Question:

What sound does a duck make?

Answer:

The duck makes a quacking sound. It's a popular myth that duck quacks don't echo, but they actually do! Go AnswerParty!

More Info:

A duck call may refer to either the process by which a hunter lures waterfowl, or the actual tool which he or she uses to do so.

Duck calling is the process in which a hunter uses a tool also known as a "duck call" to emulate the sound of a duck as a means to draw them closer.

Duck Echo

In computer programming with object-oriented programming languages, duck typing is a style of typing in which an object's methods and properties determine the valid semantics, rather than its inheritance from a particular class or implementation of a specific interface. The name of the concept refers to the duck test, attributed to James Whitcomb Riley (see history below), which may be phrased as follows:

In duck typing, one is concerned with just those aspects of an object that are used, rather than with the type of the object itself. For example, in a non-duck-typed language, one can create a function that takes an object of type Duck and calls that object's walk and quack methods. In a duck-typed language, the equivalent function would take an object of any type and call that object's walk and quack methods. If the object does not have the methods that are called then the function signals a run-time error. If the object does have the methods, then they are executed no matter the type of the object, evoking the quotation and hence the name of this form of typing.

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