Which of the following are themselves a collection of different data types?all of the mentionedstructuresstringchar

The question asks which of the following options can be a collection of different data types. Let’s analyze each option given:

1. Structures: In programming, particularly in languages like C and C++, a structure (struct) is a user-defined data type that allows the grouping of different types of data under a single name. Hence, structures can hold various data types.

2. String: Generally, a string is an array of characters. In most programming contexts, strings themselves are not typically considered to hold different data types, but rather, they store sequences of characters. So, in a strict sense, strings cannot be classified as collections of different data types.

3. Char: The char data type typically represents a single character and does not encapsulate a collection of different data types. It is a primitive data type.

4. All of the mentioned: Since only structures qualify as collections of different data types, this option is misleading.

Conclusion

The correct answer here is Structures since they can contain multiple data types. The other options do not fit the criteria of being a collection of different data types.