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Python · Most repeated questions

81 questions · 220 marks · 7 papers · 25 question types

Answer key

Indian Institute of Technology Madras

BS Degree Programme · Examination & Study Paper

Programming in Python

Most repeated questions

Official Paper

Examination Instructions & Guidelines

Solve on notebook/paper first before checking solutions.
MCQ: Exactly 1 option is correct. Negative marking applies.
MSQ: One or more options correct. Select all to score.
NAT: Numerical response. No negative marking.
Scientific calculator allowed for all calculations.
Official answer key is sealed at the end of this sheet.

Type 1 · asked 9 times · Recursion

Trace a function on a target and a list: first output, True or False

Read the passage below, then answer Q1–Q3
Q1MCQ1.5 Marks·Choose one option
End Term · 22 Dec 2024 (AN)Key ↓
1. A
2. B
3. C
4. D
Q2MSQ1.5 Marks·Choose all correct options
End Term · 22 Dec 2024 (AN)Key ↓
1. A
2. B
3. C
4. D
Q3MSQ1 Mark·Choose all correct options
End Term · 22 Dec 2024 (AN)Key ↓
1. A
2. B
3. C
4. D
Read the passage below, then answer Q4–Q6
Q4MCQ1.5 Marks·Choose one option
End Term · 22 Dec 2024 (FN)Key ↓
1. A
2. B
3. C
4. D
Q5MSQ1.5 Marks·Choose all correct options
End Term · 22 Dec 2024 (FN)Key ↓
1. A
2. B
3. C
4. D
Q6MCQ1 Mark·Choose one option
End Term · 22 Dec 2024 (FN)Key ↓
1. A
2. B
3. C
4. D
Read the passage below, then answer Q7–Q9
Q7MCQ1.5 Marks·Choose one option
End Term · 13 Apr 2025 (FN)Key ↓
1. A
2. B
3. C
4. D
Q8MSQ1.5 Marks·Choose all correct options
End Term · 13 Apr 2025 (FN)Key ↓
1. A
2. B
3. C
4. D
Q9MSQ1 Mark·Choose all correct options
End Term · 13 Apr 2025 (FN)Key ↓
1. A
2. B
3. C
4. D

Type 2 · asked 6 times · File handling

Count the lines in a file after a series of writes

Q10MCQ3 Marks·Choose one option
End Term · 13 Apr 2025 (AN)Key ↓
1. A2
2. B3
3. C4
4. D6
Q11NAT3 Marks·Write the number
End Term · 13 Apr 2025 (AN)Key ↓
Your answer:
Q12MCQ3 Marks·Choose one option
End Term · 13 Apr 2025 (FN)Key ↓
1. A2
2. B3
3. C5
4. DIt will give an error
Q13NAT3 Marks·Write the number
End Term · 13 Apr 2025 (FN)Key ↓
Your answer:
Read the passage below, then answer Q14
Consider the below python code.
def create_and_write_file(filename, num_lines):
with open(filename, "w") as f:
for i in range(1, num_lines + 1):
f.write(f"Line {i}\n")
def random_access_read(filename, seek_pos):
with open(filename, "r") as f:
first_chars = f.read(5)
f.seek(seek_pos)
line = f.readline()
rest = f.readlines()
for line in rest:
print(line.strip())
def overwrite_some_text(filename, overwrite_pos, text):
with open(filename, "r+") as f:
f.seek(overwrite_pos)
original = f.readline()
f.seek(overwrite_pos)
f.write(text + "\n")
filename = "example_file.txt"
num_lines = 6
seek_pos = 10
overwrite_pos = 21
overwrite_text = "OVERWRITTEN_TEXT"
create_and_write_file(filename, num_lines)
overwrite_some_text(filename, overwrite_pos, overwrite_text)
Based on the given code snippet answer the given subquestions.
Q14NAT2 Marks·Write the number
End Term · 31 Aug 2025 (AN)Key ↓
On executing the given code, how many number of lines will be there in the file example_file.txt ?
Your answer:
Q15NAT2 Marks·Write the number
End Term · 31 Aug 2025 (FN)Key ↓
Consider the following Python code: with open("data.txt", "w") as f: for i in range(3): for j in range(i + 1): f.write(f"Line {i}-{j}" + ("\n" * (j + 1))) with open("data.txt", "r") as f: count = len(f.readlines()) print(count) What is the output of the given code?
Your answer:

