The following statements is true EXCEPT_______________.

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The question asks to identify the statement that is false (the EXCEPT).
Option 1: 'A program is executable without having any variable.' In many programming scenarios, a simple program can run without declaring or using any variables (for example, printing a constant or performing constant-only calculations). Therefore this statement can be true in certain languages and contexts.
Option 2: 'Casting is a process of changing data type for the specific line of code.' This is a correct description of casting: converting a value from one data type to another, typically tied to a particular operation or line of code where the conversion is necessary.
Option 3: 'Variable declaration not necessarily to have a data type.' This statement claims that declaring a variable does not require a data type. In many statically-typed languages (like Java, C, C++), a variable declaration must include a data type. Even in languages with type inference, there is still an implied type, and the declaration typically involves typing in some form. Hence, as a general rule, this statement is not accurate across common languages and is the false one in this set.
Option 4: 'Input provided from a textbox is string data type by default.' Often, input from a textbox is treated as a string by default and may later be parsed or converted to other types as needed. This is a typical behavior in many high-level languages and frameworks, making the statement generally true.
Overall, the only statement that does not align with common language rules about variable declarations is option 3, making it the EXCEPT statement in this question.

Introduction To Object Oriented Programming (CT044-3-1-IOOP-25-RESIT)

The following statements is true EXCEPT_______________.

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