Advanced Python Interview Questions & Answers on “Strings”.
1. What will be the output of the following Python code?
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class father:
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def __init__(self, param):
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self.o1 = param
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class child(father):
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def __init__(self, param):
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self.o2 = param
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>>>obj = child(22)
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>>>print "%d %d" % (obj.o1, obj.o2)
a) None None
b) None 22
c) 22 None
d) Error is generated
Answer: d
Clarification: self.o1 was never created.
2. What will be the output of the following Python code?
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class tester:
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def __init__(self, id):
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self.id = str(id)
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id="224"
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>>>temp = tester(12)
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>>>print(temp.id)
a) 224
b) Error
c) 12
d) None
Answer: c
Clarification: Id in this case will be the attribute of the class.
3. What will be the output of the following Python code?
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>>>example = "snow world"
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>>>print("%s" % example[4:7])
a) wo
b) world
c) sn
d) rl
Answer: a
Clarification: Execute in the shell and verify.
4. What will be the output of the following Python code?
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>>>example = "snow world"
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>>>example[3] = 's'
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>>>print example
a) snow
b) snow world
c) Error
d) snos world
Answer: c
Clarification: Strings cannot be modified.
5. What will be the output of the following Python code?
a) error
b) u
c) t
d) y
Answer: d
Clarification: Max returns the character with the highest ascii value.
6. Given a string example=”hello” what is the output of example.count(‘l’)?
a) 2
b) 1
c) None
d) 0
Answer: a
Clarification: l occurs twice in hello.
7. What will be the output of the following Python code?
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>>>example = "helle"
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>>>example.find("e")
a) Error
b) -1
c) 1
d) 0
Answer: c
Clarification: Returns lowest index.
8. What will be the output of the following Python code?
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>>>example = "helle"
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>>>example.rfind("e")
a) -1
b) 4
c) 3
d) 1
Answer: b
Clarification: Returns highest index.
9. What will be the output of the following Python code?
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>>>example="helloworld"
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>>>example[::-1].startswith("d")
a) dlrowolleh
b) True
c) -1
d) None
Answer: b
Clarification: Starts with checks if the given string starts with the parameter that is passed.
10. To concatenate two strings to a third what statements are applicable?
a) s3 = s1 . s2
b) s3 = s1.add(s2)
c) s3 = s1.__add__(s2)
d) s3 = s1 * s2
Answer: c
Clarification: __add__ is another method that can be used for concatenation.
advanced interview questions on Python,