Python - Chapter 4

Analyze the following code: even = False if even = True: print("It is even!")

The program has a syntax error in line 2 if even = True is not a correct condition. It should be replaced by if even == True: or if even:

Assume x = 4 and y = 5, Which of the following is true? A. x < 5 and y < 5 B. x < 5 or y < 5 C. x > 5 and y > 5 D. x > 5 or y > 5

B. x < 5 or y < 5

Assume x = 4 and y = 5, Which of the following is true? A. not (x == 4) B. x != 4 C. x == 5 D. x != 5

D. x != 5

What will be displayed by the following code? ch = 'F' if ch >= 'A' and ch <= 'Z': print(ch)

F

Suppose income is 4001, what will be displayed by f the following code? if income > 3000: print("Income is greater than 3000") elif income > 4000: print("Income is greater than 4000")

Income is greater than 3000

What will be displayed by the following code? isCorrect = False print("Correct" if isCorrect else "Incorrect")

Incorrect

Suppose isPrime is a boolean variable, which of the following is the correct and best statement for testing if isPrime is true.

if isPrime:

The "less than or equal to" comparison operator is __________

<=

The equal comparison operator is __________

==

Which of the Boolean expressions below is incorrect? A. True and 3 => 4 B. !(x > 0) and (x > 0) C. (x > 0) or (x < 0) D. (x != 0) or (x = 0) E. (-10 < x < 0)

A,B,D

Which of the following statements are True? A. (x > 0 and x < 10) is same as (x > 0 and x < 10) B. (x > 0 or x < 10) is same as (0 < x < 10) C. (x > 0 or x < 10 and y < 0) is same as (x > 0 or (x < 10 and y < 0)) D. (x > 0 or x < 10 and y < 0) is same as ((x > 0 or x < 10) and y < 0)

A. (x > 0 and x < 10) is same as (x > 0 and x < 10) C. (x > 0 or x < 10 and y < 0) is same as (x > 0 or (x < 10 and y < 0))

Which of the following is equivalent to x != y? A. not (x == y) B. x > y and x < y C. x > y or x < y D. x >= y or| x <= y

A. not (x == y) C. x > y or x < y

Suppose you write the code to display "Cannot get a driver's license" if age is less than 16 and "Can get a driver's license" if age is greater than or equal to 16. Which of the following code is correct? I: if age < 16: print("Cannot get a driver's license") if age >= 16: print("Can get a driver's license") II: if age < 16: print("Cannot get a driver's license") else: print("Can get a driver's license") III: if age < 16: print("Cannot get a driver's license") elif age >= 16: print("Can get a driver's license") IV: if age < 16: print("Cannot get a driver's license") elif age == 16: print("Can get a driver's license") elif age > 16: print("Can get a driver's license")

All correct

Analyze the following code fragments that assign a boolean value to the variable even. Code 1: if number % 2 == 0: even = True else: even = False Code 2: even = True if number % 2 == 0 else False Code 3: even = number % 2 == 0

All three are correct, but Code 3 is preferred.

Which of the following is the correct expression that evaluates to True if the number x is between 1 and 100 or the number is negative?21. To check whether a char variable ch is an uppercase letter, you write ___________

B. (ch >= 'A' and ch <= 'Z') D. ('A' <= ch <= 'Z')

The __________ function immediately terminates the program

sys.exit()

Given |x - 2| <= 4, Which of the following is true?

x - 2 <= 4 and x - 2 >= -4

Suppose you write the code to display "Cannot get a driver's license" if age is less than 16 and "Can get a driver's license" if age is greater than or equal to 16. Which of the following code is the best? I: if age < 16: print("Cannot get a driver's license") if age >= 16: print("Can get a driver?s license") II: if age < 16: print("Cannot get a driver's license") else: print("Can get a driver's license") III: if age < 16: print("Cannot get a driver's license") elif age >= 16: print("Can get a driver's license") IV: if age < 16: print("Cannot get a driver's license") elif age == 16: print("Can get a driver's license") elif age > 16: print("Can get a driver's license")

Code II

Which of the following operators are right-associative A. * B. + C. % D. and E. =

E. =

Analyze the following code. even = False if even: print("It is even!")

The code displays nothing.

What is the value of the following expression? True or True and False

True

The word True is ________

a Python keyword a Boolean literal

random.random() returns ____________

a float number i such that 0 <= i < 1.0

Which of the following code displays the area of a circle if the radius is positive.

if radius > 0: print(radius * radius * 3.14159)

The following code displays ___________ temperature = 50 if temperature >= 100: print("too hot") elif temperature <= 40: print("too cold") else: print("just right")

just right

Suppose x = 1, y = -1, and z = 1. What will be displayed by the following statement? if x > 0: if y > 0: print("x > 0 and y > 0") elif z > 0: print("x < 0 and z > 0")

nothing displayed

To generate a random integer between 0 and 5, use ________________

random.randint(0, 5) random.randrange(0, 6)

Given |x - 2| >= 4, Which of the following is true?

x - 2 >= 4 or x - 2 <= -4

What is the output of the following code? x = 0 if x < 4: x = x + 1 print("x is", x)

x is 1

The order of the precedence (from high to low) of the operators +, *, and, or is:

*, +, and, or

What is y after the following statement is executed? x = 0 y = 10 if x > 0 else -10

-10

random.randint(0, 1) returns ____________

0 or 1

Analyze the following code: Code 1: f number % 2 == 0: even = True else: even = False Code 2: even = number % 2 == 0

Both Code 1 and Code 2 are correct, but Code 2 is better.