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jek_recluse [69]
2 years ago
5

Implement A* graph search. A* takes a heuristic function as an argument. Heuristics

Computers and Technology
1 answer:
svetlana [45]2 years ago
7 0
It may be the reason
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The two extensions in scratch are correctly matched to their accessibility goals Translate extension and  Text to speech extension.

<h3>What are Scratch Extensions?</h3>

Scratch extensions are known to be used in an interface with external hardware and information outside of the Scratch website via new blocks.

Note that The two extensions in scratch are correctly matched to their accessibility goals Translate extension and  Text to speech extension.

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<h2>Question:</h2>

The remove() method in the Queue interface ________.

A. retrieves, but does not remove, the head of this queue, returning null if this queue is empty

B. retrieves and removes the head of this queue, or null if this queue is empty

 

C. retrieves, but does not remove, the head of this queue, throwing an exception if this queue is empty

D. retrieves and removes the head of this queue and throws an exception if this queue is empty

<h2>Answer:</h2>

D. retrieves and removes the head of this queue and throws an exception if this queue is empty

<h2>Explanation:</h2>

In Java, the Queue interface is found in the java.util package and inherits from the Collection interface. It is used to store elements which are processed in the order in which they are inserted. This means that the first element will be processed first.

The Queue interface has many methods. Some of them are;

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iii. poll(): retrieves and removes the element at the head of the queue. Unlike the remove() method, if the queue is empty, a <em>null </em>is returned.

iv. peek(): retrieves but does not remove the element at the head of the queue. Just like the poll() method, a <em>null</em> is returned if the queue is empty.

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