CMPS-152 TEST 2

Which input value causes "Goodbye" to be output next? x = int(input()) while x >= 0: # Do something x = int(input()) print('Goodbye') Answer:

-1

How many times does the while loop execute for the given input values of -1 4 0 9? user_num = 3 while user_num > 0: # Do something user_num = int(input()) Answer:

1

What is the ending value of x? x = 0 i = 5 while (i > 1){ x = x + i i = i - 1 } Answer:

14

What is x's final value? x = 10 y = 20 if y <= 2 * x: x = x + 5 else: x = x * 2 Answer:

15

How many times does the following loop iterate? i = 5 while (i < 8){ print(i) i = i + 1 } Answer:

3

How many times will the body of the loop execute? my_list = [6, 2, 8, -1, 12, 15, -7] x = Get first my_list value While x is not negative: put "Positive number!" to output x = Get next my_list value Put "Done" to output Answer:

3

What is the ending value of count? my_list = [3, -4, 0, -1, 2, 1, 8] n = 0 count = 0 While n < length of my_list: If my_list[n] > 0 count = count + 1 n = n + 1 Answer:

4

What is the final value of x? x <- 3 y <- 1 if (x <= 3*y){ x = x + 1 } else { x = 0 } Answer:

4

How many times does the following loop iterate? i = 5 while i < 10: print(i) i = i + 1 Answer:

5

How many times will the body of the loop be executed? number = 70 guess = 55 while number != guess: if number > guess: guess = guess + 10 else: guess = guess - 1 print('The number is:', guess) Answer:

7

What is the ending value of z? z = 0 a = 5 while (a > 0){ a = a - 1 if (a == 2){ next } z = z + a } Answer:

8

What is the ending value of z? z = 0 a = 5 while a > 0: a = a - 1 if a == 2: continue z = z + a Answer:

8

What is the ending value of x? x = 0 i = 1 while i <= 6: x += i i += 2 Answer:

9

What sequence is generated by range(1, 10, 3)? Select one: a. 1 4 7 b. 1 3 6 9 c. 1 4 7 10 d. 1 11 21

a. 1 4 7

What is the output? num = 10 while (num <= 15){ cat(num, ' ') if (num == 12){ break } num = num + 1 } Select one: a. 10 11 12 b. 10 11 c. 10 11 12 13 14 15 d. 10

a. 10 11 12

What values for x cause Branch 1 to execute? If x > 100 : Branch 1 Else If x > 200: Branch 2 a. 101 or larger b. 100 to 200 c. 100 or larger d. 101 to 200

a. 101 or larger

What is the value of x after the following code is executed? x <- 17 if (x * 2 <= 12) { x = 0 } else { x = x + 2 } x = x + 1 Select one: a. 20 b. 0 c. 1 d. 19

a. 20

How many times will the print statement execute? for i in range(1, 3): for j in range(8, 12, 2): print('{:d}. {:d}'.format(i, j)) Select one: a. 4 b. 9 c. 6 d. 36

a. 4

What is the output? names = list("Gerry","Preet","Jimin","Susan") index = 1 while (index < length(names)){ if (names[index]=="Susan"){ break } else { index = index + 1 } } show(index) Select one: a. 4 b. 3 c. Done d. 5

a. 4

Fill in the blank so that the loop displays all odd numbers from 1 to 100. i = 1 while i <= 100: print(i) i = _____ Select one: a. i + 2 b. 1 c. i + 1 d. 2

a. i + 2

Which expression replaces ZZZ to make the loop ask for names until 'quit' is entered? name = readline("What is your name ('quit' to exit?)") while (name != 'quit'){ cat('Hello, ', ZZZ) name = readline("What is your name ('quit' to exit?)") } a. name != 'quit' b. name is not 'quit' c. 'quit' is False d. name == 'quit'

a. name != 'quit'

