Page 46 - PYTHON-11

43. What are binary operators? Give examples.
Ans. Binary operators are those operators that work with two operands. For example, a common binary
expression would be x + y, the addition operator (+) surrounded by two operands. Binary operators are
further subdivided into arithmetic, relational, logical and assignment operators.
44. Differentiate between division operator (/) and floor division operator (//).
Ans. In Python, the division operator (/) performs a division operation on two operands and returns the quotient.
For example,
>>> 5/2
2.5
The floor division (//) performs an integer division and, as a result, an integer value is obtained.
For example,
>>> 8//3
2
Here, the fraction part gets truncated.
45. Define membership operators in Python with examples.
Ans. We use membership operators to check whether a value or variable exists in a sequence (string, list, tuples,
sets, dictionary) or not.
For example, the statements:
>>> x = "Hello, World!"
>>>print("hello" in x)
False #Output
OR
>>>x = "Hello, World!"
>>>print("hello" not in x)
True #Output
46. Which function can be used to know the data type of a variable?
Ans. type() method in Python allows us to know the data type of a variable.
For example,
>>>c=9.8
>>>type(c)
<class 'float'>
47. What is the significance of using break statement?
Ans. In Python, break is a loop control statement. It is used to control the sequence of the loop. Suppose you
want to terminate a loop and skip to the next code after the loop; break will help you do that.
For example,
x=int(input("enter a number"))
for i in range (10):
if x<10:
print(i)
elif x>10:
break
48. Name the sequence surrounded by either single quotes or double quotes.
Ans. String.
49. How can we convert a string to a number in Python?
Ans. A string which contains number will be converted to numeric type using int() function.
50. Define a sequence construct.
Ans. A sequence construct constitutes all the statements which are executed sequentially.
51. What is selection construct?
Ans. A selection construct involves execution on the basis of certain test conditions.
52. Define an infinite loop.
Ans. An infinite loop is a loop where a condition never becomes false and keeps on executing. It is a
never-ending loop, such as a while loop in case the situation never resolves to a False value.
For example,
while True:
print("This is an infinite loop!")

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