WorksheetsAICE Comp Sci Units 1-3
Total questions: 92
Worksheet time: 46mins
How many bytes are in a kilobyte?
1024 bytes
1000 bytes
2048 bytes
512 bytes
What is the size of a gibibyte in mebibytes?
1000 mebibytes
1024 mebibytes
2048 mebibytes
512 mebibytes
Which of the following is an application of Binary Coded Decimals in electronic displays?
Ensures accurate representation of decimal values
Avoids accumulation of errors in financial transactions
Simplifies visual display of individual digits
Facilitates easier conversion with denary
What is the decimal equivalent of the binary number 11101001?
225
233
245
239
What is the decimal equivalent of the binary number 000111010110?
470
256
512
128
Convert the decimal number 168 to binary.
10101000
11011000
10011000
11101000
What is the denary equivalent of the hexadecimal number 3B?
59
48
62
71
Convert the hexadecimal number 18E to its denary equivalent.
398
256
314
372
What is the hexadecimal equivalent of the denary number 232?
E8
1A4
D2
F0
What is the method called that represents signed binary numbers by inverting each bit of the positive number?
Two's Complement
Standard Binary Form
Decimal Representation
One's Complement
In Two's Complement, how is a negative number formed?
By adding 2 to the least significant bit
By inverting each bit and adding 1 to the least significant bit
By converting to decimal and subtracting
By inverting each bit only
Which method makes arithmetic operations easier for signed binary numbers?
Decimal System
One's Complement
Two's Complement
Hexadecimal System
What is the 12-bit two's complement binary representation of -196?
111100111100
000011001100
111111111111
000000111100
When adding the binary numbers 00111101 and 00101101, what is the result?
01101010
01010101
11111111
00000000
What is the result of adding the contents of Register 1 and Register 2?
01101010
11111111
00000000
01010101
What is an overflow in binary arithmetic?
When the result of an addition operation exceeds the range that can be represented with the given number of bits
When two binary numbers are added without a carry
When a binary number is shifted to the left
When a binary number is converted to decimal
What is a logical shift in binary operations?
Moving all numbers a certain amount of digits to the right or left
Adding two binary numbers
Converting binary to hexadecimal
Multiplying binary numbers
How many characters does ASCII consist of?
128 characters
256 characters
64 characters
512 characters
What is the main limitation of ASCII?
Limited to Latin alphabet
Cannot represent numbers
Does not support punctuation marks
Limited to 256 characters
What does Unicode support?
Over 150 different scripts, including Latin, Greek, Cyrillic, Chinese
Only Latin and Greek scripts
Only numeric characters
Only control characters
What is the maximum number of bits per character that Unicode can use?
7 bits
8 bits
16 bits
32 bits
Which character set can represent a wider range of characters?
ASCII
Unicode
Binary
Hexadecimal
What is the primary language support for ASCII?
French
Spanish
English
Chinese
What is the smallest unit of a bitmapped image?
Byte
Pixel
Vector
Grid
Which of the following is a common image format for bitmap images?
SVG
JPEG
HTML
CSS
What does image resolution refer to?
The number of colors in an image
The number of pixels in an image
The size of the image file
The brightness of the image
How does higher image resolution affect bitmap image quality?
It results in a blocky image
It results in finer detail and clearer images
It reduces the number of colors
It makes the image darker
What is the effect of higher color/bit depth on file size?
Decreases file size
Increases file size
Has no effect on file size
Reduces image quality
What are vector graphics created using?
Mathematical formulas
Individual pixels
Photographic techniques
Chemical processes
Which of the following is a popular file format for vector graphics?
JPEG
SVG
BMP
GIF
What is a basic element of a vector graphic called?
Pixel
Drawing Object
Texture
Filter
How do vector graphics differ from bitmap images in terms of scalability?
Vector graphics have poor scalability
Bitmap images can be resized without losing quality
Vector graphics can be resized without losing quality
Bitmap images are resolution-independent
What does higher bit depth in quantization provide?
Less accurate sound representation
More accurate sound representation
Faster sound processing
Lower sound quality
What is the process of converting a continuous analog sound wave into discrete digital values by measuring the amplitude of the sound wave at regular intervals called?
Encoding
Sampling
Playback
Compression
Which of the following is a common digital audio format that is uncompressed?
MP3
FLAC
WAV
AAC
What is the term for the number of samples taken per second during the sampling process, measured in Hertz (Hz)?
