In a Binary Expression Tree, which node represents an operator, such as addition or subtraction?a)Operator Nodeb)Root Nodec)Operand Noded)Internal Node

Step 1: Break Down the Problem

To answer the question, we need to identify which type of node in a Binary Expression Tree represents an operator (like addition or subtraction).

Step 2: Relevant Concepts

1. Binary Expression Tree: A type of binary tree used to represent expressions. Each leaf node represents operands (like numbers), and each internal node represents an operator.
2. Node Types:
   • Operator Node: This refers to nodes that carry the operators in the expression.
   • Root Node: The top-most node in the tree, which can also be an operator.
   • Operand Node: Nodes that represent the values (operands) in the expression, such as constants.
   • Internal Node: Nodes that have at least one child, which are typically the operator nodes.

Step 3: Analysis and Detail

In a Binary Expression Tree:

• Operator nodes represent operations such as +, -, *, and /.
• The root node can also be an operator if the entire expression begins with one.
• Operand nodes provide the actual values upon which the operations are performed.
• Therefore, the term "Operator Node" precisely describes nodes that represent operations.

Step 4: Verify and Summarize

From the definitions and functions of the nodes in a Binary Expression Tree, we conclude that the node that represents an operator is specifically called an "Operator Node."

Final Answer

a) Operator Node