ExamAdept

What does the range function return when used with two arguments, start and stop?

A:

A sequence from start to stop (exclusive)

B:

A sequence from start to stop (inclusive)

C:

A sequence of even numbers from start to stop

D:

A reversed sequence from start to stop (inclusive)

Answer: A

The range function with two arguments returns a sequence of numbers from start to stop (exclusive).

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Which loop is used for iterating over the characters of a string?

A:

for loop

B:

while loop

C:

do-while loop

D:

if loop

Answer: A

The for loop is commonly used for iterating over the characters of a string in Python.

my_string = "Hello"

for char in my_string:
    print(char)

In this example, the for loop iterates over each character in the string my_string and prints it to the console.

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Which loop in Python is primarily used for iterating over a sequence of numbers with a specified step size?

A:

for loop

B:

while loop

C:

do-while loop

D:

if loop

Answer: A

The for loop in Python is commonly used for iterating over a sequence of numbers with a specified step size.

for i in range(0, 10, 2):  # start at 0, stop before 10, step size of 2
    print(i)

In this example, the for loop iterates over the sequence of numbers from 0 to 8 (10 is not included) with a step size of 2, and prints each number to the console.

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In Python, what is the purpose of the break statement in a loop?

A:

Skips the remaining code in the loop and moves to the next iteration.

B:

Exits the loop prematurely.

C:

Repeats the loop indefinitely.

D:

Jumps to the next loop iteration.

Answer: B

The break statement is used to exit a loop prematurely, regardless of the loop's condition. Here's an example of using the break statement in a loop:

for i in range(1, 6):
    if i == 3:
        break
    print(i)

In this example, when the value of i becomes 3, the break statement is executed, causing the loop to terminate prematurely. As a result, only the numbers 1 and 2 are printed before the loop is exited.

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Which of the following is the correct syntax to define an infinite loop?

A:

for i in range(10):

B:

while True:

C:

while False:

D:

for i in range(1, 0, -1):

Answer: B

while True: creates an infinite loop, as the condition is always true.

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Questions for: Loops