1) How many times will the following loop run?
i = 0
while i < 10 :
print(i)
i = i + 1
A) 10
2) How many times does the code snippet given below display “Loop Execution”?
i = 1
while i != 10 :
print(“Loop Execution”)
i = i + 1
A) 9 times
3) What is the output of the following code snippet?
i = 1
while i < 10 :
print(i, end = ” “)
i = i + 2
if i == 5 :
i = 9
A) 1 3 9
4) What is the output of the code fragment given below?
i = 0
j = 0
while i < 125 :
i = i + 2
j = j + 1
print(j)
A) 63
5) What is the output of the following loop?
s = 1
n = 1
while s < 10 * n :
s = s + n
n = n + 1
print(s)
A) 211
6) What will be the result of running the following code fragment?
year = 0
rate = 5
principal = 10000
interest = 0
while year < 10 :
interest = (principal * year * rate) / 100
print(“Interest “, interest)
A) The code fragment will continue to display the calculated interest forever because the loop will never end.
7) Which of the following code snippets displays the output exactly 10 times?
A) i = 0
while i < 10 :
print(“This is example 2.”)
i = i + 1
8) What is the output of the following code snippet?
i = 1
while i != 9 :
print(i , end = ” “)
i = i + 1
if i == 9 :
print(“End”)
A) 1 2 3 4 5 6 7 8 End
9) How many times is the text “Let’s have fun with Python.” printed when this code snippet is run?
i = 0
while i <= 10 :
print(“Let’s have fun with Python.”)
i = i + 1
if i % 2 == 0 :
i = 10
A) 3
10) Select the statement that correctly completes the loop in this code snippet.
years = 20
rate = 0.05
balance = 10000
while years > 0 :
# Place code here
interest = balance * rate / 100
balance = balance + interest
A) years = years – 1
11) Is the following code snippet legal?
b = False
while b != b :
print(“Do you think in Python?”)
A) Yes, it is legal but does not print anything.
12) What is the output of the following code snippet?
i = 1
while i < 20 :
print(i , ” “)
i = i + 2
if i == 15 :
i = 19
A) 1 3 5 7 9 11 13 19
13) What are the values of i and j after the following code snippet is run?
i = 10
j = 20
count = 0
while count < 5 :
i = i + i
i = i + 1
j = j – 1
j = j – j
count = count + 1
print(“i = “, i , “, j = “, j)
A) i = 351, j = 0
14) How many times does the following code fragment display “Hi”?
i = 10
while i >= 0 :
print(“Hi”)
i = i – 1
A) 11 times
15) What is the output of the code snippet given below?
n = 0
while n * n < 100 :
print(n * n, end = ” “)
n = n + 1
A) 0 1 4 9 16 25 36 49 64 81
16) What is the output of the code snippet given below?
s = “abcde”
length = len(s)
i = 1
while i < length :
print(s[i])
i = i + 1
A) bcde
17) What is the output of the code snippet given below?
s = “abcde”
i = 1
while i < 5 :
if i > 1 :
print(s[i])
A) No output (infinite loop)
18) What is the output of the code snippet given below?
s = “12345”
i = 0
while i < 5 :
print(s[i])
i = i + 1
A) 12345
19) What is the output of the code snippet given below?
s = “12345”
i = 1
while i < 5 :
if i > 1 :
print(s[i])
A) No output (infinite loop)
20) How many times does the code snippet below display “Hello”?
i = 0
while i != 15 :
print(“Hello”)
i = i + 1
A) 15 times
21) How many times does the following loop run?
i = 0
j = 1
while j >= 1 :
print(i , “;” , j)
i = i + 1
if i % 3 == 0 :
j = j – 1
A) 3 times
22) What is the output of the following code snippet?
i = 1
while i <= 10 :
print(“Inside the while loop”)
i = i + 10
A) “Inside the while loop” will be displayed only once.
23) How many copies of the letter A are printed by the following loop?
i = 0
while i < 5 :
print(“A”)
i = i + 1
A) 5
24) How many copies of the letter B are printed by the following loop?
i = 0
while i == 5 :
print(“B”)
i = i + 1
A) 0
25) How many copies of the letter C are printed by the following loop?
i = 0
while i < 5 :
print(“C”)
i = i – 1
A) Infinity
26) What is the value of i at the end of the following code segment?
i = 1
while i < 32 :
i = i * 2
A) 32
27) The following while loop should continue to run as long as the user does not enter a negative number. What condition should be used to achieve this behavior?
x = int(input(“Enter an integer: “))
while ____________ :
x = int(input(“Enter an integer: “))
A) x >= 0
28) What term is used to describe a loop where the number of times that the loop will execute is known before the body of the loop executes for the first time?
