AP CSA Review Set #1

5-1-1: What is the value of grade when the following code executes and score is 93?

if (score >= 90) grade = "A"; if (score >= 80) grade = "B"; if (score >= 70) grade = "C"; if (score >= 60) grade = "D"; else grade = "E";

• A

• B
• C
• D

Which of the following is equivalent to the code segment below?

if (x > 2) x = x * 2; if (x > 4) x = 0;

•  x = 0;
• if (x > 2) x *= 2;
• if (x > 2) x = 0;
•  if (x > 2) x = 0; else x *= 2;

What does the following code print when x has been set to -5?

if (x < 0) System.out.println("x is negative"); else if (x == 0) System.out.println("x is zero"); else System.out.println("x is positive"); 

•  x is negative
• x is zero
• x is positive

What does the following code print when x has been set to 2000?

if (x < 0) System.out.println("x is negative"); else if (x == 0) System.out.println("x is zero"); else System.out.println("x is positive"); 

• x is negative
•  is zero
• x is positive

Given the following code segment, which of the following is true?

String s1 = new String("Hi There");

String s2 = new String("Hi There");

String s3 = s1;

I. (s1 == s2)

II. (s1.equals(s2))

III. (s1 == s3)

IV. (s2.equals(s3))

• II and IV

• II, III, and IV

• I, II, III, IV

• II only

• IV only

What does the following code print?

System.out.println("13" + 5 + 3);

• 21

• 1353

• It will give a run-time error

• 138

• It will give a compile-time error

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After the following code is executed, which of I, II and/or III will evaluate to true?

String s1 = "xyz";

String s2 = s1;

String s3 = s2;

I. s1.equals(s3)

II. s1 == s2

III. s1 == s3

• I, II, III

• I only

• II only

• III only

• II and III only

What is output from the following code?

String s = "Georgia Tech";

String s1 = s.substring(0,7);

String s2 = s1.substring(2);

String s3 = s2.substring(0,3);

System.out.println(s3);

• org

• eor

• eorg

• orgi

• You will get an index out of bounds exception

Inheritance is used when the relationship between two classes is a(n) _______ relationship.

• "HAS-A"
• "PART-OF-A"
• "IS-A"
• inverse

The following Syntax is used for?

class Subclass-name extends Superclass-name

{

//methods and fields

}

• Polymorphism

• Encapsulation

• Inheritance

• None of the above