COSC 1336 Chapter 3 Exam Questions and Answers Latest Update Graded A+

COSC 1336 Chapter 3 Exam Questions and Answers Latest Update Graded A+ Short-circuit evaluation is performed with the not operator. - Answers False Why: ... Multiple Boolean expressions can be combined by using a logical operator to create ________ expressions. - Answers compound The not operator is a unary operator and it must be a compound expression. - Answers False Why: ... Python allows you to compare strings, but it is not case sensitive. - Answers False Why: ... Which of the following is the correct if clause to determine whether y is in the range 10 through 50? - Answers if y > 10 and y < 50 Python uses the same symbols for the assignment operator and the equality operator. - Answers False Why: ... The decision structure that has two possible paths of execution is known as ________. - Answers dual alternative The if statement causes one or more statements to execute only when a Boolean expression is true. - Answers True What is the result of the following Boolean expression, if x equals 5, y equals 3, and z equals 8? x < y and z > x - Answers False Why: ... If (x=5) < (y=3), this is False. AND = the condition, both must be true. (z=8) > (x=5), this is True The whole statement is False because it uses the AND condition not the OR condition. What is the result of the following Boolean expression, if x equals 5, y equals 3, and z equals 8? not ( x < y or z > x ) and y < z - Answers False Why: ... First: NOT = operator #1, this means the value of this expression must be reversed. so... Second: [ (x=5) < (y=3), expression 1 is False Third: OR = the operator #2, one of these must be true. (z=8) > (x=5) ], expression 2 is True - so far the sub-expression 1, in brackets, is True. ---> Now: you must reverse the value per first step. true value is now (-)False Fourth: AND= operator #3, both (sub-expression 1 and sub-expression 2 ) must be true. (y=3) < (z=8), sub-expression 2 is True. ---> This means that expressions 2-4, or sub-expression1 and sub-expression 2, as a whole is (+)True. Finally: Remember two (-)negatives make a (+)positive. This contains one neg., First step and one pos., expression 2-4 as a whole, so this would print that the compound expression is False. What is the result of the following Boolean expression, if x equals 5, y equals 3, and z equals 8? x < y or z > x - Answers True Why: ... If (x=5) < (y=3), this is False. OR = the operator , one of these expressions must be true. (z=8) > (x=5), this is True