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natta225 [31]
3 years ago
15

A(n) _____ is a request for the database management software to search the database for data that match criteria specified by th

e user.
a. appeal
b. query
c. plea
d. frequency
Computers and Technology
2 answers:
timama [110]3 years ago
4 0
A query, specifically a select statement.
zhenek [66]3 years ago
3 0

Answer:

b. query

Explanation:

    Speaking of a database, a query can simply be an inquiring command, adding or altering tables from a database, for example:

SELECT NAME, LAST NAME FROM USERS WHERE ID = '' 55.555.555-55 ''

This query would return the NAME and SURNAME from the USERS table, from the record that has ID 55.555.555-55 '

   

    Unlike jQuery, which is a JavaScript library used for front end development.

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Write a client program that writes a struct with a privateFIFO name (call it FIFO_XXXX, where XXXX is the pid that you got from
ivann1987 [24]

Answer:

client code:

#include <stdio.h>

#include <fcntl.h>

#include <sys/stat.h>

#include <sys/types.h>

#include <unistd.h>

#include <stdlib.h>

#include <string.h>

int main (void)

{

 struct values

 {

   char privateFIFO[14];

   int intbuff;

 }input;

 int fda;  // common FIFO to read to write to server

 int fdb;      // Private FIFO to read from server

 int clientID;

 int retbuff;

 char temp[14];

 clientID = getpid();

 strcpy(input.privateFIFO, "FIFO_");

 sprintf(temp, "%d", clientID);

 strcat(input.privateFIFO, temp);

 printf("\nFIFO name is %s", input.privateFIFO);

 // Open common FIFO to write to server

 if((fda=open("FIFO_to_server", O_WRONLY))<0)

    printf("cant open fifo to write");

 write(fda, &input, sizeof(input));    // write the struct to the server

 close(fda);

 // Open private FIFO to read

 if((fdb=open(input.privateFIFO, O_RDONLY))<0)

    read(fdb, &retbuff, sizeof(retbuff));

 printf("\nAll done\n");

 close(fdb);

}

server code:

#include <stdio.h>

#include <errno.h>

#include <fcntl.h>

#include <sys/stat.h>

#include <sys/types.h>

#include <unistd.h>

#include <stdlib.h>

#include <string.h>

struct values

 {

   char privateFIFO[14];

   int intbuff;

 }input;

int main (void)

{

 int fda;  //common FIFO to read from client

 int fdb;  //private FIFO to write to client

 int retbuff;

 int output;

// create the common FIFO  

 if ((mkfifo("FIFO_to_server",0666)<0 && errno != EEXIST))

       {

       perror("cant create FIFO_to_server");

       exit(-1);

}

// open the common FIFO

 if((fda=open("FIFO_to_server", O_RDONLY))<0)

    printf("cant open fifo to write");

output = read(fda, &input, sizeof(input));

// create the private FIFO

 if ((mkfifo(input.privateFIFO, 0666)<0 && errno != EEXIST))

 {

   perror("cant create privateFIFO_to_server");

   exit(-1);

 }

 printf("Private FIFO received from the client and sent back from server is: %d", output);

 //open private FIFO to write to client

if((fdb=open(input.privateFIFO, O_WRONLY))<0)

   printf("cant open fifo to read");

 write(fdb, &retbuff, sizeof(retbuff));

 close(fda);

 unlink("FIFO_to_server");

 close(fdb);

 unlink(input.privateFIFO);

}

Explanation:

3 0
3 years ago
Vlad is the leader of a group; he receives most of the messages from the group members, and he provides most of the information
LekaFEV [45]

Answer:

<u><em>Wheel </em></u>network

Explanation:

A wheel network <em>is a communication style in which the leader is the only one to receive or communicate.</em>

The leader, generally the business's manager or owner, is like the bright light in the middle of a Ferris wheel; the light starts in the middle and then passes on to all the spokes at the wheel's ends.

The one individual needs to understand everything about the company and to deliver all communications. Staff have a clear idea of how to make decisions and how to manage interaction.

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3 years ago
Jacob is a teacher and wants to sort his grades based on Test 1 and then on Test 2.
Pachacha [2.7K]
<span>He would click on the Test 1 column and press Sort, then click on the Test 2 column and press Sort. 
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Answer: C

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