How many times will a cron job run when given asterisk (*) on all positions?

Question

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

Answer 1

Once every 60 seconds i.e. every minute.

Check man 5 crontab to get more idea on this.

Answer 2

Once. It will execute exactly once every 60 seconds (except when there's a leap second added or removed).