Sampling Resolution
Bit Depth
Sampling Rate
Encoding Rate
If an audio message is recorded with a sampling rate of 50 kHz and a sampling resolution of 16 bits, how many samples are taken per second?
16,000 samples
32,000 samples
50,000 samples
64,000 samples
What is the main characteristic of analog signals?
They are discrete numerical representations.
They vary continuously over time.
They are stored as binary numbers.
They are irreversible.
What is a key feature of digital data?
It is smooth and continuous.
It is represented by variations in air pressure.
It is obtained through sampling and quantization.
It cannot be processed by digital systems.
How does file size affect data accuracy?
Larger file sizes decrease accuracy.
Smaller file sizes increase accuracy.
Higher sampling rates enhance accuracy.
Lower resolutions provide finer granularity.
What is a characteristic of lossy compression?
It is reversible.
It removes data.
It results in a larger file size.
It is used when no data can be lost.
Which type of compression is used for efficient storage without quality loss?
Lossy compression
Run-Length Encoding
Lossless compression
Analog compression
What is Run-Length Encoding (RLE) effective for?
Compressing data with many unique elements
Compressing data with many repeated elements
Increasing file size
Reducing sampling rates
What is the purpose of data sharing in a computer network?
To enable sharing of hardware resources
To allow sharing of files, applications, and data
To facilitate email, messaging, and video conferencing
To support collaborative work through shared applications
Which of the following is a component of computer networks?
Data Sharing
Communication
Nodes
Collaboration
What is the role of routers in a network?
To connect multiple devices within the same network
To direct data packets between different networks
To allow sharing of files, applications, and data
To support collaborative work through shared applications
Which device connects multiple devices within the same network using MAC addresses?
Routers
Nodes
Switches
Transmission Media
What is the primary purpose of Local Area Networks (LANs)?
To connect multiple cities and countries
To facilitate long-distance communication
To share resources among multiple users within a small geographic area
To provide satellite communication services
Which of the following is a characteristic of hubs used in networks?
They are more complex than switches
They send data to all connected devices at once
They are used for long-distance communication
They are primarily used for satellite connections
What type of network spans a large geographic area and connects multiple smaller networks?
Local Area Network (LAN)
Personal Area Network (PAN)
Wide Area Network (WAN)
Metropolitan Area Network (MAN)
Which technology is often used in Wide Area Networks (WANs) to maintain connectivity across dispersed sites?
Ethernet cables
Hubs
Satellite communications
Bluetooth
What is the primary geographic scope of a Local Area Network (LAN)?
Spans large geographic areas, such as cities, countries, or continents
Limited to a small area like a building or campus
Covers an entire country
Extends across multiple continents
Which devices are typically used in a Local Area Network (LAN)?
Routers, modems, satellite links
Switches, hubs, routers
Fiber optics, leased lines
Cellular networks, satellite links
What type of transmission media is commonly used in a Wide Area Network (WAN)?
Ethernet cables and Wi-Fi
Fiber optics and Ethernet cables
Leased lines, fiber optics, satellite links, and cellular networks
Only Wi-Fi
What is the main focus of data transfer in a Local Area Network (LAN)?
Long-distance communication
Internal communication and resource sharing
Global communication
Satellite communication
In a client-server model, what role do client devices typically play?
Host, manage, and provide resources
Request and receive services or resources
Only store data
Act as powerful machines
Which of the following is a common use case for the client-server model?
Hosting websites and web applications
Only storing local files
Managing local databases
Running offline applications
What is a major advantage of centralized management in a network?
It allows for decentralized control.
It ensures data consistency as all clients access the same data from the server.
It eliminates the need for a central server.
It increases the risk of server overload.
What is a significant disadvantage of a centralized server system?
It provides easy management and monitoring.
It allows for direct peer-to-peer communication.
It has a single point of failure, risking loss of access if the server fails.
It supports blockchain transactions.
In a peer-to-peer (P2P) network, what role do peers play?
Peers act as a central server for all devices.
Peers share resources directly with each other without a central server.
Peers only receive data from a central server.
Peers do not communicate directly over the network.
Which of the following is a common use case for peer-to-peer networks?
Centralized data management
File sharing and communication services
Server-based applications
Single point of failure systems
How do peers communicate in a P2P network?
Through a central server
Directly over the network
By relying on a single point of failure
By using a centralized management system
What is a key advantage of decentralization in a network?
