User-Defined Methods

Appeared in 10 of the 11 available papers.

Examined in

10 of 11 papers

Appears almost every year — treat as core

Typically worth

15.4 marks

Average per paper it appears in · 154 marks in total

Usual form

MCQ

44% of this chapter's 32 questions

Needs a diagram

No diagram questions in this chapter

Question-type distribution

MCQ14
Program10
Short answer6
Difference2

Most frequent topics

Types of errors 6Method prototypes 3Pure and impure methods 2Call by value and call by reference 2Formal and actual parameters 2Return type in a method prototype 1Polymorphism 1Method overloading — three versions of format() 1

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Print chapter question bank

Showing 25 of 32 matching questions (154 marks).

25 questions

Choose the correct answers to the questions from the given options. (Do not copy the questions, write only the correct answers.)

1(x)2026

MCQModerate1 mark

In the following method prototype to accept a character, an integer and return YES or NO, fill in the blank to complete the method prototype. public __________ someMethod(char ch, int n)

(a)boolean
(b)String
(c)int
(d)double

1(xi)2026

MCQModerate1 mark

In a calculator which Java feature allows multiple methods named calculate() for the different operations?

(a)abstraction
(b)inheritance
(c)encapsulation
(d)polymorphism

2(vii)2026

ProgramModerate2 marks

The following program segment calculates and displays the factorial of a number. [Example: Factorial of 5 is 1 x 2 x 3 x 4 x 5 = 120] int p, n = 5, f = 0; for(p = n; p > 0; p--) f *= p; System.out.println(f); Name the type of error if any; correct the statement to get the desired output.

72026

ProgramHard15 marks

Define a class to overload the method format as follows: void format() - To print the following pattern using Nested for loops only: 1 2 3 4 5 2 3 4 5 3 4 5 4 5 5 int format(String s) - To calculate and return the sum of ASCII codes of each character of the String. Example: CAB Output: 67 + 65 + 66 = 198 void format(int n) - To calculate and display the sum of natural numbers up to n given by the formula n(n + 1) / 2.

Choose the correct answers to the questions from the given options. (Do not copy the questions, write only the correct answers.)

1(xv)2025

MCQModerate1 mark

Which of the following pairs of methods will cause a compile-time error due to incorrect method overloading?

(a)void test(int a, int b) and void test(double a, double b)
(b)void test(int a, double b) and void test(double a, int b)
(c)void test(int a, double b) and void test(int a)
(d)void test(int a) and int test(int a)

1(xx)2025

MCQModerate1 mark

Consider the following program segment in which the statements are jumbled. Choose the correct order of statements to calculate and return the factorial of 4. 1. for(k = 1; k <= 4; k++) 2. return fa; 3. long fa = 1, k; 4. fa *= k;

(a)1, 2, 3, 4
(b)3, 1, 4, 2
(c)3, 1, 2, 4
(d)1, 3, 2, 4

2(vii)2025

ProgramModerate2 marks

John was asked to write a Java code to calculate the surface area of a cone. The following code was written by him: Surface area of cone is A = pi * r * l, where l = sqrt(r^2 + h^2) class area { double area(double r, double h) { double l, a; a = 22.0 / 7 * r * l; l = Math.sqrt(r * r + h * h); return a; } } Specify the type of the error in the above program, correct and write the program to be error free.

72025

ProgramHard15 marks

Define a class to overload the method print() as follows: void print() - To print the given format using nested loops. @#@#@ @#@#@ @#@#@ @#@#@ @#@#@ double print(double a, double b) - To display the sum of numbers between a and b with difference of 0.5. e.g. if a = 1.0, b = 4.0 output is: 1.0 + 1.5 + 2.0 + 2.5 + .......... + 4.0 int print(char ch1, char ch2) - compare the two characters and return the ASCII code of the largest character.

Choose the correct answers to the questions from the given options. (Do not copy the questions, write only the correct answers.)

1(xiv)2024

MCQModerate1 mark

Method which reverses a given number is __________:

(a)Impure method
(b)Pure method
(c)Constructor
(d)Destructor

1(xvi)2024

MCQModerate1 mark

Invoking a method by passing the objects of a class is termed as __________.

(a)Call by reference
(b)Call by value
(c)Call by method
(d)Call by constructor

42024

ProgramHard15 marks

Define a class to overload the method perform as follows: double perform(double r, double h) - to calculate and return the value of Curved surface area of cone, CSA = pi * r * l void perform(int r, int c) - Use NESTED FOR LOOP to generate the following format. For r = 4, c = 5 the output is: 12345 12345 12345 12345 void perform(int m, int n, char ch) - to print the quotient of the division of m and n if ch is Q, else print the remainder of the division of m and n if ch is R

Choose the correct answers to the questions from the given options. (Do not copy the questions, write only the correct answers.)

1(viii)2023

MCQEasy1 mark

Write a method prototype named check() which takes an integer argument and returns a char:

(a)char check()
(b)void check(int x)
(c)check(int x)
(d)char check(int x)

1(ix)2023

MCQEasy1 mark

The number of values that a method can return is:

(a)1
(b)2
(c)3
(d)4

1(xv)2023

MCQEasy1 mark

Missing a semicolon in a statement is what type of error?

(a)Logical
(b)Syntax
(c)Runtime
(d)No error

1(xvii)2023

MCQEasy1 mark

A method which does not modify the value of variables is termed as:

(a)Impure method
(b)Pure method
(c)Primitive method
(d)User defined method

52023

ProgramHard15 marks

Define a class to overload the function print as follows: void print() - to print the following format: 1 1 1 1 2 2 2 2 3 3 3 3 4 4 4 4 5 5 5 5 void print(int n) - To check whether the number is a lead number. A lead number is the one whose sum of even digits is equal to the sum of odd digits. e.g. 3669 odd digits sum = 3 + 9 = 12 even digits sum = 6 + 6 = 12 3669 is a lead number.

Choose the correct answer:

1(v)2021

MCQModerate1 mark

Name the type of error in the statement given below: double x; y; z;

(a)Logical error
(b)Syntax error
(c)Runtime error
(d)No error

Fill in the blanks with the correct options:

2(v)2021

MCQModerate1 mark

Parameters used in the method call statement are __________.

(a)Actual parameters
(b)Informal parameters
(c)Formal parameters
(d)Void parameters

Name the following:

3(ii)2021

MCQEasy1 mark

The keyword which indicates that the method returns no value:

(a)public
(b)static
(c)void
(d)abstract

A school is giving away merit certificates for the students who have scored 90 percentage and above in class 10. The following program is based on the specification given below. Fill in the blanks with appropriate Java statements. class name : Student Member variables: String name, double per, String cer Member methods: void input(), void merit(), void display(), void main() import java.(i) __________ .*; class Student { String name; double per; String cer; void input() { Scanner obj = new Scanner(System.in); System.out.println("Enter name, Percentage"); name = obj.next(); per = (ii) __________ } void merit() { if( (iii) __________ ) cer = "AWARDED"; else cer = (iv) __________ } void (v) __________ { System.out.println(name); System.out.println(per); System.out.println(cer); } void main() { Student s = new (vi) __________ s.input(); s.merit(); s.display(); } }

8(v)2021

MCQEasy1 mark

Fill in blank (v): void __________