Type 3 · asked 5 times · Tuples & sets

Compute the result of set operations (union, difference, intersection)

Q16NAT3 Marks·Write the number
End Term · 13 Apr 2025 (AN)Key ↓
Your answer:
Read the passage below, then answer Q17–Q19
Consider the below python code.
def categorize_numbers(numbers):
categories = {
"cat_1": set(),
"cat_2": set(),
"cat_3": set()
}
def check(n):
if n % 5 == 0:
return True
return False
for num in numbers:
if num % 2 == 0:
categories["cat_1"].add(num)
else:
categories["cat_2"].add(num)
if check(num):
categories["cat_3"].add(num)
return categories
result = categorize_numbers([
2, 3, 4, 2, 5, 6, 3, 2, 7, 8,
9, 10, 5, 4, 7, 8, 3, 10, 2
])
Based on the given code snippet answer the given subquestions.
Q17MCQ2 Marks·Choose one option
End Term · 31 Aug 2025 (AN)Key ↓
What will be the value of the following expression after running the given code snippet? sorted(result["cat_1"] & result["cat_3"])
1. A[10]
2. B[5]
3. C[2, 4, 5, 6, 8, 10]
4. D[5, 10]
Q18NAT2 Marks·Write the number
End Term · 31 Aug 2025 (AN)Key ↓
What will be the value of the following expression after running the given code snippet? len(result["cat_1"] | result["cat_2"] | result["cat_3"])
Your answer:
Q19MSQ2 Marks·Choose all correct options
End Term · 31 Aug 2025 (AN)Key ↓
If result = categorize_numbers([1, 2, 10, 15, 20]) , which of the following expression(s) would be evaluated as _(True) ?
1. Aresult == { 'cat_1': {2, 10, 20}, 'cat_2': {1, 15}, 'cat_3': {10, 20, 15} }
2. Blen(result["cat_1"] & result["cat_3"]) == 2
3. Clen(result["cat_1"] & result["cat_2"]) == 5
4. D(result["cat_1"] & result["cat_2"] | result["cat_3"]) == {10,20,15}
Useful Reference Data for this Paper
Useful Information
NAT → integer
For all NAT questions in this exam, the answer will always be an integer and not a float value. If the answer to a question is 18, then just enter that value. Do not enter 18.0
Q20NAT3 Marks·Write the number
Quiz 1 · 26 Oct 2025 (AN)Key ↓
Consider the following Python code: P = {1, 2, 3, 4} Q = {3, 4, 5, 6} R = {4, 5, 6, 7} S = {2, 4, 6, 8} result = ((P | Q) - R) & S print(result) How many elements will be present in result?
Your answer:

Type 4 · asked 4 times · Conditionals (if-elif-else)

Trace a nested if-elif-else with a flag variable for a given input

Q21MCQ3 Marks·Choose one option
End Term · 22 Dec 2024 (AN)Key ↓
1. A
2. B
3. C
4. D
Q22MCQ3 Marks·Choose one option
End Term · 22 Dec 2024 (FN)Key ↓
1. A
2. B
3. C
4. D
Q23MSQ3 Marks·Choose all correct options
End Term · 13 Apr 2025 (AN)Key ↓
1. A
2. B
3. C
4. D
Q24MSQ3 Marks·Choose all correct options
End Term · 13 Apr 2025 (FN)Key ↓
1. A
2. B
3. C
4. D