In the following code, the variable val is the function call's _____. def print_square_area(size): area = size * size print("A square of size {} has area {}".format(size, area)) val = float(input('Enter size of square: ')) print_square_area(val) Select one: a. value b. parameter c. property d. argument

a. value

Given year is positive, which expressions for XXX, YYY, and ZZZ will output the correct range? Choices are in the form XXX / YYY / ZZZ. If XXX: Output "1-100" Else If YYY: Output "101-200" Else If ZZZ: Output "201-300" Else: Output "Other" a. year < 101 / year < 201 / year < 301 b. year > 0 / year > 99 / year > 199 c. year < 100 / year < 200 / year < 300 d. year > 0 / year > 100 / year > 200

a. year < 101 / year < 201 / year < 301

What is the output? for (i in 0:10){ if (i == 6){ next } else { cat(i,' ') } } Select one: a. 0 1 2 3 4 5 7 8 9 b. 0 1 2 3 4 5 7 8 9 10 c. 0 1 2 3 4 5 d. 0 1 2 3 4 5 6

b. 0 1 2 3 4 5 7 8 9 10

What is the output? for i in range(11): if i == 6: continue else: print(i, end=' ') Select one: a. 0 1 2 3 4 5 6 b. 0 1 2 3 4 5 7 8 9 10 c. 0 1 2 3 4 5 d. 0 1 2 3 4 5 7 8 9

b. 0 1 2 3 4 5 7 8 9 10

What is the value of x after the following code is executed? x = 17 if x * 2 <= 34: x = 0 else: x = x + 1 x = x + 1 Select one: a. 35 b. 1 c. 19 d. 18

b. 1

What is the value of test_val after the following code is executed? a = 12 test_val = 6 if a * 2 == test_val: a = a + 7 else: test_val = 2 * a test_val = a + 1 Select one: a. 24 b. 13 c. 7 d. 25

b. 13

How many times does the following loop iterate? i <- 0 while (i <=40){ print(i) i = i + 2 } Select one: a. 20 b. 21 c. 0 d. 41

b. 21

Which input for variable c causes "Done" to be output next? c = 'y' while c == 'y': # Do something print('Enter y to continue, n to quit: ', end=' ') c = input() print('Done'); Select one: a. 'n' only b. Any value other than 'y' c. 'y' only d. No such value (infinite loop)

b. Any value other than 'y'

What is the output? names = ['Bob', 'Jill', 'Xu'] ages = [24, 18, 33] for index in [2, 0, 1]: print(names[index] + ":" + str(ages[index])) Select one: a. Xu, Bob, Jill:33, 24, 18 b. Xu:33Bob:24Jill:18 c. Bob:24Jill:18Xu:33 d. Xu:24Bob:18Jill:33

b. Xu:33Bob:24Jill:18

Which correctly calls the add() function? def add(a, b, c): print(a + b + c) Select one: a. add(2 4 6) b. add(2, 4, 6) c. add(2 + 4 + 6) d. add(2; 4; 6)

b. add(2, 4, 6)

What is the output? c1 = 'c' while c1 > 'a': for i in range(3): print('{:s}{:d}'.format(c1, i), end=' ') c1 = chr(ord(c1) - 1) Select one: a. c0 c1 c2 b0 b1 b2 a0 a1 a2 b. c0 c1 c2 b0 b1 b2 c. c1 c2 c3 b1 b2 b3 d. c2 c1 c0 b2 b1 b0

b. c0 c1 c2 b0 b1 b2

What is the output? c1 = 'c' while c1 > 'a': for i in range(3): print('{:s}{:d}'.format(c1, i), end=' ') c1 = chr(ord(c1) - 1) Select one: a. c2 c1 c0 b2 b1 b0 b. c0 c1 c2 b0 b1 b2 c. c1 c2 c3 b1 b2 b3 d. c0 c1 c2 b0 b1 b2 a0 a1 a2

b. c0 c1 c2 b0 b1 b2

After a function's last statement is executed, the program returns to the next line after the _____. Select one: a. start of the program b. function call c. function definition d. import statement

