Data St.

What is a two-dimensional list in Python commonly referred to as?

• Array
• Matrix
• Set
• Dictionary

Which of the following best describes how elements in a two-dimensional list are organized?

• In a hierarchical structure
• In rows and columns
• In a circular format
• In a linear sequence

How can you access an element in a two-dimensional list?

• Using a single index
• Using a string key
• Using two indices
• Using a loop

What does the first index represent when accessing elements in a two-dimensional list?

• Column
• Row
• Data type
• Value

Which of the following statements about modifying elements in a two-dimensional list is true?

• Elements cannot be modified
• You must specify both row and column indices
• You can modify elements using a single index
• You can only modify the first row

What is the primary method for iterating over a two-dimensional list?

• Using recursion
• Using a single loop
• Using list comprehensions
• Using nested loops

How does a general tree differ from a binary tree?

• A general tree must be balanced.
• A binary tree has no root node.
• A binary tree can have nodes with an arbitrary number of children.
• A general tree can have nodes with more than two children.

Which of the following is true about the root of a tree?

• It must have at least one child.
• It is the topmost node.
• It can have no children.
• It is the bottommost node.

What is the height of a tree?

• The number of children of the root node.
• The number of nodes in the tree.
• The length of the longest path from the root to a leaf node.
• The total number of levels in the tree.

What is the defining characteristic of a binary tree?

• Each node can have an arbitrary number of children.
• Each node has at most two children.
• Every node must have exactly two children.
• All nodes must be leaf nodes.