Arrays

Appeared in 10 of the 11 available papers.

Examined in

10 of 11 papers

Appears almost every year — treat as core

Typically worth

30.2 marks

Average per paper it appears in · 302 marks in total

Usual form

Program

54% of this chapter's 39 questions

Needs a diagram

10%

4 questions carry a figure — practise drawing them

Question-type distribution

Program21
MCQ8
Output5
Short answer3
Difference2

Most frequent topics

Memory occupied by a 2-D array 3Array of Strings 3Indices in a two-dimensional array 2Array length and elements 2Sorting techniques 1Swapping without a third variable 1Single dimensional String array — counting matches 1Two-dimensional array — Sparse Matrix 1

Print:Questions only Questions + answers Answers only

Print chapter question bank

Showing 25 of 39 matching questions (302 marks).

25 questions

1

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

1(xvii)2026

MCQModerate1 mark

An array with 3 elements is arranged in ascending order as follows: 4 1 3 -> 1 4 3 -> 1 3 4 Name the technique used:

(a)Bubble sort
(b)Linear Search
(c)Selection sort
(d)Binary Search

1(xviii)2026

MCQModerate1 mark

The sales made by 5 salesmen selling 5 products is stored in a two-dimensional array of integer data type. How many bytes does the array occupy?

(a)25
(b)200
(c)50
(d)100

2(viii)2026

Short answerModerate2 marks

int X[][] = {{4, 5}, {7, 2}, {19, 4}, {7, 4}}; Write the index of the maximum element and the index of the minimum element of the array.

2(ix)2026

ProgramHard2 marks

The following program segment swaps the first element and the second element of the given array without using the third variable. Fill in the blanks with appropriate java statements: void swap() { int x[] = {4, 8, 19, 24, 15}; (1) __________; (2) __________; x[0] = x[0] / x[1]; System.out.println(x[0] + " " + x[1]); }

Figure for this question

ProgramHard15 marks

Write a program to accept the designations of 100 employees in a single dimensional array. Accept the designation from the user and print the total number of employees with the designation given by the user as input. Example: Trainee | Manager | Chef | Manager | Director | Manager Input: Manager Output: 3

Figure for this question

ProgramHard15 marks

Write a program to accept a two-dimensional integer array of order 4 x 5 as input from the user. Check if it is a Sparse Matrix or not. A matrix is considered to be sparse if the total number of zero elements is greater than the total number of non-zero elements. Print appropriate messages. Example: 4 3 0 1 0 1 0 0 2 0 1 0 1 0 0 0 3 2 0 0 Number of zero elements = 11 Number of non zero elements = 9 Matrix is a Sparse Matrix

1

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

1(iii)2025

MCQEasy1 mark

double x[] = {2.5, 4.5, 5.5, 6.4}; occupies __________ bytes.

(a)16
(b)4
(c)8
(d)32

1(v)2025

MCQEasy1 mark

Consider the two-dimensional array P[2][3] of peripherals (input / output devices) given above; state the index of the device Barcode Scanner.

(a)P[1][1]
(b)P[0][1]
(c)P[1][2]
(d)P[0][0]

Diagram for question 1(v)

1(xiii)2025

MCQModerate1 mark

The index (subscript) of the last element of an array ar[] is

(a)ar.length()
(b)ar[].length
(c)ar.length()-1
(d)ar.length-1

2(viii)2025

OutputEasy2 marks

Consider the following array and answer the questions given below: int a[] = {12, 10, 8, 4, 6, 2, 3, 5, 7}; (a) What is the output of System.out.print(a[0] + a[5]);? (b) What is the index (subscript) of the largest element of the array a[]?

2(ix)2025

ProgramModerate2 marks

(a) Write the Java statement to initialise the first 6 odd numbers in a 3 x 2 array. (b) What is the result of x[0][1] + x[2][1] of the above array?

