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12th Computer Science Monthly Test - 2 ( Strings and String manipulations )

St. Britto Hr. Sec. School - Madurai

12th Computer Science Monthly Test - 2 ( Strings and String manipulations )-Aug 2020

Time : 2.30 Hours

Part - A

Multiple Choice Question - Answer All Question

Choose the correct pair from the following

\a- Aarriage Return
\b- Backspace
\v- Value ooo
\f- Formfeed

In python __________ are immutable.

Characters
Strings
Numbers
Functions

Choose the incorrect pair from the following

'EARTH'. Lower() - earth
'Save earth'. Title() - Save Earth
'Save earth ' . Capitalize() - Save earth
'Earth '. Snap case() - eARTH

Python provides a function_________ to change all occurrences of a particular character in a string.

replace( )
change ( )
change all ()
repalceall ()

Choose the incorrect pair from the following

% u - unsigned decimal integer
% d - signed decimal integer
% e - exponential notation
% G - short numbers in exponential notation

The positive subscript always starts with

0
1
-1
0.1

Write the missing symbol in the following statement.

;
,
: :

What will be the output of the following code?
str1 = "Chennai Schools"
str1[7] = "-"

Chennai-Schools
Chenna-School
Type error
Chennai

Which of the following allows creation of multiline strings

' '
" "
""" """
none of these

What is the output from the following statement?
str1 = "python"
print (str 1 [::- 2])

nhy
Pyt
hy
on

What is Escape sequence character for the description character with octal value?

\OHH
\OOO
/OOO
/OHH

Which of the following is the output of the following python code?
str1="TamilNadu"
print(str1[::-1])

Tamilnadu
Tmlau
udanlimaT
udaNlimaT

String index values are also called as

class
function
subscript
arguments

Which of the following formatting character is used to print exponential notation in upper case?

%e
%E
%g
%n

The subscript of a string may be:

Positive
Negative
Both (a) and (b)
Either (a) or (b)

Part - B

Generic 2 - Answer All Question

Write a program to count the occurrences of each word in a given string.

What is slicing?

Write the general format of slice operation.

Write a python program to find the length of a string
Code lines to delete a particular character in a string:
>>> str1="How are you"
>>> del str1[2]
Traceback (most recent call last):
File "<pyshell#7>", line 1, in <module>
del str1[2]

How will you delete a string in Python?

What is String?

What is meant by stride?

Part - C

Generic 3 - Answer All Question

Write the output of the following statements.
(i) print (len ("Corporation"))
(ii) print ("school", Capitalize())
(iii) print ("Welcome" center (15, '*'))

Write the output of the following statements.

strl = 'mammals'
(i) strl. find ('rna')
(ii) strl. find ('rna', 2)
(iii) strl. find ('mi, 2, 4)
(iv) strl. find ('mi, 2, 5)

What is the use of format( )? Give an example.

Program to slice substrings using for loop
str1="COMPUTER"
index=0
for i in str1:
print (str1[:index+1])
index+=1

Write a program to accept a string and print it in reverse order.

Write the syntax and example of using string characters.

Write the out put for the following statement.
strl = "Raja Raja Chozhan"
(i) print (strl. count ('Raja'))
(ii) print (strl. count ('R'))
(iii) print (strl. count ('A'))
(iv) print (strl. count ('a'))
(v) print (strl. count ('a', 0, 5))
(vi) print (strl . count ('a', 11))
Write the description for the following escape sequence.
(i) \r
(ii) \000
(iii) \v

Part - D

Generic 5 - Answer All Question

Write a python program that accept a string from the user and display the same after removing vowels from it.

Program that count the occurrences of a character in a string
def count(s, c):
c1=0
for i in s:
if i == c:
c1+=1
return c1
str1=input ("Enter a String: ")
ch=input ("Enter a character to be searched: ")
cnt=count (str1, ch)
print ("The given character {} is occurs {} times in the given string".format(ch,cnt))

Write the program to display the following pattern
* * * * *
* * * *
* * *
* * *
Write a python program to check whether the given string is palindrome or not.

Write a python program to print the following pattern
*
* *
* * *
* * * *
* * * * *

Program that accept a string from the user and display the same after removing vowels from it
def rem_vowels(s):
temp_str=''
for i in s:
if i in "aA
eEiIoOuU":
pass
else:
temp_str+=i
print ("The string without vowels: ", temp_str)
str1= input ("Enter a String: ")
rem_vowels (str1)

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