Type 5 · asked 4 times · Exception handling

Trace try/except/finally to find the final result value

Q25NAT3 Marks·Write the number
End Term · 22 Dec 2024 (AN)Key ↓
Your answer:
Q26NAT3 Marks·Write the number
End Term · 22 Dec 2024 (FN)Key ↓
Your answer:
Q27MCQ3 Marks·Choose one option
End Term · 31 Aug 2025 (AN)Key ↓
Given the following code snippet, what will be the output? def get_square(items, i): return items[i]**2 def safe_get_square(items,i): try: return get_square(items,i) except IndexError: return 0 except: return -1 nums = [5, -2, 3] print(safe_get_square(nums , 1)) print(safe_get_square(nums , -1)) print(safe_get_square([] , -1)) print(safe_get_square(None , 1))
1. A25 0 -1 -1
2. B4 4 -1 -1
3. C4 9 -1 -1
4. D4 9 0 -1
Q28MSQ3 Marks·Choose all correct options
End Term · 31 Aug 2025 (FN)Key ↓
Which of the following statements about the exception handling behavior are TRUE? Select ALL that apply. def safe_divide(x, y): result = [] try: result.append("Trying division") result.append(x // y) except ZeroDivisionError: result.append("Division by zero") else: result.append("No exception occurred") finally: result.append("Cleanup done") return result output = safe_divide(10, 0) print(output)
1. AThe output will contain the string _("Trying division")
2. BThe string _("Division by zero") will appear in the output
3. CThe division result will be appended to the output
4. DThe string _("Cleanup done") will always appear regardless of exceptions

Type 6 · asked 4 times · Comprehensions, map & lambda

Pick snippets that build a list of squares/cubes of even or odd numbers

Q29MSQ3 Marks·Choose all correct options
End Term · 22 Dec 2024 (AN)Key ↓
1. A
2. B
3. C
4. D
5. E
Q30MSQ3 Marks·Choose all correct options
End Term · 22 Dec 2024 (FN)Key ↓
1. A
2. B
3. C
4. D
5. E
Q31MSQ3 Marks·Choose all correct options
End Term · 13 Apr 2025 (AN)Key ↓
1. A
2. B
3. C
4. D
Q32MSQ3 Marks·Choose all correct options
End Term · 31 Aug 2025 (FN)Key ↓
Consider the use of the _(map()) function in the following code snippets. Select all options that has the value _([4, 9, 16, 25]) in the variable _(squares) after execution.
1. Anums = [2, 3, 4, 5] squares = list(map(lambda x: x**2, nums))
2. Bnums = [4, 9, 16, 25] squares = map(int, nums)
3. Cnums = [2, 3, 4, 5] def square(n): return n * n squares = list(map(square, nums))
4. Dnums = [2, 3, 4, 5] squares = [] for x in nums: squares.append(x ** 2)
5. Enums = [2, 3, 4, 5] squares = list(map(pow, nums, [2]*4))

Type 7 · asked 4 times · Functions & scope

Trace an algorithm on a list and a target value (return value or None)

Read the passage below, then answer Q33–Q34
Q33MCQ1.5 Marks·Choose one option
End Term · 22 Dec 2024 (AN)Key ↓
1. A
2. B
3. C
4. D
Q34MCQ1.5 Marks·Choose one option
End Term · 22 Dec 2024 (AN)Key ↓
1. A
2. B
3. C
4. D
Read the passage below, then answer Q35–Q36
Q35MCQ2 Marks·Choose one option
End Term · 22 Dec 2024 (FN)Key ↓
1. A
2. B
3. C
4. D
Q36MCQ2 Marks·Choose one option
End Term · 22 Dec 2024 (FN)Key ↓
1. A
2. B
3. C
4. D

