Question 1

Question 5Assertion (A): Comments are non-executable statements that enable the users to understand the program logic.Reasoning (R): Comments are basically statements used to put remarks. The comments are used to explain the code and to make it more informative for the users.Both A and R are true and R is the correct explanation of A.Both A and R are true but R is not the correct explanation of A.A is true but R is false.A is false but R is true.

Accepted Answer

Both A and R are true and R is the correct explanation of A.ExplanationComments are statements in a script that are ignored by the Python interpreter. Comments are basically statements used to put remarks and are used to explain the code and to make it more informative for the users. They make the code more readable and understandable for human beings.

Question 2

Question 6Assertion (A): A set of valid characters recognized by Python constitutes a character set.Reasoning (R): Character set in Python is a subset of Python tokens.Both A and R are true and R is the correct explanation of A.Both A and R are true but R is not the correct explanation of A.A is true but R is false.A is false but R is true.

Accepted Answer

A is true but R is false.ExplanationCharacter set is a set of valid characters recognized by Python. A character represents any letter, digit or any other symbol present on the keyword. On the other hand, a token is the smallest element of a Python script that is meaningful to the interpreter which includes keywords, identifiers, literals, operators and delimiters/punctuators. A character set can be used to form tokens, but not all tokens are part of the character set.

Question 3

Question 2Identifier name cannot be composed of special characters other than ............... .#Hyphen (-)$	ext{	extdollar}$Underscore (_)

Accepted Answer

Underscore (_)Reason — In Python, an identifier name can only be composed of letters (both uppercase and lowercase), digits, and underscores (_). Special characters like #, hyphen (-), and $	ext{	extdollar}$ are not allowed in identifier names.

Question 4

Question 15What will be the output of the following Python code?>>> 6*3+4**2//5-8
1314ErrorNone

Accepted Answer

13Reason — The expression 6*3+4**2//5-8 follows Python's operator precedence rules, where exponentiation (4**2) is evaluated first resulting in 16. Then, floor division (16//5) is calculated as 3. Next, multiplication (6*3) gives 18. Adding these results (18 + 3) yields 21. Finally, subtracting 8 from 21 results in 13.

Question 5

Question 16What will be the output of the following Python code?>>> a=72.55
>>> b=10
>>> c=int(a + b)
>>> c
72.557282None of these

Accepted Answer

82Reason — In the above code, a is assigned the floating-point number 72.55, and b is assigned the integer 10. The variable c is assigned the expression a + b resulting in 72.55 + 10 = 82.55. Then, the int() function is used to convert the result of a + b to an integer. Therefore, int(82.55) results in 82.

Question 6

Question 1Write a Python command/instruction/statement to display your name.

Accepted Answer

print("Ankita Sharma")OutputAnkita Sharma

Question 7

Question 3Evaluate the following expressions manually:(a) (2 + 3) ** 3 - 6/2(b) (2 + 3) * 5//4 + (4 + 6)/2(c) 12 + (3 * 4 - 6)/3(d) 12 + (3 ** 4 - 6)//2(e) 12 * 3 % 5 + 2 * 6//4(f) 12 % 5 * 3 + (2 * 6)//4

Accepted Answer

(a) (2 + 3) ** 3 - 6/2= 5**3 - 6/2= 125 - 6/2= 125 - 3.0= 122.0(b) (2 + 3) * 5//4 + (4 + 6)/2= 5 * 5//4 + 10/2= 25 // 4 + 10/2= 6 + 10/2= 6 + 5.0= 11.0(c) 12 + (3 * 4 - 6)/3= 12 + (12 - 6)/3= 12 + 6/3= 12 + 2.0= 14.0(d) 12 + (3 ** 4 - 6)//2= 12 + (81 - 6)//2= 12 + 75//2= 12 + 37= 49(e) 12 * 3 % 5 + 2 * 6//4= 36 % 5 + 2 * 6//4= 1 + 2 * 6//4= 1 + 12 // 4= 1 + 3= 4(f) 12 % 5 * 3 + (2 * 6)//4= 2 * 3 + (2 * 6)//4= 6 + 12 // 4= 6 + 3= 9

Question 8

Question 4Evaluate the above expressions by using IDLE as a calculator and verify the results that you get manually.

