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i. x + 7 = 4 

∴ x + 7 – 7 

= 4 – 7 ….(Subtracting 7 from both sides) 

∴ x + 0 = -3 

∴ x = -3 

ii. 4p = 12 

∴ 4p/4 = 12/4 ….(Dividing both sides by 4) 

∴ p = 3 

iii. m – 5 = 4 

∴ m – 5 + 5 = 4 + 5 …. (Adding 5 to both sides)

∴ m + 0 = 9 

∴ m = 9 

iv. t/3  = 6

∴ t/3 × 3 = 6 × 3 …. (Multiplying both sides by 3) 

∴ t = 18

Let the number of 50-rupee notes with shubhangi be x.

∴ Number of 20-rupee notes = 2x 

∴ Total amount with Shubhangi = Number of 50-rupee notes × 50 + Number of 20-rupee notes × 20 

= x × 50 + 2x × 20 

= 50x + 40x 

= 90x 

According to the given condition, 

90x = 2700 

∴ x = 2700/90 = 30

∴ Shubhangi has 30 notes of 50 rupees.

Let age of grand daughter be x
age of grandfather is 10 x
A/Q
10 x = 54 + x
9 x = 54
x = 6
10 x = 60
age of grandfather is 60
age of granddaughter is 6

Let the age of Rakesh be x years.

∴ Sania’s age = (x + 5) years. 

According to the given condition, 

x + (x + 5) = 27 

∴ 2x + 5 = 27 

∴ 2x = 27 – 5 

∴ 2x = 22 

∴ x = 22/2 = 11

∴ Sania’s age = x + 5 = 11 + 5 = 16 years 

∴ The ages of Rakesh and Sania are 11 years and 16 years respectively.

Ciliary muscles.

Correct option is  C) iris

Yes. The second clause (the condition) is evaluated before each iteration through a loop.

yes, Can you use one or more loop inside any another while, for or do., while loop.

The for-loop of the loop which executes a sequence of statements multiple times and abbreviates the code that manages the loop variable.

It is the name of space inside computer memory values can be stored.

(a)  6 + 40 = 46 

(b)  10 * 10 = 100

Correct option is B) carbondioxide

Correct option is A) Acid and Base
 

Correct option is A) Crystallization

Correct option is C) Both A & B

a) This is a chemical change. Water + Milk + Tea powder + Sugar → Tea Here tea is a new substance. Hence it is a chemical change, 

b) Making dough for roti is a physical change as there is no formation of new substance.

(b) len(str)

The replace function replaces all occurrences of char 1 with char 2.

Example

>>> str1 = ”How are you”

>>> print (str1)

How are you

>>>print (str1.replace(“o”, “e”))

Hew are yeu

Modular programming: It is the act of designing and writing programs as interactions among functions that each performs a single well-defined function & which have minimal side effect interaction between them. It is heavily procedural. The focus is entirely on writing code (functions). Data is passive. Any code may access the contents of any data structured passed to it. 

Object Oriented programming: it is a programming using “objects”-data structures consisting of data fields & methods together with their interactions to design applications and computer programs. Programming techniques may include features such as data abstraction, encapsulation, messaging, modularity, polymorphism/and inheritance.

(i) Modular programming is the technique which divides the entire program into smaller modules, which perform a specific task. 

(ii) It can often be used in a variety of applications and functions with other components of the system. 

(iii) The order in which the modules are executed by the computer is controlled by the main program. This describes fully the procedures required in the solution to a problem. The procedures are written in the order of the machine execution. 

(iv) OPP is compatible with the modular programming concept to a large extent. Modular Programming enables multiple programmers to divide up the work and debating pieces of the program independently.

s1 = input (“Enter the string to be replaced: “)

s2 = input (“Enter the string to replace with “)

s1 = s2 

print (“Replaced string is “ , s1)

Output:

Enter the string to be replaced: Computer

Enter the string to replace with: repcomputer 

Replaced string is repcomputer

(d) All the above

def word_count(str):

counts = dict ( )

words = str.split ( ) for word in words:

if word in counts:

counts[word] +=1

else:

counts[word]=1

return counts

print (word_count (‘the quick brown fox jumps over the lazy dog.’))