Type 8 · asked 4 times · Classes, objects & inheritance

Predict the output when a subclass overrides a parent method

Q37MCQ3 Marks·Choose one option
End Term · 22 Dec 2024 (FN)Key ↓
1. A
2. B
3. C
4. D
Q38MCQ3 Marks·Choose one option
End Term · 31 Aug 2025 (AN)Key ↓
Consider the following snippet of code: class Shape: def __init__(self): pass def area(self): return "Area not defined" def describe(self): return f"I am a shape. Area: {self.area()}" class Rectangle(Shape): def __init__(self, width, height): self.width = width self.height = height def area(self): return self.width * self.height class Circle(Shape): def __init__(self, radius): self.radius = radius r = Rectangle(4, 5) c = Circle(3) print(r.describe()) print(c.describe()) What will be the output?
1. AI am a shape. Area: 20 I am a shape. Area: Area not defined
2. BI am a shape. Area: Area not defined I am a shape. Area: Area not defined
3. CAttributeError: 'Rectangle' object has no attribute 'describe'
4. DNameError: describe is not defined
5. EI am a shape. Area: 20 I am a shape. Area: 28.26
Q39NAT3 Marks·Write the number
End Term · 31 Aug 2025 (AN)Key ↓
Consider the below python code. class A: def __init__(self): self.value = 5 def add(self, num): self.value += num return self.value class B(A): def __init__(self): super().__init__() self.value *= 2 def add(self, num): return super().add(num * 2) obj = B() result = obj.add(3) print(result) What will be the output of the given code?
Your answer:
Q40MCQ3 Marks·Choose one option
End Term · 31 Aug 2025 (FN)Key ↓
Consider the following Python code: class Employee: def __init__(self, name): self.name = name self.role = "Employee" def show_details(self): print(f"{self.name} works as {self.role}") class Developer(Employee): def __init__(self, name): super().__init__(name) self.role = "Developer" def show_details(self): print(f"{self.name} writes code as a {self.role}") super().show_details() class Manager(Employee): def __init__(self, name): super().__init__(name) self.role = "Manager" def show_details(self): print(f"{self.name} manages tasks as a {self.role}") super().show_details() employees = [ Developer("Ananya"), Manager("Rajeev"), Developer("Kiran") ] for emp in employees: emp.show_details() What will be the output of the code above?
1. AAnanya writes code as a Developer Ananya works as Developer Rajeev manages tasks as a Manager Rajeev works as Manager Kiran writes code as a Developer Kiran works as Developer
2. BAnanya writes code as a Developer Ananya works as Employee Rajeev manages tasks as a Manager Rajeev works as Employee Kiran writes code as a Developer Kiran works as Employee
3. CAnanya works as Developer Rajeev works as Manager Kiran works as Developer
4. DDeveloper Employee Manager Employee Developer Employee

Type 9 · asked 4 times · Tuples & sets

Trace tuple concatenation, slicing and membership

Q41MSQ3 Marks·Choose all correct options
End Term · 22 Dec 2024 (AN)Key ↓
1. A
2. B
3. C
4. D
Q42MCQ3 Marks·Choose one option
End Term · 31 Aug 2025 (AN)Key ↓
Given the following code snippet, what will be the output? a = (1, 2) b = (3, 4) c = ((5, 6),) d = a + b + c e = d[2:] f = d[:2] + (e[2],) print(f)
1. A(3, 4, (5, 6))
2. B(3, 4, 5, 6)
3. C(1, 2, (5, 6))
4. D(1, 2, 5, 6)
Q43MSQ3 Marks·Choose all correct options
End Term · 31 Aug 2025 (AN)Key ↓
Consider the following snippet of code: t1 = (1, 2, 3) t2 = (4, 5, 6) t3 = t1 + t2 t4 = (t1, t2) print(t3[2:5]) print(len(t4)) print(5 in t2) try: t1[0] = 10 except: t1 = t3[0] print(t1) Select all that apply.
1. AThe First Line of output is _((3, 4, 5, 6))
2. BThe First Line of output is _((3, 4, 5))
3. CThe Second Line of output is _2
4. DThe Third Line of output is _(True)
5. EThe Fourth Line of output is _3
Q44NAT3 Marks·Write the number
End Term · 31 Aug 2025 (FN)Key ↓
Consider the following Python code: a1 = (3, 6, 9, 12, 15, 18, 21, 24) a2 = a1[2:7] a3 = a2[::-1] a4 = tuple(x for x in a3 if x % 6 != 0) a5 = a4[1::2] ans = sum(a5) + len(a4) print(ans) What is the output of the given code?
Your answer:

Type 10 · asked 3 times · Classes, objects & inheritance

Output after updating and appending to a list attribute in a class

Q45MCQ3 Marks·Choose one option
End Term · 22 Dec 2024 (AN)Key ↓
1. A
2. B
3. C
4. D
Q46MCQ3 Marks·Choose one option
End Term · 13 Apr 2025 (AN)Key ↓
1. A
2. B
3. C
4. D
Q47MCQ3 Marks·Choose one option
End Term · 13 Apr 2025 (FN)Key ↓
1. A
2. B
3. C
4. D

Type 11 · asked 3 times · Lists, slicing & matrices

Build a list by adding slices in a while loop

Q48NAT3 Marks·Write the number
End Term · 22 Dec 2024 (AN)Key ↓
Your answer:
Q49NAT3 Marks·Write the number
End Term · 22 Dec 2024 (FN)Key ↓
Your answer:
Q50NAT3 Marks·Write the number
End Term · 13 Apr 2025 (FN)Key ↓
Your answer:

