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nikitadnepr [17]
3 years ago
15

An index purports to speed data retrieval. you, therefore, index every attribute in each table. select the likely consequence.

Computers and Technology
1 answer:
stira [4]3 years ago
4 0

Answer:

b. data entry slows as every INSERT , UPDATE, or DELETE statement must also update every index.

Explanation:

This process help to improve the speed of get data , it takes each element in the indexed column and save the location to get faster the data. But if you index every attribute in a table it going to take a lot of time locating each column in the respective index in each query(update, delete and insert). For that reason is necesary be carefull with this process and only put index in the relevant columns

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Implement a container class Stat that stores a sequence of numbers and provides statistical information about the numbers. It su
olga2289 [7]

Answer:

See explaination

Explanation:

Definition of Class 1:

class Stat:

def __init__(self, li):

self.li = li

def add(self, value):

self.li.append(value)

def __len__(self):

return len(self.li)

def min(self):

try:

return min(self.li)

except:

return "EmptyStatError: empty Stat does not have a min"

def max(self):

try:

return max(self.li)

except:

return "EmptyStatError: empty Stat does not have a max"

def sum(self):

return sum(self.li)

def mean(self):

try:

return float(sum(self.li))/float(len(self.li))

except:

return "EmptyStatError: empty Stat does not have a mean"

def __getitem__(self):

return self.li

def clear(self):

del self.li[:]

Definition of Class 2:

class intlist:

def __init__(self, li):

self.li = li

def append(self, value):

if type(value) == int:

self.li.append(value)

else:

print "NotIntError: Input is not an Integer."

def insert(self, index,value):

if type(value) == int:

self.li.insert(index, value)

else:

print "NotIntError: Input is not an Integer."

def extend(self, value):

i = 0

for temp in value:

if type(temp) == int:

i = i

else:

i = i+1

if i==0:

self.li.extend(value)

else:

print "NotIntError: Input is not an Integer."

def __setitem__(self, index, value):

self.insert(index, value)

def __getitem__(self, index):

return self.li[index]

def odds(self):

lis = []

for temp in self.li:

if temp%2 == 1:

lis.append(temp)

return lis

def evens(self):

lis = []

for temp in self.li:

if temp%2 == 0:

lis.append(temp)

return lis

Class 1 call:

s = Stat([])

s.add(2.5)

s.add(4.7)

s.add(78.2)

print len(s)

print s.min()

print s.max()

print s.sum()

print s.mean()

print s.li

s.clear()

print s.li

print len(s)

print s.min()

print s.max()

print s.mean()

print s.sum()

Class 2 call:

intl = intlist([])

print intl.li

intl = intlist([1,2,3])

print intl.li

intl.append(5)

print intl.li

intl.insert(1,99)

print intl.li

intl.extend([22,44,66])

print intl.li

print intl.odds()

print intl.evens()

print intl.li

intl[2] = -12

print intl[4]

6 0
4 years ago
Suppose we are sorting an array of eight integers using quicksort, and we have just finished the first partitioning with the arr
Mila [183]

Answer:

c. The pivot could be either 7 or 9.

Explanation:

Since we are trying to sort an array of eight integers using quick sort, from the first partitioning it shows that the pivot or the central point can either be 7 or 9. When you look at the array, it is only 7 and 9 that are placed correctly in the sorted array. Every element to the left of 7 and 9 are smaller and every element on the right of 7 and 9 are integers higher than them. Hence this shows that the pivot lies between 7 or 9.

6 0
3 years ago
One disadvantage of using the styles feature of a word processor is that you cannot modify existing styles. true or false
gayaneshka [121]
I think its false
but im not possitive

8 0
3 years ago
This device transmits data to all the workstations on a network. gateway hub router switch
marshall27 [118]
hub transmits to all workstations
Switch transmits to specific workstations
Gateway is a connection between subnets
Router locates the correct destination for packets
5 0
4 years ago
Read 2 more answers
Define time management and give two activities that you can do to help manage your tasks, homework, or projects better.
lions [1.4K]
Time management: <span>the ability to use one's time effectively or productively, especially at work also activities you can do would be organizing and making sure you get that essay done in under 30 mins </span>
5 0
3 years ago
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