Data Analytics Quiz-2

What is the output of the following code?

```python

string = "Hello, world!"

print(string[7:12])

```

• world

• , wor

• world!

• Hello

Which of the following strings is correctly enclosed using single quotes?

• "This is a string"

• 'Another string'

• `Yet another string`

• '''String with triple single quotes'''

What is the length of the string "GPT-3.5 is amazing."?

• 13

• 15

• 17

• 18

Which string method can be used to convert a string to uppercase letters?

• upper()

• capitalize()

• title()

• casefold()

What is the index of the first occurrence of the letter 'o' in the string "Coding is fun and challenging."?

• 4

• 6

• 8

• 10

Which of the following data structures in Python stores data in key-value pairs?

• List

• Tuple

• Set

• Dictionary

How are dictionary keys accessed in Python?

A)

B)

C)

D)

• Using indexes

• Using parentheses

• Using curly braces

• Using square brackets

What happens if you try to add a key that already exists in a dictionary?

• An error is raised

• The existing value for that key is replaced

• The dictionary remains unchanged

• The dictionary automatically resizes

Which method is used to remove a key-value pair from a dictionary in Python?

• popitem()

• remove()

• delete()

• pop()

What is the result of the following code snippet?

```python

student = {

"name": "Alice",

"age": 20,

"grade": "A"

}

student["school"] = "XYZ School"

print(len(student))

```

• 3

• 4

• 5

• 6