Chapter Exam

Chapter 5 Understanding Data — Online MCQ Test

Q: What is data?

Answer: B. Raw facts and figures without context — Data refers to raw facts and figures. It becomes information only after processing and interpretation.

Q: Which of the following is used to organize data into groups based on common features?

Answer: A. Classification — Classification means arranging data into categories or groups based on shared characteristics.

Q: Which of the following is a common method of data collection?

Answer: A. Survey — Survey is a common data collection method used to gather information from people.

Q: Which of the following best describes data processing?

Answer: C. Converting data into meaningful information — Data processing involves converting raw data into a meaningful form for analysis and use.

Q: A teacher records the heights of students and groups them as 140-149 cm, 150-159 cm, etc. This is an example of:

Answer: B. Classification — The heights are being arranged into categories, which is classification.

Q: A data set has values 10, 15, 15, 20, 25. Which of the following is true?

Answer: C. Median = 15 — After arranging the data, the middle value is 15, so the median is 15.

Q: A student calculates the mean of 5, 7, 9, x, and 14 as 10. What is the value of x?

Answer: C. 8 — If mean is 10 for 5 numbers, total sum is 50. So x = 50 - (5 + 7 + 9 + 14) = 15. Therefore none of the given options are correct.

INFORMATICS PRACTICES · Grade 11 · CBSE(NCERT)

Practice Chapter 5 Understanding Data with a free chapter-wise online MCQ test for CBSE(NCERT) Grade 11 INFORMATICS PRACTICES. This chapter covers: Introduces the concepts of data and information. Covers data collection classification storage processing interpretation visualization and basic statistical measures including mean.... AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter 5 Understanding Data — Important Questions & Answers (FAQ)

Frequently asked questions from CBSE(NCERT) Grade 11 INFORMATICS PRACTICES — Chapter 5 Understanding Data, with answers and explanations. These are sample questions; the exam has its own separate question set.

What is data?

A. Processed and organized facts that are meaningful
B. Raw facts and figures without context ✓
C. Only numbers stored in a computer
D. A graph or chart showing results

Answer: B. Raw facts and figures without context
Data refers to raw facts and figures. It becomes information only after processing and interpretation.

Which of the following is an example of information?

A. 25, 30, 28, 32
B. Marks obtained by students in a class after analysis ✓
C. A list of random temperatures
D. Raw survey responses before sorting

Answer: B. Marks obtained by students in a class after analysis
Information is processed data that is meaningful and useful. Analysis of marks gives information.

Which of the following is used to organize data into groups based on common features?

A. Classification ✓
B. Processing
C. Visualization
D. Interpretation

Answer: A. Classification
Classification means arranging data into categories or groups based on shared characteristics.

Which of the following is a common method of data collection?

A. Survey ✓
B. Formatting
C. Printing
D. Compression

Answer: A. Survey
Survey is a common data collection method used to gather information from people.

Which of the following best describes data processing?

A. Storing raw facts in a file
B. Collecting data from sources
C. Converting data into meaningful information ✓
D. Classifying data into groups only

Answer: C. Converting data into meaningful information
Data processing involves converting raw data into a meaningful form for analysis and use.

A teacher records the heights of students and groups them as 140-149 cm, 150-159 cm, etc. This is an example of:

A. Data storage
B. Classification ✓
C. Interpretation
D. Deletion

Answer: B. Classification
The heights are being arranged into categories, which is classification.

Which of the following is the correct sequence in data handling?

A. Interpretation → Collection → Storage → Processing
B. Collection → Storage → Processing → Interpretation ✓
C. Storage → Collection → Interpretation → Processing
D. Processing → Storage → Collection → Interpretation

Answer: B. Collection → Storage → Processing → Interpretation
Data is first collected, then stored, processed, and finally interpreted to obtain information.

A data set has values 10, 15, 15, 20, 25. Which of the following is true?

A. Mean = Median = Mode
B. Mode = 20
C. Median = 15 ✓
D. Mean = 15

Answer: C. Median = 15
After arranging the data, the middle value is 15, so the median is 15.

Which of the following is the most appropriate description of primary data?

A. Data copied from a magazine article
B. Data collected first-hand for a specific purpose ✓
C. Data stored in a computer memory
D. Data that has been summarized in a chart

Answer: B. Data collected first-hand for a specific purpose
Primary data is collected directly by the investigator for a specific study or purpose.

A student calculates the mean of 5, 7, 9, x, and 14 as 10. What is the value of x?