Class 11 Computer Science · Chapter 5 · Test 2
Data Collection and Preparation
38 MCQs Covers surveys, observations and experiments, with their examples, advantages and limitations. Also covers data preparation, cleaning, transformation, and handling missing data (imputation, flagging, removal).
38 questions · 35 min · 38 marks
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Sample questions
The first 5 of 38. Try each one, then tap to see the answer.
Question 1
Which of the following is NOT a data collection method?
- ASurveys
- BData cleaning
- CObservations
- DExperiments
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Answer: B
Data cleaning is a preparation step.
Question 2
Surveys are best for:
- AObserving natural behavior
- BTesting cause and effect
- CData transformation
- DCollecting large amounts of structured data
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Answer: D
Surveys ask a fixed set of questions.
Question 3
Observation as a data collection method involves:
- AWatching subjects in their natural environment
- BManipulating variables
- CSending online forms
- DRemoving errors
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Answer: A
There is no interference with the subjects.
Question 4
Experiments are useful for:
- ACollecting opinions
- BObserving natural behavior
- CDetermining cause and effect
- DCleaning data
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Answer: C
They change one variable and watch the effect on another.
Question 5
Data preparation includes:
- ACollecting data
- BCleaning and organizing data
- CMaking predictions
- DCalculating probability
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Answer: B
Preparation makes data usable.
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