Which of the following statements about parallelism is/are FALSE? 1. In data parallelism, the same task is executed on the same data at the same time 2. A task dependency graph allows one to plan parallel tasks 3. If a task depends on the results of another task, they cannot run in parallel Select one: a. 2 only b. 1 and 3 c. 1 and 2 d. 1 only e. 2 and 3 Clear my choice Which of the following statements on the reduction parallel pattern is/are TRUE? 1. A reduction pattern combines data elements using an associative operator into a single element 2. Synchronisation is not required when accessing data in a reduction pattern 3. A reduction pattern typically processes half the number of elements at each step Select one: a. 2 only b. 2 and 3 c. 1 and 3 d. 1 and 2 e. 1 only Clear my choice Which of the following statements related to data on the host and device is/are FALSE? 1. Kernel arguments must be set explicitly using cl::Kernel::setArg() on the host 2. The device initiates data transfers to the host 3. Arrays must be transferred to the device using a buffer object Select one: a. 2 only b. 1 only c. 1 and 3 d. 1 and 2 e. 2 and 3 Clear my choice

Which of the following statements about parallelism is/are FALSE? 1. In data parallelism, the same task is executed on the same data at the same time 2. A task dependency graph allows one to plan parallel tasks 3. If a task depends on the results of another task, they cannot run in parallel Select one: a. 2 only b. 1 and 3 c. 1 and 2 d. 1 only e. 2 and 3 Clear my choice Which of the following statements on the reduction parallel pattern is/are TRUE? 1. A reduction pattern combines data elements using an associative operator into a single element 2. Synchronisation is not required when accessing data in a reduction pattern 3. A reduction pattern typically processes half the number of elements at each step Select one: a. 2 only b. 2 and 3 c. 1 and 3 d. 1 and 2 e. 1 only Clear my choice Which of the following statements related to data on the host and device is/are FALSE? 1. Kernel arguments must be set explicitly using cl::Kernel::setArg() on the host 2. The device initiates data transfers to the host 3. Arrays must be transferred to the device using a buffer object Select one: a. 2 only b. 1 only c. 1 and 3 d. 1 and 2 e. 2 and 3 Clear my choice

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Concept explainers

Concurrency Control

The simultaneous occurrence of two or more operations is called concurrence and the situation is called concurrency. In concurrency, the function of one operation can affect the function of the other and put data integrity at risk. Hence, management for the control of concurrency is required. The management or controlling system in the Database Management System (DBMS) that coordinates concurrent access is called the concurrency control system.

Question

Which of the following statements about parallelism is/are FALSE?
1. In data parallelism, the same task is executed on the same data at the same time
2. A task dependency graph allows one to plan parallel tasks
3. If a task depends on the results of another task, they cannot run in parallel
Select one:
a.
2 only
b. 1 and 3
c. 1 and 2
d. 1 only
e. 2 and 3
Clear my choice
Which of the following statements on the reduction parallel pattern is/are TRUE?
1. A reduction pattern combines data elements using an associative operator into a single element
2. Synchronisation is not required when accessing data in a reduction pattern
3. A reduction pattern typically processes half the number of elements at each step
Select one:
a. 2 only
b. 2 and 3
c. 1 and 3
d. 1 and 2
e. 1 only
Clear my choice
Which of the following statements related to data on the host and device is/are FALSE?
1. Kernel arguments must be set explicitly using cl::Kernel::setArg() on the host
2. The device initiates data transfers to the host
3. Arrays must be transferred to the device using a buffer object
Select one:
a. 2 only
b. 1 only
c. 1 and 3
d. 1 and 2
e. 2 and 3
Clear my choice

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