Take a look at the link provided below IBM has provided a CM

Take a look at the link provided below. IBM has provided a CMS application development guide that we can use as a real world example of how an organization uses implicit locking. Please read this guide and describe what you have learned from it. https://www.ibm.com/support/knowledgecenter/SSB27U_6.2.0/com.ibm.zvm.v620.dmsa3/hcsd0c10154.htm

Solution

In that document they talked about Implicit locks.In ths document they said these locks are automatically acquired by the server to ensure the data integrity among multiple users. So now what is data integrity, it is a maintenance and the assurance of accuracy and consistency of data over its entire life-cycle. To allow this greatest concurrency, the server acquires locks only when needed and frees them as soon as it can. The lock duration is the length of a server unit of work, which is, for example, from the time a file is opened until it is closed and any changes are committed. Maintaining the implicit lock eliminates the need to obtain an explicit lock each time a file is updated.

Implicit locks are generally placed by the DBMS automatically. Most DBMS allow the developer or the application to issue locks which are referred to as explicit locks

This lock can be implied but not acquired

In this we have shared lock and exclusive lock

Shared ock allows multiple readers to a file where as exclusive lock specifically gives permission for only one user.