object oriented programming interview questions

1. Indirect (indirection)1.1 Variables and indirection (use variables to replace some numbers)1.2 Indirect use of file namesconst indicates that a variable is not allowed to be changedconst int Nvalue;//nvalue is constconst char *pcontent; *pcontent is const, pcontent variableconst char* Const pcontent; Pcontent and *pcontent are both const.Strlen (String value); Returns the length of the value stringAs the following example, can be written by non-professional files, which is indirect, but the p

Chapter 2 C ++ object-orientedProgramDesign method OverviewEncapsulation, inheritance, combination, virtual functions, abstract base classes, dynamic binding, and polymorphism are important concepts in object-oriented programming.12.1 introduction to object-oriented12.2

in the prototype are shared by many instances, which is not optimistic for attributes that contain reference types.6.3.1 prototype chainThe prototype chain implements the principle of inheritance: Use a prototype to have one reference type inherit the properties and methods of another reference type. Review the relationship of a constructor, prototype, and instance: each constructor has a prototype object, and the prototype

(text) {return This.indexof (text) = = 0}var msg = "Hello World" msg.startwith ("Hell O "); constructor mode is used to define instance properties, while prototype mode is used to define methods and shared properties function person (name, age, Job) { this.name = name; nbs P This.age = Age; this.job = job;} Person Protytype = { constructor:person, sayname:function () { a Lert (this.name); }} Dynamic Prototyping Mode function p

equal.If the comparison function is not passed in, it will turn the values all into strings and order alphabetically.9. Flip an array: You can use reverse methods to flip an array. This function is not required, the callback function is used directly. NewArray = Array.reverse ();10. Merging arrays: concat methods can be used to merge the contents of two arrays into an arrayconcatThe parameter of the method should be an array. The array in the parameter is stitched to the back of the original ar

Original article: http://www.altdevblogaday.com/2012/04/26/functional-programming-in-c/ Author: John Carmack -Pan Hong -March January 2013 -Email:Popyy@netease.com -Weibo.com/panhong101 Michael feathers @ mfeathersObject-oriented code can be understood by encapsulating the activity part. Function programming minimizes the amount of activity to make code unders

synchronization (thread-safe) when two or more processes concurrently manipulate the same resource, only one thread is allowed to access at the same time, and other threads wait.14, the keyword synchronized synchronization, can be used as a modifier of the method, indicating that when a thread is accessing the resource, other processes can only wait. When the thread ends access to the resource, other threads are allowed access.15, the result of synchronization: Data security, low efficiency.16,

Link to the PHP object-oriented programming getting started tutorial, and the OOP Getting Started Tutorial. Link to the PHP object-oriented programming getting started tutorial, the OOP Getting Started Tutorial PHP official learni

Single duty principle srp:single responsibility PrincipleOpen Closure Principle ocp:open-close principleLiskov substitution principle Lsp:liskov substitution principleDependency Inversion principle dip:dependency invertion principleInterface Isolation principle Isp:interface separate principleIn object-oriented design, how to deal with the change of design demand through small design change, this is the pro

: Note The Serialversionuid inconsistency throws a serialized run-time exception.11. The "forced" construction method prohibits any business logic from being added, and if there is initialization logic, put it in the Init method.12. The "force" Pojo class must write the ToString method. When using the IDE's tools:source> generate ToString, if you inherit another Pojo class, be careful to add super.tostring to the front. Description: When the method execution throws an exception, you can directly

Throw Overflow (); 22 23 V [Top] = C; 24 Top ++ ; 25 } 26 27 STACK: Pop () 28 { 29 If (Top = 0 ) 30 Throw Underflow (); 31 Top -- ; 32 Return V [Top]; 33 } From the above, we can see how to define a class. This is just a type of stack. Different types of stacks may have different implementation methods of push and pop, in this way, we can use the object-oriented