Mid Term Study Arrays + Syntax

Question 1

How to create an array of ints with 5 spots.
Then assign the index 3 a value of 5

Answer 1

int [] nums = new int [5];

nums[3] = 5;

Question 2

What is the syntax for the FOR EACH loop?
iterate through int [] marks = {1, 2, 3, 4, 5}

Answer 2

for (int mark : marks){
}

Question 3

When a reference variable isn’t pointing to an object (by holding the object’s address), it contains a _______

Answer 3

NULL value

Question 4

When we create an array of ints and array of objects what does each element get initialized as?

int [] nums = new int[5]

Student [] students = new Student[5];

Answer 4

for array of ints they would all be initialized as 0

for array of objects they would be initialized as NULL