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[General] Trustable Reliable SDS Exam Voucher for Real Exam

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【General】 Trustable Reliable SDS Exam Voucher for Real Exam

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DASCA Senior Data Scientist Sample Questions (Q13-Q18):NEW QUESTION # 13
Tar is an example of:
  • A. Archive file format
  • B. Text file format
  • C. ARV file format
  • D. CSV file format
  • E. None of the above
Answer: A
Explanation:
TAR (Tape Archive) is a widely used archive file format in Unix/Linux environments. It is used to combine multiple files into a single archive file (with extension .tar).
Option A: Correct. TAR is specifically designed for archiving.
Option B (CSV): Incorrect. CSV (Comma-Separated Values) is a tabular text data format.
Option C (ARV): Incorrect - no such format.
Option D (Text): Incorrect. Though TAR may contain text files, the TAR format itself is not plain text but an archive format.
Option E: Incorrect since Option A is valid.
Thus, TAR is an Archive file format.
Reference:
DASCA Data Scientist Knowledge Framework (DSKF) - Data Storage Formats in Data Science & Engineering.

NEW QUESTION # 14
Which of the following is TRUE for data lake?
  • A. The data lake enables organizations to gather, manage, enrich, and analyze many new sources of data, whether structured or unstructured
  • B. The data lake enables organizations to treat data as an organizational asset to be gathered and nurtured versus a cost to be minimized
  • C. The data lake can make both of the Business Intelligence and Data Science environments less agile and more productive
  • D. The data lake can make both of the Business Intelligence and Data Science environments more agile and more productive
  • E. None of the above
Answer: A,B,D
Explanation:
But per MCQ single-choice format # answer: A (though ideally A, B, C are correct).
A data lake is a centralized repository designed to store raw, structured, semi-structured, and unstructured data at scale. It provides:
Agility and productivity (Option A): Data lakes support flexible ingestion and faster access, making BI and data science environments more efficient.
Data integration (Option B): They handle multiple types of data, enabling advanced analytics and machine learning use cases.
Data as an asset (Option C): They shift perspective, treating data as a strategic resource, not just a storage cost.
Option D: Incorrect. Data lakes improve agility, not reduce it.
Option E: Incorrect, since multiple true statements exist.
Thus, the correct choice per DASCA context is Option A (with B and C also being true).
Reference:
DASCA Data Scientist Knowledge Framework (DSKF) - Data Engineering: Data Lakes vs Warehouses.

NEW QUESTION # 15
Which of the following phases is NOT a Big Data Business Model Maturity Index?
  • A. Business Strategy
  • B. Data Monetization
  • C. Business Optimization
  • D. Business Monitoring
  • E. Business Metamorphosis
Answer: A
Explanation:
The Big Data Business Model Maturity Index (BDBMMI) defines phases organizations pass through in leveraging data strategically:
Business Monitoring (A): Tracking metrics and reporting.
Business Insights (not listed in options but part of the framework).
Business Optimization (B): Using analytics to improve efficiency.
Data Monetization (D): Creating new revenue streams with data.
Business Metamorphosis (E): Transforming the business model through data.
Business Strategy (Option C): While strategy is essential, it is not one of the defined phases of BDBMMI.
Thus, the correct answer is Option C (Business Strategy).
Reference:
DASCA Data Scientist Knowledge Framework (DSKF) - Big Data Business Model Maturity Index (BDBMMI).

NEW QUESTION # 16
Which of the following is used to summarize a dataset by showing the median, quantiles, and min/max values for each of the variables?
  • A. Bar Charts
  • B. Scatter Chart
  • C. Pie Charts
  • D. Histogram
  • E. Box Plots
Answer: E
Explanation:
A Box Plot (also called Whisker Plot) is a visualization tool used to summarize data distribution using five- number summary:
Minimum,
First quartile (Q1),
Median (Q2),
Third quartile (Q3),
Maximum.
It also highlights outliers explicitly.
Option A (Box Plots): Correct.
Option B (Pie Charts): Show proportions, not distribution.
Option C (Histogram): Shows frequency distribution but not quartiles/median.
Option D (Scatter Chart): Used for relationships between two variables, not summary statistics.
Option E (Bar Charts): Compare categories, not statistical spread.
Thus, the correct answer is Option A (Box Plots).
Reference:
DASCA Data Scientist Knowledge Framework (DSKF) - Data Visualization Tools: Box Plots and Statistical Summaries.

NEW QUESTION # 17
Which of the following is NOT a main data container in Python?
  • A. Lists
  • B. Tuples
  • C. Dict
  • D. LinkedList
Answer: D
Explanation:
Python's built-in data containers are widely used in data science and programming:
Lists (Option A): Ordered, mutable sequences.
Tuples (Option B): Ordered, immutable sequences.
Dict (Option D): Dictionaries, key-value data structures implemented using hash tables.
LinkedList (Option C): Python does not provide a native linked list as a built-in container. While linked lists can be implemented manually or through external libraries (e.g., collections.deque for efficient appends
/pops), they are not part of Python's main native containers.
Thus, the correct answer is Option C (LinkedList).
Reference:
DASCA Data Scientist Knowledge Framework (DSKF) - Programming for Data Science: Python Data Structures.

NEW QUESTION # 18
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