Ouput:

{‘the’: 2, ‘jumps’: 1, ‘brown’: 1, ‘lazy’: 1, ‘fox’: 1, ‘over’: 1, ‘quick’: 1, ‘dog’: 1}

(c) Immutable

str=input (“Enter a string: “)

print (len(str))

Output:

Enter a string: HELLO

5

(d) Third argument of slice operation

(b) C++ भाषा में दो प्रकार के फंक्शन्स होते हैं-लाइब्रेरी फंक्शन व यूजर डिफाइण्ड फंक्शन

जहाँ वैरिएबल एक फंक्शन या ब्लॉक में प्रयोग किए जाते हैं, लोकल वैरिएबल कहलाते हैं।

फंक्शन के निम्नलिखित लाभ हैं।

⦁    फंक्शन किसी भी प्रोग्राम को छोटा बना देता है, जिससे प्रोग्राम समझने में आसानी होती है।
⦁    फंक्शन की सहायता से एक कोड को पुनः नहीं लिखना पड़ता है, यूजर अपनी आवश्यकतानुसार फंक्शन प्रोग्राम में कहीं भी प्रयोग कर सकता है।
⦁    फंक्शन के प्रयोग से प्रोग्राम में त्रुटि खोजना बहुत आसान हो जाता है।

return_type function_name(parameter_list);

किसी फंक्शन को किसी प्रोग्राम में उसका नाम देकर, उसके साथ वास्तविक पैरामीटर को लगाकर एक कोष्ठक के अन्दर रखकर तथा सेमीकॉलन लगाकर कॉल किया जाता है।

(c) बिल्ट-इन या लाइब्रेरी फंक्शन C++ भाषा में पहले से ही सम्मिलित होते हैं।

print (“Enter Y for exit.”)

string1 = input(“Enter first string: “)

if string1 = = ‘x’:

exit();

else:

string2 = input (“Enter second string : “)

print (” \n Both strings before swap : “)

print (“First string = “ , string1)

print (” Second string = “ , string2)

temp = string1

string1 = string2

string2 = temp print (“\n Both strings after swap: “) 

print (“First string = “ , string1)

print (” Second string = “ , string2)

Output:

Enter ‘x’ for exit

Enter first string: code

Enter second string: python

Both strings before swap:

First string = code

Second string = python

Both strings after swap:

First string = python

Second string = code

• C++ is a typed, compiled, general-purpose, case-sensitive, free form programming language that supports procedural, object oriented, and generic programming.
• C++ is regarded as a middle-level language, as it comprises a combination of both high-level and low-level language features.
• C++ was developed by Bjarne Stroustrup starting in 1979 at Bell Labs in Murray Hill, New Jersey as an enhancement to the C language and was originally named C with Classes but later it was renamed C++ in 1983. by Rick Masatti.
• C++ is a super set of C, and virtually, any legal C program is a legal C++ program.

tan(x) फंक्शन किसी कोण x की टेण्जेण्ट ज्ञात करने के लिए प्रयोग होता है।

Adding more strings at the end of an existing strings is Append

(c) Concatenation

(a) A new string value can be assigned to the existing string variable

String slicing:

Slice is a substring of a main string. A substring can be taken from the original string by using [ ] operator and index or subscript values. Thus, [ ] is also known as slicing operator. Using slice operator, we can slice one or more substrings from a main string.

General format of slice operation:

str[start:end]

Where start is the beginning index and end is the last index value of a character in the string. Python takes the end value less than one from the actual index specified. For example, if you want to slice first 4 characters from a string, you have to specify it as 0 to 5. Because, python consider only the end value as n –1.

Example:

slice a single character from a string

>>> str1= ”THIRUKKURAL”

>>> print (str1[0])

T

(a) रिकर्सिव फंक्शन

Comments are included using//

For example, main()

{ cout<< “Hello World”; // prints Hello World

return 0;

}

#include<iostream.h>
#include<conio.n>
int largest (int x, int y);
void main( )
{
int a, b;
cout<<“Enter the first number: “;
cin>>a;
cout<<“Enter the second number: “;
cin>>b;
largest (a, b);
getch( );
}
largest (int a, int b)
{
if(a > b)
cout<<“The first number is greater and second is smaller”;
else
cout<<“The second number is greater and first is smaller”,
}

आउटपुट

Enter the first number: 8
Enter the second number: 5
The first number is greater and second is smaller

Reverse ( )
{
cout<<“The Reverse number”<<end1;
for (int i = 100; i> = 1; i–)
{
cout<<i;
}
}

फंक्शन का उपयोग गणितीय गणनाएँ करने के लिए किया जाता है।

(d) Reverse order

#include

main()

{

cout<< “Hello World”; // prints Hello World

return 0;

} 

सही विकल्प है (c) .h

प्रोग्राम को छोटे-छोटे भागों में विभाजित करना, जो किसी विशेष ऑपरेशन या कार्य उद्देश्य को पूरा कर सके, फंक्शन कहलाता है।