ExamAdept

What does the min() function in Python do?

A:

Returns the minimum value in a list or tuple

B:

Rounds a floating-point number down to the nearest integer

C:

Converts a string to lowercase

D:

Checks if a variable is of a certain type

Answer: A

The min() function is used to find the smallest value in a list or tuple.

For example, if you have the following list:

list = [1, 2, 3, 4, 5]

You can use the min() function to find the smallest element in the list, which would be 1.

The min() function can be useful for a variety of tasks, such as finding the smallest value in a dataset, or finding the smallest number of items in a stock.

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What is the output of the following code snippet?

my_tuple = (1, 2, 3, 4, 5)
print(my_tuple[-2:])

A:

(4, 5)

B:

(2, 3, 4, 5)

C:

(3, 4, 5)

D:

(2, 3)

Answer: A

my_tuple[-2:] slices the tuple my_tuple starting from the second-to-last element (index -2) to the end of the tuple.

So, it selects elements at indices -2 and -1, which are 4 and 5 respectively, resulting in the tuple (4, 5).

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What will be the output of the following code snippet?

my_string = "Python"
print(my_string[1:5:2])

A:

yhn

B:

yh

C:

yhon

D:

yto

Answer: B

The slicing syntax [start:stop:step] is used, selecting characters from index 1 to 5 with a step of 2.

my_string[1:5:2] slices the string my_string starting from index 1 (inclusive) up to index 5 (exclusive), with a step size of 2.

So, it selects characters at indices 1 and 3 (1+step-size) (skipping index 5), which are 'y' and 'h' respectively.

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Which of the following statements is true about tuples?

A:

Tuples are mutable

B:

Tuples can not have duplicate elements

C:

Elements in a tuple can be accessed using indices

D:

Tuples are created using square brackets

Answer: C

Tuples in Python are ordered and immutable. Elements can be accessed using indices.

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What will be the output of the following code snippet?

x = 10
y = "5"
result = x + int(y)
print(result)

A:

15

B:

105

C:

"10" + "5"

D:

Error

Answer: A

The int(y) converts the string '5' to an integer, and then the addition results in 10 + 5 = 15.

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Questions for: Data Types