Clearcase allows to write on the element which is check-out mode
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True
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False
ClearCase allows writing to elements that are checked out. This is the fundamental purpose of checkout in version control - to obtain a writable copy for modification. When you check out an element, you gain the ability to make changes, and those changes are tracked until you check the element back in.
True is correct. In Rational ClearCase (a version-control/SCM tool), you must explicitly 'check out' a versioned element before you can modify it — checkout locks/reserves the element (in reserved mode) or at least marks it as being worked on (in unreserved mode) and makes the file writable in your view. Once checked out, the element is editable; you then check it in to create a new version. This checkout-before-write model is the core mechanism ClearCase uses to track and control concurrent changes, so the statement is true.