Practice key-value-pair Quizzes
Boost your knowledge of key-value-pair with DevBrainiac's interactive quizzes that make learning faster and more effective. Each quiz focuses on real-world concepts, helping you improve accuracy, understand fundamentals and prepare better for technical interviews. Suitable for beginners and professionals alike, our key-value-pair quizzes offer a focused, practical approach to mastering the topic.
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Learn key-value-pair step by step with interactive quizzes designed for beginners and learners revising key concepts. Build a strong foundation with clear, structured practice in key-value-pair.
Question 1
What is a key-value pair data structure primarily used for?
1
Associating a unique key with a corresponding value
2
Reducing memory consumption
3
Implementing graph algorithms
4
Storing sorted data efficiently
Question 2
Which of the following data structures is NOT a key-value pair-based data structure?
1
Priority Queue
2
HashMap
3
TreeMap
4
Redis
Question 3
Which key-value pair data structure maintains keys in a sorted order?
1
HashMap
2
TreeMap
3
HashTable
4
LinkedHashMap
Question 4
What is "load factor" in a hash table?
1
The percentage of non-empty slots in a hash table
2
The maximum number of elements allowed in a hash table
3
The ratio of occupied slots to the total capacity
4
The time taken to insert an element
Question 5
In a concurrent environment, which key-value store offers built-in thread safety?
1
ConcurrentHashMap
2
TreeMap
3
HashMap
4
HashTable
Question 6
Which key-value store is commonly used in distributed caching?
1
HashTable
2
TreeMap
3
Redis
4
LinkedList
Question 7
In a HashMap, if two keys have the same hash code, how is the collision handled?
1
The key-value pair is ignored
2
The new key-value pair is stored in the same bucket using chaining or tree structure
3
The new key-value pair replaces the old one
4
The HashMap throws an exception
Question 8
What is the primary advantage of using a key-value store over a relational database?
1
Requires less storage space
2
Better support for complex joins
3
Stronger ACID compliance
4
Fast lookup and retrieval of data
Question 9
Which key-value store is often used for real-time analytics and time-series data?
1
HashTable
2
LevelDB
3
Redis
4
RocksDB
Question 10
What is the primary disadvantage of key-value stores compared to relational databases?
1
Lack of complex query capabilities
2
Does not support distributed systems
3
Requires more memory
4
Poor performance for key lookups
Question 11
Which of the following is NOT an example of a key-value database?
1
Memcached
2
Cassandra
3
DynamoDB
4
PostgreSQL
Question 12
Which of the following is the most suitable key-value database for large-scale event logging and analytics?
1
HashTable
2
MongoDB
3
SQLite
4
Apache Cassandra
Question 13
What happens when a requested key does not exist in most key-value stores?
1
The database shuts down
2
An exception is always thrown
3
NULL or an empty response is returned
4
A default value is returned automatically
Question 14
Which data access pattern is key-value stores best optimized for?
1
Multi-table aggregation
2
Range-based queries
3
Direct lookup using a unique key
4
Complex joins across tables
Question 15
Which Redis data structure allows storing multiple field-value pairs under a single key?
1
Sorted Set
2
Set
3
Hash
4
List
Question 16
Which feature allows key-value stores like Redis to act as a cache?
1
Triggers
2
Indexing
3
TTL (Time To Live)
4
Foreign keys