Python Basic Code

What is the result of computing the square root of 300 in Python?

A) 17.32
B) 15
C) 18.35
D) 16.50

How can you extract ‘500’ from the string stock_index = “SP500” using indexing?

A) stock_index[2:]
B) stock_index[2:5]
C) stock_index[:3]
D) stock_index[1:4]

Which line of code correctly uses the .format() method to print “The SP500 is at 300 today”?

A) "The {} is at {} today".format(stock_index, price)
B) "The {1} is at {0} today".format(price, stock_index)
C) "The (stock_index) is at (price) today"
D) "The stock_index is at price today"

What function would you use to count the case-insensitive occurrences of ‘price’ in a given string?

A) .find()
B) .count()
C) .index()
D) .search()

Which method is used to ensure the case-insensitive counting of substrings in a string?

.lower()
.upper()
.capitalize()
.title()

What error will occur if you try to call a function that has not been defined in your script?

A) SyntaxError
B) NameError
C) TypeError
D) ValueError

What does the following Python command return: len("SP500")?

3
4
5
6

What is NumPy primarily used for in Python?

A) Web development
B) Data Analysis
C) Machine learning
D) Game development

How do you create a basic array in NumPy?

A) np.array(1,2,3)
B) np.array([1,2,3])
C) np.array((1,2,3))
D) np.array{{1,2,3}}

Which function in NumPy can create a sequence of numbers?

A) np.array()
B) np.arange()
C) np.sequence()
D) np.range()

What does np.zeros((2,3)) return?

A) An array with 2 rows and 3 columns filled with ones
B) An array with 2 rows and 3 columns filled with zeros
C) An empty array of shape (2,3)
D) An array of random numbers of shape (2,3)

What is the result of np.eye(3)?

A) A 3×3 matrix with ones on the diagonal
B) A 3×3 matrix with zeros
C) A vector of length 3
D) An error

How does np.linspace(0, 10, 5) distribute its elements?

A) Randomly between 0 and 10
B) Logarithmically from 0 to 10
C) Evenly from 0 to 10
D) Normally from 0 to 10

What is the main difference between np.random.rand() and np.random.randn()?

A) rand() generates numbers from a normal distribution, randn() from uniform
B) rand() generates numbers from a uniform distribution, randn() from normal
C) There is no difference, both are the same
D) rand() generates integers, randn() generates floating-point numbers

Which method finds the maximum value in a NumPy array?

np.max()
array.maximize()
array.max()
np.maximum()

What does the reshape method do in NumPy?

A) Changes the size of an array
B) Filters elements in an array
C) Modifies the shape of an array without changing its data
D) Splits the array into multiple parts

What is a DataFrame in pandas primarily used for?

A) Data manipulation and analysis
B) Plotting graphs
C) Web development
D) Machine learning algorithms

Which command is used to create a DataFrame from a dictionary?

A) pd.DataFrame(dict)
B) pd.create(dict)
C) pd.dict_to_df(dict)
D) pd.asDataFrame(dict)

What does the .iloc indexer do?

A) Selects data by label
B) Selects data by integer index
C) Selects data by mixed labels and integers
D) Selects data by condition

How do you select a single column from a DataFrame and keep it as a DataFrame?

A) df['column_name']
B) df[['column_name']]
C) df.column_name
D) Both A and C

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