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Q2571. Can we change the size of array once created ?

Core Java

Ans. No. Arrays cannot resize dynamically.

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Q2572. Can we use generics with arrays in Java ?

Core Java

Ans. No

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Q2573. What is the difference between ArrayIndexOutOfBoundException and ArrayStoreException?

Core Java

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Q2574. What is ArrayStoreException ?

Core Java

Ans. It's an exception that is thrown when we attempt to add value of an incompatible type to an array.

For example -

Object[] strArray = new String[2];
strArray[0] = 5;

In this code, strArray reference of type Object has currently been assigned the String array but at line 2 we are trying to add an integer value.

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Q2575. What is an anonymous array in Java ?

Core Java

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Q2576. Can you write code to copy one array into another ?

Data Structure

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Q2577. What are jagged arrays ?

Core Java

Ans. an array of different sizes

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Q2578. Where are arrays stored in memory - stack or heap ?

Core Java

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Q2579. Are Arrays treated like primitives or like objects in Java ?

Core Java

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Q2580. How can we check equality for Arrays in Java ?

Core Java

Ans. You call the method java.util.Arrays.equals(Object[] a, Object[] a2)?

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Q2581. Are arrays Thread Safe ?

Core Java

Ans. Yes

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Q2582. What is the time and space complexity for different operations for arrays ?

Core Java

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Q2583. Difference between Arrays and LinkedList ?

Data Structure

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Q2584. What is the ideal situation / case for using heap sort ?

Algorithm

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Q2585. In an array every element is repeated twice except one, Find that element?

Data Structure

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Q2586. Given a max-heap represented as an array, Return the n th largest element without modifying the heap.

Algorithm

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Q2587. Write code to serialize and deserialize an array of strings ?

Core Java

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Q2588. Find number of recycled pairs in n array.

Data Structure

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Q2589. Given an array, find the minimum inverting factor.

Design

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Q2590. Find the length of the non repeated numbers in an array.

Data Structure

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Q2591. Can we have 3 dimensional arrays in Java ?

Core Java

Ans. Yes

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Q2592. Can we make array volatile in Java ?

Core Java

Ans. Yes, you can make an array (both primitive and reference type array e.g. an int array and String array) volatile in Java but only changes to reference pointing to an array will be visible to all threads, not the whole array

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Q2593. Write a program to insert a value after a specific value in an array.

Data Structure

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Q2594. How do you implement 'state and behavior' of object in Java program?

Core Java

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Q2595. How is it possible to use concat on string objects in Java, based on the fact that string is immutable?

Core Java

Ans. It's possible because internally java first reserves the memory for the new concatenated string and then copy that over. So after concatenation, there are 2 strings in memory, the original one and the concatenated one and then the reference is moved to the concatenated string.

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Q2596. Difference between static and dynamic memory allocation ?

Core Java

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Q2597. Why Arrays are considered as data structures whereas ArrayList isn't ?

Core Java

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Q2598. Are Arrays a data structure or a collection class ?

Core Java

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Q2599. How can multi threading lead to a deadlock ?

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Q2600. Which Java version supports Interface Default methods ?

Core Java

Ans. Java 1.8 or Java 8

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