MCQs

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Overall MCQs for Reference

Which component of Hadoop is responsible for distributed data storage?
a. MapReduce
b. Hive
c. HDFS
d. Pig
Answer: c. HDFSplacementpreparation
What programming model does Hadoop use for processing large data sets?
a. Master-Slave
b. MapReduce
c. Replication
d. YARN
Answer: b. MapReducescribd
Hadoop can process which types of data?
a. Structured only
b. Unstructured only
c. Semi-structured only
d. All of the above
Answer: d. All of the aboveplacementpreparation
In Hadoop, what is the function of a DataNode?
a. Stores data blocks
b. Processes metadata
c. Manages cluster resources
d. Coordinates tasks
Answer: a. Stores data blocksplacementpreparation
Which mechanism does Hadoop use to ensure data is not lost in case of a node failure?
a. Data mirroring
b. Data partitioning
c. Data replication
d. Data encryption
Answer: c. Data replicationplacementpreparation
What is the default block size in HDFS (Hadoop Distributed File System)?
a. 32 MB
b. 64 MB
c. 128 MB
d. 256 MB
Answer: c. 128 MBscribd
Which is NOT a core component of Hadoop?
a. HDFS
b. Pig
c. YARN
d. MapReduce
Answer: b. Pigscribd
Which programming language is Hadoop primarily written in?
a. Python
b. Java
c. Scala
d. C++
Answer: b. Javatestbook
Hadoop is best used for:
a. Low-latency online transactions
b. Large-scale batch processing
c. Real-time analytics
d. Web hosting
Answer: b. Large-scale batch processingplacementpreparation
How does HDFS handle very large files?
a. Compresses them
b. Stores on a single node
c. Breaks into smaller blocks
d. Duplicates
Answer: c. Breaks into smaller blocksplacementpreparation
What is the primary function of the Hadoop NameNode?
a. Stores user data
b. Manages the file system metadata
c. Handles MapReduce tasks
d. Balances data nodes
Answer: b. Manages the file system metadatatestbook
Which Hadoop component is responsible for resource management?
a. MapReduce
b. YARN
c. Pig
d. HBase
Answer: b. YARNtestbook
Which tool is used to import/export data from RDBMS to Hadoop?
a. Hive
b. Flume
c. Oozie
d. Sqoop
Answer: d. Sqoopscribd
What file system does Hadoop use?
a. Centralized
b. Distributed
c. Standalone
d. Fragmented
Answer: b. Distributedplacementpreparation
For what is Apache Hive used in Hadoop?
a. Stream processing
b. Data warehousing and SQL queries
c. Real-time analytics
d. Data replication
Answer: b. Data warehousing and SQL queriesscribd
Which daemon is responsible for the submission and distribution of MapReduce jobs?
a. DataNode
b. NameNode
c. ResourceManager
d. NodeManager
Answer: c. ResourceManagerscribd
What is a Reducer in Hadoop?
a. Executes final computations
b. Assigns jobs
c. Stores metadata
d. Imports data
Answer: a. Executes final computationsplacementpreparation
Hadoop is highly suitable for which characteristic of data?
a. Small volumes
b. High velocity
c. Large volumes
d. Categorical only
Answer: c. Large volumesplacementpreparation
HDFS is optimized for which type of data access?
a. Random access
b. Sequential read
c. Real-time access
d. Transactional access
Answer: b. Sequential readplacementpreparation
Which component in Hadoop handles job scheduling and monitoring?
a. DataNode
b. ResourceManager
c. TaskTracker
d. NameNode
Answer: b. ResourceManagerplacementpreparation
Which tool is commonly used for data serialization in Hadoop?
a. Hive
b. Pig
c. Avro
d. HBase
Answer: c. Avroscribd
What is the role of ZooKeeper in Hadoop?
a. Manages scripts
b. Coordinates distributed applications
c. Handles HTTP requests
d. Replicates data
Answer: b. Coordinates distributed applicationsplacementpreparation
Which feature makes Hadoop suitable for processing large volumes of data?
a. Fault tolerance
b. Low cost
c. Automatic data replication
d. All of the above
Answer: d. All of the aboveplacementpreparation
Which process does MapReduce consist of?