A) Definite
29) Which of the following changes will make the following code snippet display Let us learn Python exactly 10 times?
i = 0
while i <= 10 :
print(“Let us learn Python”)
i = i + 1
A) Replace i = 0 with i = 1
30) Which statement corrects the off-by-one error in the following code:
# This code prints the first 10 numbers starting with zero
i = 0
while i <= 10 :
print(i)
i = i + 1
A) Replace while i <= 10 with while i < 10
31) What is the output of the following code fragment?
i = 1
sum = 0
while i <= 15 :
sum = sum + i
i = i + 1
print(“The value of sum is”, sum)
A) The value of sum is 120
32) What are the values of i and j after the following code fragment runs?
i = 60
j = 50
count = 0
while count < 5 :
i = i + i
i = i + 1
j = j – 1
j = j – j
count = count + 1
print(“i =”, i, “, j =”, j)
A) i = 1951, j = 0
33) Which type of error could be reported by Python when the program contains an “off-by-one” error?
A) Run-time error
34) What is the output of the code snippet given below?
i = 0
while i != 11 :
print(i, end=” “)
i = i + 3
A) 0 3 6 9 12 … (infinite loop)
35) What is the output of the following code fragment?
i = 1
sum = 0
while i <= 11 :
sum = sum + i
i = i + 1
print(“The value of sum is”, sum)
A) The value of sum is 66
36) What is the last line of output produced by the code snippet below?
i = 0
total = 0
while total < 0 :
i = i + 1
total = total – i
print(i, total)
A) No output
37) How many times does the following loop run?
i = 0
j = 1
while j >= 1 :
print(“” , i , “;” , j)
i = j + 1
if i % 2 == 0 :
j = j – 1
A) 1 time
38) What is the output of the code snippet given below?
s = “abcde”
j = len(s) – 1
while j >= 0 :
print(s[j])
j = j – 1
A) edcba
39) What is the output of the code snippet given below?
i = 0
while i != 11 :
print(” “, i)
i = i + 2
A) 0 2 4 6 8 … (infinite loop)
40) What will be the output of the following code snippet?
token = False
while token :
print(“Hello”)
A) No output after successful compilation.
41) What is the output of the code snippet given below?
i = 0
while i != 9 :
print(i, end = ” “)
i = i + 2
A) 0 2 4 6 8 10 12 14 … (infinite loop)
42) What is the output of the code fragment given below?
i = 0
j = 0
while i < 27 :
i = i + 2
j = j + 1
print(“j =”, j)
A) j = 14
43) The code snippet below is supposed to check whether an integer greater than 1 is a prime number. What will be the result of executing it?
j = 2
result = 0
number = int(input(“Please enter an integer (2 or greater):”))
while j < number :
if number % j == 0 :
result = 1
j = j + 1
if result == 1 :
print(“Number:”, number, “is Not Prime.”)
else :
print(“Number:”, number, “is Prime.”)
A) The code snippet displays the desired result.
44) What is the output of the following code snippet?
a = 2
n = 16
r = 1
b = a
i = n
while i > 0 :
if i % 2 == 0 : # n is even
b = b * b
i = i / 2
else :
r = r * b
i = i – 1
print(“r =”, r)
A) r = 65536
45) What are the final values of the variables i, j, and n at the end of this loop?
i = 0
j = 12
n = 0
while i != j :
i = i + 2
j = j – 2
n = n + 1
A) 6 6 3
46) When hand-tracing the loop in the code snippet below, which variables are important to evaluate?
i = 10
j = 5
k = -10
sum = 0
while i > 0 :
sum = sum + i + j
i = i – 1
print(“Iteration: “, i)
A) The variables i and sum
47) When hand tracing, drawing a line through the value stored in a variable means that
A) The value stored there has changed to something new
48) When hand-tracing a portion of code, which statement about Boolean conditions is true?
A) They are crucial to evaluate since they determine if-statement conditions and looping.
