Chapter 5 Understanding Data — Online MCQ Test
INFORMATICS PRACTICES · Grade 11 · CBSE(NCERT)
Practice Chapter 5 Understanding Data with a free chapter-wise online MCQ test.
This chapter covers: Introduces the concepts of data and information. Covers data collection classification storage processing interpretation visualization and basic statistical measures including mean....
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Chapter 5 Understanding Data — Important Questions & Answers
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.
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.
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.
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.
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.
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.
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.
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.
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.
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?
- A. 6
- B. 7
- C. 8
- D. 10
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.
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.