Chapter-7 Understanding Data — Online MCQ Test
COMPUTER SCIENCE · Grade 12 · CBSE(NCERT)
Practice Chapter-7 Understanding Data with a free chapter-wise online MCQ test.
This chapter covers: raw data - data types - digital footprints - data collection.
AI-generated questions from basic to board-exam level, with instant results and explanations.
Chapter-7 Understanding Data — Important Questions & Answers
What is raw data?
- A. Data that has been processed and organized
- B. Data in its unprocessed and unorganized form collected from various sources
- C. Data that is stored in databases
- D. Data that has been cleaned and validated
Answer: B. Data in its unprocessed and unorganized form collected from various sources
Raw data is unprocessed information collected directly from sources without any manipulation or organization.
Raw data is unprocessed information collected directly from sources without any manipulation or organization.
Which of the following is NOT a primary data type in computing?
- A. Integer
- B. String
- C. Boolean
- D. Emotion
Answer: D. Emotion
Integer, String, and Boolean are fundamental data types. Emotion is not a standard data type in programming languages.
Integer, String, and Boolean are fundamental data types. Emotion is not a standard data type in programming languages.
A student wants to store a person's telephone number. Which data type should be used?
- A. Integer
- B. String
- C. Boolean
- D. Float
Answer: B. String
Telephone numbers should be stored as String because they may contain special characters and leading zeros, making String the appropriate choice.
Telephone numbers should be stored as String because they may contain special characters and leading zeros, making String the appropriate choice.
A student collects temperature readings every hour for a week. Which characteristic best describes this data?
- A. Qualitative and continuous
- B. Qualitative and discrete
- C. Quantitative and continuous
- D. Quantitative and discrete
Answer: C. Quantitative and continuous
Temperature is quantitative (numerical) data. Since it can take any value within a range, it is continuous rather than discrete.
Temperature is quantitative (numerical) data. Since it can take any value within a range, it is continuous rather than discrete.
Consider two scenarios: Scenario A - A company uses cookies to track website visitor behavior; Scenario B - A person manually writes their daily activities in a notebook. Which statement correctly compares their digital footprints?
- A. Both create identical digital footprints
- B. Only Scenario A creates a digital footprint; Scenario B does not
- C. Scenario B creates a larger digital footprint than Scenario A
- D. Neither scenario creates a digital footprint
Answer: B. Only Scenario A creates a digital footprint; Scenario B does not
Digital footprints are specifically traces created through digital and online activities. Only Scenario A creates a digital footprint; the notebook in Scenario B is a physical record.
Digital footprints are specifically traces created through digital and online activities. Only Scenario A creates a digital footprint; the notebook in Scenario B is a physical record.