Python Exam Review

Question 1

If an object’s reference count is 0, memory for that object is deallocated and marked for garbage collection. True of False

Answer 1

True

Question 2

All of the are true of variable in python, except

Constructed of a name and value
Considered a data container
Declare their variable type before assigning a value or object
Used for easy reference in computations

Answer 2

Declare the variable type before assigning a value or object

Question 3

The input function returns an object of what data type?

Answer 3

string

Question 4

What is the preferred method for string formatting in python 3.6+?

Answer 4

f string

Question 5

Converting a variable to a different type is NOT called type casting. True or False

Answer 5

False

Question 6

What is the comparison operator to see if two objects are explicitly equal?

Answer 6

==

Question 7

In python, (2**3) evaluates to?
6
8
6.0
8.0

Answer 7

8

Question 8

In python, (18 % 7) evaluates to?
2.57
4.0
2
4

Answer 8

4

Question 9

In python, (18//7) evaluates to?
4
4.0
2
2.0

Answer 9

2

Question 10

If we give XOR True and True, it will return?

Answer 10

False

Question 11

Taking a subsection of a string or list is called “slicing” True of False

Answer 11

True

Question 12

Which is not the conditions in python?
-Usually use boolean values to evaluate conditions

• The final else is typed with explicit condition
• You can use as many conditions as you want
• Start with an if, end with an else, and elif every condition in between

Answer 12

The final else is typed with explicit condition

Question 13

What is the only mathematical operator we can use on two strings?

Answer 13

+ plus sign

Question 14

What is the only mathematical operator we can do on a string and an int?
+
-
*
/

Answer 14

• multipication

Question 15

Which advance data structures have we not discussed?
Dictionary
Tuple
List
Queue

Answer 15

Queue

Question 16

The inputs to a string or list slice are start, stop, step respectively True or False

Answer 16

True

Question 17

What data type do we index on an int?
Dictionary
tuple
list
queue

Answer 17

List

Question 18

What type of data do we index on a string?

dictionary
tuple
list
queue

Answer 18

dictionary

Question 19

With list, we use del to delete an item based on value, and we use the.remove method to remove an item based on index
True or False

Answer 19

False

Question 20

What variable type is var, if we assign var = “Hello World”

string
dictionary
list
tuple

Answer 20

Tuple

Question 21

What is regarded as the lowest level source code?
Python
C#
Java
Machine Code

Answer 21

Machine Code

Question 22

What is the default implementation type of python that we get from python.org
Cypthon
Jython
IronPyton
Phyton2

Answer 22

Cypthon

Question 23

Python is best at low level programming?
True or False

Answer 23

False

Question 24

In Pycharm, what do you usually configure for every new project?

Theme
Font
Interpreter
Enable zoom with mouse wheel

Answer 24

Interpreter

Question 25

What is not a primitive data type in python? string integer boolean character

Answer 25

character

Question 26

Complied languages are faster as first, but get slower with each thereafter True or False

Answer 26

False

Question 27

When comparing python3 with python2, which is not true of python3? Formally replaced python2 in early 2020 Strings are stored as ASCII characters by default Uses print("hello") instead of print "hello" int / int = float, not rounded to a whole number (int)

Answer 27

Strings are stored as ASCII characters by default

Question 28

Which of these is not and IDE we mentioned? PyCharm IntelliJ IDEA Visual Studio Code C#

Question 29

In python you can start a comment with both # and '""

Answer 29

True

Question 30

True or False "Hello World!" is a complete string?

Answer 30

False

Question 31

What data type is var in var = 7 string int float boolean

Answer 31

int

Question 32

What data type is var in var = "cat"? string int float boolean

Answer 32

string

Question 33

What data type is var in var = string int float boolean

Answer 33

float

Question 34

What data type is var in var = False? string int float boolean

Answer 34

boolean

Question 35

Loops are blocks of code that repeat logic as long as a condition is true

Answer 35

True

Question 36

Loops repeat the indented code block on each iteration

Answer 36

True

Question 37

How many numbers get printed? 3 7 9 None

Answer 37

9

Question 38

What will be printed? 5 0-4 0-5 0

Answer 38

0-4

Question 39

The print function always has to end with a new line character True or False

Answer 39

False

Question 40

What gets printed? cat 3 catdog73 error

Answer 40

error

Question 41

What gets printed? David John Cooper Nick, David,John,Cooper,Nick, 1,2,3,4 0,1,2,3,

