Python Questions and Answers – Strings – 4

This set of Python Coding Questions & Answers focuses on “Strings”.

1. What is “Hello”.replace(“l”, “e”)
a) Heeeo
b) Heelo
c) Heleo
d) None
View Answer

Answer:a
Explanation:Execute in shell to verify.

2. To retrieve the character at index 3 from string s=”Hello” what command do we execute (multiple answers allowed) ?
a) s[3] b) s.getitem(3)
c) s.__getitem__(3)
d) s.getItem(3)
View Answer

Answer:a, c
Explanation:__getitem(..) can be used to get character at index specified as parameter.

3. To return the length of string s what command do we execute (multiple answers allowed) ?
a) s.__len__()
b) len(s)
c) size(s)
d) s.size()
View Answer

Answer:a,b
Explanation:Execute in shell to verify.

4. If a class defines the __str__(self) method, for an object obj for the class, you can use which command to invoke the __str__ method.(multiple answers allowed)
a) obj.__str__()
b) str(obj)
c) print obj
d) __str__(obj)
View Answer

Answer:a,b,c
Explanation:Execute in shell to verify.

5. To check whether string s1 contains s2, use
a) s1.__contains__(s2)
b) s1 in s2
c) s1.contains(s2)
d) si.in(s2)
View Answer

Answer:a,b
Explanation:s1 in s2 works in the same way as calling the special function __contains__ .

advertisements

6. Suppose i is 5 and j is 4, i + j is same as
a) i.__add(j)
b) i.__add__(j)
c) i.__Add(j)
d) i.__ADD(j)
View Answer

Answer:b
Explanation:Execute in shell to verify.

7. What is the output of the following code ?

1. class Count:

2.     def __init__(self, count = 0):

3.        self.__count = count

5. c1 = Count(2)

6. c2 = Count(2)

7. print(id(c1) == id(c2), end = " ")

9. s1 = "Good"

10. s2 = "Good"

11. print(id(s1) == id(s2))

a) True False
b) True True
c) False True
d) False False
View Answer

Answer:c
Explanation:Execute in the shell objects cannot have same id, however in the case of strings its different.

8. What is the output of the following code ?

1. class Name:

2.     def __init__(self, firstName, mi, lastName):

3.         self.firstName = firstName

4.         self.mi = mi

5.         self.lastName = lastName

7. firstName = "John"

8. name = Name(firstName, 'F', "Smith")

9. firstName = "Peter"

10. name.lastName = "Pan"

11. print(name.firstName, name.lastName)

advertisements

a) Peter Pan.
b) John Pan.
c) Peter Smith.
d) John Smith.
View Answer

9. What function do you use to read a string?
a) input(“Enter a string”)
b) eval(input(“Enter a string”))
c) enter(“Enter a string”)
d) eval(enter(“Enter a string”))
View Answer

Answer:a
Explanation:Execute in shell to verify.

10. Suppose x is 345.3546, what is format(x, “10.3f”) (_ indicates space)
a) __345.355
b) ___345.355
c) ____345.355
d) _____345.354
View Answer

Answer:b
Explanation:Execute in the shell to verify.