In multi-programmed systems, it is advantageous if some programs such as editors and compilers can be shared by several users. Which of the following must be true of multi-programmed systems in order that a single copy of a program can be shared by several users?
I. The program is a macro
II. The program is recursive
III.The program is reentrant
A)I only
B)II only
C)Ill only
D)I, II and III

Question

Quizplus · Accepted Answer

For a program to be shared by several users in a multi-programmed system, it must be reentrant. A reentrant program is written in such a way that it can be interrupted in the middle of its execution and safely called again ("re-entered") before its previous executions complete. This allows multiple users to share a single copy of the program concurrently, making efficient use of system resources. Being a macro or recursive does not inherently enable a program to be shared by multiple users in the same way.

In Multi-Programmed Systems, It Is Advantageous If Some Programs Such