Values and Variable

Question 0

Define value

Answer 0

A number or letter

Question 1

What are five type of values?

Answer 1

• integer
• floating-point number
• string
• list
• bool

Question 2

Type(2)

Answer 2

Class ‘int’

Question 3

Type(‘Hello,World!’)

Answer 3

Class’str’

Question 4

Type (‘2’)

Answer 4

Class’str’

Question 5

Is 42.0 a integer, floating-point number or a string?

Answer 5

Floating-point number

Question 6

What are the five conditions of creating a variable?

Answer 6

• cannot contain spaces
• can contain letters or numbers or both
• cannot begin with a number
• underscore (____) character are allowed
• cannot contain Python’s keywords

Question 7

What are 27 Python keywords?

Answer 7

False, none, True, and, as, assert, break, class, continue, def, del, elif, else, except, finally, for, from , global, if, import, in, is, lambda, nonlocal, not, or, pass, raise , return, try, while, with, yield

Question 8

Define reassignment

Answer 8

Reassigning a variable with a new value. Ex. A=4. After reassigning A, now A=6

Question 9

In Python, is equality a symmetric relationship? Why?

Answer 9

No because a=7 but 7=a is wrong. Variable cannot begin with a number

Question 10

Define update

Answer 10

New value of variable depends on the previous value

Question 11

Define initialize

Answer 11

To begin or start

Question 12

Fun fact: example of update
»> x=2
»> x=x+1

Answer 12

Wow

Question 13

Define increment

Answer 13

Updating a variable by adding 1

Question 14

Define decrement

Answer 14

Updating a variable by subtracting 1

Question 15

Why do we use variables in computers?

Answer 15

To make a computer manipulate data, we must tell the computer to remember the data by using variable

Question 16

Define variable (3 definitions)

Answer 16

• Memory(RAM) location
• to which we give a name
• to which we assign a value of a particular data type

Question 17

Define floating-point number

Answer 17

Number with sig figs or with decimals

Question 18

What are the two conventional ways to name a variable?

Answer 18

1. Camelcase ex.finalLetterGrade

2. Use underscore between words. Ex.final_letter_grade

Question 19

Is Python case sensitive?

Answer 19

Yes

Question 20

Define operator

Answer 20

Special symbols that represent computation like multiple or add

Question 21

What are examples of operators?(add,subtract,multiple, divide, and exponent)

Answer 21

\+=add
-= subtract
*= multiple
/= float/normal divide
**= exponent

Question 22

Define assignment statement

Answer 22

Creates a new variable with a new value.

Ex. A= 7

Question 23

Define state diagram

Answer 23

Create a new variable with a new value using arrows

Ex. A —> 7

Question 24

Define expression

Answer 24

A combination of values, variables and operators

Question 25

Define statement

Answer 25

A unit of code that has an effect like creating a variable or displaying a value

Question 26

What does a newline look like?

Answer 26

\n

Question 27

What is an example of a strongly-typed high level language?

Answer 27

C or C++

Question 28

What is an example of a weakly-type high level language?

Answer 28

Python

Question 29

What does GPS stand for in programming?

Answer 29

Good programming style

Question 30

Define weakly-type high level language

Answer 30

You can store any value in a variable

Question 31

Define strongly-type high level language

Answer 31

Must state the type of value before assigning a variable with a value.

Question 32

What is the advantage of strongly-type high-level language versus weakly-type?

Answer 32

Weakly-type high level language are error-prone

Question 33

Does Python automatically follow order of operations?

Answer 33

Yes

Question 34

What does this symbol # mean in programming and what is its purpose?

Answer 34

means comments and it is good for explaining what the program does

Question 35

Define concatenate

Answer 35

To join two operands end-to-end

Question 36

Define exception

Answer 36

An error that is detected while the program is running

Question 37

Define semantics

Answer 37

Meanings of a program

Question 38

Define semantic error

Answer 38

An error within the program that makes it do something other than what the programmer intended

Question 39

What is the symbol for floor division and what does it do?

Answer 39

// is the symbol for floor division l and rounds the number into an integer.

Question 40

What is the symbol for modulus and what does it do?

