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What is meant by the term array?
Arrays are objects in Java that store multiple variables of the same type. Arrays can hold either primitives or object references, but the array itself will always be an object on the heap, even if the array is declared to hold primitive elements. In other words, there is no such thing as a primitive array, but you can make an array of primitives. Arrays are declared by stating the type of element the array will hold, which can be an object or a primitive, followed by square brackets to the left or right of the identifier. Declaring an array of primitives: int[] Values; // brackets before name (recommended) int Values []; // brackets after name (legal but less readable) // spaces between the name and [] legal, but bad Declaring an array of object references: Ferrari[] Ferraris; // Recommended Ferrari Ferraris[]; // Legal but less readable When declaring an array reference, you should always put the array brackets immediately after the declared type, rather than after the identifier (variable name). That way, anyone reading the code can easily tell that, for example, Values is a reference to an int array object, and not an int primitive.
Is it necessary to specify dimension while declaring an array?
yes
What is the difference between numeric array and associative array?
Numeric array has numbers(+integers) that represent the values Associative array has strings that represent the values
How do you accept an array in java?
Arrays are objects in Java that store multiple variables of the same type. Arrays can hold either primitives or object references, but the array itself will always be an object on the heap, even if the array is declared to hold primitive elements. In other words, there is no such thing as a primitive array, but you can make an array of primitives. Arrays are declared by stating the type of element the array will hold, which can be an object or a primitive, followed by square brackets to the left or right of the identifier. Declaring an array of primitives: int[] Values; // brackets before name (recommended) int Values []; // brackets after name (legal but less readable)
How can I double the size of an array efficiently?
To double the size of an array efficiently, you can create a new array with double the capacity, copy the elements from the original array to the new array, and then update the reference to the original array to point to the new array. This process ensures that the array is resized without having to individually resize each element.
Write a program that randomly fills a 10 component array then prints the largest and smallest values in the array?
final double[] ns = new double[10]; final Random rnd = new Random(System.currentTimeMillis()); // Fill... for (int i = 0; i < ns.length; ++i) { ns[i] = rnd.nextDouble(); } // Get largest/smallest... double largest = Double.MIN_VALUE; double smallest = Double.MAX_VALUE; for (double n : ns) { if (n > largest) { largest = n; } if (n < smallest) { smallest = n; } } // largest and smallest are now the proper values.
Can an array be a single column of values?
Yes.
What is the correct syntax for declaring and initializing an array that contains the numbers 0-9?
int x[]={0,1,2,3,4,5,6,7,8,9};
Differentiate single dimensional array to double dimensional array?
A single dimensional array is an array of items. A two-dimensional array is an array of arrays of items.
How do i write a program in c langua ge for the implementation of binary search with output?
There are various ways to implement a binary search, but the simplest makes use of a sorted array. It must be sorted because we need to know where values are in relation to one another. That is, if we know that element X has the value Y, then all values less than Y must be in the first half of the array, and all values greater than Y must be in the second half of the array. We begin by looking at the middle element of the array. If there is no middle element (the array is empty) then the value does not exist. But if the middle value holds the value we are looking for, we are done. Otherwise we compare values to decide which half of the array can be eliminated. We then repeat the process with the remaining half of the array.
How do you display 15 numbers in an ascending order using an array?
Sort the array then traverse the array, printing the element values as you go.
How do you find the quartile in an even array of values?
Divide the array in half and get the median of each half
