WorksheetsOperating System Concepts and Security Quiz-2
Total questions: 20
Worksheet time: 7mins
----------- 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.
In UNIX systems, there are special processes that run in the background to handle network connections
----------- decides whether a process (user or program) can access a file or resource.
Controlling access
Changing identities
Both of the above
None of the above
----------- contains function parameters and local variables
Heap Segment
Data segment
Stack Segment
Code segment
----------- is a formal security model designed to enforce information flow control in computer systems. It is based on lattice structures from mathematics, which help define
Low Water Mark Integrity
Biba Integrity Model
Denning Lattice Model
All the above
----------- Prevents lower-integrity subjects (users/processes) from writing to higher-integrity objects(files, databases, processes).
No Write-Up Rule:
No Read-Down Rule
Trust Propagation Control
Policy Enforcement
Leaking information based on the power consumption of a device during an operation
Timing Attacks
Power Analysis Attacks
All the above
None of the above
Restricting access to resources based on user permissions
Encryption
Authentication
Hashing
Access Control
----------- is a deliberate action taken to harm a system by exploiting one or more vulnerabilities.
Threat
Attack
Both of the above
None of the above
----------- is the trick or method an attacker uses to take advantage of that weakness.
Vulnerability
Error
Crash
Exploit
----------- is the most common information flow model in secure operating systems for enforcing secrecy
Biba Integrity Model
Bell-LaPadula (BLP) model
Denning Lattice Model
All the above
----------- an entity can access information at its own level.
Antisymmetry
Transitivity
Symmetry
Reflexivity