Answer 41

0,1,2,3,

Question 42

Which loop cannot be an infinite loop? for loop while loop nested loop all of these loops can be infinite

Answer 42

all of these loops can be infinite

Question 43

The following prints and infinite loop True or False nums = [1, 2, 3] for i in range (len(nums)): print (i) nums.append(i)

Answer 43

False

Question 44

The following prints and infinite loop start = 0 while start < 4: print(start)

Answer 44

True

Question 45

What does the following print? word = "Sunshine" for i in range(1, 7, 2 ): print(word[i], end="@") 1@3@5@ u@s@i@ Sunshine@ u@s@i@e@

Answer 45

u@s@i@

Question 46

What will the following do? password ="" while password != "Pa$$w0rd": password = input("Enter password: ") infinite loop ask for password until Pa$$w0rd is entered ask for password once print the password

Answer 46

ask for password until Pa$$w0rd is entered

Question 47

What type of loop do we use if we don't know how many times we want to repeat something? while loop for loop nested loop if function

Answer 47

while loop

Question 48

What 2 python keywords do we use in combination to handle errors? try and except try and else try and error except and finally

Answer 48

try and except

Question 49

Which method is the os module gets the path? os.getcwd os.walk os.stat os.listdir

Answer 49

os.getcwd

Question 50

Which is not NOT a common exception type we mentioned? ZeroDivisionError TypeError KeyboardInterrupt CombinationError

Answer 50

CombinationError

Question 51

What is the output of the following? try: num1 = 10 num2 = 0 div = num1 / num2 except ZerDivisionError: print("cat" , end=" ") else: print("sat" , end=" ") finally: print("mat" , end=" ") cat cat sat cat mat cat sat mat

Answer 51

cat mat

Question 52

What python keyword forcefully raises an exception every time? except raise error else

Question 53

The code inside a finally block only runs if the block is successful. True or False

Answer 53

False

Question 54

What python keyword automatically close a file upon completion of its code block? open with open flush read

Answer 54

with open

Question 55

We use error handling in python to avoid inadvertent privilege escalation and data loss. True or False

Answer 55

True

Question 56

What special character is used at the end of the first line in a control statement before the next line is indented? # : $ +

Answer 56

:

Question 57

When opening a file, what special character gives read or write access depending on what is selected? # : $ +

Answer 57

+

Question 58

What character opens a file in read binary mode? r b a w

Answer 58

b

Question 59

Which function combines all list objects into a single string? split join pair combine

Answer 59

split join pair combine

Question 60

Which function converts a string into multiple list objects? split join pair combine

Answer 60

split

Question 61

The platform module can print the python complier for the OS True or False

Answer 61

True

Question 62

If we import the random module and assign randon.randint(1.10) to a variable, what is the highest number it can have? 9 10 11 1

Answer 62

10

Question 63

What module did we use to run local shell commands? sys os platform socket

Answer 63

OS

Question 64

What is not true about functions? Necessary to prevent code from becoming incomprehensible Save the time and effort of writing the same code over and over again Makes code maintenance more efficient and logical to follow Begin with the 'func' keyword in python

Answer 64

Begin with the 'func' keyword in python

Question 65

In the function definition, arguments or parameters are passed between what two characters? ( ) [ ] { } | |

Answer 65

( )

Question 66

What is the output of the following? def func(num1, num2): if num1 == 0: return num2 else: return func(num 1 -1, num2 + num2) print (func(4 - 7)) 11 14 17 3

Question 67

What is the default return data type for a function that does NOT use the return keyword? int boolean None string

Answer 67

None

Question 68

If a variable is defined within a function, what is the scope of a variable? Local Enclosing Global Built-In

Answer 68

Local

Question 69

Which is NOT present in the header of the function definition? function name parameter list 'def' starts and ':' ends return value

Answer 69

return value.encode())

Question 70

Recursion is calling an instance of a function on an instance of itself. True or False

Answer 70

True

Question 71

What keyword do we use to define our own object in python and apply OOP? def class methods attributes

Answer 71

class