In Java we can use a Comparable or Comparator interface to sort a collection. Both interfaces have some differences you should know in order for you to make the right decision. Comparable Interface We can only sort the collection by a single member of an element. Comparable affects the current object being sorted. Override compareTo() …
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Map Interface What is a map in java? In java map is an interface that extends the collection interface. A map structures its elements in a unique key value pair by using a hash table data structure. A map is unordered by default. Map can be implemented by TreeMap, HashMap, and LinkedHashMap classes. HashTable A …
Set Interface What is a set in java? Well a set is an interface that extends the collection interface. A set structure, represents an unordered set of elements that only allows unique elements, no duplicates and at most one null element. In ordered to create a set collection we have to implement the set interface. …
What is a list in java? Well, a list is an interface that extends the collection interface. A list structure’s our elements in insertion. A list alone is not enough to create a collection. We have to implement this collection interface, there are 3 different classes the implement list, ArrayList, LinkedList, and Vector. ArrayList The …
Q1: What is a collection? A java collection is a container that holds objects in a certain structure, is an implementation of a data structure. Many operations can be perform on the data such. Q: What operations can be perform on a collection? All operations, sorting, insertion, manipulation and deletion. Q: What are the benefits …
Q1: List some of the advantages of JavaScript Server interaction is less Feedback to the visitors is immediate Interactivity is high Interfaces are richer Q2: List some of the disadvantages of JavaScript. No support for multithreading No support for multiprocessing Reading and writing of files is not allowed No support for networking applications. Q3: Is …
Q1: What is CSS? Cascading Style Sheets is a web defining language for html elements and is also known as XHTML. It is used to style html pages and allows to have all styling separate from html file. Q2: What are the 3 ways CSS can be integrated in HTML? Inline– using the style attribute …
Q1: What is HTML? Hyper Text Markup Language is the language of the web. It is the standard formatting text and is used to create organize webpages, by allowing text to turn into images, tables and links. Q2: What are tags? Tags are used in html to format content, and it is wrapped in angle …
The Adapter pattern is a structural pattern that allows two objects with incompatible interfaces to interact. Adapter pattern is also known as a wrapper. UML Diagram Example RoundHole that has a function called fits() that takes in a RoundPeg object and returns if it fits. We also have a SquarePeg class that creates incompatible objects, …
The singleton design pattern is one of a kind, The singleton is a creational pattern that makes sure you only have one instance of a class, while providing global access to this object. Requirements: Must use a private constructor preventing new instantiations of this class a static method that acts like a constructor, “getInstance()” that …
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