Question:
The Process Control Block (PCB) contains which of the following information?
The Process Control Block (PCB) contains which of the following information?
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Think of the PCB as a process's passport. It contains all the vital information that the operating system needs to manage and track that process throughout its life cycle.
Updated On: Jul 2, 2026
- Process ID and process state
- Memory addresses of all system files
- Network configuration settings
- CPU scheduling algorithms
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The Correct Option is A
Solution and Explanation
The Process Control Block (PCB) is a data structure in the operating system kernel that contains all the essential information about a specific process. The OS maintains a PCB for every process.
Key information stored in a PCB includes:
Process State: The current state of the process (e.g., new, ready, running, waiting, terminated). Process ID (PID): A unique identifier for the process. Program Counter: The address of the next instruction to be executed for this process. CPU Registers: The values of the processor's registers (used to restore the process's state after an interrupt). CPU Scheduling Information: Process priority, pointers to scheduling queues, etc. Memory-Management Information: Information such as page tables or segment tables. I/O Status Information: A list of I/O devices allocated to the process, open files, etc.
From the options, Process ID and process state are fundamental pieces of information contained within the PCB. The other options are either not stored in the PCB or are too general.
Key information stored in a PCB includes:
Process State: The current state of the process (e.g., new, ready, running, waiting, terminated). Process ID (PID): A unique identifier for the process. Program Counter: The address of the next instruction to be executed for this process. CPU Registers: The values of the processor's registers (used to restore the process's state after an interrupt). CPU Scheduling Information: Process priority, pointers to scheduling queues, etc. Memory-Management Information: Information such as page tables or segment tables. I/O Status Information: A list of I/O devices allocated to the process, open files, etc.
From the options, Process ID and process state are fundamental pieces of information contained within the PCB. The other options are either not stored in the PCB or are too general.
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