Revision w6-w15

Question 1

assignment operator

Answer 1

=

Question 2

To define a variable you must ..?

Answer 2

The name of the variable

The initial value of the variable

Question 3

Any words that are reserved for special

purposes in a computer language

Answer 3

Reserved words

Question 4

Name Python’s data types:

Answer 4

int, float, string, complex numbers and Boolean

Question 5

True or False?

The data type is associated with the value, not the variable

Answer 5

True

Question 6

Is Python a dynamically or statically typed language?

Answer 6

Python is a dynamically typed language, in other words, the

variables data type can change during runtime

Question 7

num=1
str=’s’
num2=2

satuation1: num + s
satuation2: num + num2

what is the output?

Answer 7

1: error
2: 3

Question 8

Can a constant value change?

Answer 8

Yes

Question 9

Is Python a interpreted or compiled language?

Answer 9

Python is an interpreted language —it does not use a compiler.

Question 10

What is the difference between ‘/’, ‘//’ and ‘%’?

Answer 10

/ --> prints float
//--> (Floor division) discards the fractional part
% --> (modulus division), return the remainder

Question 11

What is the difference between ‘*’ and ‘**’?

Answer 11

• –> multiplication

* * –> power

Question 12

The values passed to the function.

Answer 12

Arguments

Question 13

What are the four ways to import sqrt() from math:

Answer 13

1- from math import sqrt
2- import math –> math.sqrt()
3- import math as m –> m.sqrt()
4- from math import ∗ (imports all functions, but it is not recommended)

Question 14

Formatting:

Answer 14

age = 18
num=1
print( f “Im { age } today ” )
print(f“ Cost {age + num}”)

Question 15

Formating

Answer 15

look w-8a Page-8 to 11 VERY IMPRTANT INFO

Question 16

Strings are right justified by default

TRUE OR FALSE?

Answer 16

FALSE

Question 17

num > num2 + 1
The comparison operators have higher precedence than arithmetic operators?
TRUE OR FALSE?

Answer 17

FALSE

Calculations are done before the comparison

Question 18

How to print ‘’ or ‘?

Answer 18

’ “ ‘ OR “ ‘ “. They must be opposite

Question 19

What will be printed?
name = ‘Rand’ + ‘AB’
name2 = ‘Rand’, ‘AB’

Answer 19

name = RandAB
name2 = Rand AB

Question 20

What is concatenating strings?

Answer 20

str1 + str2

using (+) to connect strings

Question 21

a sequence of characters used inside a

string literal that translates into another character

Answer 21

An escape sequence ()
\n
\t
\

Question 22

Can you use (< or >, like str[1] > str[2]) with letters?

Answer 22

Yes.

space then numbers then uppercase then lower

Question 23

Method vs Function

Answer 23

Unlike a function, a method can only be applied to an object
of the type for which it was defined
Methods are specific to a type of object

Question 24

String methods:

Answer 24

upper() and lower()
replace(old, new) ->
Ex: name . r e p l a c e ( “ ohn ” , “ames ” )

Question 25

while-loops can be controlled by?

Answer 25

An event
A counter
A sentinel value.
A flag variable (boolean)

Question 26

a special value (or character) used to

terminate a loop

Answer 26

A sentinel value.
For numeric input of positive numbers, it is common to use
−1

Question 27

A for-loop:

Answer 27

• The number of iterations is known in advance.

- can be used to iterate over a container.

Question 28

A segment of code that performs a specific task

Answer 28

A function

Question 29

Before you implement your function:

Answer 29

know what the function should do, the inputs and what it returns.

Question 30

Parameter Vs Argument

Answer 30

Parameter -> coder

Argument -> user

Question 31

variables used to

pass values to a function

Answer 31

parameters

Question 32

Do not modify parameter variables!!!!!

Answer 32

.

Question 33

how to return more than one value?

Answer 33

def function():
    return x1, x2

num1, num2 = function()

Question 34

The function can generate output even when it doesn’t have a
return value
True OR False?

Answer 34

True

Question 35

You cannot use the return statement without a value

True OR False?

Answer 35

False. you can, it will terminate the function

Question 36

When function definition order does and doesn’t matters

Answer 36

matters: when they aren’t inside the main()

doesn’t matter: when they are inside the main()

Question 37

An easy way to add a block of a list’s values? ex, to add from index 5 to index 17

Answer 37

sum(lst[ 5 : 18 ])