Question 1

Question 1Assertion (A): When a set of statements is indented under the same block, starting from the same indentation, it is said to be a compound statement.Reasoning (R): Compound Statement begins with a header ending with a colon (:) sign and the statements under the same indentation are marked as a block.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.ExplanationA compound statement in Python is formed when multiple statements are grouped together under the same block of indentation. The header line begins with a keyword and ends with a colon (:). Subsequent statements that are indented under the same level are considered part of the block.

Question 2

Question 2Assertion (A): The conditional flow of control is implemented using if statement.Reasoning (R): A statement or statements (block of code) are indented (usually 4 spaces) inside the if statement and are executed only if the condition evaluates to true, otherwise they are ignored.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.ExplanationThe if statement in Python allows conditional flow of control. It evaluates a condition and executes one or more statements based on whether the condition is true or false. If the condition evaluates to true, the statement block following the if statement (indented code) gets executed, otherwise, if the condition is false, that block is skipped, and the program continues with the next statement after the if block.

Question 3

Question 6Assertion (A): The range() method is used with both for and while loops.Reasoning (R): By default, the values for start and step are 0 (zero) and 1 (one), respectively.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 false but R is true.ExplanationThe range() function is used with for loops to iterate over a sequence of numbers, not with while loops. By default, the values for start and step are 0 (zero) and 1 (one), respectively.

Question 4

Question 3Find error in the following code (if any) and correct it by rewriting the code and underline the corrections:code=input ("Enter season code : ")
if code=w:
   print "winter season" 
elif code==r:
   PRINT "rainy season" 
else:
   Print "summer season"

Accepted Answer

code = input("Enter season code : ")
if code=w: #Error 1
   print "winter season" #Error 2
elif code==r: #Error 3
   PRINT "rainy season" #Error 4 
else:
   Print "summer season" # Error 5Error 1 — The assignment operator '=' is used instead of equality operator '==' in the if statement and the string 'w' should be enclosed in quotes.Error 2 — Parentheses around the print statement are missing.Error 3 — String 'r' should be enclosed in quotes.Error 4 — The print statement should be in lowercase letters and there should be parentheses around the print statement.Error 5 — The print statement should be in lowercase letters and there should be parentheses around the print statement.The corrected code is :code = input("Enter season code: ")
if code == "w":
   print("winter season") 
elif code == "r":  
   print("rainy season") 
else:
   print("summer season")

Question 5

Question 4(a)Give the output of the following when num1 = 4, num2 = 3, num3 = 2.num1 += num2 + num3
print(num1)

Accepted Answer

Output9
ExplanationIn the above code, num1 += num2 + num3 is a shorthand notation for num1 = num1 + num2 + num3.Given,num1 = 4
num2 = 3
num3 = 2
First, the expression num2 + num3 is evaluated:num2 + num3 = 3 + 2 = 5
Now the expression becomes:num1 = num1 + 5
which translates to:num1 = 4 + 5 = 9

Question 6

Question 4(b)Give the output of the following when num1 = 4, num2 = 3, num3 = 2.num1 = num1 ** (num2 + num3)
print (num1)

Accepted Answer

Output1024
ExplanationIn the given code, num1 = num1 ** (num2 + num3) calculates the result of raising num1 to the power of the sum of num2 and num3. The expression becomes 4 ** (3 + 2), which simplifies to 4 ** 5. Evaluating 4 ** 5 results in 1024, so the output of print(num1) is 1024.

Question 7

Question 4(d)Give the output of the following when num1 = 4, num2 = 3, num3 = 2.num1 = '5' + '5'
print (num1)

Accepted Answer

Output55
ExplanationThe expression '5' + '5' performs string concatenation as they are enclosed in quotes. Therefore, '5' and '5' are concatenated to form the string '55', which is then assigned to num1. The print(num1) statement outputs the string '55'.

