Podcast
Questions and Answers
What is an interrupt? Choose the most appropriate answer.
What is an interrupt? Choose the most appropriate answer.
What is the role of the interrupt register (IR)?
What is the role of the interrupt register (IR)?
Which of the following statements about polling is TRUE?
Which of the following statements about polling is TRUE?
Which of these correctly describes the role of a buffer in a computer system?
Which of these correctly describes the role of a buffer in a computer system?
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Which of these statements about handshaking is TRUE?
Which of these statements about handshaking is TRUE?
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What is the basic unit of information in computer systems?
What is the basic unit of information in computer systems?
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How many bits make up a byte?
How many bits make up a byte?
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What is the purpose of an interrupt?
What is the purpose of an interrupt?
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What is the relationship between a byte and a character?
What is the relationship between a byte and a character?
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Which of these is NOT a common use for bytes?
Which of these is NOT a common use for bytes?
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What are control systems primarily designed to do?
What are control systems primarily designed to do?
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Which statement best describes the functionality of sensors in a control system?
Which statement best describes the functionality of sensors in a control system?
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What is a characteristic feature of automatic doors as part of a control system?
What is a characteristic feature of automatic doors as part of a control system?
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Which operating system is based on the Linux kernel and designed for embedded systems?
Which operating system is based on the Linux kernel and designed for embedded systems?
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What type of operating system is eCos designed to support?
What type of operating system is eCos designed to support?
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What is the primary goal of multiprogramming?
What is the primary goal of multiprogramming?
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How does multitasking differ from multiprogramming?
How does multitasking differ from multiprogramming?
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Which term describes the ability for a program to execute different parts simultaneously?
Which term describes the ability for a program to execute different parts simultaneously?
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What is the relationship between paging and virtual memory?
What is the relationship between paging and virtual memory?
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What does the term 'swapping' refer to in operating systems?
What does the term 'swapping' refer to in operating systems?
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Which statement correctly describes multiprocessing?
Which statement correctly describes multiprocessing?
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What problem can excessive page swapping cause in an operating system?
What problem can excessive page swapping cause in an operating system?
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What is the characteristic feature of TinyOS?
What is the characteristic feature of TinyOS?
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What is the primary purpose of virtual machines?
What is the primary purpose of virtual machines?
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Which feature does NOT impact the speed of processors?
Which feature does NOT impact the speed of processors?
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What is a key requirement for effective Voice over IP (VoIP) performance?
What is a key requirement for effective Voice over IP (VoIP) performance?
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Which type of RAM continuously leaks data and needs periodic refreshing?
Which type of RAM continuously leaks data and needs periodic refreshing?
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What is the function of the operating system regarding memory management in multitasking?
What is the function of the operating system regarding memory management in multitasking?
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What is a disadvantage of using normal routers for VoIP?
What is a disadvantage of using normal routers for VoIP?
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What does ROM typically store?
What does ROM typically store?
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What occurs during paging in operating systems?
What occurs during paging in operating systems?
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Which factor is NOT a system resource managed by an operating system?
Which factor is NOT a system resource managed by an operating system?
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What defines batch processing in computing?
What defines batch processing in computing?
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What is a major benefit of virtual machines in software testing?
What is a major benefit of virtual machines in software testing?
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What characteristic of SRAM makes it suitable for placement between the processor and DRAM?
What characteristic of SRAM makes it suitable for placement between the processor and DRAM?
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Why is high bandwidth crucial for VoIP performance?
Why is high bandwidth crucial for VoIP performance?
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Which feature most significantly impacts the multitasking capabilities of an operating system?
Which feature most significantly impacts the multitasking capabilities of an operating system?
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Flashcards
Interrupt Handling
Interrupt Handling
The process by which the CPU responds to an interrupt signal from a client or device.
Interrupt Register (IR)
Interrupt Register (IR)
A memory location used to detect the specific interrupt-handling code.
Polling
Polling
A technique where one unit checks the status of another at regular intervals.
