Assertion (A): In C arithmetic operations are pemiissible on ints, floats and chars.

Reason (R): In C every arithmetic operator must be written explicitly.

1. increases the intercept area in forward direction
2. reduces the noise picked up from other sources
3. provides a means of discriminating against undesired signals originating in directions other than in which the desired transmitter lies.

1. A file can grow or shrink dynamically.
2. A file which consists of only characters is called text file.
3. Text files may be read and written using standard Pascal READ and WRITE procedures.
4. Every file must have a beginning but may or may not have an end.