If variable a is host variable and dev_a is a device (GPU) variable, to copy input from variable a to variable dev_a select correct statement:
A)memcpy( dev_a, &a, size);
B)cudamemcpy( dev_a, &a, size, cudamemcpyhosttodevice );
C)memcpy( (void*) dev_a, &a, size);
D)cudamemcpy( (void*) &dev_a, &a, size, cudamemcpydevicetohost );

Question

Quizplus · Accepted Answer

B) cudaMemcpy( dev_a, &a, size, cudaMemcpyHostToDevice ); is the correct statement for copying data from the host variable a to the device variable dev_a. This function is specifically designed for copying data between host and device memory in CUDA applications.

If Variable a Is Host Variable and Dev_a Is a Device