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Exam 4: Making Decisions

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Question 1

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This operator is known as the logical OR operator.

A) --
B) //
C) #
D) ||
E) None of these

F) B) and D)
G) B) and C)

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Question 2

Multiple Choice

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What will following segment of code output? int x = 5; If (x = 2) $\quad$ cout << "This is true!" << endl; else $\quad$ cout << "This is false!" << endl; cout << "This is all folks!" << endl;

A) This is true!
B) This is false!
C) This is true!
This is false!
D) This is true!
This is all folks!
E) None of these

F) A) and D)
G) A) and C)

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Question 3

Multiple Choice

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

When a program lets the user know that an invalid choice has been made, this is known as:

What will the following segment of code output if 11 is entered at the keyboard? int number; cin >> number; if (number > 0) $\quad$ cout << "C++"; else $\quad$ cout << "Soccer"; cout << " is "; cout << "fun" << endl;

What will the following segment of code output? score = 40; if (score > 95) $\quad$ cout << "Congratulations!\n"; cout << "That's a high score!\n"; cout << "This is a test question!" << endl;

The default section is required in a switch statement.

If you place a semicolon after the statement if (x < y)

This operator performs a logical NOT operation.

What will be the output of the following code segment after the user enters 0 at the keyboard? int x = -1; cout << "Enter a 0 or a 1 from the keyboard: "; cin >> x; if (x) $\quad$ cout << "true" << endl; else $\quad$ cout << "false" << endl;

Input values should always be checked for

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

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

This statement lets the value of a variable or expression determine where the program will branch to.

When an if statement is placed within the conditionally-executed code of another if statement, this is known as:

As a rule of style, when writing an if statement you should indent the conditionally-executed statements.

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

Given that x = 2, y = 1, and z = 0, what will the following cout statement display? cout << "answer = " << (x || !y && z) << endl;

An expression that has any value other than 0 is considered true by an if statement.

What will the following segment of code output? You can assume the user enters a grade of 90 from the keyboard. cout << "Enter a test score: "; cin >> test_score; if (test_score < 60) ; $\quad$ cout << "You failed the test!" << endl; if (test_score > 60) $\quad$ cout << "You passed the test!" << endl; else $\quad$ cout << "You need to study for the next test!";