1. Sarah Diesburg Operating Systems CS 3430
Final Review
Sarah Diesburg
Operating Systems
CS 3430

2. Coverage
~70% points based on new lecture material since the last session
Non-cumulative section
~30% points for everything
Cumulative section

3. Coverage
Many points based on your ability to apply various principles learned in class
Especially in cumulative section
Nothing directly over coding projects

4. File Systems and Disk Management
Definitions
File
File header

5. File Systems and Disk Management
Short answers
File system components
Disk management, naming, protection, reliability
Ways to access a file
Sequential, random, content-based
File usage patterns

6. File Systems and Disk Management
Short answers
Disk allocation policies
Contiguous, link-list, segment-based, indexed, multilevel indexed, hashed

7. Naming and Directories
Definitions
i_node
Directory
Name collisions
Absolute path name
Path resolution

8. Naming and Directories
Short answers
Different ways to organize a name space
Flat name space
Hierarchical name space
Relational name space
Contextual naming
Content-based naming

9. Transactions and Reliability
Definitions
Metadata
fsck
Journal
Transaction
Commit
Striping

10. Transactions and Reliability
Short answers
Characteristics of a transaction
Steps to a transaction
RAID levels

11. Protection and Security
Definitions
Security
Protection
Access matrix
Access control list
Capability list

12. Protection and Security
Short answers
Three goals of security
confidentiality, data integrity, system availability
Three security components
authentication, authorization, enforcement
Kerberos protocol
Public key encryption

13. Protection and Security
Short answers
Classes of security problems
Eavesdropping, abuse of privilege, imposter, Trojan horse, salami attack, logic bomb, denial-of-service attacks
3-Factor authentication
What you are
What you have
What you know

14. Distributed File Systems
Definitions
Stateless protocol
Idempotent functions

15. Distributed File Systems
Short answers
Design principles of NFS
NFS vs. AFS
xFS design principles
Write consistency models for NFS, AFS, and xFS

16. Everything CPU scheduling schemes Deadlock resolution techniques
Demand paging algorithms
Booting sequence
Ways to access storage device
Address translation schemes

17. Some Exam-taking Techniques
Use bullets instead of complete sentences
State what you do know and why existing methods do not work