Top 350+ Solved Data Mining and Data Warehouse MCQ Questions Answer
Q. Extreme values that occur infrequently are called as _________.
a. outliers.
b. rare values.
c. dimensionality reduction.
d. all of the above.
Q. Box plot and scatter diagram techniques are _______.
a. graphical.
b. geometric.
c. icon-based.
d. pixel-base
Q. __________ is used to proceed from very specific knowledge to more general information.
a. induction.
b. compression.
c. approximation.
d. substitution.
Q. Describing some characteristics of a set of data by a general model is viewed as ____________
a. induction.
b. compression.
c. approximation.
d. summarization.
Q. _____________ helps to uncover hidden information about the data.
a. induction.
b. compression.
c. approximation.
d. summarization.
Q. _______ are needed to identify training data and desired results.
a. programmers.
b. designers.
c. users.
d. administrators.
Q. Overfitting occurs when a model _________.
a. does fit in future states.
b. does not fit in future states.
c. does fit in current state.
d. does not fit in current state.
Q. The problem of dimensionality curse involves ___________.
a. the use of some attributes may interfere with the correct completion of a data mining task.
b. the use of some attributes may simply increase the overall complexity.
c. some may decrease the efficiency of the algorithm.
d. all of the above.
Q. Incorrect or invalid data is known as _________.
a. changing dat
b. noisy data.
c. outliers.
d. missing data.
Q. ROI is an acronym of ________.
a. return on investment.
b. return on information.
c. repetition of information.
d. runtime of instruction
Q. The ____________ of data could result in the disclosure of information that is deemed to beconfidential.
a. authorized use.
b. unauthorized use.
c. authenticated use.
d. unauthenticated use.
Q. ___________ data are noisy and have many missing attribute values.
a. preprocessed.
b. cleaned.
c. real-world.
d. transforme
Q. SQL stand for _________.
a. standard query language.
b. structured query language.
c. standard quick list.
d. structured query list.
Q. Which of the following is not a data mining metric?
a. space complexity.
b. time complexity.
c. roi.
d. all of the above.