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Test: Arrays - 1 - Software Development MCQ


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15 Questions MCQ Test Basics of Java - Test: Arrays - 1

Test: Arrays - 1 for Software Development 2024 is part of Basics of Java preparation. The Test: Arrays - 1 questions and answers have been prepared according to the Software Development exam syllabus.The Test: Arrays - 1 MCQs are made for Software Development 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Arrays - 1 below.
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Test: Arrays - 1 - Question 1

What is an array in Java?

Detailed Solution for Test: Arrays - 1 - Question 1

An array in Java is a container object that holds a fixed number of elements of the same type.

Test: Arrays - 1 - Question 2

Which of the following statements about arrays in Java is true?

Detailed Solution for Test: Arrays - 1 - Question 2

In Java, arrays have a fixed size that is determined at the time of declaration and cannot be changed.

Test: Arrays - 1 - Question 3

What is the index range of an array with size N in Java?

Detailed Solution for Test: Arrays - 1 - Question 3

The index range of an array with size N in Java is from 0 to N-1.

Test: Arrays - 1 - Question 4

How can you access an element in an array in Java?

Detailed Solution for Test: Arrays - 1 - Question 4

Array elements can be accessed using their index, which is a numeric value indicating the position of the element in the array.

Test: Arrays - 1 - Question 5

Which of the following statements about multidimensional arrays in Java is true?

Detailed Solution for Test: Arrays - 1 - Question 5

In Java, multidimensional arrays can have different lengths for each dimension, allowing you to create irregular or jagged arrays.

Test: Arrays - 1 - Question 6

What will be the output of the following code?
int[] numbers = {1, 2, 3, 4, 5};
System.out.println(numbers[3]);

Detailed Solution for Test: Arrays - 1 - Question 6

The code creates an array of integers and initializes it with values 1, 2, 3, 4, and 5. The line 'System.out.println(numbers[3]);' prints the value at index 3 of the array, which is 4.

Test: Arrays - 1 - Question 7

What will be the output of the following code?
int[] values = new int[5];
System.out.println(values[2]);

Detailed Solution for Test: Arrays - 1 - Question 7

The code creates an array of integers with a size of 5. Since the array is not explicitly initialized, the default value for integers (0) is assigned to each element. The line 'System.out.println(values[2]);' prints the value at index 2 of the array, which is 0.

Test: Arrays - 1 - Question 8

What will be the output of the following code?
int[] numbers = new int[3];
System.out.println(numbers.length);

Detailed Solution for Test: Arrays - 1 - Question 8

The code creates an array of integers with a size of 3 using the new keyword. The line 'System.out.println(numbers.length);' prints the length of the array, which is 3.

Test: Arrays - 1 - Question 9

What will be the output of the following code?
int[] numbers = {1, 2, 3, 4, 5};
System.out.println(numbers[numbers.length - 1]);

Detailed Solution for Test: Arrays - 1 - Question 9

The code creates an array of integers and initializes it with values 1, 2, 3, 4, and 5. The line 'System.out.println(numbers[numbers.length - 1]);' prints the value at the last index of the array, which is 5.

Test: Arrays - 1 - Question 10

What will be the output of the following code?
int[][] matrix = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9}};
System.out.println(matrix[1][2]);

Detailed Solution for Test: Arrays - 1 - Question 10

The code creates a 2-dimensional array called 'matrix' with three rows and three columns. The line 'System.out.println(matrix[1][2]);' accesses the element at the second row and third column of the array, which is 6.

Test: Arrays - 1 - Question 11

What will be the output of the following code?
int[] numbers = {1, 2, 3, 4, 5};
int sum = 0;
for (int i = 0; i < numbers.length; i++) {
    sum += numbers[i];
}
System.out.println(sum);

Detailed Solution for Test: Arrays - 1 - Question 11

The code calculates the sum of all the elements in the 'numbers' array using a loop. The sum starts with 0 and accumulates the values of each element in the array. The final sum is printed, which is 15.

Test: Arrays - 1 - Question 12

What will be the output of the following code?
int[] array = {1, 2, 3, 4, 5};
int max = array[0];
for (int i = 1; i < array.length; i++) {
    if (array[i] > max) {
        max = array[i];
    }
}
System.out.println(max);

Detailed Solution for Test: Arrays - 1 - Question 12

The code finds the maximum value in the 'array' by comparing each element with the current maximum. The variable 'max' is initialized with the first element of the array, and the loop iterates through the remaining elements, updating max if a larger value is found. The final maximum value is printed, which is 5.

Test: Arrays - 1 - Question 13

What will be the output of the following code?
int[] array = {5, 10, 15, 20};
int target = 15;
int index = -1;
for (int i = 0; i < array.length; i++) {
    if (array[i] == target) {
        index = i;
        break;
    }
}
System.out.println(index);

Detailed Solution for Test: Arrays - 1 - Question 13

The code searches for the index of the 'target' value in the 'array'. It starts with an initial index of -1 and iterates through the array, checking if each element is equal to the target value. If a match is found, the index is updated and the loop breaks. The final index is printed, which is 2.

Test: Arrays - 1 - Question 14

What will be the output of the following code?
int[] array = {1, 2, 3, 4, 5};
int target = 6;
boolean found = false;
for (int i = 0; i < array.length; i++) {
    if (array[i] == target) {
        found = true;
        break;
    }
}
System.out.println(found);

Detailed Solution for Test: Arrays - 1 - Question 14

The code checks if the 'target' value exists in the 'array' by iterating through each element and comparing it to the target. If a match is 'found', the variable found is set to true, and the loop breaks. If no match is found, 'found' remains false. The value of 'found' is printed, which is false.

Test: Arrays - 1 - Question 15

What will be the output of the following code?
int[] array = {2, 4, 6, 8, 10};
int target = 5;
int count = 0;
for (int i = 0; i < array.length; i++) {
    if (array[i] % 2 == 0) {
        count++;
    }
}
System.out.println(count);

Detailed Solution for Test: Arrays - 1 - Question 15

The code counts the number of even numbers in the 'array'. It initializes a counter variable 'count' with 0 and iterates through each element of the array. If an element is divisible by 2 (i.e., even), the counter is incremented. The final count is printed, which is 2.

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