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

default access is the "package oriented" access modifier.

To determine which option will cause a compiler error, we need to understand the syntax and rules of arrays in programming languages.

An array is a data structure that allows you to store multiple values of the same type under a single variable name. In most programming languages, arrays have a fixed size and can only store elements of the same type.

Now, let's analyze each option to identify if it will cause a compiler error:

A. int[ ] scores = {3, 5, 7}; This option is correct. It declares an integer array named "scores" and initializes it with three values: 3, 5, and 7. This code will not cause a compiler error.

B. int [ ][ ] scores = {2,7,6}, {9,3,45}; This option is incorrect. It declares a two-dimensional integer array named "scores" and initializes it with two rows and three columns. However, the array initializer is incorrect. Each row of a two-dimensional array should be enclosed in curly braces. The correct syntax should be: int [ ][ ] scores = {{2,7,6}, {9,3,45}}; The given code will cause a compiler error.

C. String cats[ ] = {"Fluffy", "Spot", "Zeus"}; This option is correct. It declares a String array named "cats" and initializes it with three strings: "Fluffy", "Spot", and "Zeus". This code will not cause a compiler error.

D. boolean results[ ] = new boolean [] {true, false, true}; This option is correct. It declares a boolean array named "results" and initializes it with three boolean values: true, false, and true. This code will not cause a compiler error.

Therefore, the option that will cause a compiler error is:

The Answer is: B

• Public access is the least restrictive access modifier. Members with public access can be accessed from anywhere in the program.
• Private access is the most restrictive access modifier. Members with private access can only be accessed from within the class in which they are declared.
• Protected access is a middle ground between public and private access. Members with protected access can be accessed from within the class in which they are declared, and from subclasses of that class.
• Default access is also known as package-private access. Members with default access can be accessed from any class in the same package.

So, the most restrictive access modifier that allows a class in the same package to access members of another class in the same package is Default.

Here is a table that summarizes the different access modifiers in Java:

The difference between protected and default access is that protected allows access from subclasses in other packages, while default does not. For example, if you have a class Animal in package A, and a class Dog in package B that extends Animal, then the class Dog can access the protected members of Animal, but not the default members. However, if you have a class Cat in package A that extends Animal, then the class Cat can access both the protected and the default members of Animal.

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