Questions

This is a common error while compiling C program in Linux. This error occurs when you are using pthread_create function to create threads in your programs.

To fix this problem ensure following points:
Include header file pthread.h in your program.
Add –lpthread linker flag with compilation command.
1- Include Header file
#include <stdio.h>
#include <pthread.h>
...
...
2- Compile command
gcc main.c -o main -lpthread

Applicant should answer that being in a wholesale market, he/she would plan and direct advertising and promotional activities to attract more retailer suppliers. Promotional activities like posters, contests, coupons, give-away to create extra interest in the purchase of a product or services from customers or retailers.

SiCl4 is a non polar as the forces of attraction between the shared pair of electrons are equal and the molecule is symmetric.

Oenology is the science and study of wine and winemaking. So person who is specialist in that is called as Oenologist.