cs 171 final😔🤘🏽

What symbol is used to denote comments in a Python program?

#

Fill in the Blank with the best option item = 'car' price = 35000 print('The %s is ____' % (item, price))

%d

Fill in the Blank item = 'car' price = 35983.30 print('The %s is ____' % (item, price))

%f

Fill in the Blank item = 'car' price = 35000 print('The ___ is %d' % (item, price))

%s

def f(x, y): print( "f(%d, %d)" %(x, y) ) if y == 0: return x else : m = f(y, x % y) return m f(49, 104) Complete the output of the program to the console below. f( [A1], [A2] ) f( [A3], [A4]) f( [A5], [A6]) f( [A7], [A8]) f( [A9], [A10])

(49,104) (104,49) (49,6) (6,1) (1,0)

The output of the statement 'Eagles'.find('L') would be

-1

What Integer is represented by the binary Two's Complement value 1010 1010?

-86

What Integer is represented by the binary value 0000 0000?

0

def print_face(): print("Printing") print_face() print_face() How many function definitions of print_face are there?

1

What is the result of float(1.55)

1.55

What Binary represented by the integer value 154?

1001 1010

Given the following list: [ 43, 44, 91, 8, 59, 10, 64, 81, 94, 13, 3 ] How many list elements will be compared if the search key is 3 using linear search? Enter a number (e.g. 1)

11

What Two's Complement Binary representation of the integer -32?

1110 0000

How many times will the print statement execute? for i in range(6): for j in range(3, 5): print(""Hello!"")

12

What does the following code print? def pizza_maker(size, topping, *extra): print('%s inch pizza with %s' % (size, topping), end=' ') for other in extra: print(other, end=' ')pizza_maker('16', 'pepperoni', 'mushrooms')

16 inch pizza with pepperoni mushrooms

Given the following list: [ 4, 11, 17, 18, 25, 45, 63, 77, 89, 114 ] We are using binary search and our key is 17. What is the third value the key is compared against? Enter a number (e.g. 4)

17

Quick sort divides an array into how many sub lists?

2

The return value for 'ABACA'.find('A',1) will be?

2

What is the result of 9 // 4?

2

Given the following list: [ 2, 5, 7, 10, 12, 15, 20, 22, 25, 70 ] We are using binary search and our key is 19. What is the second value the key is compared against? Enter a number (e.g. 4)

22

Given the following list: [ 4, 11, 17, 18, 25, 45, 63, 77, 89, 114 ] How many list elements will be compared to find 17 using binart search? Enter a number (e.g. 1)

3

Given the following list: [ 9, 15, 17, 38, 40, 45, 62, 73, 86, 134 ] How many list elements will be compared if the search key is 17 using binary search? Enter a number (e.g. 1)

3

What do you expect as the output for the statement '%.2f' % 3.14159

3.14

How many times will the loop body of the following code execute? x = 3 while x <= 6 # Do something x = x + 1

4

What will be the output for '%d' % 5.9?

5

What is the value of result after the following code is executed? def f(n): if n == 4: return 1 else: return 3*n+f(n-1) result=f(7)

55

Given the following list: [ -1, 4, 630, 810, 9, 490, 30, -67, 1, 69, 602 ] How many list elements will be compared if the search key is 490 using linear search? Enter a number (e.g. 1)

6

What sequence is generated by range(6, 1, -2)?

6 4 2

Which symbol is used to assign a value to a variable?

=

What is the purpose of the following recursive function? def mystery(myList, start, stop, count): if start == stop: return count else:c = myList[start] % 2 if c == 0: count += 1 return mystery(myList, start + 1, stop, count) else: return mystery(myList, start + 1, stop, count)

Find the number of even values in a list

What is i = i + 1 equal to?

I += 1

A function's ability to add/multiply different types of objects is called

Polymorphism

To search for modules in directories other than the current directory, we modify the ________

Pythonpath environmental variable

What kind of error is caused when you violate the programming language's rules?

Syntax error

What is the purpose of the following recursive function? def mystery(a, b): if a > b: return 1 else : return a * mystery(a + 1, b)

To calculate the product of all numbers from a to b

All data stored in a computer's memory is in binary. T or F?

True

Which loop is preferred in a situation when the number of iterations is not computable before entering the loop?

While loop

Given the following list: [ 20, 3, 18, 15, 25, 7, 34, 11 ] Which of the following would accurately show the list after the third pass of the selection sort algorithm?

[3, 7, 11, 15, 25, 20, 34, 18]

Which special symbol is used to print a newline in a string?

\n

What variable name can be used to determine if a file is being run as a script or module?

_name_

Which of the following is a valid variable name?

