Grace Murray Hopper invented it
Answer:
PING
Explanation:
To check if there's still connectivity between the computer and server, I would use the ping command.
The ping command is primarily a TCP/IP command. What this command does is to troubleshoot shoot. It troubleshoots connection and reachability. This command also does the work of testing the name of the computer and also its IP address.
You can add a bookmark by clicking the star icon
<u>Explanation:</u>
Sometime you may have to visit a same page many times. It will be very difficult to search every time and go to the same page. It will be waste of time. Hence, there is an option available so that you can visit the page that you want to access many time without wasting your time.
In order to visit the page that you want to access more frequently you can use two ways. Most of the browsers will support to visit the most frequently accessed websites using the keyboard shortcuts Ctrl+D. You can also click on the star icon that is present in the address bar of the browser's top portion.
Answer:
Explanation:
a. To initiate a DMA transfer, the CPU first sets up the DMA registers, which contain a pointer to the source of a transfer, a pointer to the destination of the transfer, and a counter of the number of bytes to be transferred. Then the DMA controller proceeds to place addresses on the bus to perform transfers, while the CPU is available to accomplish other work.
b. Once the entire transfer is finished, the DMA controller interrupts the CPU.
c. Both the CPU and the DMA controller are bus masters. A problem would be created if both the
CPU and the DMA controller want to access the memory at the same time. Accordingly, the CPU should be momentarily prevented from accessing main memory when the DMA controller seizes the memory bus. However, if the CPU is still allowed to access data in its primary and secondary caches, a coherency issue may be created if both the CPU and the DMA controller update the same memory locations.
