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U0. Dynamic Data Structures

Authored by Héctor L

Computers

University

12 Questions

Used 20+ times

U0. Dynamic Data Structures
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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is a feature of ArrayList in Java?

Does not allow duplicate elements.

Elements are stored in key-value pairs.

Maintains the order of elements.

Guarantees unique elements.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary use case for a HashSet?

Storing elements in a specific order.

Allowing duplicate elements.

Storing unique elements without maintaining order.

Associating values with keys.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which method is used to add an element to an ArrayList?

put()

add()

set()

insert()

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens when you try to add a duplicate key to a HashMap?

The program throws a runtime exception.

The existing value for the key is replaced with the new value.

The new key-value pair is ignored.

The program crashes.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which data structure is most suitable for managing key-value pairs in Java?

ArrayList

HashSet

HashMap

LinkedList

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Considering the code in the image, what will the output be?

0

1

2

3

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which method can be used to retrieve the value associated with a key in a HashMap?

getValue()

find()

get()

lookup()

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