Py4E Quiz seccion 2. Variables y declaraciones

 

Bienvenido Python Para Ingenieros de Python for Everybody

1. In the following code,

   print(98.6)
   

   What is "98.6"?

   A conditional statement

   An iteration / loop statement

   A constant

   A variable

2. Which of the following is a comment in Python?

   // This is a test

   /* This is a test */

   * This is a test

   # This is a test

3. What does the following code print out?

   print("123" + "abc")
   

   123abc

   123+abc

   This is a syntax error because you cannot add strings

   hello world

4. In the following code,

   x = 42
   

   What is "x"?

   A function

   A constant

   A variable

   A Central Processing Unit

5. Which of the following is a bad Python variable name?

   _spam

   Spam

   SPAM23

   23spam

6. Which of the following variables is the "most mnemonic"?

   hours

   variable_173

   x1q3z9ocd

   x

7. Which of the following is not a Python reserved word?

   if

   speed

   else

   for

8. Which of the following is not a Python reserved word?

   continue

   else

   iterate

   break

9. Assume the variable x has been initialized to an integer value (e.g., x = 3). What does the following statement do?

   x = x + 2
   

   Retrieve the current value for x, add two to it and put the sum back into x

   Produce the value "false" because "x" can never equal "x+2"

   This would fail as it is a syntax error

   Create a function called "x" and put the value 2 in the function

10. Which of the following elements of a mathematical expression in Python is evaluated first?

    Parentheses ( )

    Subtraction -

    Addition +

    Multiplication *

11. What is the value of the following expression

    42 % 10
    

    Hint - the "%" is the remainder operator

    2

    1042

    420

    10

12. What will be the value of x after the following statement executes:

    x = 1 + 2 * 3 - 8 / 4
    

    4

    15

    5.0

    3.0

13. What will be the value of x when the following statement is executed:

    x = int(98.6)
    

    100

    99

    98

    6

14. What does the Python input() function do?

    Take a screen shot from an area of the screen

    Read the memory of the running program

    Connect to the network and retrieve a web page.

    Pause the program and read data from the user