41. “”Operating System”” means _________________________
A) a way of computer drives works
B) a set of devices and programs
C) a set of programs which controls computer working.
D) above all are correct
see answer
C) a set of programs which controls computer working.
42. The, basic types, of OS, are _________________________
A) Direct and interactive
B) Batch and interactive
C) batch and time sharing
D) Sequential and real time
see answer
B) Batch and interactive
43. The, simplest way, of deadlock, is to……………………………………………
A) Kill one of the processes
B) Lock one of the processes
C) Preempt a resource
D) Rollback
see answer
A) Kill one of the processes
44. “”Throughput”” of a system, is ______________________________
A) Number of times the program is invoked by the system
B) Number of requests made to a program by the system
C) Number of programs processed by it per unit time
D) above all are correct
see answer
C) Number of programs processed by it per unit time
45. Which, of the, following is, not OS, layer?
A) Application Programs
B) Critical Section
C) Kernel
D) Shell
see answer
B) Critical Section
46. “Round robin scheduling” is essentially, the preemptive, version of: ________________________
A) Shortest remaining
B) Longest time first
C) first in first out
D) Shortest job first
see answer
C) first in first out
47. The process, that are residing in, the main memory, and are waiting, to execute, are kept on a ,,list called the:
A) Wait queue
B) Device queue
C) Job queue
D) ready queue
see answer
D) ready queue
48. Which, of the following, describes the ability, of an OS to, support multiple, concurrent paths, of execution, within a single, process?
A) Multitasking
B) Multiprogramming
C) Multithreading
D) Multiprocessing
see answer
C) Multithreading
49. “Virtual memory” is: _______________________
A) An illusion of extremely large main memory
B) A type of memory used in super computers
C) An extremely large main memory
D) An extremely large secondary memory
see answer
A) An illusion of extremely large main memory
50. A ”thread” is a ___________________________ Process.
A) Inter thread
B) Light weight
C) Heavy weight
D) Multiprocessor
see answer
B) Light weight
