Question

Consider a typical process P in the critical section. Arrange the following statements of code to make a valid general structure.
(A). Critical section
(B). Remainder section
(C). Entry section
(D). Exit section

• A. (C), (B), (A), (D)
• B. (C), (A), (B), (D)
• C. (C), (A), (D), (B)
• D. (C), (B), (D), (A)

Hint:

In the general structure of critical section code, Entry comes before Critical, and Exit comes after Critical, followed by the Remainder section.

Answer 1

The Correct Option is A

Step 1: Understanding the sections. 
- **Critical section** (C): This is the section where the process accesses shared resources. 
- **Entry section** (A): This is the section before the critical section, where the process requests entry. 
- **Remainder section** (B): The section after the critical section, where the process releases the resource and performs other tasks. 
- **Exit section** (D): This section handles the exit process from the critical section. 
 

Step 2: Arrange the sections correctly. 
To form a valid structure for a process in the critical section: 

- The process first enters the **Entry section** (A), checks for any conditions (if needed), and then moves to the **Critical section** (C). 

- After completing its task in the **Critical section**, the process moves to the **Exit section** (D) to release the resource. 

- Finally, the process moves to the **Remainder section** (B) for other tasks.

Step 3: Conclusion. 
The correct order of statements is **(C), (B), (A), (D)**.