VISUAL BASIC

Detailed explanation-1: -Invalid is the data that the algorithm is not expecting the user to enter.

Detailed explanation-2: -An input validation loop is sometimes called an error handler. True. Checking for accuracy of data, even when the user provides the right type of data, is part of input validation.

Detailed explanation-3: -Desk checking is also known as hand tracing that implies the technique of testing an algorithm’s logic and input/output variables by the programmer. Desk check is performed manually by walking through every line in a pseudo-code to identify the bugs in logic and to ensure if the algorithm works as intended.

Detailed explanation-4: -Often a Boolean function can be used to validate data. Programs should be designed such that all input is inspected before it is processed and bad data is discarded.

Detailed explanation-5: -The first step that programmers follow when they solve problems is to plan the algorithm. The two most important components of any problem are the problem’s output and its input. Most algorithms begin with an instruction that enters the input items into the computer.