What prevents a process from accessing another process' data?

The correct answer is B. Process isolation. Process isolation is the OS-level mechanism that gives each process its own separate address space, preventing one process from reading or writing another process's memory. Memory segmentation is a hardware technique that supports isolation but is the mechanism rather than the…

Submitted by naveen.iyer· Apr 18, 2026Access Controls

Question

Options

AMemory segmentation
BProcess isolation
CThe reference monitor
DData hiding

How the community answered

(40 responses)

A
3% (1)
B
90% (36)
C
3% (1)
D
5% (2)

Explanation

Process isolation is the OS-level mechanism that gives each process its own separate address space, preventing one process from reading or writing another process's memory. Memory segmentation is a hardware technique that supports isolation but is the mechanism rather than the concept. The reference monitor controls access to objects based on policy but operates at a higher abstraction layer. Data hiding is an object-oriented programming principle, not an OS security control. Process isolation is the direct, correct answer.

Topics

#Process isolation#Memory protection#Operating system security#Access control

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