Practice Library
All MCQs
Browse exam-wise, subject-wise, and country-wise MCQs with explanations.
Choose an option to check your answer.
A.
Each node has its own processor, memory, and storage and communicates over a network
B.
All nodes use one central memory bus
C.
Every node stores only metadata
D.
The system runs on a single mainframe
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Correct Answer: A. Each node has its own processor, memory, and storage and communicates over a network
Explanation:
Shared-nothing systems avoid a single shared hardware bottleneck.
Choose an option to check your answer.
A.
Adding more cluster nodes
B.
Dividing data into more files only
C.
Replicating every record across the internet
D.
Increasing the resources of a single machine
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Correct Answer: D. Increasing the resources of a single machine
Explanation:
Vertical scaling upgrades CPU, memory, or storage on one server.
Choose an option to check your answer.
A.
Adding more memory to one machine only
B.
Reducing the number of data partitions
C.
Adding more machines to distribute storage or computation
D.
Replacing distributed processing with manual analysis
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Correct Answer: C. Adding more machines to distribute storage or computation
Explanation:
Horizontal scaling expands a cluster by adding nodes.
Choose an option to check your answer.
A.
Variety
B.
Value
C.
Volume
D.
Volatility
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Correct Answer: B. Value
Explanation:
Value concerns whether analysis leads to meaningful decisions or benefits.
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A.
Veracity
B.
Velocity
C.
Value
D.
Volume
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Correct Answer: A. Veracity
Explanation:
Veracity reflects the trustworthiness and quality of data.
Choose an option to check your answer.
A.
Volume
B.
Veracity
C.
Visualization
D.
Variety
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Correct Answer: D. Variety
Explanation:
Variety captures differences in format, schema, and media type.
Choose an option to check your answer.
A.
Volume
B.
Value
C.
Velocity
D.
Variability
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Correct Answer: C. Velocity
Explanation:
Velocity concerns data generation, ingestion, and response speed.
Choose an option to check your answer.
A.
Velocity
B.
Volume
C.
Variety
D.
Veracity
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Correct Answer: B. Volume
Explanation:
Volume describes the scale of a dataset.
Choose an option to check your answer.
A.
The data volume, velocity, or complexity can exceed one machine's storage or processing capacity
B.
Big Data never contains structured records
C.
Single machines cannot run any algorithms
D.
Traditional tools cannot store numeric values
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Correct Answer: A. The data volume, velocity, or complexity can exceed one machine's storage or processing capacity
Explanation:
Big Data systems distribute storage and computation across multiple machines.
Choose an option to check your answer.
A.
Maximizing complexity regardless of use
B.
Eliminating all human oversight
C.
Using accuracy as the only criterion
D.
Developing models that are fair, explainable, private, and robust
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Correct Answer: D. Developing models that are fair, explainable, private, and robust
Explanation:
Modern systems must perform well while respecting social and operational constraints.
Choose an option to check your answer.
A.
It guarantees the best algorithm
B.
It removes the need for data
C.
It records preprocessing, modeling, and evaluation steps for verification
D.
It prevents every software error
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Correct Answer: C. It records preprocessing, modeling, and evaluation steps for verification
Explanation:
A scripted pipeline can be rerun, reviewed, and updated consistently.
Choose an option to check your answer.
A.
Using Python libraries
B.
Using personal data beyond users' reasonable expectations or consent
C.
Computing graph degree
D.
Applying cross-validation
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Correct Answer: B. Using personal data beyond users' reasonable expectations or consent
Explanation:
Online data can be technically accessible yet still sensitive.
