Deck 3: Control Statements, Part 1

Question 1

What is wrong with the following while loop?
While sum <= 1000 )
Sum = sum - 30;

A) The parentheses should be braces.
B) Braces are required around sum = sum - 30;.
C) There should be a semicolon after while sum <= 1000 ).
D) sum = sum - 30 should be sum = sum + 30 or else the loop may never end.

Answer 1

D

Question 2

In indefinite repetition, an input value:

A) Should always be evaluated before being processed.
B) Should always be processed directly after it is entered.
C) Should never be modified.
D) Can be entered, processed, and evaluated in any order.

Answer 2

A

Question 3

The data type bool:

A) Can take on values true and false.
B) Can take on any expression as a value.
C) Can take on values -1, 0 or 1.
D) Can only be used in a selection statement.

Answer 3

A

Question 4

Which operation does not take place in the following example?
Int x = 21;
Double y = 6;
Double z = 14;
Y = x / z;
X = 5.5 * y;

A) Implicit conversion.
B) Promotion.
C) Explicit conversion.
D) Truncation.

Question 5

An uninitialized local variable contains:

A) The value last stored in the memory location reserved for that variable.
B) No value.
C) A value of zero.
D) A randomly assigned value.

Question 6

Which of the following is a double-selection statement?

A) if.
B) if…else.
C) do…while.
D) switch.

Question 7

If grade has the value of 60, what will the following code display?
If grade >= 60 )
Cout << "Passed";

A) nothing.
B) 60
C) Passed
D) cout << "Passed";

Question 8

Indefinite repetition is controlled by a:

A) Counter.
B) Sentinel value.
C) Absence of a condition.
D) Non-constant condition.

Question 9

Which of the following encompasses the other three?

A) Sequence structure.
B) Repetition structure.
C) Control structure.
D) Selection structure.

Question 10

Using a while loop's counter-control variable in a calculation after the loop ends often causes a common logic error called:

A) A fatal logic error.
B) A counter exception.
C) A syntax error.
D) An off-by-one error.

Question 11

What is the final value of x after performing the following operations?
Int x = 21;
Double y = 6;
Double z = 14;
Y = x / z;
X = 5.5 * y;

A) 8.25
B) 5.5
C) 5
D) 8

Question 12

Which of the following is true of pseudocode?

A) It's executed by the computer.
B) It helps the programmer "think out" a program.
C) It includes declarations and all types of statements.
D) All of the above are false.

Question 13

A block:

A) Must contain exactly three statements.
B) Cannot contain declarations.
C) Is a compound statement.
D) Is represented by placing a semicolon ;) where a statement would normally be.

Question 14

The conditional operator ?:):

A) Is the only ternary operator in C++.
B) Is a unary operator.
C) Associates from left to right.
D) Accepts two operands.

Question 15

Which of the following is a repetition statement?

A) if.
B) if…else.
C) do…while.
D) switch.

Question 16

How many times will the following loop print hello?
I = 1;
While i <= 10 )
Cout << "hello";

A) 0.
B) 9.
C) 10.
D) An infinite number of times.

Question 17

Display correct if answer is equal to 7 and incorrect if answer is not equal to 7?

A) if answer == 7 ) cout << "correct";
Else
Cout << "incorrect";
B) cout << answer == 7 ? "correct" : "incorrect";
C) cout << answer == 7 ? "correct" : "incorrect" );
D) answer == 7 ? cout << "correct" : cout << "incorrect";

Question 18

In an activity diagram for an algorithm, what does a solid circle surrounded by a hollow circle represent?

A) Initial state.
B) Final state.
C) Action state.
D) Transition.

Question 19

Pseudocode does not include:

A) Declarations.
B) Input/output.
C) Algorithms.
D) Control structures.

Question 20

Specifying the order in which statements are to be executed in a computer program is called:

A) An algorithm.
B) Transfer of control.
C) Program control.
D) Pseudocode.

Question 21

Which of the following operations has the highest precedence?

A) Postincrement.
B) Multiplication.
C) Addition.
D) Assignment.

Question 22

Assuming that x is equal to 4, which of the following statements will not result in y containing the value 5 after execution?

A) y = 5;
B) y = x++;
C) y = ++x;
D) y = x + 1

Question 23

To handle situations where a loop must reinitialize a variable at the beginning of each iteration, such re-initialization could be performed by:

A) An assignment statement before the loop body.
B) A declaration inside the loop body.
C) An assignment statement after the loop body.
D) A declaration after the loop body.

Question 24

Which of the following will not increment c by 1?

A) c + 1;
B) c++;
C) ++c;
D) c += 1;

Question 25

Assuming that x and y are equal to 3 and 2, respectively, after the statement x -= y executes, the values of x and y will be:

A) x: 5; y: 3
B) x: 3; y: -1
C) x: 3; y: 5
D) x: 1; y: 2

Question 26

Having a loop within a loop is known as:

A) Recursion.
B) Doubling up.
C) Nesting.
D) Stacking.

Question 27

If x initially contains the value 3, which of the following sets x to 7?

A) x ++ 4;
B) x += 4;
C) x =+ 4;
D) x + 4 = x;