AP CS A Unit 1 Review

Front

Consider the following code segment.
System.out.println("W");
System.out.println("X");
System.out.print("Y");
System.out.print("Z");
What is printed as a result of executing the code segment?
Options: WXYZ, WXYZ, WX, YZ, W, X, YZ, W, X, Y, Z

Back

W
X
YZ

Front

Consider the following code segment:
int x = 10;
int y = 20;
/* missing code */
System.out.print(top / bottom);
Which of the following replacements for /* missing code */ will cause an ArithmeticException to occur?
I. int top = x - y;
int bottom = y - x;
II.int top = 2 * x;
int bottom = y - top;
III. int top = x + y;
int bottom = 2 * top;
Options: I. only, II. only, III. only, I. and II., II. and III.

Back

II. only

Front

Consider the following code segment, which is intended to display 6.0.

double fact1 = 1 / 2;
double fact2 = 3 * 4;
double product = fact1 * fact2;
System.out.println(product);

Which of the following best describes the error, if any, in the code segment? Options:
There are no errors and the code works as intended.

Either the numerator or the denominator of the fraction 1 / 2 should be cast as double.

The expression fact1 * fact2 should be cast as double.

The expressions 1 / 2 and 3 * 4 should both be cast as double.

The variables fact1 and fact2 should both be declared as int.

Back

Either the numerator or the denominator of the fraction 1 / 2 should be cast as double.

Front

Is the following identifier legal or illegal? MyFirstProgram

Back

legal

Front

Is the following identifier legal or illegal: Hello+there?

Back

illegal

Front

Is the following identifier legal or illegal: void

Back

illegal

Front

Is the following identifier legal or illegal? This-is-fun

Back

illegal

Front

Is the following legal or illegal? 4times

Back

illegal

Front

Which would be a better name for a method: DrawTriangle or drawTriangle?

Back

drawTriangle

Front

What code can be used to print a value 3 less than half the value x?

Back