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Java Declarations and Access Control Quiz

Description: Java Declarations and Access Control Quiz
Number of Questions: 8
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Tags: java

You want subclasses in any package to have access to members of a superclass. Which is the most restrictive access that accomplishes this objective?

  1. public

  2. protected

  3. private

  4. transient

Answer: 2
Explanation:

protected makes a member accessible only to classes in the same package or subclass of the class

What is the most restrictive access modifier that will allow members of one class to have access to members of another class in the same package?

  1. public

  2. abstract

  3. protected

  4. synchronized

  5. default access

Answer: 5
Explanation:

default access is the "package oriented" access modifier.

Which cause a compiler error?

  1. int[ ] scores = {3, 5, 7};

  2. int [ ][ ] scores = {2,7,6}, {9,3,45};

  3. String cats[ ] = {"Fluffy", "Spot", "Zeus"};

  4. boolean results[ ] = new boolean [] {true, false, true};

Answer: 2

You want a class to have access to members of another class in the same package. Which is the most restrictive access that accomplishes this objective?

  1. public

  2. private

  3. protected

  4. default access

Answer: 4

Which one creates an instance of an array?

  1. int[ ] ia = new int[15];

  2. float fa = new float[20];

  3. char[ ] ca = "Some String";

  4. int ia[ ] [ ] = { 4, 5, 6 }, { 1,2,3 };

Answer: 1

Which of the following class level (nonlocal) variable declarations will not compile?

  1. protected int a;

  2. transient int b = 3;

  3. private synchronized int e;

  4. volatile int d;

Answer: 3

Given a method in a protected class, what access modifier do you use to restrict access to that method to only the other members of the same class?

  1. final

  2. static

  3. private

  4. protected

Answer: 3
Explanation:

The private access modifier limits access to members of the same class.

Which is a valid declaration within an interface?

  1. public static short stop = 23;

  2. protected short stop = 23;

  3. transient short stop = 23;

  4. final void madness(short stop);

Answer: 1
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