________ refers to an empty cell

A) Count

B) Zero

C) Null

D) Circular reference

C

Computer Science & Information Technology

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Here is a JUnit method Anna used to test removing the root. It kept reporting failure, but Anna could see nothing wrong with remove()’s implementation. After a frustrating hour of trying to solve the problem, Anna was floored when Opal walked by and pointed immediately to the mistake. What did Opal see?

``` public void testRemoveRoot(){ BinaryTreeNode root = tree3.root(); integer target = root.element(); // remove target from tree3 and the list of elements // we expect to see in tree3 expectedTree3List.remove( target ); tree3.remove( root ); assertTrue( !tree3.contains( target ) ); ToListVisitor treeVisitor = new ToListVisitor(); tree3.preOrderTraversal( treeVisitor ); assertTrue( expectedTree3List.equals( treeVisitor.list() ) ); } ```

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Computer Science & Information Technology

On a PC, file extensions are linked to programs

Indicate whether the statement is true or false

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Computer Science & Information Technology

What is the default After spacing settings in the Normal template?

A) 0 points B) 4 point C) 8 point D) Auto

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Computer Science & Information Technology

A(n) ________ is an equation that produces results such as numbers or text

Fill in the blank(s) with correct word

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Computer Science & Information Technology