Type 12 · asked 3 times · Classes, objects & inheritance

Count instances using a class-level counter variable

Read the passage below, then answer Q51
Based on the below data answer the given subquestions.
Q51MCQ1.5 Marks·Choose one option
End Term · 13 Apr 2025 (AN)Key ↓
1. A1
2. B2
3. C3
4. DCannot be determined
Read the passage below, then answer Q52
Based on the above data, answer the given subquestions.
Q52NAT1.5 Marks·Write the number
End Term · 13 Apr 2025 (FN)Key ↓
If the below main code is executed after the class definition, what will be the output?
Your answer:
Read the passage below, then answer Q53
Consider the following Python code and answer the sub-questions:
class Vehicle:
total_vehicles = 0
all_models = []
def __init__(self, model):
self.model = model
Vehicle.total_vehicles += 1
Vehicle.all_models.append(model)
def get_info(self):
return "Model: " + self.model
def get_total():
return Vehicle.total_vehicles
def count_models_starting_with(letter):
count = 0
for m in Vehicle.all_models:
if m.startswith(letter):
count += 1
return count
class ElectricVehicle(Vehicle):
ev_count = 0
def __init__(self, model, battery):
Vehicle.__init__(self, model)
self.battery = battery
ElectricVehicle.ev_count += 1
if battery < 40:
self.status = "Low"
else:
self.status = "OK"
def get_info(self):
return (
f"{Vehicle.get_info(self)}, "
f"Battery: {self.battery})%, "
f"Status: {self.status}"
)
class PetrolVehicle(Vehicle):
pv_count = 0
def __init__(self, model, fuel):
Vehicle.__init__(self, model)
self.fuel = fuel
PetrolVehicle.pv_count += 1
def get_info(self):
return f"{Vehicle.get_info(self)}, Fuel: {self.fuel} L"
fleet = [
ElectricVehicle("Tesla Model 3", 75),
ElectricVehicle("Mahindra e2o", 35),
PetrolVehicle("Hyundai i10", 20),
PetrolVehicle("Swift", 12),
ElectricVehicle("Tata Tigor EV", 80),
Vehicle("Generic Cycle")
]
low_battery_models = []
for v in fleet:
if isinstance(v, ElectricVehicle):
if v.status == "Low":
low_battery_models.append(v.model)
count = 0
for v in fleet:
if isinstance(v, Vehicle):
count += 1
print(count)
Q53NAT2 Marks·Write the number
End Term · 31 Aug 2025 (FN)Key ↓
What will the output of the given code?
Your answer:

Type 13 · asked 3 times · Loops: while, for & nested loops

Count lines printed by nested loops

Q54NAT3 Marks·Write the number
End Term · 13 Apr 2025 (FN)Key ↓
Your answer:
Useful Reference Data for this Paper
Useful Information
NAT → integer
For all NAT questions in this exam, the answer will always be an integer and not a float value. If the answer to a question is 18, then just enter that value. Do not enter 18.0
Q55NAT4 Marks·Write the number
Quiz 1 · 26 Oct 2025 (AN)Key ↓
Consider the following Python code: for i in range(1, 6): for j in range(1, 6): for k in range(1, 2): if i == j: print("-") else: print("*", end=" ") print("+") How many lines will be printed when this code is executed?
Your answer:
Q56NAT3 Marks·Write the number
Quiz 1 · 26 Oct 2025 (AN)Key ↓
Consider the following Python code: for i in range(1, 5): for j in range(1, 5): if j == 3: break if i == 2: continue print(i, j) How many lines will be printed when this code is executed?
Your answer:

Type 14 · asked 3 times · Lists, slicing & matrices

Trace a function that transforms a nested list (matrix)