Question 8

Question 4(e)Give the output of the following when num1 = 4, num2 = 3, num3 = 2.print(4.00 / (2.0+2.0))

Accepted Answer

Output1.0
Explanation1. Evaluate the expression inside the parentheses first:2.0 + 2.0This calculation is straightforward:2.0 + 2.0 = 4.02. Perform the division operation:4.00 / 4.0 = 1.03. Print the result:print(1.0)Therefore, the output of the given code snippet is:1.0

Question 9

Question 4(f)Give the output of the following when num1 = 4, num2 = 3, num3 = 2.num1 = 2 + 9 * ((3*12)-8)/10
print(num1)

Accepted Answer

Output27.2
Explanationnum1 = 2 + 9 * ((3*12)-8)/10Let's calculate this step by step, following the precedence of operators in Python:1. Evaluate the innermost parentheses first:3 * 12 = 362. Replace and continue evaluating inside the parentheses:((3*12)-8) => (36 - 8) = 283. Now, evaluate the multiplication and division:9 * 28 = 2524. Continue with dividing by 10:252 / 10 = 25.25. Finally, add 2:2 + 25.2 = 27.2The print(num1) statement outputs 27.2

Question 10

Question 4(g)Give the output of the following when num1 = 4, num2 = 3, num3 = 2.num1 = float(10)
print(num1)

Accepted Answer

Output10.0
ExplanationThe float(10) function converts the integer 10 to the floating-point number 10.0. Therefore, num1 is assigned the value 10.0.

Question 11

Question 4(h)Give the output of the following when num1 = 4, num2 = 3, num3 = 2.num1 = int('3.14')
print(num1)

Accepted Answer

The code will raise a Error because we cannot convert the string '3.14' to an integer directly using int() function in Python due to the presence of a decimal point. Python expects the string to represent a whole number when converting to an integer.

Question 12

Question 4(i)Give the output of the following:print (10 != 9 and 20 >= 20)

Accepted Answer

OutputTrue
ExplanationThe expression 10 != 9 and 20 >= 20 evaluates to True because both conditions separated by the and operator are true. Specifically, 10 != 9 is true because 10 is not equal to 9, and 20 >= 20 is true because 20 is equal to 20.

Question 13

Question 4(j)Give the output of the following:print(5 % 10 + 10 < 50 and 29 <= 29)

Accepted Answer

OutputTrue
ExplanationIn the expression 5 % 10 + 10 < 50 and 29 <= 29, according to operator precedence, 5 % 10 calculates to 5, then 5 + 10 equals 15. Next, 15 < 50 evaluates to True. Separately, 29 <= 29 also evaluates to True. The and operator then combines these results. Since both conditions are True, the and operator yields True, which is printed.

Question 14

Question 5What is the difference between else and elif constructs of if statement?

Accepted Answer

The else statement is a default condition that executes when the preceding if and elif (if any) conditions evaluate to False. It does not take any conditions and is written simply as else:, followed by an indented block of code. On the other hand, elif is used to check additional conditions after the initial if statement. If the if condition is False, Python evaluates the elif condition. It is followed by a condition and ends with a colon (:), followed by a block of code.

Question 15

Question 6(a)Find the output of the following program segment:for i in range(20, 30, 2):                        
   print(i)

Accepted Answer

Output20
22
24
26
28
ExplanationBelow is a detailed explanation of this code:range(20, 30, 2): This generates a sequence of numbers starting from 20 (inclusive) up to but not including 30 (exclusive), incrementing by 2 each time.The general form of the range function is range(start, stop, step),where:start is the starting number of the sequence.stop is the endpoint (the number is not included in the sequence).step specifies the increment between each number in the sequence.for i in range(20, 30, 2):: The for loop iterates over each number generated by the range function and assigns it to the variable i during each iteration.print(i): This prints the current value of i for each iteration.Let's list the numbers generated by range(20, 30, 2):Start at 20.Increment by 2: 20 + 2 = 22.Increment by 2: 22 + 2 = 24.Increment by 2: 24 + 2 = 26.Increment by 2: 26 + 2 = 28.The next increment would be 28 + 2 = 30, but 30 is not included as the stop parameter is exclusive of the value.Therefore, the sequence of numbers is: 20, 22, 24, 26, 28.

