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frozen [14]
3 years ago
12

A(n) ____ is unique if the value (content) in that field appears only in one record.

Computers and Technology
1 answer:
Phantasy [73]3 years ago
5 0
A key is unique if the value(content) in that field appears only in one record
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T F The exit function can only be called from main .
ElenaW [278]

Answer:

FALSE

Explanation:

The exit function is used to terminate or halt the process.

Syntax-

            void exit(int status)  

Exit function (exit()) can be used in any function not only main() and it will terminate your whole process.

<u></u>

<u>Example-</u> C Program

#include<stdio.h>

#include <stdlib.h>  

//  function declaration

float exitexample ( float x );                                

// Driver program

int main( )                

{

 float a, b ;

 printf ( "\nEnter some number for finding square \n");

  scanf ( "%f", &a ) ;

 // function call

 b = exitexample ( a ) ;                      

 printf ( "\nSquare of the given number %f is %f",a,b );  

/*This will not printed as exit function is in exitexample() function*/

}

float exitexample ( float x )   // function definition  

{

 exit(0);    //exit function

   float p ;

  p = x * x ;

return ( p ) ;

}

5 0
4 years ago
you turn on your desktop computer. You can hear the fans start up, but the monitor remains blank. You wait a while, but it doesn
brilliants [131]

Answer:

Processor , Video-card  , Memory

Explanation:

If you turn on your desktop computer and the monitor remains blank, the problem might either be as a result of Processor not working, Video card bad and memory not sitting well.

if the problem is associated with processor, do the following:

  • Check if the power LED light on the motherboard is on or off.
  • If the LED light is off, check for motherboard or power supply issues.
  • If the LED light is on, check if the processor fan spins when the system is powered on.

Another major cause could be that the Video card is bad first thing to do is Update the drivers, then reseat the Videocard or probably change it.

Lastly memory module is loose, the computer might not display an image. In other words, your computer starts but the screen is black.

Now, you can try resetting the memory modules to fix the "PC turns on but no display" issue. Remove memory module from the memory slot, and then put it back into the slot to get a better connection so that the computer can recognise the memory.

8 0
4 years ago
When a formula contains the address of a cell, it is called a(n)
Shalnov [3]
When a formula contains the address of a cell, it is called a c<span>ell reference.

hope this helps!</span>
8 0
4 years ago
Using the XML Document below (library with books), define the following queries in XQuery: (a) Give the titles of all Books sort
Softa [21]

Answer:

Explanation:

a)use order by clause for sorting

for $x in doc("books.xml")/bib/book order by xs:float($x/price) return $x/title (default sorted in ascending order)

or

for $x in doc("books.xml")/bib/book order by xs:float($b/price) descending  return $b/title (sorted in descending order)

b)doc("books.xml")//book[author = 'Abiteboul']

c)for $x in distinct-values(doc("bib.xml")/bib/book/author)

return <res>

<name>{$x}</name>

<count>

 {count (doc("bib.xml")//book[exists(indexof(author,$x))]) }

</count>

<res>

3 0
3 years ago
9. If you want to change the Header text of any Form then which property will you use
Lady_Fox [76]

Answer:

header

Explanation:

i would use header

8 0
3 years ago
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