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8090 [49]
3 years ago
13

CODE EXAMPLE 3-1 SELECT vendorName, invoiceNumber, invoiceDate, invoiceTotal FROM vendors INNER JOIN invoices ON vendors .vendor

ID = invoices.vendorID WHERE invoiceTotal >= 500 ORDER BY vendorName DESC How many columns will the result set have?
Computers and Technology
1 answer:
Nataliya [291]3 years ago
8 0

Answer:

The correct answer for the given question is 4

Explanation:

In the given code it select the vendorName, invoiceNumber, invoiceDate, invoiceTotal from vendors ,invoices table. when required condition is fullfill i.e vendors .vendorID = invoices.vendorID and invoiceTotal >= 500 .

So their are 4 column in the result set i.e vendorName, invoiceNumber, invoiceDate, invoiceTotal .

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Answer:

A

Explanation:

strBuf.charAt(strBuf.length() - 1)

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In microsoft word, when you highlight existing text you want to replace, you’re in
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Redesign the cover of science textbook using at least two different graphics​
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2 years ago
What was the strategy the company adopted for ERP implementation?
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2 years ago
Using the program below, explain what the output will be at LINE A. 1 #include 2#include 3#include 4 5 int value - 128; 6 7 int
slega [8]

Answer:

This is the complete correct program:

#include <stdio.h>

#include<sys/types.h>

#include<unistd.h>

int value = 128;

int main()

{

  pid_t pid;

  pid=fork();

  if (pid==0) /* child process */

  {

  value +=8;

  return 0; }

  else if (pid > 0) {/* parent process */

 wait (NULL);

 printf ("PARENT: value =%d\n" ,value); /* LINEA */

 return 0;

}

}

The output of the LINE A is:

PARENT: value = 128

Explanation:

The fork() function used in the program creates a new process and this process is the child process. The child process is same as the original process having its own address space or memory.

In the child process the value of pid is 0. So the if condition checks if pid==0. Then the child process adds 8 to the value of its variable according to the following statement  

value +=8;

Now the original process has value = 128. In else if part the parents process has the value of pid greater than zero and this portion of the program is of the parent process :

else if (pid > 0)

{ wait (NULL);

printf ("PARENT: value =%d\n" ,value);

return 0; }

So the value 128 is printed at the end in the output.

wait(NULL) is used to wait for the child process to terminate so the parent process waits untill child process completes.

So the conclusion is that even if the value of the variable pid is changed in the child process but it will not affect the value in the variable of the parent process.

5 0
3 years ago
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