function

Question 1

return a,b
is it correct or is it gives error

Answer 1

correct
it returns multiple value i.e. a and b

Question 2

when recursive call is made then ____________ will be created in _________________

Answer 2

when recursive call is made then activation record will be created in stack

Question 3

Syntax to create user defined functions

Answer 3

def function_name(parameters):
statement1
statement2
:
return value

Question 4

give example of tail recursion

Answer 4

def tail_rec(n):
if n==0:
return
else:
print(n)
return tail_rec(n-1)

tail_rec(4)

Question 5

tail recursion

Answer 5

In the program the very last statement is the only one recursive call and there is no other statement after that then it is called as tail recursion

Question 6

non-tail recursion

Answer 6

in the program after the recursive call some statements to execute, then it is called non-tail recursion

Question 7

recursion

Answer 7

function calling itself is called recursion

Question 8

tell the error

def summation(a,b):
summation = a+b
return a,b

Answer 8

no error

Question 9

Function calling itself is called __________

Answer 9

recursion

Question 10

is ‘def’ required to create function

Answer 10

yes, required

Question 11

def wish():
print(‘Good evening’)
print(‘hey we are in function’)

for i in range(3):
wish()

Answer 11

Good evening
hey we are in function
Good evening
hey we are in function
Good evening
hey we are in function

Question 12

if recursion doesn’t have termination condition, it will leads to _______________________

Answer 12

stack overflow

Question 13

types of functions

Answer 13

1.)Built-in functions
2.)User defined functions

Question 14

Recursion function should have _____________ condition

Answer 14

termination or base

Question 15

how can we write equivalent non recursive program of tail recursion

Answer 15

by using loops

Question 16

Main advantage of functions

Answer 16

Code reusability

Question 17

example of non tail recursion

Answer 17

def nt(n):
if n<=1:
return
else:
nt(n-2)
print(n)
nt(n-1)
print(n-2)

Question 18

is ‘return’ required to create function

Answer 18

No
return is optional

Question 19

in the program after the recursive call some statements to execute, then it is called

Answer 19

non-tail recursion

Question 20

can we write equivalent non recursive program of tail recursion

Answer 20

yes by using loops

Question 21

types of recursion

Answer 21

4 types
1.)tail recursion
2.)non-tail recursion
3.)indirect recursion
4.)nested recursion

Question 22

recursion internally uses _______________ data structure

Answer 22

stack

Question 23

can we write equivalent non recursive program of non tail recursion

Answer 23

yes but it is very difficult

Question 24

stack overflow

Answer 24

if recursion doesn’t have termination condition, it will leads to stack overflow

Question 25

another name of ‘termination condition’

Answer 25

base condition

Question 26

Activation record

Answer 26

the stack frame(memory) allocated to the recursive function call as activation record.
The creation and deletion of activation record depends on actual function calling sequence

Question 27

special thing about ‘return’ of python which separates it from other languages

Answer 27

in python: a function can return any number of values
in other languages: a function return almost one value

Question 28

keywords uses when we create function

Answer 28

def
return

Question 29

Indirect recursion

Answer 29

The two or more functions calling each other is called indirect recursion

Question 30

Nested Recursion

Answer 30

A recursion function which is passing itself as parameter to a recursive call is called as nested recursion

Question 31

__name__

Answer 31

It is special variable in python which will be added internally. This variable stores information regarding whether the program is executed as individual program or as a module

Question 32

explain the value of __name__

Answer 32

if the __name__ = __main__ then the program is executed as individual
if the __name != __main__ then the program is executed as module and __name__ will return the name of module where it is defined