- What
is an access method in file management?
A. The method used to allocate memory to files
B. The technique for organizing and retrieving data from files
C. The method used for directory implementation
D. The process of mounting and sharing files in a file system
Answer: B. The technique for organizing and retrieving data from files
Explanation: Access methods define how data is organized and retrieved from a file, such as sequential or direct access methods. - How
does file system mounting contribute to file management?
A. It controls access to hardware resources
B. It organizes and stores data on storage devices
C. It provides a way to access files in a directory
D. It makes file systems available for use by associating them with a directory
Answer: D. It makes file systems available for use by associating them with a directory
Explanation: Mounting allows a file system to be made accessible to users by associating it with a specific directory in the operating system's directory structure. - What
is the purpose of file protection in file management?
A. Allocating memory to processes
B. Managing input/output operations
C. Controlling access to hardware resources
D. Ensuring authorized access and preventing unauthorized access to files
Answer: D. Ensuring authorized access and preventing unauthorized access to files
Explanation: File protection ensures that only authorized users and processes can access or modify files, safeguarding the data from unauthorized use. - What
are the primary allocation methods used in file management?
A. Contiguous and non-contiguous
B. Dedicated and shared
C. Serial access and direct access
D. Mounting and sharing
Answer: A. Contiguous and non-contiguous
Explanation: Files can be allocated in contiguous blocks (all stored together) or non-contiguous blocks (fragmented across different locations). - What
is the purpose of free-space management in file systems?
A. Allocating memory to processes
B. Managing input/output operations
C. Organizing and storing data on storage devices
D. Keeping track of available space on storage devices for file allocation
Answer: D. Keeping track of available space on storage devices for file allocation
Explanation: Free-space management tracks which parts of the storage device are available to be allocated to new files or data. - What
is the difference between dedicated and shared devices in device
management?
A. Dedicated devices are exclusively assigned to a single process, while shared devices are used by multiple processes.
B. Dedicated devices are used for direct access, while shared devices are used for serial access.
C. Dedicated devices allow virtual access, while shared devices do not.
D. Dedicated devices are more reliable than shared devices.
Answer: A. Dedicated devices are exclusively assigned to a single process, while shared devices are used by multiple processes.
Explanation: Dedicated devices are assigned to one process at a time, while shared devices are used by multiple processes simultaneously. - How
are direct access devices different from serial access devices?
A. Direct access devices allow access to data in a sequential manner, while serial access devices provide random access.
B. Direct access devices allow multiple processes to access data simultaneously, while serial access devices allow only one process at a time.
C. Direct access devices are used for printing, while serial access devices are used for reading and writing data.
D. Direct access devices have a single access point, while serial access devices have multiple access points.
Answer: B. Direct access devices allow multiple processes to access data simultaneously, while serial access devices allow only one process at a time.
Explanation: Direct access devices, like hard drives, allow random access to data, while serial access devices, like tape drives, require sequential access. - What
is the purpose of disk scheduling methods in device management?
A. Allocating memory to processes
B. Managing input/output operations
C. Controlling access to hardware resources
D. Optimizing the order in which requests are serviced to improve disk efficiency
Answer: D. Optimizing the order in which requests are serviced to improve disk efficiency
Explanation: Disk scheduling algorithms determine the order in which disk I/O requests are processed, optimizing performance and reducing seek time. - What
is the role of channels and control units in direct access storage
devices?
A. Allocating memory to processes
B. Managing input/output operations
C. Controlling access to hardware resources
D. Facilitating communication between the CPU and storage devices
Answer: D. Facilitating communication between the CPU and storage devices
Explanation: Channels and control units manage communication between the CPU and storage devices, ensuring that data is transferred efficiently. - What
is the primary goal of interprocess communication (IPC) in operating
systems?
A. Allocating memory to processes
B. Managing input/output operations
C. Enabling communication and data exchange between processes
D. Controlling access to hardware resources
Answer: C. Enabling communication and data exchange between processes
Explanation: IPC allows processes to communicate and exchange data, facilitating cooperation between them in a multi-processing environment. - How
do pipes contribute to interprocess communication?
A. They allocate memory to processes
B. They enable communication between processes through a unidirectional channel
C. They control access to hardware resources
D. They manage input/output operations
Answer: B. They enable communication between processes through a unidirectional channel
Explanation: Pipes allow data to flow from one process to another, providing a simple and effective method for interprocess communication. - What
functions do popen and pclose perform in interprocess communication using
pipes?
A. Opening and closing files
B. Spawning new processes and terminating them
C. Creating and deleting directories
D. Reading and writing data between processes
Answer: B. Spawning new processes and terminating them
Explanation: popen() opens a pipe and starts a new process, while pclose() terminates the process and closes the pipe. - What
is the purpose of co-processes in interprocess communication?
A. Managing input/output operations
B. Enabling parallel processing
C. Facilitating communication and collaboration between processes
D. Allocating memory to processes
Answer: C. Facilitating communication and collaboration between processes
Explanation: Co-processes allow multiple processes to collaborate on a task, sharing resources and information for parallel processing. - How
does shared memory contribute to interprocess communication?
A. It enables processes to share the same memory space
B. It provides a secure channel for communication between processes
C. It manages input/output operations efficiently
D. It controls access to hardware resources
Answer: A. It enables processes to share the same memory space
Explanation: Shared memory allows processes to access the same region of memory, facilitating efficient communication and data exchange. - What
is a FIFO in interprocess communication?
A. First In, First Out data structure
B. File Input/Output
C. First In, Last Out data structure
D. Flexible Input/Output
Answer: A. First In, First Out data structure
Explanation: FIFO is a queue data structure where the first element inserted is the first to be removed, often used for communication between processes. - How
do message queues facilitate interprocess communication?
A. By enabling processes to share the same memory space
B. By providing a mechanism for processes to exchange messages
C. By controlling access to hardware resources
D. By managing input/output operations efficiently
Answer: B. By providing a mechanism for processes to exchange messages
Explanation: Message queues allow processes to communicate by sending and receiving messages, which are stored in a queue for later retrieval. - What
is the significance of passing file descriptors in interprocess
communication?
A. It enables processes to share the same memory space
B. It allows processes to communicate without using files
C. It provides a secure channel for communication between processes
D. It allows processes to share information about open files
Answer: D. It allows processes to share information about open files
Explanation: Passing file descriptors allows processes to share information about files they are currently accessing, enabling efficient communication. - What
is the purpose of semaphores in interprocess communication?
A. Allocating memory to processes
B. Managing input/output operations
C. Controlling access to hardware resources
D. Synchronizing and coordinating the execution of processes
Answer: D. Synchronizing and coordinating the execution of processes
Explanation: Semaphores are used to synchronize processes, ensuring that only one process can access a critical section at a time. - What
is the role of demand paging in interprocess communication?
A. Allocating memory to processes
B. Enabling communication and data exchange between processes
C. Dynamically adjusting the size of the logical address space
D. Controlling access to hardware resources
Answer: B. Enabling communication and data exchange between processes
Explanation: Demand paging helps load the required pages into memory when needed, making it easier to manage memory and enable communication between processes. - What is the fundamental purpose of file management in an operating system?
A. A. Allocating memory to processes
B. Managing input/output operations
C. Controlling access to hardware resources
D. Organizing and storing data on storage devices
Answer: D. Organizing and storing data on storage devices
Explanation: The main function of file management is to ensure that
data is properly stored, retrieved, and organized on storage devices.