ITlec Prelims pt1

Question 1

Who created python?

Answer 1

Guido Van Rossum

Question 2

When was python created?

Answer 2

1991

Question 3

What is python used for?

Answer 3

web development (server-side),
software development,
mathematics,
system scripting.

Question 4

Whenever you are done in the python command line, you can simply type __________ to quit the python command line.

Answer 4

exit()

Question 5

*indicate a block of code.

Answer 5

Indentations

Question 6

Comments start with a ______, and Python will render the rest of the line as a comment

Answer 6

#

Question 7

A _________ is created the moment you first assign a value to it.

Answer 7

variable

Question 8

Rules of variables

Answer 8

• Must start with letter or underscore
  -can’t start with number
  -can only contain alpha numeric and underscore

Question 9

There are three numeric types in Python:

Answer 9

*int
*float
*complex

Question 10

is a named place in the memory where a programmer can store data and later retrieve the data using the variable “name”

Answer 10

variable

Question 11

You can change the contents of a variable in a later statement
T or F

Answer 11

T

Question 12

We assign a value to a variable using the ________?

Answer 12

Assignment statement (=)

Question 13

Order of operation for python

Answer 13

Pemdas
Parenthesis
Exponent
multiplication, division, and remainder
Addition subtraction
(from left to right)

Question 14

When writing code - use __________

Answer 14

parenthesis

Question 15

You can also use str() and float() to convert between strings and integers

True or False

Answer 15

False
int() and float()

Question 16

you will not get an error if the string does not contain numeric characters while converting to int or float

T or F

Answer 16

F
You will get an Error

Question 17

used to output variables

Answer 17

print()

Question 18

execution of code statements (one line after another) – like following a recipe

Answer 18

Sequential

Question 19

used for decisions, branching – choosing between 2 or more alternative paths.

Answer 19

Selection

Question 20

used for looping

Answer 20

repetition

Question 21

Recall that Python has a type called __________, which can take two possible values, True and False

Answer 21

boolean

Question 22

An expression that evaluates to a true/false value is called a

Answer 22

Boolean expression

Question 23

Python, decisions are made with the ___________, also known as the __________________.

Answer 23

if statement
selection statement

Question 24

If the boolean expression evaluates to TRUE, then the block of statement(s) inside the if statement is executed. If boolean expression evaluates to FALSE, then the first set of code after the end of the if statement(s) is executed

T or F

Answer 24

T

Question 25

can be followed by an optional else statement, which executes when the boolean expression is FALSE.

Answer 25

An if statement

Question 26

contains the block of code that executes if the conditional expression in the if statement resolves to 0 or a FALSE value.

Answer 26

else statement

Question 27

allows you to check multiple expressions for TRUE and execute a block of code as soon as one of the conditions evaluates to TRUE.

Answer 27

The elif statement

Question 28

allows us to execute a statement or group of statements multiple times

Answer 28

loop statement

Question 29

Repeats a statement or group of statements while a given condition is TRUE

Answer 29

while loop

Question 30

The loop iterates while the condition is false. When the condition becomes true, program control passes to the line immediately following the loop. T or F

Answer 30

F Loop iterates when condition is true

Question 31

A loop becomes ____________ if a condition never becomes FALSE.

Answer 31

infinite loop

Question 32

If the _________ statement is used with a for loop, the ____ statement is executed when the condition becomes false.

Answer 32

else

Question 33

Executes a sequence of statements multiple times and abbreviates the code that manages the loop variable.

Answer 33

For loop

Question 34

is a block of organized, reusable code that is used to perform a single, related action.

Answer 34

A function

Question 35

The code block within every function starts with a ___________ and is ___________

Answer 35

colon (:) and is indented.

Question 36

The statement __________ exits a function, optionally passing back an expression to the caller

Answer 36

return [expression]

Question 37

A return statement with no argument returns an error

Answer 37

False It returns as None

Question 38

______________ can be accessed only inside the function in which they are declared,

Answer 38

local variables

Question 39

__________ can be accessed throughout the program body by all functions.

Answer 39

global variables

Question 40

is a Python object with arbitrarily named attributes that you can bind and reference.

Answer 40

A module

Question 41

You can use any Python source file as a module by executing an _______________ in some other Python source file.

Answer 41

import statement

Question 42

The ________ built-in function returns a sorted list of strings containing the names defined by a module.

Answer 42

dir()

Question 43

powerful and flexible data structure in python that allows you to store and manipulate collections of elements

Answer 43

Lists

Question 44

Python lists can grow or shrink in size as needed making them flexinle for handling varying amounts of data

Answer 44

Dynamic storage and retrieval

Question 45

Lists are commonly used in _____ to iterate over the elements and perform operations on them

Answer 45

loops

Question 46

to create a python list you need to use ____

Answer 46

[] square brackets

Question 47

List elements are accessed using their ________

Answer 47

indices

Question 48

the indices start from ____ for the first elements

Answer 48

0

Question 49

Lists can store elements of any data types T or F

Answer 49

True

Question 50

This list function return the number of elements present in a list

Answer 50

len()

Question 51

allows you to add an element at the end of the list

Answer 51

append()

Question 52

adds elements from another list to the end of the current list.

