Quiz 2

Question 1

What is an f-string? and what’s it used for?

Answer 1

Formatted string literal - used to format output of expressions

Question 2

What is a statement

Answer 2

programming instruction

Question 3

What is an expression

Answer 3

Code that returns a value (eg. calculations)

Question 4

What is an assignment

Answer 4

A new variable is assigned

Question 5

What is a string literal

Answer 5

Text enclosed in quotations

Question 6

What does an object represent

Answer 6

A value (eg. in x=4, 4 is automatically created as an object)

Question 7

What does immutable mean? What is mutability?

Answer 7

Immutable means it can’t be changed. Mutability is on object’s ability to be changed.

Question 8

Which data types are mutable

Question 9

Which data types are immutable

Answer 9

strings and integers

Question 10

What is a literal?

Answer 10

A specific value

Question 11

What is a logical operator/boolean logic?

Answer 11

Treats operands as True or False (for example, x>4 -> True).

Question 12

What are the three examples of logical operands?

Answer 12

And, or, not

Question 13

What is a while loop (difference between that and a for loop?)

Answer 13

Loop that goes until we reach a condition
NEED TO ADD AN ITERATOR (i-0)
Could continue forever (for loop has a range)

Question 14

What is a for loop (difference between that and a while loop?)

Answer 14

Loop that has an end
Automatically puts in the iterator
Has a range (while loop could continue forever)

Question 15

what is a modulus (example)

Answer 15

%
division with a remainder
ex: 7%2 = 1

Question 16

== vs =

Answer 16

== - checking IF something is true (x==5, does x equal 5?)
= - this IS true (ex: x=5)

Question 17

What is a value?

Answer 17

Content being stored (types: strings, integers…)

Question 18

What is a float

Answer 18

decimal

Question 19

What is an integer?

Answer 19

whole number

Question 20

What does // do?

Answer 20

how many times the divider can fit in
ex: 5//2 = 2
2 can fit in 5 twice

Question 21

What is pseudocode

Answer 21

Explanation in sentences

Question 22

Do you need to add an iterator for a for loop?

Answer 22

No! (automatically knows)

Question 23

what happens if we had a break into the loop?

Answer 23

It skips the else statement

Question 24

What does n += 1 mean?

Answer 24

n = n + 1

Question 25

what is len ( ) used for?

Answer 25

finding the length of a string

Question 26

What does a 0 indexed language mean?

Answer 26

python starts from 0 when counting (not from 1)

Question 27

What is included in this range? for i in range (0, 5)

Answer 27

0, 1, 2, 3, 4

Question 28

what does the escape sequence \n do? ex: print("My name...\nIs John..")

Answer 28

makes a newline Ex: My name... Is John..

Question 29

What does the escape sequence \t do? ex: print("1. Bake cookies\n\t1.1. Preheat oven")

Answer 29

Tab (indent) 1. Bake cookies (tabed)1.1. Preheat oven

Question 30

What is a raw string? ex what will this print out?: raw_sequence = r' Hello, my name is \n Lydia' print("raw_sequence")

Answer 30

when escape sequences are ignored ex: Hello, my name is \n Lydia

Question 31

What does the escape sequence \\ do? ex what will this print out?: print("\\home\\users\\")

Answer 31

prints a \ ex: \home\users\

Question 32

What does the escape sequence \' do? ex what will this print out?: print("Name: John O\'Donald")

Answer 32

prints a single quote ' Name: John O'Donald

Question 33

What does the escape sequence \" do? ex what will this print out?: print("He said, \"Hello friend!\"")

Answer 33

prints a double quote " He said, "Hello friend!"

Question 34

What does ord ( ) do?

Answer 34

returns encoded integer value for a string of length one ex: ord('A') = 65

Question 35

What does chr( ) do?

Answer 35

returns a string of one character for an encoded integer ex: chr('65') = A

Question 36

What are the 4 types of f-strings (that we're using)?

Answer 36

d - Decimal (for integer values only) e - Exponent notation f - Fixed point notation s - string (default presentation type)

Question 37

What is :d specification What will this print? ex: number = 4 print(f' {number:d} ' )

Answer 37

d - Decimal (integer values only) will print: 4

Question 38

What is :e specification what will this print? ex: number = 44 print(f' {number:e} ' )

Answer 38

e - exponent notation will print: 4.400000e+01

Question 39

What is :f specification what will this print? ex: number = 4 print(f' {number:f} ' )

Answer 39

f - fixed-point notation will print: 4.000000

Question 41

What is in an advanced f-string? (f"{Expression:[fill][Align][Sign][Width][.Precision][type]}

Answer 41

my_num = 123.987 ex: (f"{my_num:+08.2f}") print: +0123.99 fill - 0's or white spaces align - sign to know where the answer goes (don't worry about this as much) sign - adding a +/- in front width - how many spots there are (ex: 8) .Precision - how many decimals type - f, s, d, e

Question 42

What does print( ) do?

Answer 42

Prints a newline (same as \n)