Data Types and Structures

Question 1

What is an Integer Data Type classified by?

Answer 1

An integer is a data type which is a number without a decimal point and is defined by the function int().

Question 2

What is an Float Data Type classified by?

Answer 2

A float is a data type which is a number with a decimal point and is defined by the function float().

Question 3

Which function can be used to find out which data type is a certain value?

Answer 3

You can use the type() function.

Question 4

What happens when you use the int() function on a float value?

Answer 4

The value after the decimal point is taken off and no rounding occurs.

Question 5

What happens when you use the float() function on an integer value?

Answer 5

A decimal point and a 0 is appended onto the number.

Question 6

What is a boolean?

Answer 6

A boolean is a data type that can have a value of true or false. (Created by George Bool, Boolean Algebra)

Question 7

What does != mean?

Answer 7

!= means not equal to. (Comparison Operator)

Question 8

What type of operators are and, not and or?

Answer 8

Logical Operators

Question 9

What is a string classified by?

Answer 9

It is classified by double or single quotes.

Question 10

How do you tell Python that this quote is in the string not the syntax?

Answer 10

By using a backslash. ()

Question 11

What is the symbol to add and multiply strings?

Answer 11

+ for addition; * for multiplication

Question 12

How can you reference the first item of a list?

Answer 12

print(list_name[0])

Question 13

How can you reference the last item of a list?

Answer 13

print(list_name[-1]) (Not print(list name[-0])

Question 14

What code do you use to slice the list from index 5 to 9?

Answer 14

print(list_name[5:9])

Question 15

What is a tuple?

Answer 15

A data type for immutable ordered sequence of elements.

Question 16

What is a set?

Answer 16

A data type for mutable unordered collections of unique elements.

Question 17

What is a list?

Answer 17

A data type for mutable ordered list of data

Question 18

Is a string mutable?

Answer 18

No, a string is an immutable ordered data type.

Question 19

What is a dictionary in Python?

Answer 19

A dictionary is a data type for mutable objects that store mapping s of unique keys to values.

Question 20

What is the syntax of a dictionary?

Answer 20

dictionary_name = {value:key, value:key, value:key}

Question 21

How do you print the value with a given key in a dictionary?

Answer 21

print(dictionary_name[key])

Question 22

How do you add value with a given key in a dictionary?

Answer 22

dictionary_name[New_Key] = New_Value

Question 23

How do you find if an element is in a list.

Answer 23

print(key in dictionary_name)

Question 24

What are the two identity operators?

Answer 24

is: evaluates if both sides have the same identity;

evaluates if both sides have different identities