Q57NAT3 Marks·Write the number
End Term · 13 Apr 2025 (FN)Key ↓
Your answer:
Useful Reference Data for this Paper
Useful Information
NAT → integer
For all NAT questions in this exam, the answer will always be an integer and not a float value. If the answer to a question is 18, then just enter that value. Do not enter 18.0
Read the passage below, then answer Q58–Q59
Consider the following code:
def flipper(matrix):
transformed = []
for row in matrix:
new_row = []
for element in row:
if element < 0:
new_row.append(0)
elif element % 2 == 0:
new_row.append(element * 2)
else:
new_row.append(element * 3)
transformed.append(new_row)
result = [
val
for sub in transformed
for val in sub
if val > 5
]
return transformed, result
matrix = [[1, -2, 3], [4, 5, -6], [7, 8]]
out1, out2 = flipper(matrix)
print(out1)
print(out2)
Answer the subquestions based on the given data.
Q58MCQ4 Marks·Choose one option
Quiz 1 · 26 Oct 2025 (AN)Key ↓
What is the value of _(out1) after executing the code?
1. A[[1, -4, 9], [8, 15, -12], [21, 16]]
2. B[[3, 0, 9], [8, 15, 0], [21, 16]]
3. C[[3, 0, 9], [4, 15, 0], [21, 16]]
4. D[[1, 0, 3], [8, 15, 0], [21, 16]]
Q59MCQ4 Marks·Choose one option
Quiz 1 · 26 Oct 2025 (AN)Key ↓
What is the value of _(out2) after executing the code?
1. A[3, 9, 8, 15, 21, 16]
2. B[9, 8, 15, 21, 16]
3. C[8, 15, 21, 16]
4. D[3, 0, 9, 8, 15, 0, 21, 16]

Type 15 · asked 2 times · Conditionals (if-elif-else)

Pick the snippet(s) that map a number range to the right category

Q60MCQ3 Marks·Choose one option
End Term · 13 Apr 2025 (AN)Key ↓
1. AOnly Snippet-1 is correct
2. BOnly Snippet-2 is correct
3. CBoth Snippet-1 and Snippet-2 are correct
4. DBoth Snippet-1 and Snippet-2 are incorrect
Q61MCQ3 Marks·Choose one option
End Term · 13 Apr 2025 (FN)Key ↓
1. A
2. B
3. C
4. D

Type 16 · asked 2 times · Loops: while, for & nested loops

Find the best pair from a list using two nested loops

Q62MCQ3 Marks·Choose one option
End Term · 22 Dec 2024 (AN)Key ↓
1. A
2. B
3. C
4. D
Q63MCQ3 Marks·Choose one option
End Term · 13 Apr 2025 (FN)Key ↓
1. A
2. B
3. C
4. D

Type 17 · asked 2 times · File handling

What a file holds after writing in 'w' mode (overwrite)

Q64MCQ3 Marks·Choose one option
End Term · 22 Dec 2024 (AN)Key ↓
1. AAn empty file
2. BA file with three lines of student data
3. CA file with student names only
4. DA file with student grades only
Q65MCQ3 Marks·Choose one option
End Term · 22 Dec 2024 (FN)Key ↓
1. A
2. B
3. C
4. D

Type 18 · asked 2 times · File handling

Read a CSV file and compute an average for filtered rows

Q66NAT4 Marks·Write the number
End Term · 22 Dec 2024 (AN)Key ↓
Your answer:
Q67NAT3 Marks·Write the number
End Term · 22 Dec 2024 (FN)Key ↓
Your answer:

Type 19 · asked 2 times · Expressions, types & strings

Find the length of a string built from slices

Q68NAT3 Marks·Write the number
End Term · 22 Dec 2024 (AN)Key ↓
Your answer:
Q69NAT3 Marks·Write the number
End Term · 22 Dec 2024 (FN)Key ↓
Your answer:

Type 20 · asked 2 times · Loops: while, for & nested loops

Count while-loop steps when a value is divided or multiplied

Q70NAT3 Marks·Write the number
End Term · 22 Dec 2024 (AN)Key ↓
Your answer:
Q71NAT3 Marks·Write the number
End Term · 22 Dec 2024 (FN)Key ↓
Your answer:

Type 21 · asked 2 times · Expressions, types & strings

Describe what a character-by-character string function does

Q72MSQ3 Marks·Choose all correct options
End Term · 22 Dec 2024 (AN)Key ↓
1. A
2. B
3. C
4. D
Q73MCQ3 Marks·Choose one option
End Term · 13 Apr 2025 (AN)Key ↓
1. AIt converts all vowels to uppercase and consonants to lowercase while leaving digits unchanged.
2. BIt reverses the order of characters in the string while converting all letters to lowercase.
3. CIt removes all non-alphabetic characters and alternates uppercase and lowercase letters in the remaining string.
4. DIt alternates the case of alphabetical characters based on their position, starting with uppercase at index 0, leaving non-alphabetic characters unchanged.