Question 16

Question 6(b)Find the output of the following program segment:country = 'INDIA'
for i in country:
   print (i)

Accepted Answer

OutputI
N
D
I
A
ExplanationHere's the detailed explanation:1. String Assignment:country = 'INDIA'This line assigns the string 'INDIA' to the variable country.2. for i in country:: The for loop iterates over each character in the string country. The variable i will take on the value of each character in the string one at a time.3. print(i): This prints the current character stored in the variable i for each iteration.Let’s analyze the loop iteration by iteration:In the first iteration, i is 'I', so print(i) outputs: I.In the second iteration, i is 'N', so print(i) outputs: N.In the third iteration, i is 'D', so print(i) outputs: D.In the fourth iteration, i is 'I', so print(i) outputs: I.In the fifth iteration, i is 'A', so print(i) outputs: A.Putting it all together, the output will be each character of the string 'INDIA' printed on a new line:I
N
D
I
A

Question 17

Question 6(c)Find the output of the following program segment:i = 0; sum = 0
while i < 9:
      if i % 4 == 0:
         sum = sum + i
      i = i + 2
print (sum)

Accepted Answer

Output12
ExplanationLet's break down the code step-by-step:1. Initial Assignments:i = 0
sum = 0
Two variables are initialized: i is set to 0, and sum is set to 0.2. while i < 9: → This loop continues to execute as long as i is less than 9.3. Inside the while loop:First iteration (i = 0):if i % 4 == 0: → 0 % 4 equals 0, so the condition is true.sum = sum + i → sum is updated to sum + 0, which is 0 + 0 = 0.i = i + 2 → i is updated to 0 + 2 = 2.Second iteration (i = 2):if i % 4 == 0: → 2 % 4 equals 2, so the condition is false.The value of sum remains unchanged.i = i + 2 → i is updated to 2 + 2 = 4.Third iteration (i = 4):if i % 4 == 0: → 4 % 4 equals 0, so the condition is true.sum = sum + i → sum is updated to sum + 4, which is 0 + 4 = 4.i = i + 2 → i is updated to 4 + 2 = 6.Fourth iteration (i = 6):if i % 4 == 0: → 6 % 4 equals 2, so the condition is false.The value of sum remains unchanged.i = i + 2 → i is updated to 6 + 2 = 8.Fifth iteration (i = 8):if i % 4 == 0: → 8 % 4 equals 0, so the condition is true.sum = sum + i → sum is updated to sum + 8, which is 4 + 8 = 12.i = i + 2 → i is updated to 8 + 2 = 10.Sixth iteration (i = 10):The loop condition while i < 9: is no longer true (10 is not less than 9), so the loop terminates.4. print(sum) → After exiting the loop, the value of sum is printed.Summarizing all updates to sum:After the first iteration, sum = 0.After the third iteration, sum = 4.After the fifth iteration, sum = 12.Therefore, the output of the code is:12

Question 18

Question 7(a)Write the output of the following:for i in '123' :
   print ("Message",i,)

Accepted Answer

OutputMessage 1
Message 2
Message 3
ExplanationThe code uses a for loop to iterate over each character in the string '123'. During each iteration, it prints the string "Message" followed by the current character i.

Question 19

Question 7(b)Write the output of the following:for i in [100,200,300] :
   print (i)

Accepted Answer

Output100
200
300
ExplanationThe above code iterates through each element in the list [100, 200, 300] using a for loop. During each iteration, it prints the current element i.

Question 20

Question 7(c)Write the output of the following:for j in range (10,6,-2) :
   print (j*2)

Accepted Answer

Output20
16
Explanation1. range(10, 6, -2): This generates a sequence of numbers starting from 10 (inclusive) and decreases by 2 each time, stopping before it reaches 6 (exclusive).The general form of the range function is range(start, stop, step), where:start is the starting number of the sequence.stop is the endpoint (the number is not included in the sequence).step specifies the increment (or decrement, if negative) between each number in the sequence.2. The sequence generated by range(10, 6, -2) is:Start at 10.Decrement by 2: 10 - 2 = 8.The next decrement would be 8 - 2 = 6, but 6 is not included as it is exclusive.So, the sequence generated is: 10, 8.3. for j in range(10, 6, -2):: The for loop iterates over each number in the sequence generated by the range function.4. print(j * 2): This prints the value of j multiplied by 2 for each iteration.Let’s analyze the loop iteration by iteration:First iteration (j = 10):print(10 * 2)This prints:20
Second iteration (j = 8):print(8 * 2)This prints:16
Putting it all together, the full output will be:20
16

Conditional and Looping Constructs

Assertions And Reasons

Solutions To Unsolved Questions