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Python
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Quiz 1
Solution
Q.1.
What does the function math.frexp(x) return?
a) a tuple containing the mantissa and the exponent of x
b) a list containing the mantissa and the exponent of x
c) a tuple containing the mantissa of x
d) a list containing the exponent of x
Q.2.
What is the result of math.fsum([.1 for i in range(20)])?
a) 2.0
b) 20
c) 2
d) 2.0000000000000004
Q.3.
What is the result of sum([.1 for i in range(20)])?
a) 2.0
b) 20
c) 2
d) 2.0000000000000004
Q.4.
What is returned by math.isfinite(float(‘inf’))?
a) True
b) False
c) None
d) error
Q.5.
What is returned by math.isfinite(float(‘nan’))?
a) True
b) False
c) None
d) error
Q.6.
What is x if x = math.isfinite(float(‘0.0’))?
a) True
b) False
c) None
d) error
Q.7.
What will be the output of the following Python code? >>> -float('inf') + float('inf')
a) inf
b) nan
c) 0
d) 0.0
Q.8.
What will be the output of the following Python code? print(math.isinf(float('-inf')))
a) error, the minus sign shouldn’t have been inside the brackets
b) error, there is no function called isinf
c) True
d) False
Q.9.
What is the value of x if x = math.ldexp(0.1)?
a) 1
b) 2.0
c) 0.5
d) none of the mentioned
Q.10.
What is returned by math.modf(1.0)?
a) (0.0, 1.0)
b) (1.0, 0.0)
c) (0.5, 1)
d) (0.5, 1.0)
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