Java Certification – Arrays

1. Assume you have two instances of Student Object. Which is following array declaration is correct ?

1. Student students(student1, student2});
2. Student [] students(student1,student2);
3. Student students = [student1,student2];
4. Student [] students = {student1, student2};

Answer: 4

2. A Product class contains an encapsulated array field of Product items. How would you write a getProductItems method in the Product class to return these items?

A) public Product getProductItems(){
    return items;
}

B) public void getProductItems(Product items){
    return items;
}

C) public void getProductItems(){
    return items;
}


D) public Product[] getProductItems(){
    return items;
}

Answer: D

3. What is the output of the following program?

	public static final int size = 3;
	public static void main(String[] args) {
		int[] data = new int[size];
		data[3] = 30;
		for(int i=0;i<data.length;i++) {
			System.out.println(data[i]);
		}
		
	}

1. 0, 0 ,30
2. Compilation Error
3. Runtime Error
4. Non Of the above

Answer: 3 throws java.lang.ArrayIndexOutOfBoundsException