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12th Computer Science Monthly Test - 1 ( Strings and String manipulations )

St. Britto Hr. Sec. School - Madurai

12th Computer Science Monthly Test - 1 ( Strings and String manipulations )-Aug 2020

Time : 2.30 Hours

Part - A

Multiple Choice Question - Answer All Question

Strings in python:

Changeable
Mutable
Immutable
flexible

A substring can be taken from the original string by using

{ }
( )
[ ]
< >

The 'in' and 'not in ' operators are called as ________ operators.

string
string formatting
membership
reference

Choose the incorrect pair from the following

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

Which of the following operator is used to construct strings?

%
: :
#

In Python, the entire string variable removed using ________ command

Remove
Replace
Del
Delete

Match the following

(i)

\a

(1)

line feed

(ii)

\b

(2)

Backspace

(iii)

\f

(3)

Horizontal Tab

(iv)

\n

(4)

Bell

(v)

\t

(5)

Form feed

2, 4, 5, 1, 3
4, 2, 5, 3, 1
4, 2, 5, 3
4, 5, 2, 1, 3

What is the output from the following statement?
str1 ="welcome"
print (str1 [: : 3]

come
orne
wee
wel

Choose the incorrect pair from the following

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

Find the output for the following
print ('Greater Chennai cooperation's student')

Greater Chennai Corporation's student
Greater Chennai Corporation
S Student
Error: Invalid Syntax

The function used to search the first occurrence of the substring In the given string is

search()
find()
find string ()
searchstring ()

String index values are also called as

class
function
subscript
arguments

Which of the following is used as a place holders which get replaced along with format function?

[ ]
( )
{ }
<>

Which of the following is incorrect statement?
(i) In Python, string are immutable.
(ii) Python allow to modify the already defined string. (iii) Python will not allow deleting a particular character in string.
(iv) In Python, the index value is only a positive integer.

i and iii
ii and iv
i, ii and iv
ii and iii

Choose the correct pair from the following.

% d - unsigned decimal integer.
% 0 - short number in floating point
% i -signed decimal integer
% x - octal integer.

Part - B

Generic 2 - Answer All Question

What is the use of find () function? Explain with an example.

What is slicing?

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

Write the output for the following if strl =
"THIRIKKURAL"
(i) print (strl [0])
(ii) print (strl [0:5])
(iii) print (strl [:5])
(iv) Print (strl [6:])

What it means "String in phython are immutable"?

Do you modify a string in Python?

Differentiate upper() and is upper().

Write a note on the function center().

Write a program to removes all the occurrences of a give character in a string.

Write a program to count the number of characters, words and lines in a given string.

Write a program to print integers with '*' on the right of specified width.

Write a program to add a prefix text to all the lines in a string.
Program to access each character with its negative subscript of a giving string
str1 = input ("Enter a string: ")
index=-1
while index >= -(len(str1)):
print ("Subscript[",index,"] : " + str1[index])
index += -1

What is the use of title () function? Give example.

Write a program to create a mirror of the given string. For example, "weI" = "Iew".

Differentiate lower() and is lower().

Part - C

Generic 3 - Answer All Question

Program to display the following pattern
*
* *
* * *
* * * *
* * * * *
str1=' * '
i=1
while i<=5:
print (str1*i)
i+=1

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

Why 'in' and 'not in' operators are called membership operator? Explain with example.

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))

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

How the positive and negative subscript valuesare assigned? Give example.

Write a note on
(i) isalnum ()
(ii) isalpha ()
(iii) isdigit ()

Write a Python program to display the given pattern
C O M P U T E R
C O M P U T E
C O M P U T
C O M P U
C O M P
C O M
C O
C

Write the formats string characters for the following
(i) Exponential notation
(ii) Floating point numbers
(iii) Short numbers in exponential notation
Write the output of the following statements.
(i) print (len ("Corporation"))
(ii) print ("school", Capitalize())
(iii) print ("Welcome" center (15, '*'))

Fill in the blanks

Format character

Usage

(i)

___

Unsigned decimal integer

(ii)

% 0

_

(iii)

_

Hexadecimal integer

(iv)

% i

___

Part - D

Generic 5 - Answer All Question

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))

Program to create an Abecedarian series. (Abecedarian refers list of elements appear in alphabetical order)
str1="ABCDEFGH"
str2="ate"
for i in str1:
print ((i+str2),end='\t')

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

Write a python program to create an Abecedarian series, (Abecedarian refers list of elements appear in alphabetical order).

Write a python program to display the number of vowels and consonants in the given string.

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