scheduled task - cron - How many times the cron job will run when given aterisk(*) on all positions

If we define a cron job with * * * * * /some/task/to/perform, how many times the job will executed in 60 seconds?

Answer

The cron job runs every minute.

Unix cron is limited to minutes. If you want faster cronjob execution see How can I schedule a cron job that runs every 10 seconds in linux?