BCA 4th semester
Operating system
2023 year
2020 BATCH
MCQ WITH ANSWERSHEET
- to access the services of the operating system. The interface is provided by the:.
a.Library
b. Assembly Instructions
c.System calls
d.API
a
2.which of the following is not the valid state of the thread?
a. Running
b.Parsing
c.Ready
d.Blocked
b
3.What does OS X have?
a.Monolithic kernel with modules
b.Micro kernel
c.Monolithic kernel
d.Hybrid kernel
d
4.When does test and set instruction get executed?
a.periodically
b.after a Particular process
c.atomically
d.at the end of process
c
5.The signal operations of the semaphore basically works on the basic …….system calls.
a.continue()
b.wakeup()
c.getup()
d.start
b
6. The request and release of resources are…..
a.Command line statements
b.Interrupts
c.system calls
d.special programs
c
7.what is used to point the address of a page table in memory?
a.Page Register
b. Program counter
c.stack pointer
d.page tabe base register
d
8.when hardware is accessed by reading and writing to specific memory locations, then it is called
a.Port-mapped I/O
b. controlled-mapped I/O
c.Bus-mapped I/O
d.None of the mentioned
d
9. the code segment that misuses its environment is called a…
a.Internal thief
b.Trojon horse
c. Code staker
d.virus
b
10. which of the following is not a major reason for building distributed systems?
a. Resources sharing
b. Computation speedup
c. Reliability
d.simplicity
d