Answer 40

% is the symbol for modulus and it divides two numbers and shows the remainder. Ex. 105%60 = 45

Question 41

Define hand trace

Answer 41

Predicting the results of our code without the use of computer

Question 42

What are 6 categories of statement?

Answer 42

``` Assignment statement Input statement Output statement Operational statement Iterate statement Conditional statement ```

Question 43

True or false? Prompt must be a string

Answer 43

True

Question 44

What are three conversion functions?

Answer 44

Int() Float() Str()

Question 45

Define operand

Answer 45

Number being used in a operation

Question 46

What does the built-in function look like for assignment statement?

Answer 46

Variable=value

Question 47

Define argument

Answer 47

Data we want the function to use and act upon

Question 48

What does the built-in function look like for input statement?

Answer 48

Input (prompt)

Question 49

What does the built-in function look like for output statement?

Answer 49

Print (argument)

Question 50

What does the built-in function look like for operational statement?

Answer 50

(Operand)(operator)(operand)

Question 51

Which is a literal value? | A= 7

Answer 51

7

Question 52

What are three type of errors?

Answer 52

- Syntax error - Runtime error - Semantic error

Question 53

What is a Syntax error

Answer 53

Occurs when our Python code does not follow the Syntax rule

Question 54

What is the runtime error?

Answer 54

Occurs when the user enters an invalid test data

Question 55

What are two things that the test case contains?

Answer 55

- Test data: specific values | - Expected result: must be computed beforehand

Question 56

Define returned values

Answer 56

When a function returns a result and that result is called a return value.

Question 57

Define string concatenation

Answer 57

Joins strings by adding or linking them end-to-end. Example: >>>"first"+"second" "Firstsecond"

Question 58

What is the result of this function and what is it called? | >>>"hi" * 3

Answer 58

"hihihi" | String repetition

Question 59

What does an index look like and what does it indicate?

Answer 59

[] expression in brackets. It indicates which character in the sequence you want

Question 60

Define string

Answer 60

It is a sequence of character

Question 61

What will happen as a result of this function and what is it called? >>>fruit=banana >>>letter=fruit[1]

Answer 61

>>>letter=fruit[1] "a" B in banana is considered the 0th letter while A is considered the 1st Function called an index

Question 62

What will happen as a result of this function and what is it called? >>>fruit=banana >>>letter=fruit[0]

Answer 62

>>>letter=fruit[0] "b" Function called an index

Question 63

True or false? Index can be any number

Answer 63

False. Index must be an integer.

Question 64

Define lens

Answer 64

Built-in function that returns the number of characters in a string Ex. >>>fruit="apple" >>>len(fruit) 5

Question 65

What is the result of the following and what is the function called? >>>word= hi >>>len(word)

Answer 65

>>>word= hi >>>len(word) 2 Len function

Question 66

Define slice

Answer 66

A segment of a string Example: >>> a="apple" >>>a[0:2] "Ap"

Question 67

What will happen to the following and what is it called? >>> a="apple" >>>a[:2]

Answer 67

"Ap" | String slicing

Question 68

What will happen to the following and what is it called? >>> a="apple" >>>a[2:]

Answer 68

"ple" | String slicing

Question 69

Define empty string

Answer 69

When first string index is greater or equal to the second index

Question 70

What will happen to the following and what is it called? Ex. >>> a=apple >>>a[3:3]

Answer 70

" " | Empty string

Question 71

What will happen to the following and what is it called? Ex. >>> a=apple >>>a[6:3]

Answer 71

" " | Empty string

Question 72

Define invocation

Answer 72

Method call

Question 73

How would we upper case our strings?

Answer 73

>>>word="hello" >>>print(word.upper()) "HELLO"

Question 74

How would we find certain character?

Answer 74

>>>word="apple" >>>hi=word.find("a") >>>print(hi) 0

Question 75

What is the result of the following? >>>word="apple" >>>hello=word.find("l",2) >>>print(hello)

Answer 75

>>>word="apple" >>>hello=word.find("l",2) #having more than one argument is called an optional argument >>>print(hello) 3

Question 76

What is 24.0//3?

Answer 76

8.0

Question 77

What kind of error involves "Maximum recursion depth exceeded error"?

Answer 77

Runtime error