Python Institute PCEP-30-02 Online Practice Questions and Exam Preparation

Python Institute PCEP-30-02 Online Questions & Answers

• Question 231:

  What is the expected output of the following code?

  

  A. 3
  B. 4
  C. 1
  D. 2
  A. 3

• Question 232:

  What is the expected output of the following code?

  

  A. 5
  B. 4
  C. 6
  D. The code raises an exception and outputs nothing.
  D. The code raises an exception and outputs nothing.

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  Explanation/Reference:

  The code snippet that you have sent is trying to print the combined length of two lists, "collection" and "duplicate". The code is as follows: collection = [] collection.append(1) collection.insert(0, 2) duplicate = collection duplicate.append(3) print(len(collection) + len(duplicate)) The code starts with creating an empty list called "collection" and appending the number 1 to it. The list now contains [1]. Then, the code inserts the number 2 at the beginning of the list. The list now contains [2, 1]. Then, the code creates a new list called "duplicate" and assigns it the value of "collection". However, this does not create a copy of the list, but rather a reference to the same list object. Therefore, any changes made to "duplicate" will also affect "collection", and vice versa. Then, the code appends the number 3 to "duplicate". The list now contains [2, 1, 3], and so does "collection". Finally, the code tries to print the sum of the lengths of "collection" and "duplicate". However, this causes an exception, because the len function expects a single argument, not two. The code does not handle the exception, and therefore outputs nothing. The expected output of the code is nothing, because the code raises an exception and terminates. Therefore, the correct answer is D. The code raises an exception and outputs nothing. Reference: [Python Institute - Entry-Level Python Programmer Certification]

• Question 233:

  What happens when the user runs the following code?

  

  A. The code outputs 3.
  B. The code outputs 2.
  C. The code enters an infinite loop.
  D. The code outputs 1.
  B. The code outputs 2.

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  Explanation/Reference:

  The code snippet that you have sent is calculating the value of a variable "total" based on the values in the range of 0 to 3. The code is as follows: total = 0 for i in range(0, 3): if i % 2 == 0: total = total + 1 else: total = total + 2 print(total) The code starts with assigning the value 0 to the variable "total". Then, it enters a for loop that iterates over the values 0, 1, and 2 (the range function excludes the upper bound). Inside the loop, the code checks if the current value of "i" is even or odd using the modulo operator (%). If "i" is even, the code adds 1 to the value of "total". If "i" is odd, the code adds 2 to the value of "total". The loop ends when "i" reaches 3, and the code prints the final value of "total" to the screen. The code outputs 2 to the screen, because the value of "total" changes as follows: When i = 0, total = 0 + 1 = 1 When i = 1, total = 1 + 2 = 3 When i = 2, total = 3 + 1 = 4 When i = 3, the loop ends and total = 4 is printed Therefore, the correct answer is B. The code outputs 2. Reference: [Python Institute - Entry-Level Python Programmer Certification]

• Question 234:

  Which of the following expressions evaluate to a non-zero result? (Select two answers.)

  A. 2 ** 3 / A - 2
  B. 4 / 2 * * 3 - 2
  C. 1 * * 3 / 4 - 1
  D. 1 * 4 // 2 ** 3
  A. 2 ** 3 / A - 2
  B. 4 / 2 * * 3 - 2

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  Explanation/Reference:

  In Python, the ** operator is used for exponentiation, the / operator is used for floating-point division, and the // operator is used for integer division. The order of operations is parentheses, exponentiation, multiplication/division, and addition/ subtraction. Therefore, the expressions can be evaluated as follows:

  A. 2 ** 3 / A - 2 = 8 / A - 2 (assuming A is a variable that is not zero or undefined) B. 4 / 2 *

  * 3 - 2 = 4 / 8 - 2 = 0.5 - 2 = -1.5 C. 1 * * 3 / 4 - 1 = 1 / 4 - 1 = 0.25 - 1 = -0.75 D. 1 * 4 // 2 ** 3 = 4 // 8 = 0

  Only expressions A and B evaluate to non-zero results. Reference: [Python Institute - Entry-Level Python Programmer Certification]

• Question 235:

  What is the expected output of the following code? print(type(1J))

  D

• Question 236:

  The escape character owes its name to the fact that it:

  A. cannot be caught due to its high speed
  B. escapes from source les into the computer memory
  C. changes the meaning of the character next to it
  C. changes the meaning of the character next to it

• Question 237:

  Only one of the following statements is true - which one?

  A. addition precedes multiplication
  B. multiplication precedes addition
  C. neither statement can be evaluated
  B. multiplication precedes addition

• Question 238:

  Right-sided binding means that the following expression

  

  will be evaluated:

  A. from right to left
  B. in random order
  C. from left to right
  A. from right to left

• Question 239:

  What is the expected output of the following code?

  

  A. 1 2 3
  B. 1 2 2
  C. 3 2 1
  D. 2 1 3
  A. 1 2 3

• Question 240:

  Which of the following sentences correctly describes the output of the below Python code?

  

  A. None of the above.
  B. res is the sum of all the number in the list.
  C. res is the smallest number in the list.
  D. res is the largest number in the list.
  E. res is the average of all the number in the list.
  C. res is the smallest number in the list.