For each of the following chose true (T) or false (F) and circle your choice. If

Question

For each of the following chose true (T) or false (F) and circle your choice. If False, write the correct word or phrase that matches the description:

1.In a SIMD computer, each processor memory has a full copy of the operating system (T/F)

Correct phrase if false: ____________

2. If a collective call is made by multiple threads, multiple actions will take place (T/F)

Correct phrase if false: ___________

3.The part of the code which must be executed by only one thread at a given time to avoid multiple writers problems is called relaxed code (T/F)

Correct phrase if false: _______________

4.A lock is a synchronization construct that ensures that all executing processes reach that point before any of the proceeds any further in the code (T/F)

Correct phrase if false: ___________

5.Due to the Amdahl’s law programs with very large data inputs cannot scale in performance (T/F)

6.Programming models are abstractions that can enable performance portability enabling code writers to mover across systems and architects to innovate (T/F)

Correct phrase if false: ____________________

7.SPMD execution simplifies the programming of SIMD systems (T/F)

Correct phrase if false: ______________

8.The message passing programming paradigm does not enable programmers to exploit locality (T/F)

Correct phrase if false: _________________

9.ExaFLOPS is a million million FLOPS. (T/F)

Correct phrase if false: ____________

10.In a SIMD architecture processors can have independent branches in the code (T/F)

Correct phrase if false: _________

Explanation / Answer

1. FALSE

SIMD computers generally require less memory since only one copy of the operating system and program is needed to be stored, in contast to MIMD computers in which a copy of the operating system and program is required for each processor.

2. TRUE

3. TRUE

4. TRUE

5. FALSE

Amdahl’s law does not effect programs with very large data inputs in scaling performance.

7. TRUE

8. FALSE

It supports both parralarity and enable programmers to exploit locality.

9. FALSE

Petaflop is a million million FLOPS

10. TRUE

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