parallel computing set 2 Detailed Explanation And More Example

Question : 1

Data dependence is

a) Involves only those tasks executing a communication operation

b) It exists between program statements when the order of statement execution affects the results of the program.

c) It refers to the practice of distributing work among tasks so that all tasks are kept busy all of the time. It can be considered as minimization of task idle time.

d) None of these

Question : 2

Non-Uniform Memory Access (NUMA) is

a) Here all processors have equal access and access times to memory

b) Here if one processor updates a location in shared memory, all the other processors know about the update.

c) Here one SMP can directly access memory of another SMP and not all processors have equal access time to all memories

d) None of these

Question : 3

In the threads model of parallel programming

a) A single process can have multiple, concurrent execution paths

b) A single process can have single, concurrent execution paths.

c) A multiple process can have single concurrent execution paths.

d) None of these

Question : 4

Point-to-point communication referred to

a) It involves data sharing between more than two tasks, which are often specified as being members in a common group, or collective.

b) It involves two tasks with one task acting as the sender/producer of data, and the other acting as the receiver/consumer.*

c) It allows tasks to transfer data independently from one another.

d) None of these

Question : 5

Collective communication

a) It involves data sharing between more than two tasks, which are often specified as being members in a common group, or collective.

b) It involves two tasks with one task acting as the sender/producer of data, and the other acting as the receiver/consumer.

c) It allows tasks to transfer data independently from one another.

d) None of these

Question : 6

In shared Memory

a) Changes in a memory location effected by one processor do not affect all other processors.

b) Changes in a memory location effected by one processor are visible to all other processors

c) Changes in a memory location effected by one processor are randomly visible to all other processors.

d) None of these