JPEG
MP3
PNG
What is one advantage of using advanced storage techniques?
Increased pixelation in images
Reduced need for data compression
More efficient storage and transmission of data
Higher audio quality in recordings
What is the main advantage of using RAID 0?
Improved performance and additional storage
Fault tolerance and error correction
Data redundancy and protection
Increased write speed
Which RAID level mirrors data on multiple disks to provide fault tolerance?
RAID 0
RAID 1
RAID 3-6
RAID 5
How many disks are required at minimum for RAID 3-6?
One
Two
Three
Four
What is a disadvantage of RAID 3-6?
No fault tolerance
Decreased read speed
Loss of storage space
Increased write speed
Which RAID level provides no fault tolerance?
RAID 0
RAID 1
RAID 3-6
RAID 5
What is one of the main advantages of using multiple inexpensive disks in a RAID setup?
Increased complexity
Cost-effectiveness
Data corruption protection
High maintenance cost
What is a disadvantage of RAID systems mentioned in the text?
Easy setup for beginners
Foolproof data protection
Complexity in management
Low cost of failure
What does NAS stand for in the context of storage systems?
Network Array Storage
Network Attached Storage
Network Access System
Network Application Storage
What is a key advantage of Network Attached Storage (NAS)?
Decentralized storage
Limited access to files
Centralized storage
High initial cost
Which of the following is a disadvantage of NAS systems?
Network independence
Low initial setup cost
Network dependency
Unlimited scalability
What is the uptime percentage provided by high availability storage systems?
99.9%
99.99%
99.999%
99.9999%
How much downtime per year does a high availability storage system with five nines availability typically have?
Approximately 5 minutes
Approximately 5 and a half minutes
Approximately 6 minutes
Approximately 6 and a half minutes
What is one of the main advantages of high availability storage systems?
Low cost
Simplicity
Reliability
Limited redundancy
What is a disadvantage of implementing high availability storage solutions?
Increased downtime
High cost
Limited data access
Reduced complexity
What is a Storage Area Network (SAN)?
A dedicated, high-speed network for shared storage access
A single storage device connected to a local area network
A type of cloud storage service
A wireless network for mobile devices
How does a SAN differ from a NAS?
SAN is a local network with multiple devices; NAS is a single device
SAN is a single device; NAS is a local network with multiple devices
SAN is used for wireless connections; NAS is used for wired connections
SAN is slower than NAS
What is one advantage of using a SAN?
Low cost
High-speed data transfer rates
Easy to set up
Requires no cabling
What is one advantage of a centralized backup system?
It is less expensive to set up.
It requires less specialized knowledge.
It is easier to implement.
It provides better data security.
Which of the following is a disadvantage of Storage Area Networks (SANs)?
They are easy to expand.
They are inexpensive to maintain.
They require specialized knowledge.
They provide high data security.
What is the primary function of Content Delivery Networks (CDNs)?
To increase the cost of data storage.
To slow down webpage loading times.
To speed up the loading of webpages.
To reduce the need for data security.
How do Content Delivery Networks (CDNs) ensure faster content delivery to users?
By storing content on a server far from the user.
By using a single server for all users.
By caching content on a geographically closer server.
By reducing the amount of data stored.
What is one advantage of using a Content Delivery Network (CDN)?
Increased cost
Reduced latency
Increased complexity
Decreased security
Which of the following is a disadvantage of using a CDN?
Improved performance
Scalability
Cost
Security
How does cloud storage benefit organizations in terms of scalability?
Requires purchasing physical servers
Allows quick expansion of storage space
Limits data access to local servers
Increases the need for physical infrastructure
What is a key responsibility of a cloud storage provider?
Managing physical server purchases
Ensuring data is stored on local servers
Securely managing and maintaining storage infrastructure
Limiting network connections
What is a key advantage of cloud storage?
Requires a reliable internet connection
Easily scale storage capacity up or down as needed
Data security and privacy can be a concern
Ongoing subscription fees can add up over time
Which of the following is a disadvantage of hosted storage?
Managed by a third-party provider
Easily expand storage capacity as needed
Reliance on the service provider for uptime and performance
Can be more cost-effective than on-premises solutions
Why might organisations use more than one data storage method?
To reduce costs associated with data storage
To handle diverse types of data effectively
To ensure data security and compliance
To avoid reliance on a single provider
What is a common feature of hosted storage services?
Located within a recipient's physical location
Provide users with direct online access
Require in-house expertise for management
Do not involve any ongoing costs
Which of the following is a benefit of using a hosted instance in cloud computing?
It requires physical hardware to operate.
It allows remote access and management.
It cannot be scaled up or down.
It is only compatible with Linux operating systems.
What is the primary purpose of virtualisation in computing?
To increase the physical size of hardware.
To create software-based versions of hardware.
To eliminate the need for operating systems.
To reduce the number of virtual machines.
How does virtualisation help in improving application performance?
By reducing the need for virtual memory.
By eliminating the use of virtual desktops.
By ensuring high levels of virtual memory on the host computer.
By requiring more physical hardware.
What is a characteristic of virtual desktops in virtualisation?
They are always deployed on-site.
They require users to manage them locally.
They are hosted by a third party.
They cannot be used for databases.
What is the primary purpose of clustering in computing?
To increase the number of computers in a network
To improve the performance of a task by distributing workload
To reduce the cost of hardware
To enhance the security of a network
Which of the following is a characteristic of blockchain storage?
Centralized data management
Immutable ledgers
High-speed data processing
Low security
How does cloud computing differ from cloud storage?
Cloud computing is used for data backup
Cloud storage provides software applications
Cloud computing delivers computing services over the Internet
Cloud storage is primarily for processing power
What is a benefit of using blockchain for data storage?
Faster data retrieval
Improved privacy and security through encryption
Lower cost than traditional storage
Unlimited storage capacity
What is an example of a cloud computing service?
Local software installation
Cloud e-mail
Hard disk storage
Physical server management
What is one of the benefits of using cloud computing services?
Limited access to services
Increased hardware costs
24/7 access to services
Reduced data storage
Which of the following is an example of cloud mail providers?
Yahoo and Bing
Gmail and Outlook
Facebook and Twitter
Amazon and eBay
What does operating system virtualisation allow?
Running multiple physical servers
Emulating the operating system
Increasing hardware requirements
Reducing software capabilities
How does cloud computing help in cost savings compared to in-house servers?
By increasing hardware costs
By requiring more physical space
By reducing the need for physical servers
By increasing maintenance costs
What is the role of service virtualisation in cloud computing?
It increases the cost of development
It allows testing much earlier in the development process
It reduces the need for software updates
It limits the use of virtual servers
