Consider the Java code given below. public class MathUtils { public T getFirst(T[] arr) { // Returns the first element of the array } public double sum(T[] arr) { // Returns the sum of all elements in the array } } How does class MathUtils look after type erasure?

(B) public class MathUtils {\ public Object getFirst(Object[] arr) {\ // Returns the first element of the array\ }\ public double sum(Number[] arr) {\ // Returns the sum of all elements in the array\ }\ }

(A) public class MathUtils {\ public Object getFirst(Object[] arr) {\ // Returns the first element of the array\ }\ public double sum(Object[] arr) {\ // Returns the sum of all elements in the array\ }\ }

(C) public class MathUtils {\ public T getFirst(T[] arr) {\ // Returns the first element of the array\ }\ public double sum(T[] arr) {\ // Returns the sum of all elements in the array\ }\ }

(D) public class MathUtils {\ public Object getFirst(Object[] arr) {\ // Returns the first element of the array\ }\ public double sum(Double[] arr) {\ // Returns the sum of all elements in the array\ }\ }

Programming Concepts using Java · Quiz 2 · 23 Nov 2025 · September 2025 term

Question 5: Consider the Java code given below. How does class MathUt…

Question 5

+7 marksOne correct option

Consider the Java code given below.

java

1public class MathUtils {
2    public <T> T getFirst(T[] arr) {
3        // Returns the first element of the array
4    }
5
6    public <T extends Number> double sum(T[] arr) {
7        // Returns the sum of all elements in the array
8    }
9}

How does class MathUtils look after type erasure?

A
public class MathUtils {
public Object getFirst(Object[] arr) {
// Returns the first element of the array
}
public double sum(Object[] arr) {
// Returns the sum of all elements in the array
}
}
B
public class MathUtils {
public Object getFirst(Object[] arr) {
// Returns the first element of the array
}
public double sum(Number[] arr) {
// Returns the sum of all elements in the array
}
}
C
public class MathUtils {
public T getFirst(T[] arr) {
// Returns the first element of the array
}
public double sum(T[] arr) {
// Returns the sum of all elements in the array
}
}
D
public class MathUtils {
public Object getFirst(Object[] arr) {
// Returns the first element of the array
}
public double sum(Double[] arr) {
// Returns the sum of all elements in the array
}
}

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Correct answer

B
public class MathUtils {
public Object getFirst(Object[] arr) {
// Returns the first element of the array
}
public double sum(Number[] arr) {
// Returns the sum of all elements in the array
}
}

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Question 5 of 15 in the IIT Madras BS Programming Concepts using Java (Java) Quiz 2 paper sat on 23 Nov 2025, in the September 2025 term (IIT M DIPLOMA AN EXAM QDD2 23 Nov 2025 NEW). It carries 7 marks.

Question 5: Consider the Java code given below. How does class MathUt…

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