Easier management of security policies
Reduced risk of a single point of failure
Increased dependency on central servers
Higher maintenance costs
Which of the following is a disadvantage of a decentralized network?
Scalability
Cost efficiency
Data consistency
Privacy
What is a characteristic of a thin client?
High local storage capacity
Processes tasks locally
Relies on a central server for processing
Operates independently of network connectivity
Which feature is associated with a thick client?
Minimal local storage
Highly dependent on network connectivity
Easier and cheaper maintenance
High processing power
What does network topology refer to?
The speed of data transmission
The arrangement of various elements in a network
The type of data being transmitted
The security protocols used
Why is network topology important?
It determines the color of network cables.
It affects network efficiency, scalability, fault tolerance, and cost.
It only affects the physical size of the network.
It is only important for wireless networks.
What is a key characteristic of a bus topology?
All devices connect to a central hub.
Data is broadcast to all devices on a single central cable.
It is the most expensive topology.
It has the highest fault tolerance.
Which of the following is a benefit of star topology?
High collision risk
Complex installation
Easy troubleshooting and maintenance
High cost
What is a disadvantage of bus topology?
High cost of installation
Vulnerability if the central cable fails
Complex network management
High collision risk in star topology
In star topology, what role does the central hub or switch play?
It connects directly to the internet.
It manages data transmission and reduces data collisions.
It only provides power to devices.
It is used only for wireless connections.
What is a key benefit of mesh topology in network design?
Low cost and simplicity
High reliability and redundancy
Limited scalability
Single path data transmission
Which of the following is a characteristic of hybrid technologies in networking?
Use of a single network topology
Limited flexibility and scalability
Combination of multiple topologies
Exclusive use of star topology
What advantage does cloud computing offer in terms of cost?
High upfront capital investment
Pay only for the resources you use
Fixed resource allocation
Expensive hardware requirements
How does cloud computing enhance accessibility?
Requires physical presence
Access data only from local servers
Access data and applications from anywhere with an internet connection
Limited to office networks
What is a key advantage of scalability in cloud computing?
It requires significant upfront capital investment.
It allows resources to be scaled up or down based on demand.
It limits access to applications from remote locations.
It increases the need for physical hardware.
Which of the following is a characteristic of public clouds?
Exclusive access for a single organization.
Managed by the organization itself.
Services are accessible to the general public.
Higher levels of security and compliance.
What is a disadvantage of wired networks?
Faster connection, higher bandwidth.
Requires physical cables.
More reliable, stable connection.
Less susceptible to interference.
What benefit does accessibility provide in cloud computing?
Reduces the need for disaster recovery options.
Allows access to data and applications from anywhere with an internet connection.
Increases the need for physical hardware.
Limits the ability to scale resources.
Which feature is associated with private clouds?
Services are accessible to the general public.
Users pay only for what they use.
Enhanced control and privacy over data and applications.
Managed by third-party providers.
What is one advantage of wireless networks?
Slower speeds compared to wired
Mobility and convenience
Higher latency
Susceptible to interference
Which of the following is a disadvantage of copper cables?
Cost-effective
Easy to install and manage
Limited bandwidth compared to fiber
More secure
What is a characteristic of fiber optic cables?
Transmits data as light signals
Heavier and bulkier than fiber
Shorter lifespan due to oxidation
Reduced signal intensity over distance
Which of the following is a disadvantage of wireless networks?
Easy installation
Scalable
Security risks
Cost-effective for large areas
What is an advantage of using copper cables?
Limited range
More reliable, stable connection
Higher latency
Less stable connections
What is a characteristic of embedded systems?
Requires high processing power
Contains firmware that is easily updated
Built into a larger system
Has its own operating system
What does "Dedicated Function" mean in the context of embedded systems?
Designed for one specific task
Requires high processing power
Contains firmware that is easily updated
Includes a processor, memory, and I/O capability
Which component is NOT included in the core components of embedded systems?
Processor
Memory
I/O capability
Operating system
What is one of the pros of using specialized hardware for specific tasks?
Limited Resources
Cost-Effectiveness
Scalability Issues
Debugging Challenges
Which of the following is a con of using embedded systems?
Efficiency
Low Power Consumption
Difficulty in Updates
Size and Portability
How do 3D printers create objects?
By removing material layer by layer
By adding material layer by layer
By compressing material into shape
By melting material into molds