Accepted Answer

(a)>>>(2 + 3) ** 3 - 6 / 2
Output122.0
(b)>>>(2 + 3) * 5 // 4 + (4 + 6) / 2
Output11.0
(c)>>>12 + (3 * 4 - 6) / 3
Output14.0
(d)>>>12 + (3 ** 4 - 6) // 2
Output49
(e)>>>12 * 3 % 5 + 2 * 6 // 4
Output4
(f)>>>12 % 5 * 3 + (2 * 6) // 4
Output9

Question 9

Question 7Explain the difference between syntax error and runtime error with examples.

Accepted Answer

Syntax errors are errors that occur due to incorrect format of a Python statement. They occur while the statement is being translated into machine language and before being executed. They are the most common type of errors which are easily traceable. These errors can be corrected by the user as the reason for the error and an appropriate message about what is wrong in the program is displayed.For example, print "Hello World" has syntax error as it violates the language protocol by not giving parentheses with the print() function. So, the corrected statement should be: print("Hello World").Runtime errors are errors that occur while a program is executing, causing it to crash or behave unexpectedly. These errors are due to invalid operations or conditions that the program encounters during execution, which were not detected during compilation or before the program ran.For example, 10 * (1/0) will generate runtime error as division of any number by 0 is undefined.

Question 10

Question 8Identify invalid variable names from the following, giving reason for each:Group, if, total marks, S.I., volume, tot_strength, #tag, tag$	ext{	extdollar}$, 9a

Accepted Answer

Group — It is a valid variable name.if — It is a reserved keyword in Python and cannot be used as a variable name.total marks — It contains a space, which is not allowed in variable names.S.I. — It contains a dot (.), which is not allowed in variable names.volume — It is a valid variable name.tot_strength — It is a valid variable name.#tag — It starts with a hash (#), which is not allowed in variable names.tag$	ext{	extdollar}$ — It contains a dollar sign ($	ext{	extdollar}$), which is not allowed in variable names.9a — It starts with a number, which is not allowed in variable names.

Question 11

Question 9(a)Find the output of the following code:x=3
y=x+2
x+=y
print(x,y)

Accepted Answer

Output8 5
Explanationx = 3
y = x + 2x is initialized to 3.y is set to x + 2, which means y = 3 + 2 = 5.x += yThe += operator adds the value of y to x and assigns the result back to x.Current values are:x = 3y = 5Calculation: x + y = 3 + 5 = 8Updating x: x += 5 means x = x + 5So, x = 3 + 5 = 8.print(x, y)The final values of the variables are:x = 8y = 5Hence, the output of the program is:8 5

Question 12

Question 9(b)Find the output of the following code:x=-2
y=2
x+=y
y-=x
print (x,y)

Accepted Answer

Output0 2
Explanationx += yThe += operator adds the value of y to x and assigns the result back to x.Current values are:x = -2y = 2Calculation: x + y = -2 + 2 = 0Updating x: x += 2 means x = x + 2So, x = -2 + 2 = 0.y -= xThe -= operator subtracts the value of x from y and assigns the result back to y.Current values are:x = 0y = 2Calculation: y - x = 2 - 0 = 2Updating y: y -= 0 means y = y - 0So, y = 2 - 0 = 2.print(x, y)The final values of the variables are:x = 0y = 2Hence, the output of the program is:0 2

Question 13

Question 9(c)Find the output of the following code:a=5       
b=2*a         
a+=a+b        
b*=a+b        
print (a,b)

Accepted Answer

Output20 300
Explanationa = 5
b = 2 * aa is initialized to 5.b is set to 2 * a, which means b = 2 * 5 = 10.a += a + bThe += operator adds the value on the right to a and assigns the result back to a.Current values are:a = 5b = 10Calculation: a + b = 5 + 10 = 15Updating a: a += 15 means a = a + 15So, a = 5 + 15 = 20.b *= a + bThe *= operator multiplies b by the value on the right and assigns the result back to b.Current values are:a = 20b = 10Calculation: a + b = 20 + 10 = 30Updating b: b *= 30 means b = b * 30So, b = 10 * 30 = 300.print(a, b)The final values of the variables are:a = 20b = 300Hence, the output of the program is:20 300

