Ultimate Computer Science 30 Final Flashcards
To get that 100%
Used to enter data into the computer
Input Device
Accepts data from the CPU and produces an output
Output Device
Physical cable that carries bits of data
A flat ribbon cable or a cable into the motherboard
Bus
The main working memory of the computer
Software must be loaded into this to run
Random Access Memory (RAM)
Used for high-speed storage of frequently used data
Can be part of the CPU or motherboard
Cache Memory
communication with memory.
communicates with input and output devices through the buses.
controls the timing and flow of information.
carries out the computations that a program might require.
Central Processing Unit (CPU)
Usually includes the power supply
The Case
Most CPUs need this
Cooling Fan
The working memory of the computer
RAM
RAM speed is measured in
Megahertz (MHz)
Used for high-end graphics and video games
Video cards
A large printed circuit board.
Provides the connections and sockets that let other components communicate with each other.
Motherboard
Computer brain.
Microprocessor.
A chip containing millions of tiny transistors.
job is to perform the calculations necessary to make the computer work.
decision-maker.
CPU
Can read data stored in it, but cannot write new data
Read-only Memory (ROM)
Can read from and write to that memory
Random access memory (RAM)
the spine of the computer.
handles interactions between the software running on a computer and the machine hardware components.
Basic input/output system (BIOS)
supplies electricity throughout the rest of the computer.
shielded box containing a transformer
Power supply
Converts the incoming electricity into the proper voltage for each part of the machine needs electricity
Transformer
allows you to store info and apps directly on the computer
Hard drive
machines that let computers communicate with other computing systems
closely related to wireless cards
Modem
radio transceivers that can send and receive data through a specific frequency of radio waves
Wireless card
removable components designed to fit into expansion slot
Video card
Slots where you can add components to a PC that don’t have a designated slot somewhere on the motherboard
Expansion Slots
Responsible for processor, memory, device, and storage management, and application and user interface
Operation System (OS)
specialized processor with greater mathematical computing capabilities, making it perfect for computer graphics and machine learning activities
Graphics processing unit (GPU)
any piece of hardware that isn’t mounted inside a PC’s case
Peripherals
to properly remove heat from device components to improve device performance and extend its life.
incorporates a fan or other mechanism to reduce the temperature of a hardware component, such as a processor.
heat sink
How to draw line?
drawLine(x-start, y-start, x-end, y-end)
How to draw rectangle or square?
drawRect(x-top left corner, y-top left corner, width, height)
How to draw oval or circle?
drawOval(x-top left corner, y-top left corner, width, height)
How to draw an arc?
drawArc(x-top left corner, y-top left corner, width, height, starting angle of arc, total angle of arc)
How to put in text?
g.drawString(string. x-start, v-position)
Which of the following is NOT a valid type of comment in Python?
%% This is a comment
This is a comment
”””
This is a comment
“””
A
Which of the following best describes the main purpose of comments?
Comments create better spacing in programs.
Comments describe your program so other people can read it more easily.
Comments warn the people running the program about potential problems with the program.
B.
In the following line of code:
my_boolean = True and (10 / 0 == 0)
Will the 10 / 0 == 0 operation be evaluated?
Yes
No
A
Which of the following evaluates to the variable x rounded to two decimal places?
round(x, 2)
round(2, x)
round(x), 2
round(2), x
A
Fill in the blank with the best response:
Floating point numbers should be compared to determine if they are _______ equal to each other.
exactly
approximately
B
How many lines will this program print?
x = 10
while x > 0:
print x
x = x - 3
3
4
5
6
B
Which of the following best describes the purpose of a for loop?
A for loop is for doing something an indeterminate number of times.
A for loop is doing something an infinite number of times.
A for loop is for doing something a fixed number of times.
A for loop is for doing something three times.
C
Which Python keyword skips back to the beginning of a loop?
break
continue
B.