b. function call

Fill in the blank so that the loop displays all odd numbers from 1 to 100. i = 1 while i <= 100: print(i) i = _____ Select one: a. i + 1 b. i + 2 c. 2 d. 1

b. i + 2

Which branch structure does a program use to output "Yes" if a variable's value is positive, or "No" otherwise? Select one: a. else b. if-else c. if

b. if-else

Which expression replaces ZZZ to make the loop ask for names until 'quit' is entered? name = input("What is your name ('quit' to exit)? ") while ZZZ: print('Hello, ', name) name = input("What is your name ('quit' to exit)? ") Select one: a. 'quit' is False b. name != 'quit' c. name is not 'quit' d. name == 'quit'

b. name != 'quit'

What is a possible output? rentals = { 'skis' : 20.00, 'boots' : 10.00, 'skates' : 4.00 } for x in rentals: print(x, end=' ') Select one: a. 20.00 10.00 4.00 b. skis boots skates c. skis: 20.00 boots: 10.00 skates: 4.00 d. x x x

b. skis boots skates

Which correctly called the sub() function? sub = function(x1, x2){ z = x1^2 + 2*x2 } Select one: a. sub(2,4,6) b. sub(2,4) c. sub( [ 2, 4] ) d. sub(2 4)

b. sub(2,4)

Fill in the blank so that the output is a count of how many negative values are in temperatures. temperatures = [-2, 8, 4, -7, 18, 3, -1] count = 0 for t in temperatures: if _____: count = count + 1 print("Total negative temperatures:", count) Select one: a. temperatures < 0 b. t < 0 c. t[temperatures] < 0 d. temperatures[t] < 0

b. t < 0

What is the output? for j in range(2): for k in range(4): if (k == 2): break print('{:d}{:d}'.format(j, k), end=' ') Select one: a. 00 01 02 b. 00 01 02 10 11 12 c. 00 01 10 11 d. 00 01 02 03

c. 00 01 10 11

What is the output? def calc(num1, num2): print(1 + num1 + num2, end=' ') calc(4, 5) calc(1, 2) Select one: a. 9 3 b. 145 112 c. 10 4 d. 4, 5, 1, 2

c. 10 4

How many times will the print statement execute? for i in range(10): for j in range(3): print('{:d}. {:d}'.format(i, j)) Select one: a. 13 b. 10 c. 30 d. 3

c. 30

How many times does the following loop iterate? i = 0 while i <= 100: print(i) i = i + 2 Select one: a. 0 b. 49 c. 51 d. 50

c. 51

What is the value of x after the following code is executed? x = 7 If x < 7 x = x + 1 x = x + 2 Select one: a. 7 b. 10 c. 9 d. 8

c. 9

Which of the following is true? Select one: a. A function must always have at least one return statement. b. A function can only return strings and numbers, not lists or dictionaries. c. A function can have any number of return statements, or no return statement at all. d. A function must have exactly one return statement, or no return statement at all.

c. A function can have any number of return statements, or no return statement at all.

Which of the following loops is best implemented with a while loop? Select one: a. Counting how many keys in a dictionary start with the letter 'A'. b. Checking to see if a list of integers contains the value 12. c. Asking the user to enter positive integers, exiting by entering -1. d. Looping through the characters in a string, and displaying 'yes' if it contains a vowel.

c. Asking the user to enter positive integers, exiting by entering -1.

With the logic block shown below, what is output when grade is assigned with the value 75? If grade < 50 Put "F" to output Else If grade < 60 Put "D" to output Else If grade < 75 Put "C" to output Else If grade < 85 Put "B" to output Else If grade <= 100 Put "A" to output ElsePut "Invalid grade" to output Select one: a. Invalid Grade b. A c. B d. C

c. B

In Python, the code that includes the keyword "def" is called a _____. Select one: a. function constructor b. function call c. function definition d. function reference

c. function definition

Which XXX/YYY combination will create a rectangle of '*' characters, with 5 rows, and each row containing 10 '*' characters? for XXX: for YYY: print('*', end='') print() Select one: a. i in range(1, 5) / j in range(1, 10) b. i in range(10) / j in range(5) c. i in range(5) / j in range(10) d. i in range(0, 4, '*'), j in range(0, 9, '*')

c. i in range(5) / j in range(10)