Question 14

Question 9(d)Find the output of the following code:p=10
q=20
p*=q/3
q+=p+q*2
print (p,q)

Accepted Answer

Output66.66666666666667 126.66666666666667
Explanationp *= q / 3The *= operator multiplies p by the value on the right and assigns it to p again.First, compute the division: q / 3 = 20 / 3 ≈ 6.6667p *= 6.6667 means p = p * 6.6667So, p = 10 * 6.6667 = 66.6667q += p + q * 2The += operator adds the value on the right to q and assigns it to q again.First, compute q * 2 = 20 * 2 = 40Then add values: p + q * 2 = 66.6667 + 40Finally, add it to q: q += 106.6667 means q = q + 106.6667So, q = 20 + 106.6667 = 126.6667print(p, q)The variables now have these final values:p = 66.6667q = 126.6667The precision difference is due to floating-point arithmetic. For simplicity of explanation we have taken lesser precision values.

Question 15

Question 9(e)Find the output of the following code:p = 5 % 2
q = p ** 4
r = p // q
p+= p + q + r
r+= p + q + r
q-= p + q * r
print(p, q, r)

Accepted Answer

Output4 -10 7
Explanationp = 5 % 2The modulo % operator calculates the remainder of the division.5 % 2 = 1Thus, p = 1q = p ** 4The exponent ** operator raises p to the power of 4.1 ** 4 = 1Thus, q = 1r = p // qThe floor division // operator divides and returns the integer quotient of the division.1 // 1 = 1Thus, r = 1p += p + q + rThe += operator adds the value on the right to the variable and assigns it to the variable again.Initially, p = 1Calculation inside the parentheses: (p + q + r) = 1 + 1 + 1 = 3p += 3 means p = p + 3So, p = 1 + 3 = 4r += p + q + rThe += operator adds the value on the right to the variable and assigns it to the variable again.Initially, r = 1Calculation inside the parentheses: (p + q + r) = 4 + 1 + 1 = 6r += 6 means r = r + 6So, r = 1 + 6 = 7q -= p + q * rThe -= operator subtracts the value on the right from the variable and assigns it to the variable again.Initially, q = 1Calculation inside the parentheses: (p + q * r) = 4 + 1 * 7 = 4 + 7 = 11q -= 11 means q = q - 11So, q = 1 - 11 = -10print(p, q, r)The variables now have these final values:p = 4q = -10r = 7Hence, the output of the program is:4 -10 7

Question 16

Question 9(f)Find the output of the following code:p = 21 // 5
q = p % 4
r = p * q
p+= p + q - r
r*= p - q + r
q+= p + q
print(p, q, r)

Accepted Answer

Output8 8 0
Explanationp = 21 // 5The floor division // operator divides and returns the integer quotient of the division.( 21 // 5 = 4 )Thus, ( p = 4 )q = p % 4Here, the modulo % operator calculates the remainder of the division.( p % 4 = 4 % 4 = 0 )Thus, ( q = 0 )r = p * qNow it performs a multiplication.p x q = 4 x 0 = 0Thus, r = 0p += p + q - rThe += operator adds the value on the right to the variable and assigns it to the variable again.Initially, ( p = 4 )Calculation inside the parentheses: ( p + q - r = 4 + 0 - 0 = 4 )p += 4 means p = p + 4So, p = 4 + 4 = 8r *= p - q + rThe *= operator multiplies the variable by the value on the right and assigns it to the variable again.Initially, ( r = 0 )Calculation inside the parentheses: ( p - q + r = 8 - 0 + 0 = 8 )r *= 8 means r = r x 8So, r = 0 x 8 = 0q += p + qThe += operator adds the value on the right to the variable and assigns it to the variable again.Initially, q = 0Calculation inside the parentheses: p + q = 8 + 0 = 8q += 8 means q = q + 8So, q = 0 + 8 = 8print(p, q, r)The variables now have these final values:p = 8q = 8r = 0Hence, the output of the program is:8 8 0

Question 17

Question 12What are operators? What is their function? Give examples of some unary and binary operators.

Accepted Answer

Operators are tokens that trigger some computation/action when applied to variables and other objects in an expression. Unary plus (+), Unary minus (-), Bitwise complement (~), Logical negation (not) are a few examples of unary operators. Examples of binary operators are Addition (+), Subtraction (-), Multiplication (*), Division (/).