Which Python keyword exits a loop?
break
continue
A
What does the following program print?
for i in range(2):
for j in range(2):
print i + j
——
0
1
1
2
0112
0
1
0
1
0101
A
How many lines does the following program print?
for i in range(3):
for j in range(5):
print “hi”
3
5
8
15
D
Which of the following code samples correctly passes the number 10 as an argument to the function print_number?
print_number(10)
print_number()
print 10
10(print_number)
print print_number
print 10
A
Which of the following code samples correctly creates a function that takes a single parameter and prints it?
def print_number(x):
print x
def print_number():
print parameter
def print_number():
print x
def print(x)
A
Which of the following functions successfully returns the number 10?
def my_function():
10
def my_function(10):
return
def my_function():
return 10
def my_function():
print 10
C
Which of the following prints the letter A?
my_string = “ABCDE”
print(my_string[1])
my_string = “ABCDE”
print(my_string(0))
my_string = “ABCDE”
print(my_string(1))
my_string = “ABCDE”
print(my_string[0])
D
Which of the following prints CDE?
my_string = “ABCDE”
print(my_string[3:])
my_string = “ABCDE”
print(my_string[2:])
my_string = “ABCDE”
print(my_string[3:5])
my_string = “ABCDE”
print(my_string[2:4])
B
Which word applies to strings in Python?
mutable
immutable
B
What does immutability mean?
Strings in Python can be modified and replaced.
Strings in Python can be modified, but not replaced.
Strings in Python can be replaced, but not modified.
Strings in Python can be neither replaced nor modified.
C
Which operator allows you to create a string that is the result of putting two different strings together, side by side?
+
-
*
/
A
Adding two strings together to form one string is also called:
slicing
concatenating
gluing
looping
B
Which of the following programs DOES NOT PRINT the first five letters of the alphabet, each on its own line?
my_string = “abcde”
for letter in range(len(my_string)):
print(letter)
my_string = “abcde”
for letter in my_string:
print(letter)
my_string = “abcde”
for i in range(len(my_string)):
print(my_string[i])
A
What does len(“hello”) evaluate to?
“hello”
“h”
“—–”
5
D
What does the following program print?
print “a” in “banana”
True
False
1
“aaa”
A
What does the following program print?
x = “ab”
y = “banana”
print x in y
True
False
0
“ba”
B
Which of the following functions prints 3, and nothing else?
s = “hello”
x = s.find(“l”)
print x
s = “banana”
x = s.find(“a”)
print x
s = “hello”
for i in range(len(s)):
print i
s = “apple”
x = s.find(“l”)
print x
D
What does the following program print?
first_string = “hello”
second_string = first_string.upper()
print first_string
print second_string
——
hello
hello
hello
HELLO
HELLO
hello
HELLO
HELLO
B
Which of the following is NOT true about tuples?
Tuples are ordered.
Tuples are immutable.
Tuples can contain elements of different types.
Tuples use parentheses to access individual elements, rather than square brackets.
D
Which of the following is the correct way to declare a tuple?
x = (1, 2, 3)
x = [1, 2, 3]
A
Which of the following Python programs creates a list with the numbers 1 through 5?
my_list = (1, 2, 3, 4, 5)
my_list = [1, 2, 3, 4, 5]
my_list = 1, 2, 3, 4, 5
my_list = “1, 2, 3, 4, 5”
B
Which of the following code snippets will correctly convert a string to a list?
my_string = “hello”
str_as_list = list(my_string)
my_string = “hello”
str_as_list = listify(my_string)
my_string = “hello”
str_as_list = make_list(my_string)
my_string = “hello”
str_as_list = new_list(my_string)
A
my_list = [“bananas”, “oranges”, “grapes”, “pineapples”, “apples”]
You pick the code that goes here…
# …
# …
print my_list
Pick the code that results in the following output:
[‘apples’, ‘bananas’, ‘grapes’, ‘oranges’, ‘pineapples’]
______________________
my_list.sort()
my_list.reverse()
my_list.sort()
my_list.reverse()
my_list.remove(“grapes”)
B
Look at the following program:
my_list = [“bananas”, “oranges”, “grapes”, “pineapples”, “apples”]
You pick the code that goes here…
# …
# …
print my_list
Pick the code that results in the following output:
[‘pineapples’, ‘oranges’, ‘grapes’, ‘apples’]
______________________
my_list.remove(“bananas”)
my_list.sort()
my_list.remove(“bananas”)
my_list.reverse()
my_list.remove(“bananas”)
my_list.sort()
my_list.reverse()
my_list.remove(“bananas”)
D
