Answer:
The correct answer is C. Sometimes.
Explanation:
A database index is a structure that aims to speed up selections and selective operations on a database. An index reduces the number of comparisons required to find one or more database records. This avoids having to perform a so-called full table scan, whereby all records in the table have to be run through sequentially.
Therefore, if the search does not focus correctly on the necessary data, this search will not always determine the index of the goal. Therefore, the user must correctly handle the search keywords to collaborate with the system.
Answer:
120
Explanation:
This question is basically asking how many ways can we arrange 5 sizes of shirts if they come in 4 colors.
5 permutation of 4
To find permutation, we use the formula
P(n, r) = n! / (n - r)!
Where
n is the size of the shirts available, 5
r is the color of each shirt available, 4
P(5, 4) = 5! / (5 - 4)!
P(5, 4) = (5 * 4 * 3 * 2 * 1) / 1!
P(5, 4) = 120 / 1
P(5, 4) = 120
Therefore, the total number of shirts available is 120
Answer:
Option d is the method
Explanation:
public void update Hours(int more Hours)
{
hours += more Hours;}e. public int update Hours(int more Hours){return hours + more Hours;
}
Answer:
import random
def grid_maker(x, y):
return [ [str(random.randint(-30, 30)) for _ in range(x)]for _ in range(y) ]
print ('\n'.join(' '.join(row) for row in grid_maker(4, 5)))
Explanation:
We use a template function and we generate numbers between -30 and 30:
>>> [str(random.randint(-30, 30))]
We also use the str() method so we can later concatenate the integers with \n. If you do not specify the integers, it will cause a crash. Also, keep in mind if we use a variable to store the integers, it will come out more of like a seed than a random grid. For instance, output without the random integers in a variable:
-12 16 -18 -3
7 5 7 10
18 -21 -16 29
21 3 -4 10
12 9 6 -9
Vs with a variable:
-25 6 -25 -20
-25 6 -25 -20
-25 6 -25 -20
-25 6 -25 -20
-25 6 -25 -20
Next we specify the x and the y:
>>> for _ in range(x)]for _ in range(y) ]
Next we just print it and create a new line every time a row is made
hope this helped :D
