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Questions and Answers
Which type of processes in UNIX interact directly with the user through the terminal?
Which type of processes in UNIX interact directly with the user through the terminal?
What type of processes in UNIX run independently of the terminal and do not require direct user interaction?
What type of processes in UNIX run independently of the terminal and do not require direct user interaction?
Which type of processes in UNIX are initiated and managed by the operating system to perform system-level tasks?
Which type of processes in UNIX are initiated and managed by the operating system to perform system-level tasks?
Foreground processes in UNIX often hold control of the terminal until they __________.
Foreground processes in UNIX often hold control of the terminal until they __________.
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Background processes in UNIX are commonly used for __________.
Background processes in UNIX are commonly used for __________.
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What distinguishes system processes from other types of processes in UNIX?
What distinguishes system processes from other types of processes in UNIX?
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What type of processes run continuously and perform specific system tasks in UNIX?
What type of processes run continuously and perform specific system tasks in UNIX?
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Which type of process may continue to run even after the parent process has been terminated in UNIX?
Which type of process may continue to run even after the parent process has been terminated in UNIX?
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What type of process is created when a child process finishes its execution but the parent process has yet to read its exit status in UNIX?
What type of process is created when a child process finishes its execution but the parent process has yet to read its exit status in UNIX?
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Which processes form hierarchical structures for task delegation and resource management in UNIX?
Which processes form hierarchical structures for task delegation and resource management in UNIX?
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What kind of processes in UNIX are initiated and managed by users to perform specific tasks or run applications?
What kind of processes in UNIX are initiated and managed by users to perform specific tasks or run applications?
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Which type of processes do not require user interaction and often provide essential system services in UNIX?
Which type of processes do not require user interaction and often provide essential system services in UNIX?
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Study Notes
Types of Processes in UNIX
- Foreground processes are interactive, run in the foreground, and interact directly with the user through the terminal.
- Foreground processes require user input and may hold control of the terminal until they complete their execution.
- Examples of foreground processes include text editors, command-line utilities, and interactive programs.
Background Processes
- Background processes are non-interactive, run in the background, and do not require direct user interaction.
- Background processes execute independently of the terminal and do not block user input or output.
- Examples of background processes include batch jobs, automated scripts, and system maintenance tasks.
System Processes
- System processes are essential processes that are initiated and managed by the operating system to perform system-level tasks.
- System processes run in the background and handle critical system functions, such as memory management, process scheduling, I/O operations, and system initialization.
- Examples of system processes include kernel processes, daemons, and system services.
User Processes
- User processes are processes initiated and managed by users to perform specific tasks or run applications.
- User processes can be interactive or non-interactive and may run in the foreground or background.
- User processes are created in response to user actions, such as executing commands, launching applications, or running scripts.
Daemon Processes
- Daemon processes are background processes that run continuously and perform specific system tasks or services.
- Daemon processes typically run with elevated privileges and do not require user interaction.
- Daemons often provide essential system services, such as network services (e.g., web server, DNS server), logging, printing, and scheduling tasks.
Parent and Child Processes
- Parent processes are processes that initiate the creation of other processes, known as child processes.
- Child processes inherit attributes from their parent processes and may perform tasks independently or in coordination with the parent.
- Parent-child relationships form hierarchical process structures, allowing for the delegation of tasks and resource management.
Zombie and Orphan Processes
- A zombie process is a Linux process that has finished its execution but still has an entry in the process table.
- Zombie processes usually get created when a child process completes its execution but the parent process has yet to read its exit status.
- An orphan process is a process that continues to run even after the parent process has been completed or terminated.
- An orphan process can be intentionally or unintentionally created.
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Description
Test your knowledge on the various types of processes in UNIX by taking this quiz designed for the Introduction to UNIX course (CS262). Learn about foreground processes and other common types of processes found in UNIX operating systems.
