PGCP-BDACMCE (CCE Modules Exam)•20 Questions
Big Data Technologies Practice MCQs
Topic Covered in this Question Set
Big Data Characteristics, Adoption, Sources and Data Curation
Click on an option to check your answer immediately. Full solution & explanation provided for every question.
Interactive Practice Mode
Big Data Technologies Free MCQs
Select an option to test your knowledge with real exam questions and instant explanations.
Total20
Correct0
Wrong0
Progress: 0 of 20 answered0% Accuracy
Q1 of 20
An online retailer stores product details where a phone has fields such as GPS and Camera, while a cable has only length and connector type. Fields change often, and each product is read and updated as one self-contained record. Which NoSQL family fits this data most naturally?
Q2 of 20
A city traffic platform receives readings in which some sensors report negative vehicle counts and two feeds disagree about the same junction. Which V of big data does this problem mainly concern?
Q3 of 20
A mobile app's REST API returns JSON records in which some users have an "address" object and others do not. How is this data best classified?
Q4 of 20
A clickstream averages 6,000 events per second, all day. About how many events arrive in 24 hours?
Q5 of 20
10,000 sensors each send one 200-byte reading every second. Roughly how much raw data do they produce per day, in decimal units?
Q6 of 20
One disk reads at 100 MB/s. About how long does it take to read 1 TB (1,048,576 MB) if the data is spread evenly over 100 such disks read in parallel?
Q7 of 20
A company's database server is already at its maximum RAM and CPU. Instead of buying a bigger server, it adds twenty commodity servers and spreads data and processing across them. What is this approach called?
Q8 of 20
Why do big-data platforms try to run a processing task on the node that already holds the data block it needs?
Q9 of 20
Web server access logs, GPS pings from delivery vans and network router events are best grouped as which kind of big-data source?
Q10 of 20
Which statement reflects a realistic, 'beyond the hype' view of big data?
Q11 of 20
A retail chain's management wants to 'do big data'. Which first step best follows sensible adoption practice?
Q12 of 20
In a big-data team, who is mainly responsible for building and maintaining the pipelines that ingest, transform and load data for others to use?
Q13 of 20
In the FAIR principles for research data, what does the letter 'I' stand for?
Q14 of 20
In the OAIS reference model, which information package does a repository store and preserve for the long term?
Q15 of 20
A curator wants to prove later that the deposited file readings.csv has not changed by even one byte. Which Linux command records the right evidence?
Q16 of 20
A researcher uploads a spreadsheet with columns named T1, T2 and F3 and no README, units or licence. Other scientists cannot reuse it. What is the best curation fix?
Q17 of 20
A repository must withdraw a dataset that has a DOI because of a consent problem. Which action follows good 'open exit' practice?
Q18 of 20
A researcher wants to search, across disciplines, for a suitable repository in which to deposit oceanography data. Which kind of service is designed for this?
Q19 of 20
Decades of rainfall observations exist only on paper ledgers and old magnetic tapes. Which sequence best describes a data-rescue effort?
Q20 of 20
What does this Python code print? ``` import pandas as pd df = pd.DataFrame({"id": [1, 2, 2, 3], "temp": [21.5, None, None, 22.0]}) print(len(df.drop_duplicates()), df["temp"].isna().sum()) ```
Need to review the concepts?
Read Free Study Notes →Read Big Data Technologies Study Notes
Review complete topic notes, syntax guides, code examples, and summary tables.