Python Institute Python Institute Certifications PCEP-30-02 Questions & Answers

• Question 411:

  How many stars will the following code print to the monitor?

  

  A. nine

  B. zero

  C. three

  D. six

  Correct Answer: C

• Question 412:

  Drag and drop the code boxes in order to build a program which prints Unavailable to the screen. (Note: one code box will not be used.)

  Select and Place:

  

  Correct Answer:

• Question 413:

  Drag and drop the literals to match their data type names.

  Select and Place:

  

  Correct Answer:

  

  

  One possible way to drag and drop the literals to match their data type names is:

  STRING: “All The King's Men”

  BOOLEAN: False

  INTEGER: 42

  FLOAT: -6.62607015E-34

  A literal is a value that is written exactly as it is meant to be interpreted by the Python interpreter. A data type is a category of values that share some common characteristics or operations. Python has four basic data types: string, boolean,

  integer, and float.

  A string is a sequence of characters enclosed by either single or double quotes. A string can represent text, symbols, or any other information that can be displayed as text. For example, “All The King's Men” is a string literal that represents

  the title of a novel.

  A boolean is a logical value that can be either True or False. A boolean can represent the result of a comparison, a condition, or a logical operation. For example, False is a boolean literal that represents the opposite of True.

  An integer is a whole number that can be positive, negative, or zero. An integer can represent a count, an index, or any other quantity that does not require fractions or decimals. For example, 42 is an integer literal that represents the answer

  to life, the universe, and everything.

  A float is a number that can have a fractional part after the decimal point. A float can represent a measurement, a ratio, or any other quantity that requires precision or approximation. For example, -6.62607015E-34 is a float literal that

  represents the Planck constant in scientific notation.

  You can find more information about the literals and data types in Python in the following references:

  [Python Data Types]

  [Python Literals]

  [Python Basic Syntax]

• Question 414:

  Insert the code boxes in the correct positions in order to build a line of code which asks the user for an integer value and assigns it to the depth variable. (Note: some code boxes will not be used.)

  Select and Place:

  

  Correct Answer:

  

  One possible way to insert the code boxes in the correct positions in order to build a line of code which asks the user for an integer value and assigns it to the depth variable is:

  depth = int(input("Enter the immersion depth: "))

  This line of code uses the input function to prompt the user for a string value, and then uses the int function to convert that string value into an integer number. The result is then assigned to the variable depth.

  You can find more information about the input and int functions in Python in the following references:

  [Python input() Function]

  [Python int() Function]

• Question 415:

  Drag and drop the conditional expressions to obtain a code which outputs * to the screen. (Note: some code boxes will not be used.)

  Select and Place:

  

  Correct Answer:

  

  One possible way to drag and drop the conditional expressions to obtain a code which outputs * to the screen is:

  if pool > 0:

  print("*")

  elif pool < 0:

  print("**")

  else:

  print("***")

  This code uses the if, elif, and else keywords to create a conditional statement that checks the value of the variable pool. Depending on whether the value is greater than, less than, or equal to zero, the code will print a different pattern of

  asterisks to the screen.

  The print function is used to display the output. The code is indented to show the blocks of code that belong to each condition. The code will output * if the value of pool is positive, ** if the value of pool is negative, and *** if the value of pool is

  zero.

  You can find more information about the conditional statements and the print function in Python in the following references:

  [Python If … Else]

  [Python Print Function]

  [Python Basic Syntax]

• Question 416:

  Assuming that the phonc_dir dictionary contains namemumber pairs, arrange the code boxes to create a valid line of code which retrieves Martin Eden's phone number, and assigns it to the number variable.

  Select and Place:

  

  Correct Answer:

  

  number = phone_dir["Martin Eden"]

  This code uses the square brackets notation to access the value associated with the key “Martin Eden” in the phone_dir dictionary. The value is then assigned to the variable number. A dictionary is a data structure that stores key-value pairs,

  where each key is unique and can be used to retrieve its corresponding value. You can find more information about dictionaries in Python in the following references:

  [Python Dictionaries - W3Schools]

  [Python Dictionary (With Examples) - Programiz]

  [5.5. Dictionaries — How to Think Like a Computer Scientist …]

• Question 417:

  Arrange the code boxes in the correct positions to form a conditional instruction which guarantees that a certain statement is executed when the speed variable is less than 50.0.

  Select and Place:

  

  Correct Answer:

  

  One possible way to arrange the code boxes in the correct positions to form a conditional instruction which guarantees that a certain statement is executed when the speed variable is less than 50.0 is:

  if speed < 50.0:

  print("The speed is low.")

  This code uses the if keyword to create a conditional statement that checks the value of the variable speed. If the value is less than 50.0, then the code will print “The speed is low.” to the screen. The print function is used to display the output.

  The code is indented to show the block of code that belongs to the if condition.

  You can find more information about the if statement and the print function in Python in the following references:

  Python If … Else

  Python Print Function

• Question 418:

  Arrange the code boxes in the correct positions in order to obtain a loop which executes its body with the level variable going through values 5, 1, and 1 (in the same order).

  Select and Place:

  

  Correct Answer:

  

• Question 419:

  Insert the code boxes in the correct positions in order to build a line of code which asks the user for a float value and assigns it to the mass variable. (Note: some code boxes will not be used.)

  Select and Place:

  

  Correct Answer:

  

  One possible way to insert the code boxes in the correct positions in order to build a line of code that asks the user for a float value and assigns it to the mass variable is:

  mass = float(input("Enter the mass: "))

  This line of code uses the input function to prompt the user for a string value, and then uses the float function to convert that string value into a floating-point number. The result is then assigned to the variable mass.

  You can find more information about the input and float functions in Python in the following references:

  [Python input() Function]

  [Python float() Function]

• Question 420:

  Arrange the binary numeric operators in the order which reflects their priorities, where the top-most position has the highest priority and the bottom-most position has the lowest priority.

  Select and Place:

  

  Correct Answer:

  

  The correct order of the binary numeric operators in Python according to their priorities is:

  Exponentiation (**)

  Multiplication (*) and Division (/, //, %)

  Addition (+) and Subtraction (-)

  This order follows the standard mathematical convention of operator precedence, which can be remembered by the acronym PEMDAS (Parentheses, Exponents, Multiplication/Division, Addition/Subtraction). Operators with higher precedence

  are evaluated before those with lower precedence, but operators with the same precedence are evaluated from left to right. Parentheses can be used to change the order of evaluation by grouping expressions.

  For example, in the expression 2 + 3 * 4 ** 2, the exponentiation operator (**) has the highest priority, so it is evaluated first, resulting in 2 + 3 * 16. Then, the multiplication operator (*) has the next highest priority, so it is evaluated next,

  resulting in 2 + 48. Finally, the addition operator (+) has the lowest priority, so it is evaluated last, resulting in 50.

  You can find more information about the operator precedence in Python in the following references:

  6. Expressions — Python 3.11.5 documentation Precedence and Associativity of Operators in Python - Programiz Python Operator Priority or Precedence Examples Tutorial