49) What is the output of this code snippet?
s = 1
n = 1
while s < 3 * n :
s = s + n
print(s , end = ” “)
n = n + 1
A) 2 4 7 11 16 22
50) What are the values of i and j after the following code snippet executes?
i = 20
j = 70
count = 0
while count < 5 :
i = i + i
i = i + 1
j = j – 1
j = j – j
count = count + 1
print(i)
print(j)
A) i = 671, j = 0
51) The process of hand-tracing code is valuable because
A) It gives valuable insight that you do not get by running the code.
52) What is the output of the code snippet given below?
s = “aeiou”
i = 0
while i < 5 :
print(s[i], s[i + 1], end = ” “)
i = i + 1
if i >= 3 :
i = 5
A) a e e i i o
53) What is the sentinel value in the following code segment?
value = 15
x = int(input(“Enter an integer: “))
while x != 0 :
value = value * 2
print(value + 3)
x = int(input(“Enter an integer: “))
A) 0
54) Of the following options, what should the user enter to cause the following while loop to terminate?
done = False
while not done :
x = float(input(“Enter a number: “))
if x > 5.0 :
print(x)
elif x > 0.0 :
done = False
elif x < -5.0 :
print(-x)
else :
done = True
A) -2.5
55) Which of the following statements is correct about a sentinel?
A) A sentinel is a value that indicates the end of an input sequence.
56) What will be the output of the following code snippet?
token1 = True
while token1 :
for i in range(0,10) :
print(“Hello”)
token1 = False
A) Hello will be displayed 10 times.
57) Insert a statement that will correctly terminate this loop when the end of input is reached.
done = False
while done != True :
x = input(“Enter a value”)
if x == “Q” :
_________________
A) done = True
58) Which of the following loops executes exactly 10 times?
A) for i in range(1, 11) :
i = 1
59) When will the loop in the following code snippet stop?
sum = 0
count = 1
str = input(“Enter values, Q to quit: “)
while count < 100 and str != “Q” :
value = float(str)
sum = sum + value
count = count + 1
str = input(“Enter values, Q to quit: “)
I. When the user enters an integerII. When the user enters the character QIII. After the user enters 100 numbers
A) II or III
60) The value that denotes the end of an input sequence is known as a:
A) Sentinel value
61) Which of the following command lines starts the python program sum.py so that it will read its input from values.txt instead of the keyboard?
A) python sum.py < values.txt
62) What happens when the following loop is executed?
val1 = True
val2 = False
while val1 :
if val1 :
print(“Hello”)
val1 = val2
A) “Hello” will be displayed only once.
63) Which statement is correct about the execution of the loop in the following code fragment?
num = int(input(“Please enter a number (0 when done): “))
incr = 0
while num != 0 :
incr = incr + 1
num = int(input(“Please enter a number (0 when done): “))
print(incr)
A) The program prints the count of inputs not equal to zero.
64) What is the sentinel value in the following code snippet?
age = 0
sumOfAges = 0
stop = 1
age = int(input(“Enter an age (-1 to stop):”))
while age != -1 :
sumOfAges = sumOfAges + age
age = input(“Enter an age (-1 to stop):”)
print(“Sum of ages “, sumOfAges)
A) -1
65) What will be the final output of the following code snippet when a user enters input values in the order 10, 20, 30, 40, 50, and -1?
sum = 0
count = 0
salary = 0
average = 0
while salary != -1 :
salary = float(input(“Enter salaries (-1 to stop): “))
if salary != -1 :
sum = sum + salary
count = count + 1
if count > 0 :
average = sum / count
print(“The average salary: “, average)
else :
print(“No data!”)
A) The average salary: 30.0
66) Storyboards are a helpful part of the design process because the storyboard develops
A) The information needed to solve the problem, and how to present that information
67) When designing storyboards, it is a good idea to use different colors to
A) Make it easy to distinguish between user input and program output.
68) Suppose you must design a program to calculate the roll-out (number of inches traveled in one revolution of the pedals of a bicycle based on its gear combinations). The user must provide the gear sizes, which must be converted into roll-out for all different gear combinations. How can the flow of user interaction for this problem be designed?
A) A storyboard can be used.
69) Which statement about storyboards is true?
A) A storyboard can help prevent potential user confusion early in the design process.
