MCQs

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Overall MCQs for Reference

Which of the following is NOT a type of NoSQL database?
a. Document Store
b. Relational Database
c. Key-Value Store
d. Column-Family Store
Answer: b. Relational Databasevtricks
Non-relational databases are also called:
a. SQL databases
b. RDBMS
c. NoSQL databases
d. Flat file databases
Answer: c. NoSQL databasestestbook+1
Which of these is a non-relational database?
a. MySQL
b. Oracle
c. MongoDB
d. SQL Server
Answer: c. MongoDBgeeksforgeeks+1
What is the primary benefit of non-relational databases?
a. Fixed schema
b. Transaction consistency
c. Flexible data model
d. Mandatory relations
Answer: c. Flexible data modelgeeksforgeeks+1
Which data type is non-relational databases best suited for?
a. Structured only
b. Semi-structured and unstructured
c. Binary only
d. Numeric only
Answer: b. Semi-structured and unstructuredgeeksforgeeks+1
The data model used by document stores is typically:
a. XML
b. Tabular
c. JSON or BSON
d. INI
Answer: c. JSON or BSONbuiltin+1
An example of a graph database is:
a. HBase
b. Neo4j
c. MySQL
d. Oracle
Answer: b. Neo4jaltexsoft+1
Non-relational databases do not require:
a. Indexing
b. Predefined schema
c. Security
d. Storage
Answer: b. Predefined schemainstitutedata+1
A key-value store stores data in which form?
a. Rows and columns
b. Keys and values
c. Documents
d. Trees
Answer: b. Keys and valuesgeeksforgeeks+1
Which NoSQL database is known for caching and fast operations?
a. MongoDB
b. Redis
c. Oracle
d. PostgreSQL
Answer: b. Redisgeeksforgeeks
Which of these tasks is better handled by a wide-column store?
a. Simple lookups
b. Social graphs
c. Large-scale analytics
d. Text searching
Answer: c. Large-scale analyticsaltexsoft+1
Which database system is an example of a document-oriented NoSQL database?
a. MongoDB
b. Neo4j
c. Cassandra
d. HBase
Answer: a. MongoDBaltexsoft+1
Column-oriented NoSQL databases store data as:
a. Key-Value pairs
b. Documents
c. Columns
d. XML files
Answer: c. Columnsgeeksforgeeks+1
Non-relational databases are primarily _____ in design.
a. Rigid
b. Schema-less
c. Hierarchical
d. Flat-file
Answer: b. Schema-lessinstitutedata+1
Which non-relational database is suitable for relationship-based queries?
a. SQL Server
b. Neo4j
c. MongoDB
d. Cassandra
Answer: b. Neo4jgeeksforgeeks+1
What is one advantage of non-relational databases in cloud environments?
a. No replication
b. Cost efficiency
c. Single server
d. Strong consistency
Answer: b. Cost efficiencylearn.microsoft+1
Which of the following statements is true regarding NoSQL data models?
a. Only key-value model exists
b. Only relational models exist
c. Multiple models like key-value, document, graph, columnar
d. Only hierarchical model exists
Answer: c. Multiple models like key-value, document, graph, columnarbuiltin+1
Which non-relational database excels at storing session information?
a. HBase
b. Redis
c. MySQL
d. IBM DB2
Answer: b. Redisgeeksforgeeks
Non-relational databases are best used when data is:
a. Highly structured
b. Uniform and tabular
c. Unpredictable or evolving
d. Only numeric
Answer: c. Unpredictable or evolvingaws.amazon+1
Document databases can naturally store:
a. Only numbers
b. Nested objects and arrays
c. Binary trees
d. Single integers
Answer: b. Nested objects and arraysbuiltin+1
Which NoSQL type organizes data into nodes and relationships?
a. Key-Value
b. Document
c. Graph
d. Column-Family
Answer: c. Graphbuiltin+1
What is a typical use case for wide-column NoSQL databases?
a. Transactional banking
b. Time-series data
c. Storing images
d. Simple key-value storage
Answer: b. Time-series datageeksforgeeks
The main scalability feature of non-relational databases is:
a. Vertical scaling
b. Horizontal scaling
c. Single server scaling
d. Batch scaling
Answer: b. Horizontal scalinginstitutedata+1
What format do document stores like MongoDB often use?
a. INI
b. CSV
c. JSON
d. YAML
Answer: c. JSONgeeksforgeeks
Which factor is not a benefit of non-relational databases?
a. Flexibility
b. High scalability
c. Strict schema
d. Performance
Answer: c. Strict schemainstitutedata+1
Non-relational databases are preferred for:
a. Transaction-level consistency
b. Handling massive, diverse data
c. Rigid, normalized tables
d. Enforcing foreign key dependencies
Answer: b. Handling massive, diverse datainstaclustr+1
Which is not a type of NoSQL database model?
a. Key-value
b. Document
c. Object-relational
d. Graph
Answer: c. Object-relationalaltexsoft+1
A key drawback of non-relational databases can be:
a. Poor scalability
b. No support for large data
