Test: Loops - 2 - Software Development MCQ

The break statement is used to exit a loop prematurely. When encountered, it terminates the loop and transfers control to the statement immediately following the loop.

The range() function is used in a for loop to generate a sequence of numbers to iterate over. It allows specifying the start, end, and step size of the sequence.

The range(5) generates a sequence of numbers from 0 to 4 (5 numbers). The loop will execute five times, once for each number in the range.

The loop iterates over the range range(3), which generates the numbers 0, 1, and 2. The else block is executed after the loop completes, printing "Loop completed."

The while loop is ideal to use when the number of iterations is unknown because it repeatedly executes a block of code as long as a given condition is true.

The loop checks if the given number num is divisible by any number from 2 to num-1. If it finds a factor, it prints "Not a prime number" and breaks out of the loop. Otherwise, it prints "Prime number."

In Python, there is no direct construct for a do-while loop. However, we can achieve the same behavior by using a while loop with an initial condition and then checking the loop condition.

The condition True is always true, so the while loop will continue executing indefinitely unless there is a break statement or an external interrupt.

The code checks if the number num is divisible by 2 using the modulus operator (%). If the remainder is 0, it is an even number and "Even" is printed.

The loop iterates over the range range(5), which generates the numbers 0, 1, 2, 3, and 4. When i is equal to 3, the break statement is encountered, and the loop is terminated. The else block is not executed in this case.

The range(2, 10, 3) generates a sequence of numbers starting from 2 and incrementing by 3 at each step until less than 10. The loop prints each number in the sequence.

The loop iterates over the range range(num), which generates the numbers 0, 1, 2, 3, and 4. When i is equal to 3, the continue statement is encountered, skipping the print statement for 3.

The while loop executes until the condition i < 5 is false. Inside the loop, i is printed, and if it becomes equal to 3, the break statement is encountered, terminating the loop.

The loop iterates over the range range(5), which generates the numbers 0, 1, 2, 3, and 4. When i is equal to 2, the continue statement is encountered, skipping the print statement for 2. The else block is executed after the loop completes, printing "Loop completed."

The while loop repeatedly divides the number 'num' by 2 using the floor division operator (//=), which performs integer division and discards the remainder. This results in the sequence: 10, 5, 2, 1 being printed, corresponding to option 'b'.

The loop iterates over the range range(2, 6), which generates the numbers 2, 3, 4, and 5. When i is divisible by 2, the continue statement is encountered, skipping the print statement for even numbers.

The nested loops iterate over the range range(3) and range(2). The print statement outputs the sum of i and j for each combination of i and j.

The loop iterates over the range range(num), which generates the numbers 0, 1, 2, 3, and 4. When i is equal to 2, the break statement is encountered, terminating the loop.

b) Not a prime number
The loop iterates over the range range(2, num), generating numbers from 2 to 9. It checks if num is divisible by any of these numbers. Since 10 is divisible by 2, the condition if num % i == 0 becomes true, and it prints "Not a prime number" and breaks out of the loop. Therefore, the correct output of the code is "Not a prime number."