AP CSA Unit 1 Intro

Consider the following code segment.

System.out.print("Java is ");

System.out.println("fun ");

System.out.print("and cool!");

What is printed as a result of executing the code segment?

• Java is fun and cool!
• Java isfun

  and cool!

• Java is

  fun

  and cool!

• Java is fun

  and cool!

Consider the following code segment.

System.out.print("cat ");

System.out.println("dog ");

System.out.println("horse ");

System.out.print("cow ");

What is printed as a result of executing the code segment?

• cat dog horse cow
• cat dog

  horse

  cow

• cat dog horse cow
• cat

  dog

  horse cow

• cat

  dog

  horse

  cow

Consider the following code segment.

System.out.println(hello);  // Line 1

System.out.print(world);    // Line 2

The code segment is intended to produce the following output but does not work as intended.

hello

world

Which of the following changes can be made so that the code segment produces the intended output?

• Inserting System.out.print(); between lines 1 and 2

• 
  Inserting System.out.println(); between lines 1 and 2

• Changing println in line 1 to print

• Changing print in line 2 to println

• Enclosing hello in line 1 and world in line 2 in quotation marks

Each of the following code segments is intended to print the word Hello. Which of the following code segments works as intended?

1. 1. System.out.print("Hello");

2. 2. System.out.print(Hello);

3. 3. System.out.print(He);

4. System.out.print(llo);

• 1 only

• 2 only

• 3 only

• 1 and 2

• 2 and 3

Which statement correctly declares a variable that can store a temperature rounded to the nearest tenth of a degree?

• boolean patientTemp;

• double patientTemp;

• int patientTemp;

• patientTemp = 0;

• patientTemp = 0.0;

A teacher determines student percentages in a course as the points a student earns divided by the total points available in the grading period. Points are awarded only in whole number increments, but student percentages are to be stored as decimals.

The following code segment appears in a program used to compute student percentages. Points that a student earns are stored in pointsEarned, the total points available in the grading period are stored in totalPoints, and the student percentage is stored in percentage.

int pointsEarned;

/* missing code */

Which of the following is most appropriate to replace /* missing code */ in the program?

• int totalPoints;

  int percentage;

• double totalPoints;

  int percentage;

• int totalPoints;

  double percentage;

• int totalPoints;

  boolean percentage;

• double totalPoints;

  boolean percentage;

Consider the following code segment:

/* data type 1 */ x = 0.5;

/* data type 2 */ y = true;

Which of the following best describes the data types that should be used to replace/* data type 1 / and / data type 2 */ so that the code segment compiles without error?

• The variable x should be declared as an int and the variable y should be declared as a boolean.

• The variable x should be declared as an int and the variable y should be declared as an int.

• The variable x should be declared as a double and the variable y should be declared as an int.

• The variable x should be declared as a double and the variable y should be declared as a boolean.

• The variable x should be declared as a boolean and the variable y should be declared as a boolean.

Consider the following code segment.

int x;

int y;

x = 3;

y = /* missing expression */;

x = 1 + 2 * y;

System.out.print(x);

System.out.println(y);

Which of the following can be used as a replacement for /* missing expression */ so that the code segment prints 94 ?

• 3

• x

• x - 1

• x + 1

• 1 - 2 * x

Consider the code segment below.

int x = 10;

int y = 20;

System.out.print(y + x / y);

What is printed as a result of executing the code segment?

• 1

• 1.5

• 3

• 20

• 20.5

Consider the following code segment.

int j = 10;

int k = 8;

j += 2;

k += j;

System.out.print(j);

System.out.print(" ");

System.out.println(k);

What is printed when the code segment is executed?

• 2 2

• 2 10

• 10 8

• 12 12

• 12 20