PCEP-30-02 Exam: Python I/O Operations - int() and float() functions

Last update on August 24 2024 12:51:21 (UTC/GMT +8 hours)

PCEP Certification Practice Test - Questions, Answers and Explanations

This comprehensive set of questions and explanations covers the topic of performing Input/Output console operations with a focus on the int() and float() functions. These exercises will help reinforce your understanding and preparation for the PCEP-30-02 examination.

Question 1: What will be the output of the following code?

print(int(3.7))

3
4
3.7
Error

▼

Answer: a) 3

Explanation: The int() function truncates the decimal part of the floating-point number, resulting in 3.

Question 2: What will be the result of the following code?

print(float(7))

7
7.0
7.00
Error

▼

Answer: b) 7.0

Explanation: The float() function converts an integer to a floating-point number, appending .0 to the integer.

Question 3: Which of the following conversions is valid?

value = int("123")

Converts string "123" to integer 123
Converts string "123" to float 123.0
Converts integer 123 to string "123"
Converts float 123.0 to integer 123

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Answer: a) Converts string "123" to integer 123

Explanation: The int() function can convert a string representing an integer to an actual integer value.

Question 4: What will be the result of the following code?

print(int("12.34"))

12
12.34
Error
1234

▼

Answer: c) Error

Explanation: The int() function cannot directly convert a string containing a decimal point to an integer, resulting in a ValueError.

Question 5: Which of the following statements will correctly convert the string "456" to a number? (Select all that apply)

int("456")
float("456")
int(456)
float(456)

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Answer: a) int("456"), b) float("456")

Explanation: The int() function converts the string "456" to the integer 456, and the float() function converts the string "456" to the floating-point number 456.0.

Question 6: Which of the following statements will raise an error? (Select all that apply)

int("abc")
float("1.23.45")
int("123")
float("123.45")

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Answer: a) int("abc"), b) float("1.23.45")

Explanation: The int() function will raise a ValueError when attempting to convert a non-numeric string, and the float() function will raise a ValueError when attempting to convert a string with an invalid float format.

Question 7: Arrange the following steps in the correct order to convert a string representing a floating-point number into an integer:

Convert the float to an integer.
Convert the string to a float.

▼

Answer:

```
Convert the string to a float.
```
```
Convert the float to an integer.
```

Explanation: First, you need to convert the string to a float using float(), then convert the float to an integer using int().

Question 8: The ______ function is used to convert a floating-point number to an integer by removing the decimal part.

▼

Answer: int

Explanation: The int() function truncates the decimal part and converts the floating-point number to an integer.

Question 9: The ______ function converts a string representing a number to a floating-point number.

▼

Answer: float()

Explanation: The float() function is used to convert a string that represents a number to a floating-point number.

Question 10: Sort the following code snippets to output the integer 5:

number = int(number)
number = "5.9"
number = float(number)

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Answer:

number = "5.9"
number = float(number)
number = int(number)

Explanation: First, assign the string "5.9" to number, then convert it to a float using float(), and finally convert the float to an integer using int().

Question 11: Fill in the missing code to convert the string "8.25" to an integer.

number = int(float("______"))

▼

Answer: "8.25"

Explanation: The correct code is number = int(float("8.25")), which first converts the string "8.25" to a float, then to an integer, resulting in 8.

Question 12: Fill in the missing code to convert the integer 10 to a floating-point number.

number = float(______)

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Answer: 10

Explanation: The correct code is number = float(10), which converts the integer 10 to the floating-point number 10.0.

Question 13: Insert the correct function to convert the string "3.14159" to a floating-point number.

number = ______("3.14159")

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Answer: float

Explanation: The correct code is number = float("3.14159"), which converts the string "3.14159" to the floating-point number 3.14159.

Question 14: Insert the correct function to convert the integer 42 to a floating-point number.

number = ______(42)

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Answer: float

Explanation: The correct code is number = float(42), which converts the integer 42 to the floating-point number 42.0.

Question 15: What will be the result of the following code?

print(int(9.99))

9
10
9.99
Error

▼

Answer: a) 9

Explanation: The int() function truncates the decimal part of the floating-point number, resulting in 9.

Question 16: What will be the output of the following code?

print(float("2.718"))

2
2.7
2.718
Error

▼

Answer: c) 2.718

Explanation: The float() function converts the string "2.718" to the floating-point number 2.718.

Question 17: Which of the following will convert the integer 123 to a floating-point number? (Select all that apply)

float(123)
int(123.0)
float("123")
float("123.0")

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Answer: a) float(123), c) float("123"), d) float("123.0")

Explanation: The float() function can convert both an integer and a string representing an integer or float to a floating-point number.

Question 18: Which of the following statements will correctly convert the string "5" to an integer? (Select all that apply)

int("5")
int(5.0)
int(float("5"))
int("5.0")

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Answer: a) int("5"), b) int(5.0), c) int(float("5"))

Explanation: The int() function can convert a string representing an integer, a floating-point number, or a float-converted string to an integer. Option d) will raise a ValueError.

Question 19: Arrange the following steps to convert the string "10.5" to an integer:

Convert the float to an integer.
Convert the string to a float.

▼

Answer:

Convert the string to a float.
Convert the float to an integer.

Explanation: First, convert the string "10.5" to a float using float(), then convert it to an integer using int().

Question 20: The ______ function converts a string or an integer to a floating-point number.

▼

Answer: float()

Explanation: The float() function is used to convert a string representing a number or an integer to a floating-point number.

Question 21: The ______ function is used to truncate a floating-point number to an integer.

▼

Answer: int()

Explanation: The int() function truncates the decimal part of a floating-point number and converts it to an integer.

Question 22: Sort the following code snippets to output the floating-point number 12.34:

value = float(value)
value = "12.34"

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Answer:

value = "12.34"
value = float(value)

Explanation: First, assign the string "12.34" to value, then convert it to a float using float().

Question 23: Fill in the missing code to convert the string "7.89" to an integer after converting it to a float.

number = int(float("______"))

▼

Answer: "7.89"

Explanation: The correct code is number = int(float("7.89")), which first converts the string "7.89" to a float, then to an integer, resulting in 7.

Question 24: Fill in the missing code to convert the string "123" to an integer.

number = int("______")

▼

Answer: "123"

Explanation: The correct code is number = int("123"), which converts the string "123" to the integer 123.

Question 25: Insert the correct function to convert the string "3.5" to an integer after converting it to a float.

number = int(______("3.5"))

▼

Answer: float

Explanation: The correct code is number = int(float("3.5")), which first converts the string "3.5" to a float, then to an integer, resulting in 3.