This set of Python Multiple Choice Questions & Answers (MCQs) focuses on “Built-in Functions – 3”.
1. Which of the following functions accepts only integers as arguments?
a) ord()
b) min()
c) chr()
d) any()
View Answer
Explanation: The chr() function accepts only integers as arguments and returns the corresponding Unicode character. For example, chr(97) returns ‘a’. In contrast, ord() takes a string of a single Unicode character, min() works with iterables, and any() also takes an iterable.
2. Suppose there is a list such that: l=[2,3,4]. If we want to print this list in reverse order, which of the following methods should be used?
a) reverse(l)
b) list(reverse[(l)])
c) reversed(l)
d) list(reversed(l))
View Answer
Explanation: The correct way to reverse and print a list in Python is to use list(reversed(l)). The reversed() function returns an iterator that yields the elements of the list in reverse order. Wrapping it with list() converts the iterator into a list. So, for l = [2, 3, 4], list(reversed(l)) will output [4, 3, 2].
3. What will be the output of the following Python function?
print(float(' -12345\n'))
(Note that the number of blank spaces before the number is 5)
a) -12345.0 (5 blank spaces before the number)
b) -12345.0
c) Error
d) -12345.000000000…. (infinite decimal places)
View Answer
Explanation: The float() function in Python automatically strips leading and trailing whitespace (including spaces and newline characters) from the input string before converting it to a floating-point number. So, float(‘ -12345\n’) correctly returns -12345.0 without raising an error or preserving whitespace.
4. What will be the output of the following Python function?
print(ord(‘A’)) print(ord(65))
a)
A 65
b)
65 Error
c)
A Error
d)
Error ErrorView Answer
Explanation: Here,
- ord(‘A’) returns the ASCII (Unicode) integer value of the character ‘A’, which is 65.
- ord(65) will cause a TypeError because ord() expects a single character string, not an integer.
So the output will be:
65 Error
5. What will be the output of the following Python function?
print(float('-infinity')) print(float('inf'))
a)
–inf inf
b)
–infinity inf
c)
Error Error
d)
Error Junk valueView Answer
Explanation: The float() function in Python can convert special string representations of floating-point numbers such as ‘inf’ for positive infinity and ‘-infinity’ (or ‘-inf’) for negative infinity. Thus, float(‘-infinity’) returns negative infinity (-inf) and float(‘inf’) returns positive infinity (inf).
6. Which of the following functions will not result in an error when no arguments are passed to it?
a) min()
b) divmod()
c) all()
d) float()
View Answer
Explanation: The built-in functions min(), max(), divmod(), ord(), any(), all() etc throw an error when no arguments are passed to them. However there are some built-in functions like float(), complex() etc which do not throw an error when no arguments are passed to them. The output of float() is 0.0.
7. What will be the output of the following Python function?
print(hex(15))
a) f
b) 0xF
c) 0Xf
d) 0xf
View Answer
Explanation: The hex() function converts an integer to its hexadecimal string representation using lowercase letters and includes the 0x prefix. So, hex(15) returns ‘0xf’.
8. Which of the following functions does not throw an error?
a) ord()
b) ord(‘ ‘)
c) ord(”)
d) ord(“”)
View Answer
Explanation: The ord() function in Python returns the Unicode code point for a given single character. When you pass a blank space ‘ ‘ to ord(), it returns 32, which is the ASCII value for a space character, so it does not throw an error. However, calling ord() without any argument or passing an empty string “” causes an error because ord() requires exactly one character as input. Therefore, only ord(‘ ‘) among the given options does not raise an error.
9. What will be the output of the following Python function?
print(len(["hello",2, 4, 6]))
a) 4
b) 3
c) Error
d) 6
View Answer
Explanation: The len() function returns the number of elements in the list, regardless of their types. In this case, the list [“hello”, 2, 4, 6] contains four elements, so len() returns 4.
10. What will be the output of the following Python function?
print(oct(7)) print(oct('7'))
a)
Error 07
b)
0o7 7
c)
0o7 Error
d)
07 0o7View Answer
Explanation: The oct() function in Python converts an integer into its octal string representation. When you pass the integer 7 to oct(7), it returns the string ‘0o7’, which is the octal equivalent of the decimal number 7. However, if you try to pass a string like ‘7’ to the oct() function, it will result in a TypeError because oct() only accepts integers as valid input. Thus, the first call outputs 0o7, while the second call raises an error.
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