McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Bachelor of Business Administration in Computer Applications (BBA [CA]) .
Chapters
| 1. |
To find the minimum or the maximum of a function, we set the gradient to zero because: |
| A. | The value of the gradient at extrema of a function is always zero |
| B. | Depends on the type of problem |
| C. | Both A and B |
| D. | None of the above |
| Answer» A. The value of the gradient at extrema of a function is always zero | |
| 2. |
Which of the following techniques can not be used for normalization in text mining? |
| A. | Stemming |
| B. | Lemmatization |
| C. | Stop Word Removal |
| D. | None of the above |
| Answer» C. Stop Word Removal | |
| 3. |
In which of the following cases will K-means clustering fail to give good results? 1) Data points with outliers 2) Data points with different densities 3) Data points with nonconvex shapes |
| A. | 1 and 2 |
| B. | 2 and 3 |
| C. | 1 and 3 |
| D. | All of the above |
| Answer» D. All of the above | |
| 4. |
Which of the following is a reasonable way to select the number of principal components "k"? |
| A. | Choose k to be the smallest value so that at least 99% of the varinace is retained. |
| B. | Choose k to be 99% of m (k = 0.99*m, rounded to the nearest integer). |
| C. | Choose k to be the largest value so that 99% of the variance is retained. |
| D. | Use the elbow method. |
| Answer» A. Choose k to be the smallest value so that at least 99% of the varinace is retained. | |
| 5. |
Which of the following is false? |
| A. | Subsetting can be used to select and exclude variables and observations |
| B. | Raw data should be processed only one time. |
| C. | Merging concerns combining datasets on the same observations to produce a result with more variables |
| D. | None Of the above |
| Answer» B. Raw data should be processed only one time. | |
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