Questions

Windows NT uses protection mechanism called rings provides by the process to implement separation between the user mode and kernel mode.

He cannot issue an ordinance , when both the Houses of Parliament are in session. Every ordinance issued by the President should be laid before both Houses of Parliament, within six weeks of re-assembly of Parliament . The president may also withdraw an ordinance at any time he likes.

A computer program is a set of instructions i.e algorithm that are to be executed to complete a task.

It is a useful, memory-saving technique for multiprogrammed timesharing systems. A Reentrant Procedure is one in which multiple users can share a single copy of a program during the same period. Reentrancy has 2 key aspects: The program code cannot modify itself, and the local data for each user process must be stored separately. Thus, the permanent part is the code, and the temporary part is the pointer back to the calling program and local variables used by that program. Each execution instance is called activation. It executes the code in the permanent part, but has its own copy of local variables/parameters. The temporary part associated with each activation is the activation record. Generally, the activation record is kept on the stack.

Note: A reentrant procedure can be interrupted and called by an interrupting program, and still execute correctly on returning to the procedure.