FIFO and LIFO are commonly heard terms when discussing many different fields. It is also a popularly used method in computing and accounting. Meaning of this abbreviations are, respectively: first in, first out and last in, first out. LILO (Last In, Last Out) is synonymous with FIFO and FILO (First In, Last Out) is synonymous with LIFO.
Most viewed interview questions for software developer
Object composition in OOP refers to combining two or more different classes with purpose of creating new, more complex class. In case of composition, an object "owns" another object, rather than just use it, which means if main object will be destroyed, all internal objects should be destroyed as well. In case of aggregation, which is a closely related concept to composition, you can say an internal object is a part of the main object, but is still independent and can exists on its own.
Object-oriented programming or OOP is programming model based on the concepts of "objects", which are data structures that contain data, in the form of fields, and code, in the form of methods. In addition, programmers can create relationships between objects. For example, objects can inherit data and methods from other objects. Program, designed with OOP approach, is maked of objects that interact with one another. Most popular languages have class-based OOP, meaning that objects are instances of classes, which typically also determines their type.
HTML5 is a markup language used for structuring and presenting content on the World Wide Web. It is the fifth and current version of the HTML standard.
It was published in October 2014 by the World Wide Web Consortium (W3C) to improve the language with support for the latest multimedia, while keeping it easily readable by humans—and consistently understood by computers and devices such as web browsers, parsers, etc. HTML5 is intended to subsume not only HTML 4, but also XHTML 1.
null is also considered an object!
Prototype-based programming is a style of object-oriented programming in which inheritance is implemented via process of cloning existing objects that serve as prototypes. Read more about prototype-based OOP here. In prototype-based languages objects inherit directly from other objects, in more classical class-based OOP languages inheritance is based around "parent-child" relationship between classes.
In computer science, data structures are abstract structures organized in particular way that are used to organize data and provide various operations upon it. Different kinds of data structures are suited to different kinds of applications, and some are highly specialized to specific tasks.
SQL is Structured Query Language used for relational database management. Originally based upon relational algebra and tuple relational calculus, SQL consists of a data definition language, data manipulation language, and a data control language. Read basic definition of SQL here.