70) What will be printed by the statements below?
a = 10
while a > 5 :
print(a , end = ” “)
a = a – 2
A) 10 8 6
71) What will be printed by the statements below?
val = 1
sum = 0
while val < 5 :
sum = sum + val
val = val + 1
print(sum)
A) 10
72) What will be printed by the statements below?
val = 1
sum = 0
while val < 5 :
sum = 0
sum = sum + val
val = val + 1
print(sum)
A) 4
73) What will be printed by the statements below?
for ctr in range(0, 10) :
print(ctr, end = ” “)
A) 0 1 2 3 4 5 6 7 8 9
74) What will be printed by the statements below?
for ctr in range(10, 5, -1) :
print(ctr, end = ” “)
A) 10 9 8 7 6
75) Which of the following loops will print the odd numbers between 0 and 20?
A) num = 1
while num < 20 :
print(num, ” “)
num = num + 2
76) Which of the following loops will print the odd numbers between 0 and 20?
A) num = 1
while num < 11 :
value = num * 2 – 1
print(value, ” “)
num = num + 1
77) Which of the following conditions can be added to the code below so it will loop until the value of sum is greater than 100?
sum = input(“enter an integer”)
while # Put condition here :
sum = sum + input(“Enter an integer”)
A) sum <= 100
78) What does the following code compute?
sum = 0
count = 0
value = input(“enter an integer”)
while value > 0 :
sum = sum + value
count = count + 1
value = input(“enter next integer”)
result = sum * 1.0 / count
print(result)
A) The average of all the positive integers in the input
79) What is the output of the code below?
for val in range(0, 4) :
print(“+”, end = “”)
for num in range(0, val) :
print(“0”, end = “”)
A) ++0+00+000
80) What is the output of the code below?
num = 1
for val in range(0, 4) :
sum = val
for x in range(0, val, num) :
sum = sum + x
print(sum , end = ” “)
A) 0 1 3 6
81) How many times does the following loop execute?
i = 0
found = False
while i < 100 and found != True :
i = i + 1
print(i, end = ” “)
j = i * i
if i * i * i % j == j :
found = True
A) 100 times
82) The following program is supposed to sum all of the numbers entered by the user. What line of code must be inserted in the blank so that the program will achieve this goal?
total = 0.0
inputStr = input(“Enter a value: “)
while inputStr != “” :
value = float(inputStr)
____________________
inputStr = input(“Enter a value: “)
A) total = total + value
83) The following program is supposed to count how many even numbers are entered by the user. What line of code must be inserted in the blank so that the program will achieve this goal?
evens = 0
inputStr = input(“Enter a value: “)
____________________
value = int(inputStr)
if value % 2 == 0:
evens = evens + 1
inputStr = input(“Enter a value: “)
A) while inputStr != “” :
84) The following program is supposed to continue reading values from the user until a value between 25 and 75 is entered. What line of code must be inserted in the blank so that the program will achieve this goal?
value = int(input(“Enter a value: “))
____________________
value = int(input(“Enter a value: “))
A) while value < 25 or value > 75 :
85) The following program is supposed to print a message any time the user enters two consecutive values that are the same. What line of code must be inserted in the blank so that the program will achieve this goal?
value = int(input(“Enter a value: “)
inputStr = input(“Enter a value: “)
while inputStr != “” :
previous = value
value = int(inputStr)
____________________
print(“Found consecutive values that are the same”)
inputStr = input(“Enter a value: “)
A) if previous == value :
86) How many times does the while loop execute?
s = “abcdEfghI”
found = False
count = 0
while found == False :
if s[count].isupper() :
print(letter)
found = True
count = count + 1
A) 5 times
87) Consider the following code snippet. What should be placed in the blank to cause a message to be displayed when the user enters the same letter twice in a row?
letter = input(“Enter the next letter in the alphabet: “)
while letter != “”:
previous = letter
letter = input(“Enter the next letter”)
if ________________________ :
print(“Duplicate input”)
A) letter == previous
88) What is the output of this code snippet if the user enters the numbers 1 2 3 4 -1?
total = 0
validNumber = True
while validNumber :
value = int(input(“Please enter a positive value < 100: “))
if value > 0 and value < 100 :
total = total + value
else :
validNumber = False
print(total)
A) 10
89) What will be printed by the statements below?
a = 10
while a > 5 :
a = a – 2
print(a , end = ” “)
A) 8 6 4
90) What is printed by the following code segment?
position = 0
str = input(“Enter a string: “)
while position < len(str) and str[position] != ‘e’ :
position = position + 1
print(position)
A) The position of the first ‘e’ in the string or the length of the string if there is no ‘e’
91) Which code snippet produces the sum of the first n positive even numbers? Note that 0 is neither positive nor negative.
