IF a relation schema is in 3NF, it is in BCNF.true or falsa

Three reasons why users attach speakers to their computers.

ZanzabumX [31]

Answer:

Iv'e answered this question 2 times already lol. The purpose of speakers is to produce audio output that can be heard by the listener. Speakers are transducers that convert electromagnetic waves into sound waves. The speakers receive audio input from a device such as a computer or an audio receiver.

Explanation: I hope this helps!

8 0

3 years ago

Why might a variable used for output have to be of a different type then a variable used for input?

telo118 [61]

Answer:

You may use a different variable type for input in order to process the data appropriately and may use a different variable type to accommodate your program.

Explanation:

Your input may have to be different then output varying on what data you are processing.

For example, just like the last question you asked about calculating the area of the rectangle, your input MUST be converted to a different a numerical data type (i.e int or float) in order to do the math.

Based on your last question, if we didn't convert your input into a string your results wouldn't add the numbers together but only concatenate them. If I typed 3 & 5 as length & width, I would get 35 instead of 15.

Now another example is using functions (or methods whatever you want to call them), your input can be one thing and outputs another.

Let's say I want a function to tell me if I am smart. The way I want it to determine if its smart is by inputting my GPA into it, which is a numerical value. So the function would look something like this:

<u>Code (Python)</u>

def IsSmart(gpa):

if (gpa >= 4):

return True

else

return False

As you can see I am inputting a numerical value and it is outputting a boolean value. I can use this in a if else chain to spit out an output to the user.

7 0

3 years ago

If a user's input string matches a known text message abbreviation, output the unabbreviated form, else output: Unknown. Support

Molodets [167]

Answer:

Here is the JAVA program. I have added a few more abbreviations apart from LOL and IDK.

import java.util.Scanner; // to take input from user

public class MessageAbbreviation {

public static void main(String[] args) { //start of main() function body

Scanner input = new Scanner(System.in); // create object of Scanner

String abbreviation= ""; //stores the text message abbreviation

/* In the following lines the abbreviation string type variables contain the un-abbreviated forms */

String LOL = "laughing out loud";

String IDK = "i don't know";

String BFF = "best friends forever";

String IMHO = "in my humble opinion";

String TMI = "too much information";

String TYT = "take your time";

String IDC = "I don't care";

String FYI = "for your information";

String BTW = "by the way";

String OMG = "oh my God";

//prompts the user to enter an abbreviation for example LOL

System.out.println("Input an abbreviation:" + " ");

if(input.hasNext()) { // reads the abbreviation form the user

abbreviation= input.next(); }

// scans and reads the abbreviation from user in the abbreviation variable

/*switch statement checks the input abbreviation with the cases and prints the un abbreviated form in output accordingly. */

switch(abbreviation) {

case "LOL" : System.out.println(LOL);

break;

case "IDK" : System.out.println(IDK);

break;

case "BFF" : System.out.println(BFF);

break;

case "IMHO": System.out.println(IMHO);

break;

case "TMI": System.out.println(TMI);

break;

case "TYT": System.out.println(TYT);

break;

case "IDC": System.out.println(IDC);

break;

case "FYI": System.out.println(FYI);

break;

case "BTW": System.out.println(BTW);

break;

case "OMG": System.out.println(OMG);

break;

default : System.out.println("Unknown"); } } }

Explanation:

The program first prompts the user to enter an abbreviation. Lets say the user enters LOL. Now the switch statement has some cases which are the conditions that are checked against the input abbreviation. For example if the user enters LOL then the following statement is executed:

case "LOL" : System.out.println(LOL);

This means if the case is LOL then the message ( un abbreviated form) stored in the LOL variable is displayed on output screen So the output is laughing out loud.

Anything else entered other than the given abbreviations will display the message: Unknown

The output is attached as screen shot.

5 0

3 years ago

Read 2 more answers

6. How can you encrypt an entire drive, including files and folders belonging to other users? a. EFS b. User Account Control c.

matrenka [14]

Answer:

A.

Explanation:

Encrypting File System (EFS) is a file system which enables you to encrypt files, thus making them unviewable by any account but your own.

6 0

3 years ago

How does tracking changes relate to sharing a workbook in Excel?

ElenaW [278]

Answer:When you highlight changes as you work, Excel outlines any revisions (such as changes, insertions, and deletions) with a highlighting color. On the Review tab, click Track Changes, and then click Highlight Changes. Select the Track changes while editing. This also shares your workbook check box.

Explanation:

8 0

3 years ago