Answer 52

extend()

Question 53

allows you to insert an element at a specific index in the list

Answer 53

insert()

Question 54

function is used to remove the first occurrence of a specified element from the list

Answer 54

remove()

Question 55

used to remove and return the element at a specific index in a list

Answer 55

pop()

Question 56

removes all elements from the list

Answer 56

clear()

Question 57

returns the index of the first occurrence of a specified element in the list

Answer 57

index()

Question 58

returns the number of occurrences a specific element in the list

Answer 58

count()

Question 59

used to sort in the list ascending order.

Answer 59

sort()

Question 60

reverses the order of elements in the list

Answer 60

reverse()

Question 61

creates a shallow copy of the list

Answer 61

copy()

Question 62

provide a powerful set of tools for manipulating and managing lists

Answer 62

list functions

Question 63

a concise and pythonic way of generating lists

Answer 63

List comprehension

Question 64

List comprehension does not allow it to be nested T or F

Answer 64

F it is allowed to be nested to allow complex lists

Question 65

is used to apply the int() function to each element to in the input list

Answer 65

map()

Question 66

used to include only certain elements

Answer 66

filter()

Question 67

this is generally faster and more efficient compared to traditional loops when dealing with simple operations on lists

Answer 67

List comprehension

Question 68

an ORDERED collection of elements enclosed in parentheses ()

Answer 68

Tuples

Question 69

Tuples are immutable True or false

Answer 69

True

Question 70

Elements cannot be modified once they are defined

Answer 70

Immutable

Question 71

tuples are typically created by enclosing elements within ____ and separating them with _________

Answer 71

parentheses () Comma ,

Question 72

Individual elements within a tuple can be accessed using __________

Answer 72

indexing

Question 73

involves creating a tuple by assigning values to it

Answer 73

tuple packing

Question 74

allows you to assign individual elements of a tuple to separate variables

Answer 74

tuple unpacking

Question 75

Tuples can be concatenated using the "*" operator? T or F

Answer 75

False you use "+"

Question 76

Tuples can be repreated using the "x" operator T or F

Answer 76

False you use the "*"

Question 77

to check if an element exists in a tuple use the _____ keyword

Answer 77

in

Question 78

tuples are _______, meaning their element cannot be changed after creation

Answer 78

immutable

Question 79

you can convert lists and vice versa using the list() and tuple() function T or F

Answer 79

True

Question 80

Functions can only return single values as a tuple T or F

Answer 80

False it can return multiple values

Question 81

is an immutable unordered collection of UNIQUE elements

Answer 81

set

Question 82

Sets are widely used for performing ___________ such as union, intersection and difference

Answer 82

mathematical set operations

Question 83

sets can be created using _________

Answer 83

curly braces {}

Question 84

You can use this function to add a single element in a set

Answer 84

add()

Question 85

you can use this fucntion to add multiple elements in a set

Answer 85

update()

Question 86

removes specified element from the set if it does not exist it will raise an error

Answer 86

remove()

Question 87

this removes an element and if it does not exist it will not raise an error

Answer 87

discard()

Question 88

removes a random item from a set

Answer 88

pop()

Question 89

This set operations combines returns a combination of two sets

Answer 89

Union

Question 90

symbol of union

Answer 90

|

Question 91

This set operation return what's common between two sets

Answer 91

Intersection

Question 92

Symbol of intersection

Answer 92

&

Question 93

returns the difference between 2 sets or more

Answer 93

difference

Question 94

symbol of difference

Answer 94

-

Question 95

returns what is unique in both sets

Answer 95

Symmetric difference

Question 96

symbol of symmetric difference

Answer 96

^

Question 97

to test if a set is a subset use

Answer 97

issubset()

Question 98

to test if a set is a superset use

Answer 98

issuperset()

Question 99

Sets only store unique elements, you can use them to store duplicates. T or F

Answer 99

True

Question 100

Allows you to store and retrieve data in key-value pairs

Answer 100

Dictionary

Question 101

Another name of dictionary

Answer 101

Associative array or hash table

Question 102

T or F Dictionary is an ordered collection

Answer 102

F it is unordered

Question 103

Dictionary key must be ______ and ______

Answer 103

unique and immutable

Question 104

Dictionaries are created using

Answer 104

{} curly braces

Question 105

To retrieve the value associated with a specific key use the _________

Answer 105

square bracket [] with the key inside

Question 106

If you try to access a key that does not exist it will raise an index error T or F

Answer 106

F it will raise a KeyError

Question 107

You can use the ______ method which returns a default value if they key is not found

Answer 107

get()

Question 108

to remove an element from the dictionary you can use the

Answer 108

pop() or del Keyword

Question 109

to copy a dictionary use

Answer 109

copy() or dict() constrictor

Question 110

the most common approach is to loop through its keys T or F

Answer 110

T

Question 111

How is dict separated

Answer 111

it is separated by colon (:), and the elements are separated by commas (,)