c. Limited transaction capabilities
d. Only works with structured data
Answer: c. Limited transaction capabilitiesaws.amazon+1
In a key-value store, a “key”:
a. Can be duplicated
b. Must be unique
c. Is always numeric
d. Is optional
Answer: b. Must be uniquegeeksforgeeks
Which database is known for its open-source document-store architecture?
a. Redis
b. Cassandra
c. MongoDB
d. HBase
Answer: c. MongoDBaltexsoft+1
Which feature is more prominent in non-relational databases than relational ones?
a. Table joins
b. Flexible schema
c. Predefined relationships
d. Aggregate functions
Answer: b. Flexible schemainstitutedata+1
Which of these is NOT an example of a key-value database?
a. Redis
b. Amazon DynamoDB
c. Apache Cassandra
d. Berkeley DB
Answer: c. Apache Cassandrainstaclustr+1
Which NoSQL architecture is suitable for fraud detection and recommendation systems?
a. Graph
b. Document
c. Key-Value
d. Column-Family
Answer: a. Graphinstaclustr+1
Document stores are ideal for which kind of application?
a. Content management systems
b. Math calculations
c. Arithmetic operations only
d. Indexing user IDs
Answer: a. Content management systemsgeeksforgeeks
Apache Cassandra belongs to which category?
a. Document store
b. Key-value
c. Wide-column
d. Graph database
Answer: c. Wide-columnaltexsoft+1
NoSQL databases were created to address the limitations of:
a. XML flat files
b. Relational databases for large, distributed data
c. Programming languages
d. Hard disk speeds
Answer: b. Relational databases for large, distributed datainstitutedata+1
Which NoSQL database is famous for high-availability and distributed architecture?
a. MySQL
b. PostgreSQL
c. Apache Cassandra
d. Oracle
Answer: c. Apache Cassandrageeksforgeeks
Which scenario is best suited for using non-relational data storage?
a. Fixed format financial records
b. Rapidly changing user preferences and session data
c. Payroll data
d. Statistical time series
Answer: b. Rapidly changing user preferences and session datainstitutedata+1
The primary mechanism for scaling NoSQL databases is:
a. Indexing
b. Horizontal partitioning (sharding)
c. Transaction locking
d. Serial connection
Answer: b. Horizontal partitioning (sharding)instaclustr+1
Couchbase is an example of:
a. Key-value and document store
b. Only key-value store
c. Relational DB
d. Columnar store
Answer: a. Key-value and document storealtexsoft+1
Which characteristic allows non-relational databases to handle diverse datasets?
a. ACID properties
b. Dynamic and flexible schemas
c. Strict relationships
d. Normalization
Answer: b. Dynamic and flexible schemasinstitutedata+1
Which option is true for NoSQL databases?
a. They use tabular data exclusively
b. They only support XML
c. They provide multiple data models
d. They prohibit distributed storage
Answer: c. They provide multiple data modelsinstaclustr+1
Which feature of NoSQL databases supports disaster recovery and business continuity?
a. Built-in replication
b. Manual data entry
c. Single-site storage
d. Flat files
Answer: a. Built-in replicationinstitutedata+1
Which statement about non-relational databases is FALSE?
a. They require a rigid schema
b. They are suitable for handling unstructured data
c. They generally scale horizontally
d. They often provide high availability
Answer: a. They require a rigid schemaaws.amazon+1
Which database is primarily used for high-speed transaction processing?
a. Redis
b. Neo4j
c. Oracle
d. SQL Server
Answer: a. Redisgeeksforgeeks
Wide-column stores arrange data by:
a. Relationships
b. Keys only
c. Columns and rows with flexible columns
d. JSON arrays
Answer: c. Columns and rows with flexible columnsinstaclustr+1
Graph databases use which two components?
a. Keys and values
b. Edges and nodes
c. Columns and rows
d. Pages and indexes
Answer: b. Edges and nodesbuiltin+1
Which of the following is an advantage of NoSQL databases over traditional RDBMS?
a. Complex joins
b. High availability at massive scale
c. Row-level locking
d. Fixed table structures
Answer: b. High availability at massive scaleinstitutedata+1
HBase is best described as what type of database?
a. Document store
b. Column-family store
c. Key-value store
d. Graph store
Answer: b. Column-family storealtexsoft+1
Which use case best justifies the use of a non-relational database?
a. Calculating monthly payroll
b. Managing e-commerce product catalogs with varied attributes
c. Standardized medical records
d. Banking ledger with controlled transactions
Answer: b. Managing e-commerce product catalogs with varied attributesinstaclustr+1

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