Big Data Technologies and NoSQL Databases MCQs

What is Big Data? A) Data that is small in size but complex in structure B) Data that can be processed using traditional relational databases C) Extremely large datasets that may be analyzed computationally to reveal patterns, trends, and associations D) Data that is secure and encrypted Answer: C Which of the following is not a characteristic of Big Data? A) Volume B) Velocity C) Value D) Variety Answer: C What is the primary challenge associated with Big Data processing? A) Data security B) Data integration C) Data visualization D) Data scalability Answer: D Which technology is commonly used for storing and processing Big Data in distributed environments? A) SQL databases B) NoSQL databases C) Relational databases D) Data warehouses Answer: B Which of the following is an example of NoSQL database? A) MySQL B) PostgreSQL C) MongoDB D) Oracle Answer: C What does ACID stand for in the context of database transactions? A) Atomicity, Consistency, Isolation, Durability B) Aggregation, Clustering, Indexing, Distribution C) Authentication, Authorization, Encryption, Decryption D) Accuracy, Completeness, Integrity, Dependency Answer: A Which type of NoSQL database is optimized for handling key-value pairs? A) Document store B) Column-family store C) Graph database D) Key-value store Answer: D What is sharding in the context of NoSQL databases? A) Encrypting data for secure storage B) Splitting a database horizontally across multiple servers C) Querying data using graph-based algorithms D) Optimizing query performance Answer: B Which of the following is a characteristic of column-family stores in NoSQL databases? A) Flexible schema B) High availability C) Strong consistency D) Optimized for transactional processing Answer: A What is the CAP theorem in distributed systems? A) A theorem describing data compression techniques B) A theorem describing the trade-offs between Consistency, Availability, and Partition tolerance C) A theorem describing data encryption standards D) A theorem describing query optimization techniques Answer: B Which of the following NoSQL databases is known for its high availability and partition tolerance at the expense of consistency during network partitions? A) MongoDB B) Cassandra C) Redis D) CouchDB Answer: B What is the primary advantage of using a document store NoSQL database? A) Strong consistency B) Schema flexibility C) High performance for complex queries D) Efficient storage of columnar data Answer: B Which of the following NoSQL databases is best suited for handling hierarchical data structures and complex relationships? A) Redis B) Cassandra C) Neo4j D) HBase Answer: C What is MapReduce used for in Big Data processing? A) Real-time data processing B) Data replication C) Distributed data processing and computation D) Data encryption Answer: C Which of the following is a characteristic of Hadoop Distributed File System (HDFS)? A) Designed primarily for storing structured data B) Optimized for real-time transaction processing C) Fault-tolerant storage system for Big Data D) Strong consistency model Answer: C What role does Apache Spark play in Big Data processing? A) Real-time data streaming B) In-memory data processing and analytics C) Batch processing of structured data D) Key-value storage management Answer: B Which of the following is a characteristic of Cassandra NoSQL database? A) Strong consistency B) Schema flexibility C) ACID transactions D) Document-oriented storage Answer: B What is the primary advantage of using column-family stores in Big Data environments? A) High availability B) Flexible schema design C) Strong consistency D) Optimized for real-time queries Answer: A Which of the following is a feature of graph databases like Neo4j? A) High availability B) ACID transactions C) Optimized for key-value storage D) Efficient handling of complex relationships Answer: D What is the primary use case for Redis NoSQL database? A) Document storage B) Caching and real-time analytics C) Distributed file storage D) Columnar data storage Answer: B Which of the following is a characteristic of MongoDB NoSQL database? A) Schema enforcement B) Strong consistency C) SQL-based querying language D) Flexible document schema Answer: D What does BASE stand for in the context of NoSQL databases? A) Basic Availability, Simple Exchange B) Basic Atomicity, Strong Consistency C) Basically Available, Soft-state, Eventually Consistent D) Basic Authorization, Secure Encryption Answer: C Which of the following is a characteristic of Riak NoSQL database? A) ACID transactions B) Schema flexibility C) Optimized for document storage D) Eventually consistent model Answer: D What is the primary advantage of using DynamoDB NoSQL database? A) Strong