Figure for this question

ProgramHard15 marks

Define a class to accept values into a 4 x 4 integer array. Calculate and print the NORM of the array. NORM is the square root of sum of squares of all elements. 1 2 1 3 5 2 1 6 3 6 1 2 3 4 6 3 Sum of squares of elements = 1 + 4 + 1 + 9 + 25 + 4 + 1 + 36 + 9 + 36 + 1 + 4 + 9 + 16 + 36 + 9 = 201 NORM = square root of 201 = 14.177446878757825

ProgramHard15 marks

Define a class to initialise the following data in an array. Search for a given character input by the user, using the Binary Search technique. Print "Search Successful" if the character is found, otherwise print "Search is not Successful". 'A', 'H', 'N', 'P', 'S', 'U', 'W', 'Y', 'Z', 'b', 'd'

1

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

1(xi)2024

MCQModerate1 mark

The number of bytes occupied by a character array of four rows and three columns is __________.

(a)12
(b)24
(c)96
(d)48

1(xix)2024

MCQModerate1 mark

What is the output of the Java code given below? String color[] = {"Blue", "Red", "Violet"}; System.out.println(color[2].length());

(a)6
(b)5
(c)3
(d)2

2(vi)2024

Short answerModerate2 marks

Consider the following two-dimensional array and answer the questions given below: int x[][] = {{4, 3, 2}, {7, 8, 2}, {8, 3, 10}, {1, 2, 9}}; (a) What is the order of the array? (b) What is the value of x[0][0] + x[2][2]?

ProgramHard15 marks

Define a class to accept values into an integer array of order 4 x 4 and check whether it is a DIAGONAL array or not. An array is DIAGONAL if the sum of the left diagonal elements equals the sum of the right diagonal elements. Print the appropriate message. Example: 3 4 2 5 Sum of the left diagonal elements = 3 + 5 + 2 + 1 = 11 2 5 2 3 Sum of the right diagonal elements = 5 + 2 + 3 + 1 = 11 5 3 2 7 1 3 7 1

ProgramHard15 marks

Define a class pin code and store the given pin codes in a single-dimensional array. Sort these pin codes in ascending order using the Selection Sort technique only. Display the sorted array. 110061, 110001, 110029, 110023, 110055, 110006, 110019, 110033

2(viii)2023

Short answerEasy2 marks

Consider the given array and answer the questions given below: int x[] = {4, 7, 9, 66, 72, 0, 16}; (a) What is the length of the array? (b) What is the value in x[4]?

ProgramHard15 marks

Define a class to accept 10 characters from a user. Using bubble sort technique arrange them in ascending order. Display the sorted array and original array.

ProgramHard15 marks

Define a class to accept values into an array of double data type of size 20. Accept a double value from the user and search in the array using the linear search method. If the value is found display the message "Found" with its position where it is present in the array. Otherwise display the message "not found".

ProgramHard15 marks

Define a class to accept values in an integer array of size 10. Find the sum of one digit numbers and the sum of two digit numbers entered. Display them separately. Example: Input: a[] = {2, 12, 4, 9, 18, 25, 3, 32, 20, 1} Output: Sum of one digit numbers : 2 + 4 + 9 + 3 + 1 = 19 Sum of two digit numbers : 12 + 18 + 25 + 32 + 20 = 107

1

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

1(vii)2022

MCQEasy1 mark

A single dimensional array contains N elements. What will be the last subscript?

(a)N
(b)N-1
(c)N-2
(d)N+1

ProgramHard10 marks

Define a class to perform binary search on a list of integers given below, to search for an element input by the user. If it is found, display the element along with its position, otherwise display the message "Search element not found". 2, 5, 7, 10, 15, 20, 29, 30, 46, 50

ProgramHard10 marks

Define a class to declare a character array of size ten, accept the characters into the array and display the characters with the highest and lowest ASCII (American Standard Code for Information Interchange) value. EXAMPLE: INPUT: 'R', 'z', 'q', 'A', 'N', 'p', 'm', 'U', 'Q', 'F' OUTPUT: Character with highest ASCII value = z Character with lowest ASCII value = A