Which of the following Python functions is used to iterate over a sequence of numbers by specifying a numeric end value within its parameters ?

1. range()
2. len()
3. substring()
4. random()

What is the output of the following ?

d = {0: 'a', 1: 'b', 2: 'c'}
for i in d:
    print(i)

1.

0  
1  
2

2.

a  
b  
c

3.

0  
a  
1  
b  
2  
c  

4.

2  
a  
2  
b  
2  
c  

Which arithmetic operator(s) cannot be used with strings ?

1. +
2. *
3. -
4. All of these

What will be the output when the following code is executed?

>>> strl = "helloworld"
>>> strl[ : : -1]

1. dlrowolleh
2. hello
3. world
4. helloworld