Python Problems on Strings

Python Problems on Strings:

1)Write a program to find the length of the string “refrigerator” without using len function.

Ans.

a = "refrigerator" 
count = 0 
for i in a:
   count = count+1 
print (count)  

>>>    12    

2)Which of the following is not a Python legal string operation?

1.    ‘abc’+’abc’ 
2.    ‘abc’ * 3 
3.     ‘abc’ + 3 
4.    ‘abc’.lower( )  

Ans.  ‘abc’ + 3 is not legal string operation  

3)What would the following expression return? 

1.     “Hello World”.lower().upper() 
2.     “123FGH”.isdigit() 
3.     ‘Hello World’.find(“Wor”) 
4.    ‘Hello World’.isalpha()

Ans.

1.                 HELLO WORLD
2.                 False
3.                  6
4.                 False  

4)What will be the output produced by the following code fragments?

y=str(123)
x="hello"*3
print(x,y)

Ans. hellohellohello 123  

5)What will be the output produced by the following code fragments?

x="hello"+"world"
y=len(x)
print(y,x) 

Ans. 10 helloworld    

6)What will be the output produced by the following code fragments?     

x="hello"+"to python"+"world"
for char in x:
    y=char
    print(y,':',end='')

Ans. h:e:l:lo: :t:o: :p:y:t:h:o:n: :w:o:r:l:d:

7)What will be the output produced by the following code fragments?          

x="hello world"
print (x[2:-3],x[-4:-2]) 

Ans.  llo wo or  

8)What will be the output ?

print('fun'+'trial'+'ooty'*3) 

Ans.  funtrialootyootyooty    

9)Write the expression to reverse the string using slicing method?  

Ans.

str="hello world"
print (str[::-1])

>>>   dlrow olleh  

10)  What will be the output ?

st="Hello World"
print (st.replace(st[6],"#")) 

Ans. Hello #orld  

11)  What will be the output?

x="hello world"
print (x[:2],x[:-2],x[-2:])

Ans.  he hello wor ld