A) sum = 0
for i in range(1, n + 1) :
sum = sum + i * 2
92) What is the output of this loop?
i = 0
found = False
while i < 20 and found != True :
sum = i * 2 + i * 3
print(sum, end=” “)
if sum > 50 :
found = True
i = i + 1
A) 0 5 10 15 20 25 30 35 40 45 50 55
93) Which of the following for loops will run the loop body 5 times?
A) for i in range(0, 5) :
94) Which of the following for loops will run the loop body 5 times?
A) for i in range(5, 0, -1) :
95) What is the value of j at the end of the following code segment?
j = 0
for i in range(0, 4) :
j = j + i
A) 6
96) What is the value of j at the end of the following code segment?
j = 0
for i in range(1, 10) :
if j < 10 :
j = j + i
A) 10
97) Consider the following for loop:
for i in range(0, 10) :
print(i)
Which of the following while loops will generate the same output?
A) i = 0
while i < 10 :
print(i)
i = i + 1
98) Consider the following while loop:
j = 10
while j >= 5 :
print(“X”)
j = j – 1
Which of the following for loops will generate the same output?
A) for j in range(10, -1, -2) :
print(“X”)
99) What is the output of this loop?
counter = 1
for i in range(1, 100) :
counter = counter + 1
print(counter)
A) 100
100) What does the following code snippet print?
fruitName = “banana”
for letter in fruitName :
print(letter, end = ” “)
A) b a n a n a
101) What is the output of the following code snippet?
for i in range(4) :
for j in range(3) :
print(“*”, end=””)
print()
A) Prints 4 rows of 3 asterisks each
102) How many times does the loop execute in the following code fragment?
for i in range(0, 50, 4) :
print(i)
A) 13
103) How many times does the following code snippet display “Loop Execution”?
for i in range(0, 10) :
print(“Loop Execution”)
The code snippet does not run because of a compile error.
A) Ten times.
104) Which of the following is considered an equivalent while loop for this for loop?
s = 0
for i in range(1, 10) :
s = s + i
A) s = 0
i = 1
while i < 10 :
s = s + i
i = i + 1
105) Which statement about this code snippet is accurate?
years = 50
balance = 10000
targetBalance = 20000
rate = 3
for i in range(1 , years + 1) :
if balance >= targetBalance :
i = years + 1
else :
interest = balance * rate / 100
balance = balance + interest
A) The loop will run 50 times.
106) What values does counter variable i assume when this loop executes?
for i in range(20, 2, -6) :
print(i, end = “, “)
A) 20, 14, 8
107) What is the output of the following code snippet?
f1 = 0
f2 = 1
print(f1, ” “)
print(f2, ” “)
for i in range(1, 11) :
fRes = f1 + f2
print(fRes, end = ” “)
f1 = f2
f2 = fRes
print()
A) 0 1 1 2 3 5 8 13 21 34 55 89
108) How many iterations does the following loop carry out?
for i in range (-10, 11, 2) :
A) 11 times
109) How many times does the following loop execute?
for d in range(1, 10) :
d = d / 3
print(d , ” “)
A) 9
110) Consider the following code segment:
s = “Hello World!”
__________
print(ch)
What should be placed in the blank so that the letters of s are printed out with one letter appearing on each line?
A) for ch in s :
111) Which of the following for loops is illegal?
A) for i in range( , ) :
112) When does the execution switch from the inner to the outer loop?
j = 1
for i in range(0, 10) :
while(j < 5) :
print(“Hello”)
if j == 2 :
j = 6
j = j + 1
print(“switch from inner to outer”, i, ” “, j)
A) When the value of j becomes 6
113) A loop inside another loop is called:
A) A nested loop
114) What is the first and last value of i to be displayed by the following code snippet?
n = 20
for i in range(0, n) :
for j in range(0, i) :
print(i)
A) 1 and 19
115) How many times will the output line be printed in the following code snippet?
for num2 in range(1, 4) :
for num1 in range(0, 3) :
print(num2, ” “, num1)
A) 6 times
116) What is the last output line of the code snippet given below?
for i in range(3) :
for j in range(5) :
if i % 2 == j % 2 :
print(“*”, end=””)
else :
print(” “, end=””)
print()
A) * * *
117) What is the last output line of the code snippet given below?
i = 0
j = 0
while i < 10 :
num = 1
j = i
while j > 1 :
print(j, end = ” “)
num = num * 2
j = j – 1
print(“***”)
i = i + 1
A) 9 8 7 6 5 4 3 2 ***
118) Which for loop prints data across each row in the following code snippet?
for i in range(1, 4) :
for j in range(1, 4) :
print(“X”, end=””)
print(“”)
A) The inner for loop
119) What will be the output of the following code snippet?
for i in range(0,7) :
for j in range(7, i, -1) :
print(“*”, end=””)
print(“”)
A) A right triangle with seven rows and seven columns of asterisks. The number of columns decrements by one on completion of one iteration of the inner loop.
