Data Structures Challenge Quiz: Arrays, Lists, and Hashmaps Quiz

1. Tracking User Logins

   Which data structure would best store a fixed daily record of the number of user logins for each day of the month?

   1. Array
   2. Linkedist
   3. Hasmap
   4. Queues
   5. Stack

2. Retrieving User Preferences

   You need to quickly retrieve a user's application settings using their username. Which data structure is the most suitable for this case?

   1. Hashmap
   2. Array
   3. Linst
   4. Queu
   5. Tree

3. Dynamic Shopping Cart

   If users can add or remove items dynamically to their shopping cart, and the cart size changes frequently, which data structure is most appropriate?

   1. List
   2. Arry
   3. Stackk
   4. Treee
   5. Hashmapp

4. Implementing a Simple Cache

   For a caching feature that stores and quickly retrieves pages using their URL as a key, which data structure is ideal?

   1. Hashmap
   2. Array
   3. Linkedst
   4. Que
   5. Liszt

5. Inserting at the Beginning

   Consider you want to frequently insert elements at the beginning of a data structure. Which one is more efficient for this?

   1. Linked List
   2. Arrray
   3. Stack
   4. Hashmpa
   5. Tree

6. Finding Unique Email Addresses

   Given a list of user email addresses, which data structure would you use to quickly check if an email was already seen (assuming no duplicates are allowed)?

   1. Hashmap
   2. Array
   3. Stcak
   4. Lis
   5. Queue

7. Efficient Read by Index

   You want to access the third item in a collection in constant time. Which data structure should you choose?

   1. Array
   2. Hahsmap
   3. Linked Lsit
   4. Qeuue
   5. Heash

8. Maintaining Order While Adding

   Which data structure preserves the order of elements as they are appended, allowing for fast iteration from first to last?

   1. List
   2. Hashmapp
   3. Tree
   4. Ary
   5. Stak

9. Key-Value Pair Storage

   When storing and retrieving values using unique keys, which data structure offers the best performance for average-case lookups?

   1. Hashmap
   2. Array
   3. Stack
   4. Linkedlst
   5. Trree

10. Replacing Oldest in a Limited Collection

    A log file keeps only the last ten application messages. Which data structure would make it easy to replace the oldest message when a new one arrives?

    1. Array
    2. Hashamp
    3. Lis
    4. Queue
    5. Stack