<span>In general you want to use the cheapest storage medium who's speed is compatible with the function it needs to perform. For active storage that's handled while running programs, you need memory whose speed is closely matched to the processor speed. And that would be the rather expensive semiconductor memory which is close to ideal for the task. But semiconductor memory has the disadvantage of being expensive and it loses the values stored when power is lost. So slower, persistent storage is used such as SSD (Solid State Drives) and hard disks. That media is cheaper, but slower, but still fast enough to handle tasks such as loading programs and data into memory for execution, or storing data generated by programs to persistent storage. But as with all man made things, disasters happen. Computers break down, hard disks crash, floods and fires happen, etc., and as a result data is lost. So we make backups. Backups have to have a lot of storage and they have to be cheap. But they don't need rapid access, you can start at the beginning and read (or write) all the way to the end. And for that purpose, magnetic tape is ideal. Magnetic tape is actually quite fast when you're simply streaming a continuous stream of data without any need to randomly access any piece of that data. And it's cheap, so you're willing to make a back up copy of your system and store that backup off site so a single disaster won't destroy both the primary system and the backup.</span>
Answer: All of these.
Explanation: Lets take a two-dimensional array alphabet[4][4]
Lets say this array contains the following elements: Example 1
a b c d
l i o n
f e l l
s t e m
These are the strings with same length. So this 2D array can contain strings of same length.
Now lets take another 2D array Example 2
a b c
h i n t
s o
e g g
2D array can have all these above mentioned elements. So it can contain strings of different lengths.
Now consider the Example 2. Some places for the elements are left. This isn't an issue for 2D array. So it can contain uninitialized elements too.
So the answer is All of above.
value = whatever you want
if not value < 13.6:
print("Value is greater than or equal to 13.6.")
else:
print("Value is less than 13.6.")
D .All the above.
Explanation:while in the military you can take online courses during service or you can can choose to do it before or after
