Identify the form of each sentence given here from

Complete the Java method to check if an integer array arr is empty.

public class ArrayChecker {

You are trying to parse a JSON string in Java using a library like org.json.

import org.json.JSONObject;

import org.json.JSONException;

What is the primary purpose of a system call?

What is the primary advantage of using an Object-Oriented Programming approach?

 In a digital communication system’s block diagram, which of the below components can be found at the receiver?

Which of the following statements best describes a "trap door" in the context of computer security?

Consider the following Java code:

public class LengthMix {

    public static void main(String[] args) {

In a perfectly balanced Binary Search Tree with N nodes, what is the worst-case time complexity for searching for an element?

Spark performs better than Hadoop MapReduce because:

Inheritance is an OOP principle that establishes an "is-a" relationship between classes. What does this relationship primarily allow?