Java Programming for Complete Beginners - Java 16 - Step 09 - List and ArrayList - Puzzles - Type Safety and Removing In

The video tutorial explores various aspects of lists and collections in programming, focusing on Java. It covers the creation of lists with different data types, the concept of autoboxing and wrapper classes, and the use of generics for type safety. The tutorial also delves into working with ArrayLists, including method overloading and removing elements. The aim is to provide a deeper understanding of these concepts through practical examples and puzzles.

What happens when you try to store a primitive type in a Java list?

• It is converted to a string.

• It is stored as a primitive type.

• It cannot be stored in a list.

• It is automatically converted to its corresponding wrapper class.

What is the default wrapper class for a floating-point constant in a list?

• Float

• Double

• Integer

• Character

What is the purpose of using generics in Java lists?

• To increase the speed of list operations.

• To allow any type of data to be stored.

• To automatically sort the list.

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

How can you ensure that a list only contains string values?

• By using a list of type Object.

• By using a list of type String.

• By using a list of type Character.

• By using a list of type Integer.

What will the indexOf method return if the element is not found in the list?

• Zero.

• A negative number.

• The index of the first element.

• The index of the last element.

Why does the remove method throw an IndexOutOfBoundsException when trying to remove an element by value?

• Because the method is overloaded and interprets the value as an index.

• Because the element is not in the list.

• Because the element is a primitive type.

• Because the list is empty.

Which method is more efficient for creating an Integer object?

• Integer.valueOf()

• new Integer()

• Integer.toString()

• Integer.parseInt()