a. Initialization and termination
b. Validation and reduction
c. Map and Reduce
d. Split and Join
Answer: c. Map and Reduceplacementpreparation
What is Apache Pig in Hadoop?
a. Query processing language
b. Scripting platform
c. Resource manager
d. Streaming tool
Answer: b. Scripting platformplacementpreparation
HBase is used for:
a. Streaming data
b. Column-oriented database storage
c. SQL queries
d. Data replication
Answer: b. Column-oriented database storageplacementpreparation
What happens when the Hadoop NameNode fails?
a. Data remains accessible
b. Cluster shuts down
c. Data is lost
d. Replication starts
Answer: b. Cluster shuts downtestbook
Which scheduling algorithm is NOT used in Hadoop?
a. FIFO
b. Round robin
c. Capacity
d. Fair
Answer: b. Round robinscribd
What type of scalability does Hadoop offer?
a. Vertical
b. Horizontal
c. Fixed
d. None
Answer: b. Horizontaltestbook
Hadoop ecosystem includes which of the following?
a. Hive
b. Pig
c. Mahout
d. All of the above
Answer: d. All of the abovesanfoundry
Which is a common use case for Hadoop in data science?
a. Machine learning
b. Real-time analytics
c. Batch processing
d. Encryption
Answer: c. Batch processingplacementpreparation
Whose project was Hadoop originally?
a. Google
b. Yahoo
c. Facebook
d. Apache
Answer: d. Apachetestbook
Which component is used for workflow scheduling in Hadoop?
a. Oozie
b. Pig
c. Hive
d. Sqoop
Answer: a. Oozieplacementpreparation
Hadoop architecture follows what kind of structure?
a. Peer-to-peer
b. Client-server
c. Master-slave
d. Decentralized
Answer: c. Master-slaveplacementpreparation
For machine learning algorithms in Hadoop, which library is commonly used?
a. Mahout
b. Hive
c. Pig
d. HBase
Answer: a. Mahoutsanfoundry
What does Hadoop use for secondary storage?
a. Cloud
b. Local disks
c. RAM
d. SSD
Answer: b. Local diskstestbook
Which company has one of the world’s largest Hadoop clusters?
a. Google
b. Microsoft
c. Facebook
d. Amazon
Answer: c. Facebooktestbook
In Hadoop, data locality means:
a. Data is stored close to processing
b. Data is always centralized
c. Data is archived
d. Data is encrypted
Answer: a. Data is stored close to processingplacementpreparation
What does Avro provide for Hadoop?
a. Security
b. Serialization
c. Indexing
d. Monitoring
Answer: b. Serializationscribd
Hadoop can run on:
a. Proprietary hardware
b. Commodity hardware
c. Mainframes only
d. IBM servers only
Answer: b. Commodity hardwaretestbook
Which part of Hadoop manages resource allocation for jobs?
a. YARN
b. MapReduce
c. HBase
d. Pig
Answer: a. YARNtestbook
Which is used for distributed streaming in Hadoop?
a. Pig
b. Sqoop
c. Flume
d. Hive
Answer: c. Flumesanfoundry
HDFS splits files into blocks by default to:
a. Improve performance
b. Simplify replication
c. Facilitate parallel processing
d. All of the above
Answer: d. All of the aboveplacementpreparation
What is the replication factor default in Hadoop?
a. 1
b. 2
c. 3
d. 5
Answer: c. 3testbook
Which language is Pig Latin closest to?
a. SQL
b. Java
c. C++
d. Python
Answer: a. SQLplacementpreparation
What is the primary advantage of Hadoop over traditional databases?
a. Better for small data
b. Real-time processing
c. Handles massive unstructured data
d. Traditional databases are faster
Answer: c. Handles massive unstructured datatestbook
Which is not an analytics component in Hadoop?
a. Hive
b. Pig
c. MapReduce
d. YARN
Answer: d. YARNtestbook
Hadoop handles which type of processing best?
a. OLTP
b. OLAP
c. ETL
d. Batch
Answer: d. Batchtestbook
The metadata of HDFS files is stored in:
a. DataNode
b. NameNode
c. YARN
d. HBase
Answer: b. NameNodeplacementpreparation
To increase reliability in HDFS, Hadoop uses:
a. Single copy storage
b. Mirrored disks
c. Data replication
d. Load balancing
Answer: c. Data replicationplacementpreparation

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