COSC 1336 Chapter 4 Decisions Quiz Part B

This operator takes an operand and reverses its truth or falsehood:

!

Which of the following is evaluated first, given the expression: A && B | | C && !D

!D

This operator represents the logical AND:

&&

When a relational expression is FALSE, it has the value

0

What is assigned to the variable result given the statement below with the following assumptions: x = 10, y = 7, and x, result, and y are all int variables. result = x >=y;

1

What is the output of the following segment of code if the value 4 is input by the user? int num; int total = 0; coutn<< "Enter a number from 1 to 10: "; cin >> num; switch (num) { case 1: total = 1; case 2: total = 5; case 3: total = 10; case 4: total = total + 3; case 8: total = total + 6; default: total = total + 4; } cout << total << endl; }

13

What is the output of the following segment of code if the value 4 is input by the user? int num; int total = 0; cout<< "Enter a number from 1 to 10: "; cin >> num; switch (num) { case 1: total = 1; break; case 2: total = 5; break; case 3: total = 10; break; case 4: total = total + 3; break; case 8: total = total + 6; break; default: total = total + 4; } cout << total << endl; }

3

Which value can be entered into the following code segment to display the message "That number is acceptable"? int number; cin >> number; if (number > 10 && number < 100) cout << "That number is acceptable. \n"; else cout << "That number is not acceptable. \n";

99

The __________ is an equality (or comparison) operator.

==

Given the if/else statement if (a < 5) b = 12; else d = 30;

a < 5 ? b = 12 : d = 30;

Without this statement appearing in a switch construct, the program " falls thorugh" all of the statements below the one with the matching case expression.

break

What is the value of the following expression? true && false

false

Which line in the following program will cause a compiler error? 1 #include <iostream> 2 using namespace std; 3 int main () 4 { 5 int number = 5; 6 if (number >= 0 && <= 100) 7 cout << "passed. \n"; 8 else 9 cout << "failed. \n"; 10 return 0; 11 }

line 6

These operators connect two or more relational expressions into one, or reverse the logic of an expression.

logical

Given the following code segment, what is the output? int x = 1, y = 1, z = 1; y = y + z; x = x + y; cout << "result = " << (x < y ? y : x) << endl;

result = 3

The default section of a switch statement performs a similar task similar to the __________ portion of an if/else if statement.

trailing else

What is the value of the following expressin? true && !false

true

What is the value of the following expression? true && true

true

What is the value of the following expression? true | | false

true

Which of the following expressions will determine whether x is less than or equal to y?

x <= y

This operator represents the logical OR:

| |