120) In the following code snippet, how many times will “Hello” be printed?
for i in range(0, 10) :
for j in range(1, 5) :
print(“Hello”)
A) 40
121) Which of the following code segments is an example of a nested loop?
A) while i < 0 :
while x == 10 :
122) Consider the following code segment:
for i in range(4) :
____________________
print(“*”, end=””)
print()
It is supposed to generate the following output:
***
***
***
***
Which line of code should be placed in the blank to achieve this goal?
A) for j in range(3) :
123) How many copies of the letter A will the following code segment display?
for i in range(100) :
for j in range(5) :
print(“A”)
A) 500
Question 124
1 / 1 pts
What does the following code snippet display?
for n in range(1, 11) :
for x in range(1, 11) :
print(n*x, end = ” “)
print()
Nothing because it has compilation error.
It displays a multiplication table for numbers 1-11 times 1-11
It displays a table of all numbers squared from 1-10
It displays a multiplication table for numbers 1-10 times 1-10
Question 125
1 / 1 pts
What type of chart shows the distribution of data across a fixed number of categories?
A Plot
A Grade Chart
A Height Chart
A Histogram
Question 126
1 / 1 pts
Which print statement displays the value of s without starting a new line?
print(end=”s”)
print(s)
print(“s”)
print(s, end=””)
Question 127
1 / 1 pts
What is the output of this code snippet?
str = “ABCabc”
i = 0
while i < len(str) :
ch = str[i]
if ch.islower() :
print(i , ” “)
else :
i = i + 1
0 1 2
3 4 5
3
3 3 3 3 3 … (infinite loop)
Question 128
1 / 1 pts
Consider the following code segment. It is supposed to count the number of digits (0 – 9) in a string, text.
count = 0
for char in text :
____________________
count = count + 1
What line of code should be placed in the blank to achieve this goal?
if char >= “0” and char <= “9” :
if text[count] >= “0” and text[count] <= “9” :
if text[char] >= “0” and text[char] <= “9” :
if text >= “0” and char <= “9” :
Question 129
1 / 1 pts
Is the code snippet written below legal?
s = “1234”
for i in range (0, 4) :
print(s[i], s[i + 1])
No; for i = 0, s[i] will result in an string index out of range error
Yes.
No; there should not be a colon at the end of line 2.
No; for i = 3, s[i + 1] will result in an string index out of range error.
Question 130
1 / 1 pts
Consider the following code segment:
found = False
position = 0
text = “Hello World!”
while not found and position < len(text) :
if text[position] == “o” :
found = True
else :
position = position + 1
What is the value of position at the end of this code segment?
5
4
7
8
Question 131
1 / 1 pts
Consider the following code segment. It is designed to identify the first location within a string, text where two adjacent characters are the same.
i = 1
found = False
while not found and i < len(text) :
____________________ :
found = True
else :
i = i + 1
What line of code should be placed in the blank to achieve this goal?
if text[i] == text[0] :
if text[i] == text[i + 1] :
if text[i] == text[i – 1] :
if text[i] == text[i] :
Question 132
1 / 1 pts
What will be the range of the random numbers generated by the following code snippet?
from random import randint
randomNum = randint(1,50)
Between 1 and 49
Between 1 and 50
Between 0 and 49
Between 0 and 50
Question 133
1 / 1 pts
Which of the following is the correct code snippet for throwing a pair of dice to get a sum of the numbers on two dice between 2 and 12 with the same probability as when throwing actual dice?
randint(2, 12)
randint(1, 6)
randint(1, 12) – 2
randint(1, 6) + randint(1, 6)
Question 134
1 / 1 pts
Suppose that a program asks a user to enter multiple integers, either positive or negative, to do some calculation. The data entry will stop when the user enters a certain value to indicate the end of the data. What value should the code use as the sentinel?