_x_

Which of the following is a valid compound operator?

a += 1

What does the following code print? def modify(my_string): my_string += 'def'my_string = 'abc'modify(my_string)print(my_string)

abc

The current contents of my_file.txt are: abc What will my_file.txt look like after this code block is executed: f = open('myfile.txt', 'a') f.write('abc\n')

abc abc

Given my_str = 'philadelphia', what would my_str[::-2] return?

ahldlh

What is a sequence of instructions that solves a problem?

algorithms

name = 'abcd' print (name[1]); Output of above code is:

b

Data is stored in a computer's memory using what system?

binary

For a file object my_file opened in binary mode, my_file.read() returns a ____

bytes object

Base 10 representation of a number is known as what type of representation?

decimal representation

The help() function prints the __ for a function.

docstring

Python uses _____ typing

dynamic

When passing arguments containing spaces through command line, the user should _____.

enclose argument with quotes

A Programmer should write the entire program before testing whether the program works. T or F?

false

Python code can be loaded from other files using the #include command. T or F?

false

What is the value of result after the following code is run? a = True b = False c = False result = b and c and not c

false

What is the value of result after the following code is run? a = True b = False c = False result = c and a or not a

false

What is the value of result after the following code is run? a = True b = True c = True result = a and not b or not a

false

What data type does the / operator return?

float

What programming structure best solves the following problem? Apply a 10% discount to all the prices stored in a List

for loop

What programming structure best solves the following problem? Print all values in the range(0,21)

for loop

Match the following for loop with the while loop that produces the exact same output. for i in range(0, 6): print(i)

i = 0 while i <= 5: print(i) i += 1

In Python, strings are ___ objects

immutable

Which of the following commands would allow a script to use code from a file named example.py

import example

What is a loop that will always execute because the loop's expression is always True?

infinite loop

What data type is the variable a in the following statement a = 13

integer

What data type is the variable a in the following statement? a = 24

integer

What data type is the variable a in the statement a = int(input()) ?

integer

What is the program that executes code written in Python called?

interpreter

Which method can be used to return a new set with the shared elements between the two sets?

intersection()

Each time through a loop's statement is called a/an?

iteration

Which of the following is not found in the Math Module?

len

What data type is the variable a in the following statement a = [2, 12, 9]

list

What data type is the variable a in the following statement? a = [13, 6, 3]

list

What data type is the variable a in the following statement? a = [2, 0, 7]

list

Variables created inside of a function are ___ variables

local

What is a variable to count the number of iterations called?

loop variable

Given my_str = 'AAAAA', to obtain the value for my_str2 as 'BBBBB', what statement should be used?

my_str2 = my_str.replace('A','B')

What command can be used to make an identical copy my_str2 of an existing string my_str1?

my_str2 = my_str1[:]

What is num = num + num * 2 equal to?

num += num*2

What function converts a character to its numerical encoding?

ord

To handle issues with different path formats across different operating systems, this module should be used to generate paths: ______.path

os

What is it called when a program puts data somewhere, such as the screen or a file?

output

What version of Python is used in this class?

python 3

________ can be used when a programmer may want a program to stop executing if an unfinished function is called

raise NotImplementedError

Which function generates a sequence of numbers?

range ()

To generate every integer from 4 down to -3, which range function should be used? Sequence: 4 3 2 1 0 -1 -2 -3

range(4, -4, -1)

In an open statement, if only the first argument (path to file) is specified, Python opens the file in ______ mode

read

When using string-formatting syntax, each pair of braces {} is known as a ___

replacement field

Which of the below is most similar to Floating Point representation?

scientific notation

The process of searching for a name in the available namespaces is called _________

scope resolution

What is an example of an output device?

screen

String, list, and tuple are ______ type of data

sequence

Which of the following is not a property associated with variables in Python?

status

What data type is the variable a in the following statement? a = '10'

string

What type of value is returned by the input command?

string

What is text enclosed in quotes known as?

string literal

What kind of error is caused when you violate the programming language's rules?

syntax error

To access command-line arguments passed to your script, which module should you use?

sys.argv

Given my_str = 'Carson Wentz', evaluate the expression: my_str is 'Carson Wentz' T or F?

true

Incremental programming may help reduce the number of errors in a program.

true

What is the value of result after the following code is run? a = False b = False c = True result = not b or not a and b

true

What is the value of result after the following code is run? a = True b = True c = False result = not c or a or c

true

The final number of As, Bs, Cs, Ds, and Fs in the class can best be represented using

tuple

What error will be raised by the following code? q = ['10', '20', '30', 'Yellow'] for e in q : print(e) print(float(e) * 10)

value error: invalid literal

To go through the files and subdirectories within a specific directory, which method from the os module is useful?

walk ()

Which loop should be used when iterating until the values of a and b are not equal.

while loop

The split() string method uses __ as the default separator.

whitespaces

What string slicing operation can be used to get every third character of a string x?

x[::3]