Q16. What is a function?
Ans: Function is a collection of statements, which is defined once and then call it later to do some executions. Below is the function definition example
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def total_course_durations(c1,c2): training=curse_duration() training.hours=c1.hours+c2.hours training.minutes=c1.minutes+c2.minutes training.seconds=c1.seconds+c2.seconds return training
total_duration=total_course_durations(hadoop_training,spark_training)
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Name of the function: total_course_duration
Statements: All orange color lines are statements.
return: It is a return statements.
total_duration: It is a variable, holding the values return by function call.
Function Arguments: These two variables are known as function arguments hadoop_training,spark_training
Q17. How do you convert data from one data type to another data types?
Ans: There are various functions available, which can help you convert data from one data types to another data type. See the example below
int(‘100’) -> 100 #Converting string to int
flaot(‘100.5’) -> 100.5 #Converting string to float
str(3.02) -> ‘3.02’ #Converting float to string
Q18. What is the module in Python?
Ans: Python module is any python file with .py extension, which contains functions and variables are known as Python Module. To use module in our current program we have to import it first. There are in-built modules which are provided by Python itself e.g. import math (Here, math is a Python module)
Q19. What do you mean by a fruitful functions?
Ans: Function, which return a value is known as fruitful function. E.g math.sqrt(4), it will return 2
Q20. What is void function?
Ans: Function which does not return a value is known as void function.
