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2 years ago

________ is used to undo unwanted database changes.

Computers and Technology

2 answers:

trapecia [35]2 years ago

8 0

Backward Recovery
<span> ________ is used to undo unwanted database changes. </span>

riadik2000 [5.3K]2 years ago

5 0

Backward Recovery would be the answer.

(:

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A contact list is a place where you can store a specific contact with other associated information such as a phone number, email

Arte-miy333 [17]

Answer:

# The user in prompted for input and stored in userInput

userInput = str(input("Enter the contact: "))

# The user input is splitted and stored in splitUserInput

# splitUserInput is a list because split returns a list

splitUserInput = userInput.split(" ")

# The user is prompt to enter the search contact

# The search contact will have the first letter capitalize

# should it be entered in lower case all through

searchContact = str(input("Enter the search contact: "))

# loop through the list

for i in range(len(splitUserInput)):

# compare if the string at any value of i

# is the same as the searchContact

# we display the string ahead of it

# by adding 1 to the index

if(splitUserInput[i] == searchContact):

print(splitUserInput[i + 1])

Explanation:

A sample screenshot is attached. The code is written in Python 3 and well commented.

The program prompt the user for input then split the input into a list. It then asked for a contact to search for. It begins looping through the list, if the search contact is found at any index, then it prints what is in front of the index.

5 0

2 years ago

Write a statement that defines an ifstream object named inputFile and opens a file named "Friends.txt".

Simora [160]

Answer:

ifstream inputFile;

inputFile.open("Friends.txt");

Explanation:

Though, the programming language is not stated, questions like this are often from C++.

The first statement defines the ifstream object using the following syntax.

ifstream [object_name]

In this case, the object name is inputFile

So, the syntax becomes

ifstream inputFile;

The next line opens a file using the following syntax.

[object_name].open("Filename")

Here, object_name is inputFile and filename is Friends.txt

So, the open statement becomes

inputFile.open("Friends.txt")

5 0

2 years ago

Given three floating-point numbers x, y, and z, output x to the power of y, x to the power of (y to the power of z), the absolut

Angelina_Jolie [31]

Answer:

float x

float y

float z

x = Get next input

y = Get next input

z = Get next input

Put RaiseToPower(x, y) to output

Put "\n" to output

Put RaiseToPower(x, RaiseToPower(y, z)) to output

Put "\n" to output

Put AbsoluteValue(x) to output

Put "\n" to output

Put SquareRoot(RaiseToPower(x*y, z)) to output

Explanation:

The first three lines of code is simply declaring the data type of the x, y and z variables which was declared as float type meaning number with decimal points.

The next three lines after the first three lines is getting the input from the user

In coral, we use Put <expression> to output to display <expression> to the console

For the first Put statement, I am telling the interpreter to display the value of x raised to the power of y to the console by using Coral's RaiseToPower built-in math function

The Put "\n" to output statement scattered in the snippet is just for formatting reasons so that each result will be displayed in a newline

The next computation RaiseToPower(x, RaiseToPower(y, z)) is a bit nested but it is actually doing this: $x^{y^{z} }$