PCEP Practice Exam 2

What do you expect the following code will print given the first input is

apple (stored in variable a) and the second input is banana (stored in

variable b)?

• apple:banana

• apple::banana

• banana:apple:

• banana::apple

Answer explanation

The inputs were swapped duing the assignment. x is assigned the value stored inside b, and y is assigned the value stored inside a.

What will the output be after running the following code snippet?

• 0

• 4

• 2

• 1

Answer explanation

The if clause inside myfun will evaluate to true since the value passed to the function is >= 4. The if block will then be executed, and the value of 4 will be returned.

What will the output be after running the following code snippet?

• ['bananas', '']

• ['bananas']

• ['apples']

• ['apples', 'bananas', '']

Answer explanation

The element 'bananas' will be removed from the list, and will be replaced by empty element at its position.

What will the output be after running the following code snippet?

• [7, 6, 5, 4, 3, 2, 1]

• [1, 2, 3, 4, 5, 6, 7]

• [1, 2, 3, 4, 5, 6]

• [2, 3, 4, 5, 6, 7]

Answer explanation

The answer is [7, 6, 5, 4, 3, 2, 1]. The symbol [:] accesses all elements in the list. [::-1] accesses all elements in the list but in reverse order.

What will the output be after running the following code snippet?

• 0b01

• 0b11

• 0b10

• 10

Answer explanation

The XOR (^) evaluates to 1 if either of the bits are 1. If both bits are 0 or both bits are 1, it retuns 1. We represent binary numbers with prefix of 0b.

What is the output of the following program?

• 1

• 9

• 10

• 90

Answer explanation

The answer is 90. The inner loop iterates 9 times and the outer loop iterates 10 times for every iteration of the outer loop. So the answer is 9*10=90.

What will the output be after running the following code snippet?

• Not equal

• Equal

• False

• True

Answer explanation

Elements at each position in each list are compared in order when using the ==. In this example, the elements differ.

What will the output be after running the following code snippet?

• 4

• error

• 1

• 9

Answer explanation

Exponentiation has higher precedence over modulus operator, hence the above is evaluated 2 ** 4 =16, then 9 % 16 = 9.

What is the output of the following snippet of code:

• 2

• 3

• Nothing is printed

• 0

Answer explanation

The function does not return anything.

What will the output be after running the following code snippet?

• Values are the same

• Values are different

• True

• False

Answer explanation

The value of the numbers are the same even they they are of different types (integer vs float).