Mena Sargios
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Algorithms and Data Structures | Test 3 Review | CSCI-3110-002 MTSU

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Mena Sargios
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4. 2-3-4 Tree

Question 1 of 18

1

What are the internal node stipulations in a 2-3-4 tree?

Select one of the following:

  • If the internal node has one data item in it, then it only has two children
    if the internal node has two data items in it, then it has three children
    if the internal node has three data items in it, then it has four children

  • none of the above

Explanation

Question 2 of 18

1

An internal node in a 2-3-4 tree is said to be a _ node if it has
_ data elements.

Select one of the following:

  • A) 2, 2

  • B) 3, 2

  • C) 3, 4

  • D) 4, 4

Explanation

Question 3 of 18

1

What makes a 2-3-4 tree seperate from a binary tree?

Select one of the following:

  • Each node can have up to three elements and four children.

  • none of the above

Explanation

Question 4 of 18

1

What does the 2,3,4 in a 2-3-4 tree mean

Select one of the following:

  • A.how many links to child nodes can potentially be contained in a given node

  • B.how many searches must be done find element of the tree

  • C.none of the above

  • D.A and B

Explanation

Question 5 of 18

1

What are 2-3-4 tree's commonly used to implement?

Select one of the following:

  • Dictionaries

  • none of the above

Explanation

Question 6 of 18

1

a 2–3–4 tree is a self-balancing data structure that is commonly used to implement dictionaries.

Select one of the following:

  • True
  • False

Explanation

Question 7 of 18

1

in a 2-3-4 tree a node can have up to 4 children?

Select one of the following:

  • True
  • False

Explanation

Question 8 of 18

1

Which of the following is true of 2-3-4 trees?

Select one of the following:

  • a. a 2-node has TWO data elements and TWO child nodes.

  • b. a 3-node has TWO data elements and THREE child nodes.

  • c. a 4-node has THREE data elements and THREE child nodes.

  • d. None are true!

Explanation

Question 9 of 18

1

What is the maximum number of children in a 2-3-4 tree?

Select one of the following:

  • A) There is no maximum

  • B) 9

  • C) 2

  • D) 4

Explanation

Question 10 of 18

1

A tree where every node with children has either 2, 3, or 4 children:

Select one of the following:

  • 2-3-4 tree

  • none of the above

Explanation

Question 11 of 18

1

A 2-3-4 tree is a tree where every node with children has ________ child nodes.

Select one of the following:

  • A. 2 3 or 4

  • B. 1 2 or 3

  • C. 4 5 or 6

  • D. 2 4 or 6

Explanation

Question 12 of 18

1

What is one proerty of 2-3-4 trees?

Select one of the following:

  • A) All external nodes are at the same depth

  • B) The trees have height 2, 3, or 4

  • C) They are A-Trees

  • D) None

Explanation

Question 13 of 18

1

Which of the following is a characteristic of a 2-3-4 tree?

Select one of the following:

  • A. all leaves are on the same level

  • B. each node has 2 keys with 3 children, and every tree is log 4 for searching

  • C. has 3 or 4 keys per node

  • D. each node can have any number of children, but only 2, 3, or 4 keys per node

Explanation

Question 14 of 18

1

What are the properties of a 2-3-4 tree?

Select one of the following:

  • A. Every node (leaf or internal) is a 2-node, 3-node or a 4-node, and holds one, two, or three data elements, respectively.

  • B. All leaves are at the same depth (the bottom level).

  • C. All data is kept in sorted order.

  • D. All of the above

Explanation

Question 15 of 18

1

2-3-4 trees are an isometry of red-black trees.

Select one of the following:

  • True
  • False

Explanation

Question 16 of 18

1

In computer science, a 2–3–4 tree (also called a 2–4 tree) is a self-balancing data structure that is commonly used to implement dictionaries.
which is not correct the following properties of 2-3-4 tree?

Select one of the following:

  • a. Every node (leaf or internal) is a 2-node, 3-node or a 4-node, and holds one, two, or three data elements, respectively.

  • b. All leaves are at the same depth (the bottom level).

  • c. All data is kept in sorted order.

  • d. All data is not kept in any certain sorted order.

Explanation

Question 17 of 18

1

which one is not right about the 2_3_4 tree?

Select one of the following:

  • A. one node in a 2_3_4 tree must has 4 child nodes.

  • B. In the average case, the time complexity of searching one member of the 2_3_4 tree is O(logn).

  • C. In the average case, the time complexity of inserting one member into the 2_3_4 tree is O(logn).

  • D. 2–3–4 trees are B-trees of order 4.

Explanation

Question 18 of 18

1

In big O notation, what is the worst case time complexity for inserting a node into a 2-3-4 tree?

Select one of the following:

  • A) O(Log(N+1))

  • B) O(Log(N-1))

  • C) O(Log(N/2))

  • D) O(Log(N))

Explanation