A package is a collection ofa) classesc) editing toolsb) interfacesd) classes and interfaces

The correct answer to this question is (d) classes and interfaces.

Explanation

1. Definition of a Package: In programming, particularly in languages like Java, a package is a namespace that organizes a set of related classes and interfaces.

2. Components of a Package: A package can contain:

   • Classes: Definitions of objects and their behavior.
   • Interfaces: Abstract types that define method signatures without implementations, allowing different classes to implement them.

3. Benefits of Using Packages:

   • Organization: Helps in organizing files in a manageable way.
   • Namespace Management: Prevents naming conflicts by grouping related classes and interfaces.
   • Access Control: Provides a way to restrict access to classes and interfaces.

Therefore, since a package consists of both classes and interfaces, option (d) is the most accurate choice.