CronExpression in Sap Commerce(Hybris)

What is CronExpression 1. The technology is constantly changing day by day. Sometimes, we are required to execute a job periodically on the server. 2. Running the job on the server manually is a difficult task so, it cannot be done multiple times by the user or administrator, so we use Cron expression. 3. A Cron expression is a string or expression consisting of 6 or 7 fields (time unit) where each field separated by white space. 4. The most common cron expressions consisting of 7 fields, denoting the various unit of time, is specified below. From the 7 fields, the first 6 are mandatory, whereas, the last field ( <year> ) is optional. Fields of CronExpression: <seconds> <minutes> <hours> <day-of-month> <month> <day-of-week> <year> In Cron expressions, time unit is known as field.These are separated by white space, can contain any of the allowed values with various combinations of the allowed character...