| 181 |
What does a firewall do? |
Computer Science/Informatics Practices
Network security |
Easy |
| 182 |
Which symbol in a browser's address bar usually indicates an HTTPS connection? |
Computer Science/Informatics Practices
Network security |
Easy |
| 183 |
A company hires an expert to break into its own systems with permission and report weaknesses. This person is |
Computer Science/Informatics Practices
Network security |
Medium |
| 184 |
Why should antivirus software be updated regularly? |
Computer Science/Informatics Practices
Network security |
Medium |
| 185 |
Why is HTTPS preferred over HTTP when entering a password on a website? |
Computer Science/Informatics Practices
Network security |
Hard |
| 186 |
Which Python library is mainly used for plotting graphs and charts? |
Computer Science/Informatics Practices
Python libraries for data |
Easy |
| 187 |
What is the output of print(np.array([1, 2, 3]) * 2) after import numpy as np? |
Computer Science/Informatics Practices
Python libraries for data |
Easy |
| 188 |
What is the shape of np.array([[1, 2, 3], [4, 5, 6]])? |
Computer Science/Informatics Practices
Python libraries for data |
Medium |
| 189 |
What does np.arange(1, 10, 3) produce? |
Computer Science/Informatics Practices
Python libraries for data |
Medium |
| 190 |
Which statement correctly contrasts a NumPy array with a Pandas DataFrame? |
Computer Science/Informatics Practices
Python libraries for data |
Hard |
| 191 |
What are the index labels of pd.Series([3, 6, 9]) when no index is given? |
Computer Science/Informatics Practices
Series |
Easy |
| 192 |
For s = pd.Series([10, 20, 30, 40], index=['a', 'b', 'c', 'd']), what is s['b']? |
Computer Science/Informatics Practices
Series |
Easy |
| 193 |
For the same Series s with labels a to d, how many elements does s['a':'c'] contain? |
Computer Science/Informatics Practices
Series |
Medium |
| 194 |
What does pd.Series([4, 8, 12, 16, 20]).tail(2) return? |
Computer Science/Informatics Practices
Series |
Medium |
| 195 |
s1 = pd.Series([1, 2, 3], index=['a', 'b', 'c']) and s2 = pd.Series([10, 20], index=['b', 'c']). What is the … |
Computer Science/Informatics Practices
Series |
Hard |
| 196 |
df = pd.DataFrame({'Name': ['A', 'B', 'C'], 'Marks': [70, 85, 60]}). What is df.shape? |
Computer Science/Informatics Practices
DataFrames |
Easy |
| 197 |
Which statement adds a new column named City to an existing DataFrame df with three rows? |
Computer Science/Informatics Practices
DataFrames |
Easy |
| 198 |
Which statement removes the column Grade from df and returns the result? |
Computer Science/Informatics Practices
DataFrames |
Medium |
| 199 |
A DataFrame has 4 rows and 3 columns. What is the shape of its transpose df.T? |
Computer Science/Informatics Practices
DataFrames |
Medium |
| 200 |
df has shape (3, 3). The statement df2 = df.drop('Grade', axis=1) is run. What are the shapes of df and df2? |
Computer Science/Informatics Practices
DataFrames |
Hard |