Answer:
Trap is a software interrupt that occurs when there is a system call, while hardware interrupt occurs when a hardware component needs urgent attention.
Explanation:
Interrupt is an input signal that disrupt the activities of a computer system, giving immediate attention to a hardware or software request.
In trap interrupt, the system activities are stop for a routine kernel mode operation, since it has a higher priority than the user mode. At the end of the interrupt, it switches control to the user mode.
The hardware interrupt is a signal from hardware devices like the input/output devices, storage and even peripheral devices that draws an immediate attention of the processor, stopping and saving other activities and executing the event with an interrupt handler.
Tables are used to display information in a more arranged and organized manner.
Various ways of adding a row in an already existing table are:
1) By drawing a row in the table using the draw option.
2) By using the insert option under the Table Tools tab.
3) By designing the table with an added row using the Design tab.
<u>Explanation:</u>
In the insert option, go to the extreme right corner. There appears an option of Draw Table. Draw another row and it gets added.
This tab contains two tabs, Design and Layout that enable you to rapidly arrange your table, embed or erase lines and sections, set the arrangement for cells, and organization the typography of the content in your table.
Thus, a table and its capacity are built up from here on and open for designing.
Answer:

Explanation:
Given
--- starting index
Required
Change the starting index to 
We have:

To change the starting index to k, we simply rewrite as:

<em>In this case; k=1; so, the starting index will be: </em>
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D. Por el uso de tubos de vacio.