Structures
1. What is the main function of the command interpreter?
A.  to get and execute the next user B.  to provide the interface between the API and application program C.  to handle the files in operating system D.  none of the mentioned
2. 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
3. In the layered approach of Operating Systems __________
A.  

Bottom Layer(0) is the User interface

 B.  

Highest Layer(N) is the User interface

 C.  

Bottom Layer(N) is the hardware

 D.  

Highest Layer(N) is the hardware