Python MCQ - String - 4

This set of Python Multiple Choice Questions & Answers (MCQs) focuses on “Strings – 4”.

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[]
b) s.getitem(3)
c) s.__getitem__(3)
d) s.getItem(3)
View Answer

Answer: 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?
a) s.__len__()
b) len(s)
c) size(s)
d) s.size()
View Answer

Answer: a
Explanation: Execute in shell to verify.

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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.
a) obj.__str__()
b) str(obj)
c) print obj
d) all of the mentioned
View Answer

Answer: d
Explanation: Execute in shell to verify.

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

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

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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 will be the output of the following Python code?

```
class Count:
```
```
    def __init__(self, count = 0):
```
```
       self.__count = count
```
```
 
```
```
c1 = Count(2)
```
```
c2 = Count(2)
```
```
print(id(c1) == id(c2), end = " ")
```
```
 
```
```
s1 = "Good"
```
```
s2 = "Good"
```
```
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 will be the output of the following Python code?

```
class Name:
```

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

```
        self.firstName = firstName
```
```
        self.mi = mi
```
```
        self.lastName = lastName
```
```
 
```
```
firstName = "John"
```
```
name = Name(firstName, 'F', "Smith")
```
```
firstName = "Peter"
```
```
name.lastName = "Pan"
```
```
print(name.firstName, name.lastName)
```

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

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

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.

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