Type 22 · asked 2 times · Tuples & sets

Trace a while loop that reassigns tuples or sets; which one has X

Q74MCQ3 Marks·Choose one option
End Term · 13 Apr 2025 (AN)Key ↓
1. AOnly A
2. BOnly B
3. COnly C
4. DA and C
Q75MCQ3 Marks·Choose one option
End Term · 13 Apr 2025 (FN)Key ↓
1. AOnly X
2. BOnly Y
3. COnly Z
4. DX and Z

Type 23 · asked 2 times · Recursion

Trace recursion that takes the first and last items (lst[1:-1])

Q76NAT4 Marks·Write the number
End Term · 13 Apr 2025 (AN)Key ↓
Your answer:
Q77NAT4 Marks·Write the number
End Term · 13 Apr 2025 (FN)Key ↓
Your answer:

Type 24 · asked 2 times · Dictionaries

Use a character-frequency dict to find which strings return True

Q78MSQ3 Marks·Choose all correct options
End Term · 13 Apr 2025 (AN)Key ↓
1. A"taco cat"
2. B"civic room"
3. C"racecar"
4. D"level up"
Q79MSQ3 Marks·Choose all correct options
End Term · 13 Apr 2025 (FN)Key ↓
1. A"debitcard", "badcredit"
2. B"admirer", "married"
3. C"schoolmaster", "theclassroom"
4. D"aabbcc", "abcabc"

Type 25 · asked 2 times · Expressions, types & strings

Evaluate truthiness of None, 0 and empty string in conditions

Q80MCQ3 Marks·Choose one option
End Term · 31 Aug 2025 (AN)Key ↓
Given the following code snippet, what will be the output? if None: print("None is True") elif 0: print("0 is True") elif "": print("Empty string is True") else: print("All False")
1. ANone is True
2. B0 is True
3. CEmpty string is True
4. DAll False
Useful Reference Data for this Paper
Useful Information
NAT → integer
For all NAT questions in this exam, the answer will always be an integer and not a float value. If the answer to a question is 18, then just enter that value. Do not enter 18.0
Q81MCQ3 Marks·Choose one option
Quiz 1 · 26 Oct 2025 (AN)Key ↓
Consider the following Python code. What will be the output? x, y, z = "", "python", 0 print((x or y) and (z or len(y)))
1. A6
2. B""
3. C"python"
4. D0
5. ETrue

Official Key

Master Answer Key & Explanations

Official answer keys from IIT Madras BS past papers. Click any question to review.

Reveal Key

Q1C

Q2A, B

Q3A, C

Q4B

Q5A, B

Q6A

Q7C

Q8A, B

Q9A, B, D

Q10C

Q116

Q12A

Q135

Q145

Q1510

Q1646

Q17A

Q189

Q19A, B, D

Q201

Q21D

Q22C

Q23B, C, D

Q24A, C

Q259

Q261

Q27D

Q28A, B, D

Q29B, E

Q30A, B, E

Q31B, C, D

Q32A, C, D, E

Q33C

Q34B

Q35A

Q36D

Q37C

Q38A

Q3916

Q40A

Q41A, B, C

Q42C

Q43B, C, D

Q4418

Q45B

Q46B

Q47C

Q484

Q495

Q5020

Q51B

Q523

Q536

Q5410

Q5510

Q566

Q5732

Q58B

Q59B

Q60D

Q61A

Q62C

Q63C

Q64B

Q65B

Q6688

Q6776000

Q6818

Q698

Q706

Q713

Q72A, B, C

Q73D

Q74D

Q75B

Q764

Q7739

Q78A, C

Q79A, B, D

Q80D

Q81A

Questions and answer keys are reproduced from the official IIT Madras BS papers. Topics and repeated question types are BTechi’s own grouping. BTechi is not affiliated with IIT Madras.