Handshaking
Handshaking
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Buffer
Buffer
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Tizen
Tizen
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eCos
eCos
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Control System
Control System
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Sensors in Control Systems
Sensors in Control Systems
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Automatic Doors Example
Automatic Doors Example
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Bit
Bit
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Byte
Byte
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Binary
Binary
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Decimal
Decimal
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Interrupt
Interrupt
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Batch Processing
Batch Processing
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Multiprogramming
Multiprogramming
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Multitasking
Multitasking
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Multiprocessing
Multiprocessing
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Multithreading
Multithreading
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Swapping
Swapping
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Paging
Paging
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Thrashing
Thrashing
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Virtual Memory
Virtual Memory
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Processor Speed Factors
Processor Speed Factors
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Virtual Machines
Virtual Machines
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VoIP Requirements
VoIP Requirements
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Bandwidth Impact
Bandwidth Impact
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OS Functions in Multitasking
OS Functions in Multitasking
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Primary Memory
Primary Memory
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RAM
RAM
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Static RAM (SRAM)
Static RAM (SRAM)
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Dynamic RAM (DRAM)
Dynamic RAM (DRAM)
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Read Only Memory (ROM)
Read Only Memory (ROM)
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Secondary Storage
Secondary Storage
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Processor Management
Processor Management
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Memory Isolation
Memory Isolation
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Study Notes
Computer Organization - Binary Representation
- All data and instructions in computer systems are stored as binary digits (bits), which have values of 1 or 0.
- Eight bits form a byte.
- Bytes are used to represent characters, file sizes (e.g., 12MB), and connection speeds (e.g., 50Mbps).
Interrupt
- Allows a higher-priority task to interrupt a current CPU job temporarily.
- Can be triggered by hardware or software.
- Used to signal that a client needs access to a server in a multi-access system.
- Used to signal a peripheral needing service (e.g., printer).
- Used to signal software errors or problems (e.g., low battery).
- CPU handles interrupts by suspending current tasks, activating an interrupt handler, and servicing the interrupt request.
- An interrupt register (IR) stores the location of the interrupt-handling code in memory.
Polling
- A technique that allows a unit to check the status of another unit at regular intervals.
- Efficient use of CPU time when CPU is not busy.
Handshaking
- The exchange of signals/messages between devices to confirm readiness for data exchange.
- Devices use signals to establish parameters, protocols, and certificates for data transmission.
Buffer
- Temporarily holds data to compensate for speed differences between devices.
- Peripherals are often slower than the CPU.
- The buffer allows the CPU to complete other tasks while the peripheral processes the data.
Paging
- A memory management technique used in virtual memory.
- Divides memory into pages which can be swapped between RAM and secondary storage.
- Improves the effective amount of RAM by allowing programs larger than RAM to be run.
Virtual Machines
- Emulate other operating systems, hiding the host machine's environment.
- Allow software to be executed on different platforms (portability).
- More practical and cost-effective than testing software on multiple physical machines.
Voice over IP (VoIP)
- Audio (and potentially video) transmitted over the internet.
- Requires broadband internet connection.
- Can be integrated with office computers, collaborative devices (webcams, desk endpoints), and phones.
- Resources include bandwidth (and quality considerations).
- Routers must be capable of handling VoIP traffic for optimal performance.
Memory Management
- Operating systems (OS) allow multiple programs to share memory by assigning separate memory areas to each.
- OS manages memory isolation for each program to avoid conflicts.
- Paging can occur if shared memory storage gets full.
- CPU management prioritizes tasks for efficient use.
Primary Memory (RAM)
- Stores data and instructions active in a computer.
- Directly connected and communicates with the processor.
- Includes RAM (static and dynamic), and cache.
- Enables the fetch, decode, and execute CPU cycle.
Secondary Storage
- Provides affordable, mass-storage permanence for data that doesn't need constant access.
- Types include direct and sequential access.
Batch Processing
- Executing multiple programs together as a group.
- Programs wait in sequence to be executed.
- No user interaction during processing.
- Can be inefficient and not suited for all applications.
Multiprogramming
- Running multiple programs concurrently, but only executing one at a time.
- Minimizes CPU idle time, improves system utilization.
Multitasking
- Similar to multiprogramming, but tasks are smaller and completed quickly.
- Uses CPU time-sharing.
Multiprocessing
- Using multiple CPUs to execute tasks simultaneously.
- Improves processing speed and performance on complex tasks.
Multithreading
- Allows a program to execute several parts concurrently (called threads).
- Avoids thread interference.
Swapping
- Technique of temporarily moving code from RAM to secondary storage.
- Allows more programs/processes to be in RAM than the physical memory allows.
- Can result in less efficient operations.
Paging
- Mechanism that implements virtual memory.
- Allows modern OS to use secondary storage as if it were additional RAM.
- Excessive paging (swapping) causes inefficiencies and performance issues.
Control Systems
- Device systems that operate automatically.
- Includes sensors for feedback information and actuators for control.
- Examples include door openers, and other automated systems.
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Description
This quiz covers fundamental concepts in computer organization, including binary representation, interrupts, and polling techniques. Test your understanding of how data is stored in binary, how CPU prioritizes tasks through interrupts, and how polling is used for efficient resource management.