The correct answer is: C. a checksum digit is used for detecting Errors in data transmission
A checksum digit is a digit that is used to verify the accuracy of a data transmission. It is calculated by adding up the values of all the digits in the data and then dividing the sum by a predetermined number. The remainder of this division is the checksum digit. If the checksum digit is not correct, then it indicates that there has been an error in the data transmission.
A hierarchical data structure is a data structure that is organized in a tree-like fashion. The data elements are arranged in a hierarchy, with each element having one or more child elements. This type of data structure is often used to represent data that has a natural hierarchical structure, such as a family tree or a company organization chart.
Pointers are variables that store the address of another variable. They are often used to traverse linked lists. A linked list is a data structure that consists of a series of nodes, each of which contains a data element and a pointer to the next node in the list. To traverse a linked list, you start at the first node and follow the pointer to the next node until you reach the end of the list.
Therefore, the statement “a checksum digit is used for detecting Errors in data transmission” is not true.