Operating System Concepts and Security Quiz-2

----------- is implemented using demand paging.

• Segmentation

• Paging

• Main Memory

• Virtual Memory

Generally the main memory is divided into a number of equal size partitions called

• Equal Allocation

• Priority Allocation

• Frames

• Pages

A process is busy swapping pages in and out is called

• Thrashing

• Pages

• Frames

• All the above

Cache means collection of

• Temporary Memory

• Pages

• Slabs

• None of the above

UNIX uses a ----------- that separates the kernel from user processes

• Memory Isolation

• Security Goals

• Both a and b

• protection mechanism

----------- contains global and static variables of a program.

• Stack Segment

• Data segment

• Heap Segment:

• Code segment

----------- means every access to every resource must be checked against access control rules.

• Verifiable

• Tamperproof

• Complete Mediation

• All the above

----------- describes a type of race condition vulnerability

• Time-of-Check-to-Time-of-Use

• Trusted Computing Base (TCB)

• Transition State

• None of the above

----------- is a type of malware that grants an attacker unauthorized, elevated access to a computer or network.

• Network-facing Daemons

• Rootkits

• Environment Variables

• Shared Resources

In UNIX systems, there are special processes that run in the background to handle network connections

• Rootkits

• Environment Variables

• Time-of-Check-to-Time-of-Use (TOCTTOU)

• Network-facing Daemons