56). What will be the output of the following Python expression?
print(4.00/(2.0+2.0))
[A]Error
[B]1.0
[C]1.00
[D]1
Show Answer
Correct Answer: 1.0
Notes:
Answer: b
Explanation: The result of the expression shown above is 1.0 because print rounds off digits.
57). What will be the value of X in the following Python expression?
X = 2+9*((3*12)-8)/10
[A]30.0
[B]30.8
[C]28.4
[D]27.2
Show Answer
Correct Answer: 27.2
Notes:
Answer: d
Explanation: The expression shown above is evaluated as: 2+9*(36-8)/10, which simplifies to give 2+9*(2.8), which is equal to 2+25.2 = 27.2. Hence the result of this expression is 27.2.
58). Which of the following expressions involves coercion when evaluated in Python?
X = 2+9*((3*12)-8)/10
[A]4.7 – 1.5
[B]7.9 * 6.3
[C]1.7 % 2
[D]3.4 + 4.6
Show Answer
Correct Answer: 1.7 % 2
Notes:
Answer: c
Explanation: Coercion is the implicit (automatic) conversion of operands to a common type. Coercion is automatically performed on mixed-type expressions. The expression 1.7 % 2 is evaluated as 1.7 % 2.0 (that is, automatic conversion of int to float).
59). What will be the output of the following Python expression?
24//6%3, 24//4//2
[A](1,3)
[B](0,3)
[C](1,0)
[D](3,1)
Show Answer
Correct Answer: (1,3)
Notes:
Answer: a
Explanation: The expressions are evaluated as: 4%3 and 6//2 respectively. This results in the answer (1,3). This is because the associativity of both of the expressions shown above is left to right.
60). Which among the following list of operators has the highest precedence?
+, -, **, %, /, <<, >>, |
[A]<<, >>
[B]**
[C]|
[D]%
Show Answer
Correct Answer: **
Notes:
Answer: b
Explanation: The highest precedence is that of the exponentiation operator, that is of **.
61). What will be the value of the following Python expression?
float(4+int(2.39)%2)
Show Answer
Correct Answer: 4.0
Notes:
Answer: c
Explanation: The above expression is an example of explicit conversion. It is evaluated as: float(4+int(2.39)%2) = float(4+2%2) = float(4+0) = 4.0. Hence the result of this expression is 4.0.
62). Which of the following expressions is an example of type conversion?
float(4+int(2.39)%2)
[A]4.0 + float(3)
[B]5.3 + 6.3
[C]5.0 + 3
[D]3 + 7
Show Answer
Correct Answer: 4.0 + float(3)
Notes:
Answer: a
Explanation: Type conversion is nothing but explicit conversion of operands to a specific type. Options 5.3 + 6.3 and 5.0 + 3 are examples of implicit conversion whereas option 4.0 + float(3) is an example of explicit conversion or type conversion.
63). Which of the following expressions results in an error?
float(4+int(2.39)%2)
[A]float(‘10’)
[B]int(‘10’)
[C]float(’10.8’)
[D]int(’10.8’)
Show Answer
Correct Answer: int(’10.8’)
Notes:
Answer: d
Explanation: All of the above examples show explicit conversion. However the expression int(’10.8’) results in an erro
64). What will be the value of the following Python expression?
4+2**5//10
Show Answer
Correct Answer: 7
Notes:
Answer: b
Explanation: The order of precedence is: **, //, +. The expression 4+2**5//10 is evaluated as 4+32//10, which is equal to 4+3 = 7. Hence the result of the expression shown above is 7.
65). The expression 2**2**3 is evaluates as: (2**2)**3.
4+2**5//10
[A]True
[B]False
[C]none
[D]none of the mentioned
Show Answer
Correct Answer: False
Notes:
Answer: b
Explanation: The value of the expression (2**2)**3 = 4**3 = 64. When the expression 2**2**3 is evaluated in python, we get the result as 256, because this expression is evaluated as 2**(2**3). This is because the associativity of exponentiation operator (**) is from right to left and not from left to right.