consistency B) Flexible schema design C) High availability and low latency D) Optimized for complex queries Answer: C Which of the following is a disadvantage of using NoSQL databases? A) Scalability B) Flexible schema design C) ACID transactions D) Limited query capabilities Answer: D What is the purpose of HBase NoSQL database? A) Real-time analytics B) Document storage C) Distributed key-value store D) In-memory data processing Answer: C Which of the following is a characteristic of Amazon DynamoDB? A) Strong consistency B) Schema enforcement C) Optimized for real-time analytics D) Document-oriented storage Answer: A What is the primary advantage of using Apache Cassandra NoSQL database? A) ACID transactions B) High availability and scalability C) Strong consistency model D) Optimized for complex joins Answer: B Which of the following is a feature of Couchbase NoSQL database? A) Columnar storage B) ACID transactions C) Optimized for real-time queries D) Memory-first architecture Answer: D What is the role of Hadoop in Big Data ecosystems? A) Real-time data streaming B) Batch processing and distributed storage C) In-memory data processing D) Key-value pair management Answer: BWhat is the primary advantage of using Apache Hadoop in Big Data processing? A) Real-time data analytics B) In-memory processing C) Fault tolerance and scalability D) Schema enforcement Answer: C Which of the following is a characteristic of Apache Spark? A) Disk-based storage B) Batch processing only C) In-memory data processing D) Strong consistency model Answer: C What is the role of Zookeeper in Hadoop ecosystems? A) Data encryption B) Cluster coordination and management C) Query optimization D) Real-time analytics Answer: B Which of the following NoSQL databases is optimized for storing and retrieving JSON documents? A) CouchDB B) Cassandra C) Couchbase D) MongoDB Answer: D What is the primary advantage of using MongoDB as a document-oriented NoSQL database? A) ACID transactions B) Schema flexibility C) Strong consistency D) Columnar storage Answer: B Which of the following is a characteristic of CouchDB NoSQL database? A) Strong consistency B) Optimized for real-time analytics C) Schema enforcement D) Multi-master replication Answer: D What is the primary use case for Redis NoSQL database? A) Document storage B) Caching and real-time analytics C) Distributed file storage D) Columnar data storage Answer: B Which NoSQL database is best suited for handling large amounts of time-series data? A) Cassandra B) MongoDB C) InfluxDB D) HBase Answer: C What is the primary advantage of using Cassandra NoSQL database? A) Schema enforcement B) High availability and scalability C) ACID transactions D) Strong consistency model Answer: B Which of the following is a characteristic of HBase NoSQL database? A) Strong consistency B) Schema flexibility C) Optimized for document storage D) Column-oriented storage Answer: D What is the primary advantage of using Amazon DynamoDB NoSQL database? A) Strong consistency B) Flexible schema design C) High availability and low latency D) Optimized for complex queries Answer: C Which of the following is a feature of Neo4j graph database? A) Columnar storage B) Schema enforcement C) Optimized for handling complex relationships D) ACID transactions Answer: C What does BASE stand for in the context of NoSQL databases? A) Basically Available, Simple Exchange B) Basic Atomicity, Strong Consistency C) Basically Available, Soft-state, Eventually Consistent D) Basic Authorization, Secure Encryption Answer: C Which of the following NoSQL databases is known for its distributed nature and high availability? A) CouchDB B) Riak C) MongoDB D) Redis Answer: B What is the primary advantage of using Riak NoSQL database? A) Strong consistency B) Schema flexibility C) Optimized for real-time analytics D) Eventually consistent model Answer: D Which NoSQL database is known for its efficient handling of large-scale distributed data? A) Redis B) Couchbase C) Cassandra D) MongoDB Answer: C What is the purpose of Apache Kafka in Big Data architectures? A) Real-time data processing B) Document storage C) In-memory data analytics D) Multi-master replication Answer: A Which of the following is a feature of Couchbase NoSQL database? A) Columnar storage B) ACID transactions C) Optimized for real-time queries D) Memory-first architecture Answer: D What is the primary role of Apache HBase in Big Data ecosystems? A) Real-time analytics B) Document storage C) Distributed key-value store D) In-memory data processing Answer: C Which of the following is a characteristic of Amazon Aurora NoSQL database? A) Strong consistency B) Schema enforcement C) Optimized for real-time analytics D) Document-oriented storage Answer: A