Question 18

Question 13What is an expression and a statement?

Accepted Answer

An expression is any legal combination of symbols that represents a value. For example, 2.9, a + 5, (3 + 5) / 4.A statement is a programming instruction that does something i.e. some action takes place. For example:print("Hello")a = 15b = a - 10

Question 19

Question 14What all components can a Python program contain?

Accepted Answer

A Python program can contain various components like expressions, statements, comments, functions, blocks and indentation.

Source: This question is from Python Programming Fundamentals, Informatics Practices &mdash; Class 11, CBSE Board.
Key Concepts CoveredThis question tests your understanding of the following concepts from the chapter Python Programming Fundamentals: Question, Components, Python, Program, Contain, Python Programming Fundamentals. These are fundamental topics in Informatics Practices that students are expected to master as part of the CBSE Class 11 curriculum.A thorough understanding of these concepts will help you answer similar questions confidently in your CBSE examinations. These topics are frequently tested in both objective and subjective sections of Informatics Practices papers. We recommend revising the relevant section of your textbook alongside practising these solved examples to build a strong foundation.
How to Approach This QuestionRead the question carefully and identify what is being asked. Break down complex questions into smaller parts. Use the terminology and concepts discussed in this chapter. Structure your answer logically — begin with a definition or key statement, then provide supporting details. Review your answer to ensure it addresses all parts of the question completely.
Key Points to RememberRead the question carefully and identify all parts before answering.
Use the terminology specific to this subject and chapter.
Review the textbook content for this chapter before attempting questions.
Practice writing concise, well-structured answers within time limits.
Related Questions from Python Programming FundamentalsQ1: Question 1 Write a Python command/instruction/statement to display your name.
Q10: Question 9(b) Find the output of the following code: x=-2 y=2 x+=y y-=x print (x,y)
Q11: Question 9(c) Find the output of the following code: a=5 b=2*a a+=a+b b*=a+b print (a,b)
Q12: Question 9(d) Find the output of the following code: p=10 q=20 p*=q/3 q+=p+q*2 print (p,q)
Q13: Question 9(e) Find the output of the following code: p = 5 % 2 q = p ** 4 r = p // q p+= p + q + r...
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Question 20

Question 15What are variables? How are they important for a program?

Accepted Answer

Variables are named labels whose values can be used and processed during program run. Variables are important for a program because they enable a program to process different sets of data.

Source: This question is from Python Programming Fundamentals, Informatics Practices &mdash; Class 11, CBSE Board.
Key Concepts CoveredThis question tests your understanding of the following concepts from the chapter Python Programming Fundamentals: Question, Variables, Important, Program, Python Programming Fundamentals, Informatics Practices. These are fundamental topics in Informatics Practices that students are expected to master as part of the CBSE Class 11 curriculum.A thorough understanding of these concepts will help you answer similar questions confidently in your CBSE examinations. These topics are frequently tested in both objective and subjective sections of Informatics Practices papers. We recommend revising the relevant section of your textbook alongside practising these solved examples to build a strong foundation.
How to Approach This QuestionRead the question carefully and identify what is being asked. Break down complex questions into smaller parts. Use the terminology and concepts discussed in this chapter. Structure your answer logically — begin with a definition or key statement, then provide supporting details. Review your answer to ensure it addresses all parts of the question completely.
Key Points to RememberRead the question carefully and identify all parts before answering.
Use the terminology specific to this subject and chapter.
Review the textbook content for this chapter before attempting questions.
Practice writing concise, well-structured answers within time limits.
Related Questions from Python Programming FundamentalsQ1: Question 1 Write a Python command/instruction/statement to display your name.
Q10: Question 9(b) Find the output of the following code: x=-2 y=2 x+=y y-=x print (x,y)
Q11: Question 9(c) Find the output of the following code: a=5 b=2*a a+=a+b b*=a+b print (a,b)
Q12: Question 9(d) Find the output of the following code: p=10 q=20 p*=q/3 q+=p+q*2 print (p,q)
Q13: Question 9(e) Find the output of the following code: p = 5 % 2 q = p ** 4 r = p // q p+= p + q + r...
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