You are designing a parallel algorithm for an OpenMP application. You write the following pseudocode to represent the sequential logic of the algorithm. (Line numbers are included for reference only.)

01 do i = 1, m
02 do j = 1, n
03 x = i/real(m)
04 y = j/real(n)
05 depth[j, i] = calculate_val(x, y)
06 enddo
07 enddo

You need to identify the variables that must be declared as private variables to correctly parallelize the algorithm. Which set of variables should you select?

You design an application that processes large amount of user data. The application consists of multiple producer and consumer threads. All threads share a single task queue. You write the following pseudocode. (Line numbers are included for reference only.)

01 task_available = 0; // shared variable
02 Producer_Thread:
03 inserted = 0 // private
04 while (!done()) {
05 inserted = 0;
06 create_task(my_task); //private
07 while (inserted == 0) {
08 if (task_available == 0) {
09 insert_into_queue(my_task);
10 task_available = 1;
11 inserted = 1;
12 }
13 }
14 }
15 end Producer_Thread
16 Consumer_Thread:
17 extracted = 0; // private
18 while (!done()) {
19 extracted = 0;
20 while (extracted == 0) {
21 if (task_available == 1) {
22 extract_from_queue(my_task);
23 task_available = 0;
24 extracted = 1;
25 }
26 }
27 }
28 process_task(my_task);
29 end Consumer_Thread

You need to ensure that multiple instances of the producer and consumer threads can run without deadlocks.
Which two actions should you perform? (Each correct answer presents part of the solution.
Choose two.)

You review the design of a module of an online banking system. The module will provide real-time statistics related to payments made by the users. The module must support 1,000 concurrent users. A new instance named Thread1 is created for every user who accesses the banking system. The following pseudocode represents the design of the module. (Line numbers are included for reference only.)

01 var amount = 0 // shared variable represents amount of transfer
02 var credit = 0 // shared variable represents total credit
03 var debit = 0 // shared variable represents total debit
04 Thread1:
05 reads userInput from console
06 amount = userInput
07 creates new Thread2 instance and runs it
08 creates new Thread3 instance and runs it
09 Thread2:
10 value = amount
11 if (value > 0) debit = debit – value
12 Thread3:
13 value = amount
14 if (value > 0) credit = credit + value

A new instance named Thread1 is created for every user who accesses the banking system. You need to ensure that no data race occurs when the module runs.
What should you do?

You create a new Microsoft Message Passing Interface (MPI) application. The application will be deployed on a Windows HPC Server 2008 cluster. You plan to debug the application by using the MPI Cluster Debugger in Visual Studio 2008. You need to ensure that you can successfully launch and use the MPI Cluster Debugger.
What should you do?

You are an application developer.
You plan to debug a Microsoft Message Parsing Interface (MPI) application by using the MPI Cluster Debugger. You set appropriate breakpoints in the application. You need to evaluate the value of a variable on different MPI ranks when a breakpoint is encountered. What should you do?