Learn Java from Scratch - A Beginner's Guide - Step 09 - List and ArrayList - Puzzles - Type Safety and Removing Integer

The video tutorial explores various aspects of lists in programming, including creating lists with mixed data types, understanding auto boxing and wrapper classes, and using generics to restrict data types. It also covers working with ArrayLists, modifying them, and handling exceptions. The tutorial aims to deepen understanding of lists through practical examples and puzzles.

What happens when you try to access the second element of a list containing mixed data types?

• It returns the element as a string.

• It returns the element as an integer.

• It throws an error.

• It returns the element as a character.

What is the role of auto-boxing in Java lists?

• It allows primitive types to be stored as objects.

• It converts objects to strings.

• It automatically sorts the list.

• It prevents primitive types from being stored.

Which wrapper class is used for a character in a list?

• String

• Character

• Integer

• Double

How do generics help in managing lists in Java?

• They increase the list's capacity.

• They automatically convert data types.

• They restrict the list to store only specific types of data.

• They allow any type of data to be stored.

What happens if you try to store a double in a list of strings?

• It gets stored as a double.

• It throws a compile-time error.

• It gets ignored.

• It gets converted to a string.

What is the result of calling indexOf on a list with the element 101?

• It returns null.

• It throws an exception.

• It returns the index of the element.

• It returns -1.

Why does calling remove(101) on a list sometimes result in an IndexOutOfBoundsException?

• Because 101 is not in the list.

• Because remove expects an index, not a value.

• Because 101 is a primitive type.

• Because the list is empty.