AP Computer Science A - Unit 1 Primitive Types Practice Test

Question 1 What data type would be best used to record the number of people at a party? A. String B. Real C. Boolean D. Integer

Question 2 What is the output for this statement? System.out.print("Good "); System.out.print("Morning!"); A. GoodMorning! B. Good Morning! C. Good Morning! D. Good.Morning!

Question 3 What data type would be best used to record an email address? A. Real B. Integer C. String D. Character

Question 4 Consider the following code: int a = 14; int b = -15; int c = 22; int d = 11; if(a > 12 && b < -14 && c < d) { System.out.println("YAY!!!!"); } else if (d - 20 < b) { System.out.println("GO DO MORE PROGRAMMING!"); } else if(a + 12 >= c) { System.out.println("This is vexing...... "); } else { System.out.println("This is very fun!"); }} What is the output for the code above? A. This is very fun! B. This is vexing...... C. YAY!!!! D. GO DO MORE PROGRAMMING!

Question 5 What are the types of operators? A. Relational and assignment B. Arithmetic and logical C. Conditional and increment or decrement D. All of the above

Question 6 What is the output for this statement? System.out.println("Good "); System.out.println("Morning!"); A. Good Morning! B. Good. Morning! C. Good.Morning! D. Good Morning!

Question 7 Consider the code below: int a = 24, b = 17, c = 5, d = 7; b = b % d + a / b; a %= b; a -= 12; What is the value of a at the end of the code above? A. -8 B. -12 C. 8 D. 12

Question 8 Which of the following is a valid variable declaration in Java? A. int myInteger = 0; B. int 1myInteger = 0; C. int my Integer = 0; D. int int = 0;

Question 9 Which of the following declares a String array of size i? (Presume Java syntax.) A. String[] s[i]; B. String s = new String[i]; C. String[] s = new String[i]; D. String s[] = new String[i];

Question 10 What are the ways to create string objects in Java? A. Wrapper classes and Pool constant B. New operator only C. String literal only D. String literal and new operator

Question 11 What is the difference between double and int? A. Int can hold positive numbers only and double can hold all numbers. B. Int can hold real numbers and double can only hold imaginary numbers. C. Int can only hold integer values, double can hold any number including decimals. D. Int can hold all values whereas double can only store two-digit values.

Question 12 What data type would be the answer to the expression x < 5? A. Character B. Boolean C. String D. Real

Question 13 What is the difference between system.out.println() and system.out.print()? A. They have no difference B. System.out.println() is only for beginners and system.out.print() is for experts C. System.out.print() throws the cursor to the next line after printing the desired result. D. System.out.println() throws the cursor to the next line after printing the desired result.

Question 14 int x=2; double y=2.1; float z=3.0; int c=(x*y) + z; What is the value of c A. 7 B. 7.2 C. 6.3 D. 6

Question 15 Consider the following code: int i = 55, j = 3; System.out.println((i / j + 3) / 5); What is the output for the code above? A. 1.2 B. 4 C. 4.26667 D. 4.26666666667

Question 16 int i = 100; double d = 4.55, d2 = 3.75; int j = (int)(d * 100 + d2); What is the value of j at the end of the code's execution? A. 411 B. 458 C. 403 D. 399

Question 17 Consider the code below: int[] vals = {841,-14,1,41,49,149,14,148,14}; boolean[] bools = new boolean[vals.length]; for(int i = 0; i < vals.length; i++) { bools[i] = vals[i] > 20 && vals[i] % 2 == 0; } for(int i = 0; i < bools.length; i++) { if(bools[i]) { System.out.println(vals[i]); } } What is the output of the code above? A. false false false false false true false B. false true false true false true false C. 148 D. 841 41 49 149

Question 18 Expressions cannot contain variables of different data types. True or false? A. True B. Sometimes true C. Sometimes false D. False

Question 19 string str = "Hello" char newvar = str[4]; What is the value of newvar? A. ‘l’ B. ‘H’ C. ‘o’ D. “ ” Answer Key 1. D 2. C 3. C 4. B 5. D 6. A 7. B 8. A 9. C 10.D 11.C 12.B 13.D 14.A 15.B 16.B 17.C 18.D 19.C