Question 1

1import java.util.*;
2class Student {
3    String name;
4    double grade;
5    public Student(String n, double g) {
6        name = n;
7        grade = g;
8    }
9}
10public class TestGrades {
11    public static void main(String[] args) {
12        List<Student> students = new ArrayList<>();
13        students.add(new Student("Anu", 85.5));
14        students.add(new Student("Bindu", 92.0));
15        students.add(new Student("Hari", 78.0));
16        students.add(new Student("David", 70.0));
17        students.add(new Student("Hasan", 65.0));
18        //CODE BLOCK
19    }
20}

Consider the Java code given below that should print the names of students whose grades are between 70.0 and 90.0 (both inclusive). import java.util.*; class Student { String name; double grade; public Student(String n, double g) { name = n; grade = g; } } public class TestGrades { public static void main(String[] args) { List<Student> students = new ArrayList<>(); students.add(new Student("Anu", 85.5)); students.add(new Student("Bindu", 92.0)); students.add(new Student("Hari", 78.0)); students.add(new Student("David", 70.0)); students.add(new Student("Hasan", 65.0)); //CODE BLOCK } } Choose the correct option(s) to fill in place of `CODE BLOCK` to obtain the right answer. Consider the code given below.\ interface Vehicle \{\ public abstract double getFuelEfficiency();\ \}\ class Car implements Vehicle, Cloneable \{\ protected double fuelCapacity;\ protected double mileage;\ public Car(double fuel, double m) \{\ fuelCapacity = fuel;\ mileage = m;\ \}\ public double getFuelEfficiency() \{\ return fuelCapacity \* mileage;\ \}\ public Car clone() throws CloneNotSupportedException \{\ return (Car) super.clone();\ \}\ \}\ class ElectricCar extends Car \{\ public ElectricCar(double batteryCapacity, double mileage) \{\ super(batteryCapacity, mileage);\ \}\ public ElectricCar clone() throws CloneNotSupportedException \{\ return (ElectricCar) super.clone();\ \}\ \}\ public class VehicleTest \{\ public static void main(String\[\] args) \{\ try \{\ ElectricCar e1 = new ElectricCar(50, 2);\ ElectricCar e2 = e1.clone();\ e1.fuelCapacity = 100;\ System.out.print(e1.getFuelEfficiency() + e2.getFuelEfficiency());\ \} catch (CloneNotSupportedException e) \{\ System.out.println("Cloning not supported");\ \}\ \}\ \}\ What will the output be? Consider the Java code given below. import java.util.*; public class PalindromeChecker { public static boolean isPalindrome(String str) { Stack<Character> s = new Stack<>(); Deque<Character> d = new ArrayDeque<>(); for (char ch : str.toCharArray()) { s.push(ch); d.add(ch); } // CODE BLOCK return true; } public static void main(String[] args) { String word1 = "level"; String word2 = "hello"; System.out.println("Is word1 a palindrome? " + isPalindrome(word1)); System.out.println("Is word2 a palindrome? " + isPalindrome(word2)); } } Choose the correct option to fill in place of `CODE BLOCK` so that the output is: Is word1 a palindrome? true Is word2 a palindrome? false Please note the following methods from type `Stack` and `Deque`: `pop()`: Removes the object at the top of this stack and returns it. `poll()`: Retrieves and removes the head of this deque, or returns null if empty. `peek()`: Retrieves, but does not remove, the head of this deque, or returns null if empty.