Data types, variables, basic input-output operations, basic operators

Question 1

What is a function able to do?

Answer 1

• cause some effect
• evaluate a value and return it as the functions result

Question 2

What is the function invocation?

Answer 2

The function name along with parentheses and arguments

Question 3

What happens when python encounters an invocation? e.g. funct_name(argument)

Answer 3

• check if the name if legal
• check if function requirements for arguments allows you to invoke the function in this way
• leaves your code and jumps into function you want to invoke
• executes code, causes desired effect
• returns to your code

Question 4

Does python allow more than one instruction in a line?

Answer 4

No

Question 5

How do you create a new line in python?

Answer 5

\n

Question 6

What is the escape character?

Answer 6

\

Question 7

What are the two ways of passing arguements?

Answer 7

Positional way and keyword arguments

Question 8

What are they elements and one rule for the keyword argument?

Answer 8

Elements = keyword, equal sign and value
Rule = have to be put after the last positional argument

Question 9

What are the two keyword arguments for print?

Answer 9

end and sep

Question 10

What is a positional argument?

Answer 10

Ones whose meaning is dictated by their position

Question 11

What is a keyword argument?

Answer 11

Ones whose meaning is not dictated by their location, but by a special word (keyword) used to identify them

Question 12

What is a literal?

Answer 12

A literal is data whose values are determined by the literal itself.

Question 13

How are numbers handle by computers?

Answer 13

Integers (no fractional part)
Floating point numbers

Question 14

What is the numeric type?

Answer 14

The characteristic of the numeric value which determines its kind, range, and application

Question 15

What is the prefix for octal numbers?

Answer 15

0o (zero - o)

Question 16

What is the prefix for hexadecimal numbers?

Answer 16

0x (zero - x)

Question 17

Other than a . what else can make a number a float?

Answer 17

e (exponential)

the exponent (the value after the E) has to be an integer;
the base (the value in front of the E) may be an integer

Question 18

What are python literals?

Answer 18

Integers
Floats
Strings
Boolean values

Question 19

What is an operator?

Answer 19

An operator is a symbol of the programming language, which is able to operate on the values.

Question 20

If you multiply an integer by a float the answer is a …

Answer 20

float

Question 21

The result produce by a division operator is always …

Answer 21

a float

Question 22

What does the // operator do?

Answer 22

It is integer division.
it round the integer to the lesser integer value (floor division)

e.g.
6 // 4 = 1
-6 // 4 = -2 (cos -2 is the lesser value closest to -1.5
)

Question 23

What does the % operator do?

Answer 23

Modulo operator
The result of the operator is a remainder left after the integer division.

14 // 4 gives 3 → this is the integer quotient;
3 * 4 gives 12 → as a result of quotient and divisor multiplication;
14 - 12 gives 2 → this is the remainder.

Question 24

What are the two type of operator?

Answer 24

Unary and binary

Question 25

What is operator priority?

Answer 25

1 **
2 +, - (note: unary operators located next to the right of the power operator bind more strongly) (unary)
3 *, /, //, %
4 +, - (binary)

Question 26

What is operator binding?

Answer 26

Determines the order of computations performed by some operators with equal priority, put side by side in one expression.

** right sided binding
// left sided binding

Question 27

What is operator binding?

Answer 27

Determines the order of computations performed by some operators with equal priority, put side by side in one expression.

** right sided binding
// left sided binding

Question 28

What does a python variable have?

Answer 28

A name and a value

Question 29

What can’t you name a variable or functions?

Answer 29

a number
a reserved keyword
must not have spaces

Question 30

What is the equal sign?

Answer 30

An assignment operator

Question 31

How can this be rewritten?
variable = variable op expression

Answer 31

variable op= expression

Question 32

What is a remark that is omitted at run time?

Answer 32

a comment

Question 33

Name two functions of python comments

Answer 33

• make code easier to understand
• disable pieces of code that aren’t currently needed

Question 34

What does the input function do?

Answer 34

The input() function is able to read data entered by the user and to return the same data to the running program.

Question 35

What is a deaf program?

Answer 35

A program which doesn’t get a user’s input

Question 36

What two operators can be used on strings?

Answer 36

+ and *

Question 37

What do you have to be careful with the input function?

Answer 37

If the input is not converted to float or int it is STRING
x = input(4)
y=input(6)
print(x+6)
‘46’