Lessons 1 & 2

Question 1

What is a program?

Answer 1

a list of instructions for manipulating numbers or other symbols

Question 2

What is a computer?

Answer 2

a device that can follow the instructions in a program and carry out the manipulations

Question 3

What is the assignment operator in python?

Answer 3

=

Question 4

Define assignment operator

Answer 4

functions to assign a specific value to a variable

Question 5

What is the syntax for exponentiation?

Answer 5

**

Question 6

Define variable

Answer 6

can be thought of as a label for a container than refers to some kind of data or other info stored in a computers memory

Question 7

What are the containers that refer to some kind of data/info in a computers memory?

Answer 7

objects

Question 8

math defines a _____ for the functions in the math module

Answer 8

namespace

Question 9

how do you use ln in python?

Answer 9

import math
a = math.log(10)

Question 10

What is the class of values that are strings of text characters called?

Answer 10

strings

Question 11

How do you catenate two strings?

Answer 11

by using the * operator

Question 12

How do you determine what data type a variable is?

Answer 12

type(variable_name)

Question 13

What is an integer?

Answer 13

A number without a decimal

Question 14

What is a float?

Answer 14

A floating point number has a decimal

Question 15

What does a kernel do?

Answer 15

keeps track of variables and their assigned values and other info that defines the state of the notebook at any point

Question 16

String function

Answer 16

converts a numeric value (integer or float) to a string; str(5)

Question 17

Integer function

Answer 17

converts string to integer; int()

Question 18

Float function

Answer 18

converts strings representing numbers to floating point numbers; float(‘string’)

Question 19

What element of a string would strng[0] return? strng[1]?

Answer 19

first element; second element

Question 20

Extracting a subset of a string (or other multi-element object) is referred to as_____ and the result is called a _____

Answer 20

slicing; slice

Question 21

In a slice, the first number is the index of the _____ element in the substring; the second number in the brackets is _______

Answer 21

first; one more than. the index of the last element in the substring

Question 22

The last element in a string is identified by ____

Answer 22

-1

Question 23

negative step parameter

Answer 23

the slice will be returned in the reverse order

Question 24

The second parameter in a slice specifies

Answer 24

the element following the last element to be returned using the original numbering

Question 25

upper method

Answer 25

converts lowercase characters to uppercase; my_string.upper()

Question 26

find method

Answer 26

a string method that requires an argument; the argument is a search string and the returned value is the first location in the string object at which the search string is found

Question 27

find method using more than one argument

Answer 27

can take up to two optional integer arguments, following the string argument, to specify the region of the string to search

the second argument specifies the index of the position immediately following the the region to search

the indexes are separated by commas

Question 28

count method

Answer 28

requires a single string argument and can accept two optional integer arguments to specify to the scope of the search

Question 29

replace method

Answer 29

requires two input string arguments

searches the string to which it is applied for occurrences of the first argument and returns a new string with all the occurrences replaced with the second string argument

my_string.replace(‘Fred’, ‘Joe’)

Question 30

len function

Answer 30

not specific to strings.

a function that returns an integer that represents the number of characters in a string

len(my_string)