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Exam 4: Control Structures I (Selection)

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Question 1

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The value of the expression 7 + 8 <= 15 is ____________________.

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Question 2

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What is the output of the following C++ code? int x = 35; int y = 45; int z; if (x > y) $\quad$ z = x + y; else $\quad$ z = y - x; Cout << x << " " << y << " " << z << endl;

A) 35 45 80
B) 35 45 10
C) 35 45 -10
D) 35 45 0

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Question 3

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What is the output of the following code fragment if the input value is 4? int num; Int alpha = 10; Cin >> num; Switch (num) { Case 3: $\quad$ Alpha++; $\quad$ Break; Case 4: Case 6: $\quad$ Alpha = alpha + 3; Case 8: $\quad$ Alpha = alpha + 4; $\quad$ Break; Default: $\quad$ Alpha = alpha + 5; } Cout << alpha << endl;

A control structure alters the normal sequential flow of execution in a program.

The expression (x >= 0 && x <= 100)evaluates to false if either x < 0 or x >= 100.

A(n)____________________ structure does not require the evaluation of a logical expression.

Once an input stream enters a(n)____________________ state,all subsequent input statements associated with that input stream are ignored,and the computer continues to execute the program,which produces erroneous results.

In C++,the logical operator AND is represented by ____________________.

The symbol > is a(n)____________________ operator.

Suppose x is 5 and y is 7.Choose the value of the following expression: (x != 7) && (x <= y)

What is the output of the following code? char lastInitial = 'A'; Switch (lastInitial) { Case 'A': $\quad$ Cout << "section 1" << endl; $\quad$ Break; Case 'B': $\quad$ Cout << "section 2" << endl; $\quad$ Break; Case 'C': $\quad$ Cout << "section 3" << endl; $\quad$ Break; Case 'D': $\quad$ Cout << "section 4" << endl; $\quad$ Break; Default: $\quad$ Cout << "section 5" << endl; }

Which of the following is the "not equal to" relational operator?

In a ____ control structure,the computer executes particular statements depending on some condition(s) .

What does <= mean?

The conditional operator ?: takes ____ arguments.

For a program to use the assert function,it must include which of the following?

Every else must be paired with a(n)____________________.

What is the output of the following code? if (6 > 8) { $\quad$ Cout << " ** " << endl ; $\quad$ Cout << "****" << endl; } else if (9 == 4) $\quad$ cout << "***" << endl; else $\quad$ cout << "*" << endl;

To output results correctly,the switch structure must include a(n)____________________ statement after each cout statement,except the last cout statement.

Which of the following operators has the highest precedence?