Quiz – Python Programming

Which of the following is NOT a fundamental block of an algorithm?

• Statements

• Control flow

• Pointers

• Functions

Answer explanation

Pointers are not a fundamental block of an algorithm. The core components include statements, control flow, and functions, which define the structure and logic of an algorithm, while pointers are a programming concept used for memory management.

Which notation is commonly used for representing algorithms?

• Flowchart

• Pseudo code

• Natural language

• Binary code

Answer explanation

Pseudo code is a high-level description of an algorithm that uses structured language to outline its logic, making it easier to understand and implement. It is commonly used for representing algorithms compared to other options.

In recursion, a function calls:

• Another function

• The main function

• Itself

• Operating system

Answer explanation

In recursion, a function calls itself to solve smaller instances of the same problem. This self-referential behavior is what defines recursion, making 'itself' the correct answer.

Which of the following is an immutable data type in Python?

• List

• Tuple

• Dictionary

• Set

Answer explanation

In Python, a tuple is an immutable data type, meaning its elements cannot be changed after creation. In contrast, lists, dictionaries, and sets are mutable, allowing modifications to their contents.

What is the output of print(5//2)?

• 2.5

• 3

• 2

• Error

Answer explanation

The expression 5//2 performs floor division, which divides 5 by 2 and rounds down to the nearest whole number. Thus, the output is 2, making '2' the correct answer.

Which function is used to find the absolute value of a number?

• abs()

• fabs()

• modulus()

• round()

Answer explanation

The function abs() is used to find the absolute value of a number, returning its non-negative value. The other options do not serve this purpose: fabs() is for floating-point, modulus() finds remainders, and round() rounds numbers.

Which loop executes at least once regardless of condition?

• while

• for

• do-while (in Python)

• None of these

Answer explanation

The correct answer is 'None of these' because in Python, the 'do-while' loop does not exist. The 'while' and 'for' loops may not execute at all if their conditions are false, while 'do-while' guarantees at least one execution in other languages.

Which keyword is used to skip the current iteration of a loop?

• pass

• continue

• break

• skip

Answer explanation

The 'continue' keyword is used in loops to skip the current iteration and move to the next one. In contrast, 'break' exits the loop entirely, while 'pass' does nothing and 'skip' is not a valid keyword.

Which string method is used to check if all characters in a string are digits?

• isalpha()

• isdigit()

• isnumeric()

• isdecimal()

Answer explanation

The correct method to check if all characters in a string are digits is 'isdigit()'. This method returns True if all characters are numeric digits, while 'isalpha()', 'isnumeric()', and 'isdecimal()' serve different purposes.

What will be the output of: x = [1, 2, 3] print(x[1:])

• [1]

• [2, 3]

• [3]

• Error

Answer explanation

The expression x[1:] slices the list starting from index 1 to the end. Therefore, it returns the elements [2, 3], making the correct answer [2, 3].