Which range() function call generates every even number between 20 and 30 (including both 20 and 30)? Select one: a. range(30, 20, 2) b. range(20, 30, 2) c. range(20, 31, 2) d. range(20, 22, 24)

c. range(20, 31, 2)

Which choice fills in the blank so that the output prints one line for each item in sports_list, as in: 1. Hockey? sports_list = [ 'Hockey', 'Football', 'Cricket' ] for i in _____: print('{:d}. {:s}'.format(i+1, sports_list[i])) Select one: a. range(len(sports_list-1) b. range(1, len(sports_list)) c. range(len(sports_list)) d. range(1, len(sports_list)-1)

c. range(len(sports_list))

Which XXX is valid for the following code? calc_sum = function(a, b){ return(a+b) } XXX print Select one: a. calc_sum(y, 4, 5) b. y = calc_sum() c. y = calc_sum(4,5) d. y = calc_sum(4 + 5)

c. y = calc_sum(4,5)

If x = 10 and y = 20, which expression is True? a. y <= x b. y != 2*x c. y >= x d. x == y

c. y >= x

What sequence is generated by range(4)? Select one: a. 0 1 2 3 4 b. 4 c. 1 2 3 4 d. 0 1 2 3

d. 0 1 2 3

What is the output? num = 10; while num <= 15: print(num, end=' ') if num == 12: break num += 1 Select one: a. 10 b. 10 11 c. 10 11 12 13 14 15 d. 10 11 12

d. 10 11 12

What is the output? x = 18 while x % 3 == 0: print(x, end=' ') x = x // 3 Select one: a. 6 b. 6 2 c. 18 6 2 d. 18 6

d. 18 6

What is the output? my_list = [3, 7, 0, 2, -1, 8] index = 0 while my_list[index] > 0: print(my_list[index], end=' ') index += 1 Select one: a. 3 7 0 2 -1 b. 3 7 0 2 c. 3 7 0 d. 3 7

d. 3 7

What is the value of grade after the following code is executed? grade = 70 if (x > 70) { bonus_points = 2 grade = grade + bonus_points } cat("Your Grade is", grade) Select one: a. 71 b. 68 c. 72 d. 70

d. 70

Which of the following loops is best implemented with a for loop? Select one: a. Starting from a user-entered integer, increment the value until the value is a prime number. b. Reading values from a temperature sensor until it gives a value greater than 100 degrees. c. Asking a user to enter names until the user enters 'Quit'. d. Counting the number of negative values in a list of integers.

d. Counting the number of negative values in a list of integers.

The following program prints the number of integers in my_list that are greater than the previous integer in the list. Which choice fills in the blank to complete the for loop? my_list = [ 3, 2, 7, 8, 6, 9 ] count = 0 for _____: if my_list[i] > my_list[i-1]: count = count + 1 print(count) Select one: a. i in range(0, len(my_list)+1) b. i in range(1, len(my_list)+1) c. i in range(0, len(my_list)) d. i in range(1, len(my_list))

d. i in range(1, len(my_list))

In the following code, the variable size is the function's _____. def print_square_area(size): area = size * size print("A square of size {} has area {}".format(size, area)) s = float(input('Enter size of square: ')) print_square_area(s) Select one: a. value b. property c. argument d. parameter

d. parameter

What is the missing function name so that the output is: Cairo New York Paris Sydney? cities = ['Sydney', 'Paris', 'New York', 'Cairo'] for c in _____(cities): print(c, end=' ') Select one: a. backwards b. inverse c. list d. reversed

d. reversed

What is the ending value of x? x = 0 i = 5 while (i > 1){ x = x + i i = i - 1 } Answer:

x=14

What is the ending value of x? x = 0 i = 1 while i <= 6: x += i i += 2 Answer:

x=9