These Operating System MCQ and Answers – Protection – Access Matrix are asked in various examinations including BCA, MCA, GATE, and other tests. The questions based on the below Operating System MCQ and Answers – Protection – Access Matrix test your basic knowledge of MCQs on the topic of Operating Systems and the level of comprehension and grasp that you hold.
Operating System MCQ and Answers – Protection – Access Matrix
1. Which two rights allow a process to change the entries in a column?
a) copy and transfer
b) copy and owner
c) owner and transfer
d) deny and copy
Answer: a
2. Which is an unsolvable problem in access-matrix?
a) Owner override
b) Brute force
c) Access denied
d) Confinement
Answer: d
3. Which of the following objects require protection?
a) CPU
b) Printers
c) Motherboard
d) All of the mentioned
Answer: b
4. What is ‘separation’ in security of Operating systems?
a) To have separate login for different users
b) To have separate Hard disk drive/partition for different users
c) It means keeping one user’s objects separate from other users
d) None of the mentioned
Answer: c
5. What are the various roles of protection?
a) It is used to detect errors which can prevent contamination of system
b) It is used used to accelerate a process
c) It is used to optimize system downtime
d) None of the mentioned
Answer: a
6. Which of the following objects require protection?
a) Memory
b) Monitor
c) Power supply unit
d) All of the mentioned
Answer: a
7. In domain structure what is Access-right equal to?
a) Access-right = object-name, rights-set
b) Access-right = read-name, write-set
c) Access-right = read-name, execute-set
d) Access-right = object-name, execute-set
Answer: a
8. What is meaning of right-set?
a) It is a subset consist of read and write
b) It is a subset of all valid operations that can be performed on the object
c) It is a subset consist of read, write and execute
d) None of the mentioned
Answer: b
9. What is Domain?
a) Domain = Set of all objects
b) It is a collection of protection policies
c) Domain= set of access-rights
d) None of the mentioned
Answer: c
10. What does the access matrix represent?
a) Rows-Domains, Columns-Objects
b) Rows-Objects, Columns-Domains
c) Rows-Access List, Columns-Domains
d) Rows-Domains, Columns-Access list
Answer: a
11. What are the three additional operations to change the contents of the access-matrix?
a) copy
b) Owner
c) control
d) all of the mentioned
Answer: d
12. Who can add new rights and remove some rights?
a) copy
b) transfer
c) limited copy
d) owner
Answer: d
13. What are the three copyrights?
a) copy
b) transfer
c) limited copy
d) all of the mentioned
Answer: d