Adaface Sample TypeScript Questions

What does the following TypeScript code print?

We wrote the following TypeScript function to work as global print function. The function needs to handle string input, an array of strings as input or null as an input. In case of string and array of strings, it needs to print them to console. For null input, the code should not print anything.

The function is throwing an error when it is called with null - globalConsole(null). This is happening because typeof null is ‘object’ in JavaScript. Here are two modifications of the code to handle this case:

Pick the correct statements:
            
            A: In the case of null input, globalConsole1 won’t produce any compiler errors like globalConsole
            B: In the case of null input, globalConsole2 won’t produce any compiler errors like globalConsole
            C: globalConsole1 will differ from globalConsole for an empty string
            D: globalConsole2 will differ from globalConsole for an empty string

Consider the following TypeScript code: 

Which of the following statements are correct:
            
            A: The typescript compiler confirms that toUpperCase exists on the a instance.
            B: The typescript compiler states that the toUpperCase function does not exist on the b instance.
            C: The typescript compiler confirms that the toUpperCase function exists on the b instance.
            D: RectangleType is an array where the type of a fixed number of elements is known.
            E: Variables r, g, b are immutable.
            F: r, g, b would compile to same type signature