PCEP Data Types, Variables, Basic I/O and Operators Practice Test 7 — 15 Questions

Question 1

Given 'a = 10; b = 3; c = a // b; d = a % b', what is the value of c + d?

Accepted Answer

4. In Python, the // operator performs floor division, so a // b = 10 // 3 = 3. The % operator returns the remainder, so a % b = 10 % 3 = 1. Therefore, c + d = 3 + 1 = 4, making option A correct.

Answer

5

Answer

7

Answer

6

Question 2

What does 'print(2 ** 3)' output?

Accepted Answer

8. The ** operator in Python performs exponentiation, raising the left operand (2) to the power of the right operand (3), which equals 8. The print() function then outputs this integer result to the console.

Answer

9

Answer

23

Answer

6

Question 3

After 'x = 5; x += 3', what is the value of x?

Accepted Answer

8. The compound assignment operator `+=` adds the right operand to the current value of the variable and assigns the result back. Starting with `x = 5`, the statement `x += 3` is equivalent to `x = x + 3`, which computes `5 + 3 = 8` and stores it in `x`.

Answer

5

Answer

3

Answer

15

Question 4

What is the result of 'bool(0) and bool(1)'?

Accepted Answer

False. The expression `bool(0) and bool(1)` evaluates to `False` because `bool(0)` converts the integer 0 to `False` (since 0 is falsy in Python), and `bool(1)` converts 1 to `True`. The `and` operator returns `True` only if both operands are truthy; here, `False and True` yields `False`.

Answer

True

Answer

1

Answer

0

Question 5

Which function is used to read user input as a string?

Accepted Answer

input(). The `input()` function is the correct answer because it is the built-in Python function specifically designed to read a line of text from the user via standard input (stdin). It always returns the input as a string, regardless of whether the user types digits or other characters, making it the standard tool for console input in Python.

Answer

read()

Answer

scan()

Answer

get()

Question 6

What is the output of 'print(3 * "ab")'?

Accepted Answer

ababab. In Python, the multiplication operator (*) when used with a string and an integer performs string repetition. The expression 3 * "ab" repeats the string "ab" three times, concatenating the copies into a single string "ababab". The print() function then outputs this resulting string to the console.

Answer

ab3

Answer

3ab

Answer

Error

Question 7

Given 's = "Hello"; t = s[0:3]; print(t)', what is the output?

Accepted Answer

Hel. String slicing in Python uses the syntax `s[start:stop]`, where the stop index is exclusive. For `s = "Hello"`, `s[0:3]` extracts characters from index 0 up to but not including index 3, resulting in indices 0 ('H'), 1 ('e'), and 2 ('l'), giving the substring "Hel".

Answer

ello

Answer

H

Answer

Hell

Question 8

Which TWO of the following are valid Python variable names?

Accepted Answer

_count. Option A, `_count`, is a valid Python variable name because it begins with an underscore, which is an allowed identifier character, and contains only letters and underscores. Option B, `my_var`, is also valid since it starts with a letter and uses only letters and underscores, conforming to Python's identifier rules (letters, digits, and underscores, not starting with a digit). Option C, `var-name`, is invalid because hyphens are not permitted in Python identifiers; the hyphen would be parsed as a subtraction operator. Option D, `2nd_var`, is invalid because an identifier cannot begin with a digit. Option E, `var name`, is invalid because spaces are not allowed in identifiers.

Answer

var-name

Answer

2nd_var

Answer

var name

Question 9

Which THREE of the following are Python built-in data types?

Accepted Answer

bool. Option B (bool) is a Python built-in type used for the two truth values True and False, and it is a subclass of int. Option D (float) is a built-in numeric type representing double-precision floating-point numbers such as 3.14. Option E (int) is a built-in numeric type for arbitrary-precision integers, so it is correct as well. Option A (array) is not a built-in type; it is provided by the standard-library array module (or similar third-party libraries), so it must be imported rather than being built in. Option C (char) is not a Python built-in type at all; Python represents single characters as strings of length 1, and there is no char type.

Answer

array

Answer

char

Question 10

Refer to the exhibit. What is the cause of the error?

Accepted Answer

Using + on incompatible types (str and int). The error occurs because the `+` operator is being used between a string and an integer, which are incompatible types in Python. Python does not implicitly convert the integer to a string for concatenation; it raises a `TypeError: unsupported operand type(s) for +: 'str' and 'int'`.

Answer

Division by zero

Answer

Missing import statement

Answer

Variable not defined

Question 11

Given x = 100 and y = 105, what is the value of z if z = x + y?

Accepted Answer

205. The values of x and y are 100 and 105 respectively. The expression z = x + y calculates their sum: 100 + 105 = 205. Therefore, print(z) outputs 205.

Answer

200

Answer

25

Answer

250

Question 12

Refer to the exhibit. The code used is: name = input('Enter name: '); print('Hello', name). What will be printed if the user enters 'Alice'?

Accepted Answer

Hello Alice. The `input()` function captures the user's typed input as a string, and the `print()` function outputs the string 'Hello ' followed by the value of the `name` variable. When the user enters 'Alice', `name` becomes 'Alice', so the output is 'Hello Alice'.

Answer

Hello Bob

Answer

Error

Answer

Hello name

Question 13

A developer writes the following code: result = (5 + 3) * 2 ** 3 // 4. What is the value of result?

Accepted Answer

16. Python follows the operator precedence rules: exponentiation (**) is evaluated before multiplication and division, and multiplication/division are evaluated before addition/subtraction. The expression evaluates as: 2 ** 3 = 8, then (5 + 3) = 8, then 8 * 8 = 64, then 64 // 4 = 16. The integer division (//) yields an integer result of 16.

Answer

8

Answer

13

Answer

64

Question 14

Which of the following variable names is valid in Python?

Accepted Answer

_count. (_count) is valid because Python allows identifiers to start with an underscore, and it contains only letters and underscores. Python variable names must start with a letter or underscore, followed by letters, digits, or underscores, and cannot be a reserved keyword.

Answer

1st_value

Answer

my-var

Answer

class

Question 15

An accountant uses a Python script to calculate tax: tax = price * 0.08. For price=19.99, tax results in 1.5992. However, the output should be rounded to two decimal places. Which expression should replace the current one?

Accepted Answer

tax = round(price * 0.08, 2). The built-in `round()` function with a second argument of 2 rounds the floating-point result of `price * 0.08` to exactly two decimal places, which matches the requirement for currency formatting. The other options either omit rounding, round to an integer, or use integer truncation that can produce incorrect results for negative numbers or edge cases.

Answer

tax = round(price * 0.08)

Answer

tax = price * 0.08

Answer

tax = int(price * 0.08 * 100) / 100