Top 550+ Solved Operating System (OS) MCQ Questions Answer
Q. Which facility dynamically adds probes to a running system, both in user processes and in the kernel?
a. dtrace
b. dlocate
c. dmap
d. dadd
Q. Which one of the following is not a real time operating system?
a. vxworks
b. qnx
c. rtlinux
d. palm os
Q. The OS X has
a. monolithic kernel
b. hybrid kernel
c. microkernel
d. monolithic kernel with modules
Q. The systems which allow only one process execution at a time, are called
a. uniprogramming systems
b. uniprocessing systems
c. unitasking systems
d. none of the mentioned
Q. In operating system, each process has its own
a. address space and global variables
b. open files
c. pending alarms, signals and signal handlers
d. all of the mentioned
Q. In Unix, Which system call creates the new process?
a. fork
b. create
c. new
d. none of the mentioned
Q. What is interprocess communication?
a. communication within the process
b. communication between two process
c. communication between two threads of same process
d. none of the mentioned
Q. Which system call can be used by a parent process to determine the termination of child process?
a. wait
b. exit
c. fork
d. get
Q. The address of the next instruction to be executed by the current process is provided by the
a. cpu registers
b. program counter
c. process stack
d. pipe
Q. The number of processes completed per unit time is known as
a. output
b. throughput
c. efficiency
d. capacity
Q. What is a Process Control Block?
a. process type variable
b. data structure
c. a secondary storage section
d. a block in memory
Q. The entry of all the PCBs of the current processes is in
a. process register
b. program counter
c. process table
d. process unit
Q. What is the degree of multiprogramming?
a. the number of processes executed per unit time
b. the number of processes in the ready queue
c. the number of processes in the i/o queue
d. the number of processes in memory