...packets. I hope this helps.
Answer:
Arrays are indexed from 0 in pretty much every language, except stupid Microsoft languages.
Lets say that ARR_SIZE is 5 for example.
So you have an array of 5 elements. They are indexed from 0 - 4.
arr[0] // First element
arr[4] // Last element
Therefore arr[ ARR_SIZE -1 ] is the last element of the array.
That's why for loops to iterate through arrays are wrote like:
for(int i = 0; i < ARR_SIZE; ++i)
He could create foreign keys, which are basically columns in a table with values that identify a record from another table.
However, even without foreign keys you can construct queries that link data from multiple tables together.
Answer:
2. Scientists use seismometers to measure the earthquake activity that occurs beneath a volcano. They then predict the eruption of that volcano.
Explanation:
The options are:
1. Before a volcano erupts, earthquake activity beneath the volcano decreases.2. Scientists use seismometers to measure the earthquake activity that occurs beneath a volcano. They then predict the eruption of that volcano.3. When a volcano erupts, the amount of carbon dioxide and sulfur dioxide emitted decreases. 4.Scientists measure the amount of these gases to determine the amount of magma present in the volcanic reservoir.
The answer is certainly 2. as seismometers are being used to find out the details of the earthquake activities which occur inside a volcano. And with this information, the volcanologists then predict the eruption of that particular volcano. Hence, the 2nd option does not have any factual errors, and all the others have factual errors.
