Midterm

Question 1

Define:

Int
Float
Type

Answer 1

Int is an integer
Float is a decimal point
Type is for datatypd

Question 2

Operator vs operand

Does programming follow operator precedence

Answer 2

Operators are +, ×, ÷, etc
Operands are numbers
Yes it follows operator precedencd

Question 3

Define:

**
/
//
\

Answer 3

** is to the power
/ is float division
// is integer division
\ is line continuation

Question 4

Decimal vs binary

Answer 4

Decimal is base 10

Binary is base 2

Question 5

Base 2 vs base 10

Answer 5

Base10 is decimal

Base 2 is binary

Question 6

()
[]
{}
>>>
#

Answer 6

() are parentheses 
[] are brakets
{} are braces
>>> is a prompt
# is a comment

Question 7

Syntax error vs semantic error

Answer 7

Syntaxes error: type smt that is not valid

Semantic error: you tell python to do smt it can’t do

Question 8

Why do software updates occur?

Answer 8

1. New features were added

2. Bugs were fixed

Question 9

How many symbols does base 10 and base 2 have?

Answer 9

Base 10 has 10 symbols

Base 2 has 2 symbols

Question 10

Which is positive and negative?

Answer 10

0 is positive

1 is negative

Question 11

8 bits is a ____

4 bits is a___

Answer 11

8 is a byte

4 is a nibble

Question 12

How is data stored I a computer?

Answer 12

Data is stored in binary digits (bits) I fixed-size cells

Question 13

How to do binary to decimal?

Answer 13

5432

5x2^3 +4×2^2 + 3×2^1 +2×2^0 = all added up

Question 14

What numbers do cells contain?

Answer 14

Patterns of 0 and 1. So if we add 1+1 it gets added up to 0 and the 1 gets carried

Question 15

Define

EOL
len()
Ord()

Answer 15

EOL is end of line
Len() is length of a string that can be added and multiplied.
Ord() converts characters to numbers

Question 16

Which one is a space and which one of not a space?

Answer 16

+ is no space

, is a space

Question 17

FDR

Answer 17

1. Examples
2. Header
3. Description
4. Body
5. Test

Question 18

What is a string?

Answer 18

A sequences of characters, digits and symbols. String always has ‘’ around the string.

Question 19

Paramter vs argument

Answer 19

parameter: the variable in the function’s definition
argument: The actual value that gets passed to the function when it is called

Question 20

How many spaces are in an indent?

What is the result of no return function

Answer 20

4 spaces

result = none

Question 21

What is a Concention?

Answer 21

written in caps and underscores for names of constants defined outside there function

Question 22

what must variables beguin with?

Answer 22

Variable names must begin with a letter or underscores and are made up of letters, numbers and underscores

Question 23

Give an example of a Augmented assigned statement.

Answer 23

x+=4

Question 24

// vs / and rounding
%

Answer 24

// is integer division (round down)
/ is float division
% is the remainder (will match the sign of the second operand)

Question 25

The first line of a function definition is called the

Answer 25

function header

Question 26

The function’s return statement is part of the function’s____

Answer 26

body

Question 27

Function definition vs Function call

Answer 27

Function definition: header and body of a function

Function call: Invocation of a function to execute it

Question 28

What are the three components of a floating point number, when stored in binary?

Answer 28

exponent, mantissa, sign bit

Question 29

What is a bug?

Answer 29

An error that causes the program to abort (or crash)

An error that does not cause the program to abort, but produces incorrect results.

Question 30

Unsigned range

Answer 30

0 to 2^k -1

Question 31

signed magniture

- how many representations of 0?

Answer 31

2 representations of zero

Question 32

2’s compliment range

- how many representations of 0?

Answer 32

-2^(k-1) to 2^(k-1) -1

1 representation of zero.

Question 33

How to find the different amount of possible values?

Answer 33

2^k

Question 34

what does ord(_) do?

what does str(_) do?

Answer 34

it converts characters to numbers

it converts numbers to str

Question 35

What are boolean operators/logical operator?

Answer 35

and, not, or

Question 36

Relation vs arithmetric operators

Answer 36

relation: =, <=, >=
arithmetic: x, %, /, //, etc

Question 37

What is the order of precedence between operators?

Answer 37

1. Arithmetic
2. relation
3. boolean

Question 38

How do the indices of lists work?

Answer 38

it starts from 0 to n-1

Question 39

what is the symbol for:

1. empty list

Answer 39

1. []

Question 40

Indicate which Python data types are mutable:
int
float
str
list

Answer 40

string

Question 41

Which of the following are iterable data?
int
float
Boolean
list 
str

Answer 41

lst + str

Question 42

What do while-loops do?

Answer 42

Repeat a chunk of code until a condition is false

Question 43

To repeat a fixed number of times, use:

Answer 43

for-loops

Question 44

To repeat until a particular condition is False, use:

Answer 44

while-loops

Question 45

is 1 and 0 true or false?

Answer 45

true = 1
false = 0