Consider: d = {1: 'a', 2: 'b', 3: 'c'}. What is d.get(4, 'default')?

The correct answer is C: 'default'. The get() method returns a value for a key. If the key doesn't exist, it returns the default value provided.

What will be the output of: print({1, 2, 3} | {3, 4, 5})?

The correct answer is B: {1, 2, 3, 4, 5}. The | operator performs set union, combining all unique elements from both sets. Result is {1, 2, 3, 4, 5}.

What will be the output of: 'a' in 'apple'?

The correct answer is A: True. The 'in' operator checks for substring presence. 'a' is in 'apple', so it returns True.

Consider the code: x = (1, 2, 3); x[0] = 5. What happens?

The correct answer is B: TypeError is raised. Tuples are immutable. Attempting to modify a tuple element with x[0] = 5 raises a TypeError: 'tuple' object does not support item assignment.

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Python Programming
Basics & Syntax

Python fundamentals to advanced for interviews

33 Q 2 Topics Take Mock Test

Difficulty: All Easy Medium Hard 11–20 of 33

Topics in Python Programming

All Basics & Syntax 100 Data Types & Lists 19

Q.11 Easy Basics & Syntax

Which of the following is the correct syntax for a Python comment?

A // This is a comment

C # This is a comment

D /* This is a comment */

Correct Answer: C. # This is a comment

EXPLANATION

Python uses the hash symbol (#) for single-line comments. The other syntaxes are used in other programming languages.

Test

Q.12 Easy Basics & Syntax

Consider the code: num = '123'. What will int(num) return?

A 123.0

B 123

C '123'

D Error

Correct Answer: B. 123

EXPLANATION

int(num) converts the string '123' to the integer 123. The result is an integer type.

Test

Q.13 Easy Basics & Syntax

What does the len() function return when applied to a string 'India'?

A 4

B 5

C 6

D Error

Correct Answer: B. 5

EXPLANATION

The string 'India' has 5 characters (I, n, d, i, a), so len('India') returns 5.

Test

Q.14 Easy Basics & Syntax

What will be the result of executing: print(type(5.0))?

Correct Answer: B.

EXPLANATION

5.0 is a floating-point number, so type(5.0) returns <class 'float'>.

Test

Q.15 Easy Basics & Syntax

In Python, which of the following is an immutable data type?

A List

B Dictionary

C Tuple

D Set

Correct Answer: C. Tuple

EXPLANATION

Tuples are immutable in Python, meaning their elements cannot be changed after creation. Lists, dictionaries, and sets are all mutable.

Test

Q.16 Easy Basics & Syntax

What will be the output of: print(type(3.14))

Correct Answer: B.

EXPLANATION

3.14 is a floating-point number, so type() returns <class 'float'>.

Test

Q.17 Easy Basics & Syntax

What does len() function return when applied to a string?

A The ASCII value of first character

B The number of characters in the string

C The memory size of the string

D The index of last character

Correct Answer: B. The number of characters in the string

EXPLANATION

The len() function returns the number of characters (length) in a string.

Test

Q.18 Easy Basics & Syntax

What will be the output of: x = 5; y = 10; print(x == y)

A True

B False

C Error

D None

Correct Answer: B. False

EXPLANATION

The comparison operator == checks if x equals y. Since 5 ≠ 10, the result is False.

Test

Q.19 Easy Basics & Syntax

Which of the following statements about Python tuples is correct?

A Tuples are mutable and can be modified after creation

B Tuples are immutable and cannot be modified after creation

C Tuples use square brackets for declaration

D Tuples automatically convert to lists when assigned

Correct Answer: B. Tuples are immutable and cannot be modified after creation

EXPLANATION

Tuples are immutable sequences in Python, meaning their contents cannot be changed once created.

Test

Q.20 Easy Basics & Syntax

What is the correct way to create a dictionary in Python?

A d = {1: 'a', 2: 'b'}

B d = [1: 'a', 2: 'b']

C d = (1: 'a', 2: 'b')

D d = {1; 'a'; 2; 'b'}

Correct Answer: A. d = {1: 'a', 2: 'b'}

EXPLANATION

Dictionaries in Python use curly braces with key-value pairs separated by colons.

Test

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