C Certified Entry-Level (CLE) Programmer Certification Practice Test

Typecasting in C involves converting a variable from one data type to another. This process allows programmers to explicitly specify the type they want a variable to be treated as, which can be crucial for performing specific operations or for ensuring correct data manipulation.

For example, if an integer variable needs to be treated as a floating-point number for division, typecasting enables this by converting the integer to a float temporarily during the operation. This capability is fundamental in C programming, as it provides flexibility and control over how data is handled, allowing correct mathematical and logical operations based on the intended data types.

The other options pertain to different concepts within programming: changing the memory location of a variable does not involve typecasting; creating a new variable with the same type does not relate to the conversion of data types; and duplicating a variable in a different namespace is unrelated to typecasting as it concerns variable scope rather than data type conversion.