An alphabetic character
-1
999
0
Question 135
1 / 1 pts
Which of the following activities can be simulated using a computer?I. Waiting time in a line at a restaurantII. Tossing a coinIII. Shuffling cards for a card game
I and II only
I only
II only
I, II, and III
Question 136
1 / 1 pts
What range of numbers are generated by the random() function?
greater than or equal to zero and less than one
greater than zero and less than or equal to one
greater than zero and less than one
greater than or equal to zero and less than or equal to one
Question 137
1 / 1 pts
Assume the following variable has been declared and given a value as shown:
from random import randint
number = randint(0, 27) * 2 + 3
What are the smallest and largest values that may be assigned to number?
3, 55
3, 57
0, 26
0, 27
Question 138
1 / 1 pts
Which line of code will generate a random integer from 1 up to and including 10, and store it in x? Assume that the randint function has been imported from the random module.
x = randint(0, 10)
x = randint(1, 11)
x = randint(0, 11)
x = randint(1, 10)
Question 139
1 / 1 pts
Which line of code will generate a random floating-point number between 0 and 6, and store it in x? Assume that the random function has been imported from the random module.
x = random(6)
x = random()
x = random() * 6
x = random(0, 6)
Question 140
1 / 1 pts
What does the following code do?
from random import randint
sum = 0
COUNT = 1000
for i in range(1,COUNT + 1) :
sum = sum + randint(0, 100)
print(sum / COUNT)
It performs a Monte Carlo fluid dynamics simulation.
It calculates the average of 1000 random numbers between 1 and 101.
It calculates the average of 1000 random numbers between 0 and 100.
It simulates the outcome of throwing a coin.
Question 141
1 / 1 pts
Which of the following statements correctly prints the result of simulating the toss of a pair of coins to get 0 (heads) or 1 (tails) for each coin?
print(randint(0, 2), randint(0, 2))
print(randint(1, 1))
print(randint(0, 1))
print(randint(0, 1), randint(0, 1))
Question 142
1 / 1 pts
Which of the following code snippets will generate a random number between 0 and 79?
val = int(random() * 80)
val = int(random() * 80 – 1)
val = int(random() % 79)
val = int(random() % 80)
Question 143
1 / 1 pts
Which of the following expressions will generate a random integer in the range -20 to 20, inclusive, where each value has an equal chance of being generated?
randint (-20, 20)
randint (-20) + 40
randint(20) – 41
randint(41) – 20
Question 144
1 / 1 pts
Assume the following variable has been declared and given a value as shown:
from random import random
number = random() * 2 + 3
What are the smallest and largest values that may be assigned to number?
0.0, 3.0 (including 3.0)
-3.0, 3.0 (including 3.0)
0.0, 6.0 (excluding 6.0)
3.0, 5.0 (excluding 5.0)
Question 145
1 / 1 pts
Using computer algorithms to manipulate digital images is known as:
Data compression
Digital photography
Image processing
Computer vision
Question 146
1 / 1 pts
A digital image is a collection of __________ arranged in a grid of rows and columns.
canvases
elementary elements
dots
pixels
Question 147
1 / 1 pts
In an RGB color model, what color is represented by 255, 255, 255?
black
yellow
white
green
Question 148
1 / 1 pts
What RGB values represent green?
0, 255, 0
0, 0, 255
128, 128, 128
255, 0, 0
Question 149
1 / 1 pts
Which statement loads an image from a file and stores it in a variable? Assume that the ezgraphics module has already been imported using the statement:
from ezgraphics import GraphicsImage, GraphicsWindow
Image(“mountain.gif”)
image = (“mountain.gif”)
image = GraphicsImage(“mountain.gif”)
graphicsImage = Load(“mountain.gif”)
Question 150
1 / 1 pts
What programming language structure is used iterate over all of the individual pixels in an image?
A nested if statement
A for loop (not nested)
A nested for loop
A while loop (not nested)
Question 151
1 / 1 pts
Which of the following image processing operations changes the grid structure of the image without modifying the pixel values?
Darkening an image
Converting an image to grayscale
Replacing an image with its negative
Rotating an image
Question 152
1 / 1 pts
Which of the following is not a benefit of solving a simpler problem first?
Solving the simpler problem first will motivate you to solve the harder problem.
It can be difficult to figure out how to get started when solving a large task.
Usually, you learn something useful from solving the simpler task.
When the simpler problem is solved first it reduces the amount of time the computer needs to compute the answer for the larger problem.