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

Python Institute PCEP-30-02 Online Questions & Answers

• Question 91:

  What is the output of the following code?

  

  A. The output cannot be predicted.
  B. 2
  C. The program will cause an error.
  D. 1
  B. 2

• Question 92:

  What is the expected output of the following code?

  

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

• Question 93:

  What is the expected output of the following code?

  

  A. ****
  B. The code is erroneous.
  C. **
  D. *
  A. ****

• Question 94:

  What is the expected output of the following code?

  

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

• Question 95:

  What is the output of the following code if the user enters a 0?

  

  A. 1 | 0.0
  B. 1 | Very very bad input...
  C. 1 | 1.0
  D. 1 | Booo!
  E. 1 | Bad input...
  F. 1 | Very bad input..
  F. 1 | Very bad input..

• Question 96:

  What is the output of the following snippet?

  

  A. 2
  B. The snippet is erroneous
  C. 4
  D. 6
  C. 4

• Question 97:

  Which of the approachable except: branches is taken into consideration when an exception occurs?

  A. The last matching branch.
  B. The rst matching branch.
  C. Any of the matching branches.
  B. The rst matching branch.

• Question 98:

  UNICODE is a standard:

  A. for coding oating-point numbers.
  B. used by coders from universities.
  C. honored by the whole universe.
  D. like ASCII, but much more expansive.
  D. like ASCII, but much more expansive.

• Question 99:

  Assuming that the following assignment has been successfully executed:

  My_list ?[1, 1, 2, 3]

  Select the expressions which will not raise any exception.

  (Select two expressions.)

  A. my_list[-10]
  B. my_list|my_Li1st | 3| I
  C. my list [6]
  D. my_List- [0:1]
  B. my_list|my_Li1st | 3| I
  D. my_List- [0:1]

  ---

  Explanation/Reference:

  The code snippet that you have sent is assigning a list of four numbers to a variable called "my_list". The code is as follows:

  my_list = [1, 1, 2, 3]

  The code creates a list object that contains the elements 1, 1, 2, and 3, and assigns it to the variable "my_list". The list can be accessed by using the variable name or by using the index of the elements. The index starts from 0 for the first

  element and goes up to the length of the list minus one for the last element. The index can also be negative, in which case it counts from the end of the list. For example, my_list[0] returns 1, and my_list[-1] returns 3.

  The code also allows some operations on the list, such as slicing, concatenation, repetition, and membership. Slicing is used to get a sublist of the original list by specifying the start and end index. For example, my_list[1:3] returns [1, 2].

  Concatenation is used to join two lists together by using the + operator. For example, my_list + [4, 5] returns [1, 1, 2, 3, 4, 5]. Repetition is used to create a new list by repeating the original list a number of times by using the * operator. For

  example, my_list * 2 returns [1, 1, 2, 3, 1, 1, 2, 3]. Membership is used to check if an element is present in the list by using the in operator. For example, 2 in my_list returns True, and 4 in my_list returns False. The expressions that you have

  given are trying to access or manipulate the list in different ways. Some of them are valid, and some of them are invalid and will raise an exception. An exception is an error that occurs when the code cannot be executed properly. The

  expressions are as follows:

  A. my_list[-10]: This expression is trying to access the element at the index -10 of the list. However, the list only has four elements, so the index -10 is out of range. This will raise an IndexError exception and output nothing.

  B. my_list|my_Li1st | 3| I: This expression is trying to perform a bitwise OR operation on the list and some other operands. The bitwise OR operation is used to compare the binary representation of two numbers and return a new number that

  has a 1 in each bit position where either number has a 1. For example, 3 | 1 returns 3, because 3 in binary is 11 and 1 in binary is 01, and 11 | 01 is 11. However, the bitwise OR operation cannot be applied to a list, because a list is not a

  number. This will raise a TypeError exception and output nothing.

  C. my list [6]: This expression is trying to access the element at the index 6 of the list. However, the list only has four elements, so the index 6 is out of range. This will raise an IndexError exception and output nothing.

  D. my_List- [0:1]: This expression is trying to perform a subtraction operation on the list and a sublist. The subtraction operation is used to subtract one number from another and return the difference. For example, 3 - 1 returns 2. However, the

  subtraction operation cannot be applied to a list, because a list is not a number. This will raise a TypeError exception and output nothing.

  Only two expressions will not raise any exception. They are:

  B. my_list|my_Li1st | 3| I: This expression is not a valid Python code, but it is not an expression that tries to access or manipulate the list. It is just a string of characters that has no meaning. Therefore, it will not raise any exception, but it will

  also not output anything. D. my_List- [0:1]: This expression is a valid Python code that uses the slicing operation to get a sublist of the list. The slicing operation does not raise any exception, even if the start or end index is out of range. It will

  just return an empty list or the closest possible sublist. For example, my_list[0:10] returns [1, 1, 2, 3], and my_list[10:20] returns []. The expression my_List- [0:1] returns the sublist of the list from the index 0 to the index 1, excluding the end

  index. Therefore, it returns [1]. This expression will not raise any exception, and it will output [1].

  Therefore, the correct answers are B. my_list|my_Li1st | 3| I and D. my_List- [0:1].

  Reference: [Python Institute - Entry-Level Python Programmer Certification]

• Question 100:

  Which one of the lines should you put in the snippet below to match the expected output? Expected output:

  

  Code:

  

  A. reverse(list)
  B. list.reversed()
  C. list.reverse()
  D. reversed(list)
  C. list.reverse()