Question

What is the central concept of JavaScript memory management? (a) Reliability (b) Reachability (c) Efficiency (d) Transparency The question was asked in final exam. This is a very interesting question from JavaScript and Memory Leak in chapter Caching, Debugging and Animation of JavaScript Select the correct answer from above options JavaScript questions and answers, JavaScript questions pdf, JavaScript question bank, JavaScript questions and answers pdf, mcq on JavaScript pdf, JavaScript questions and solutions, JavaScript mcq Test , Interview JavaScript questions, JavaScript Questions for Interview, JavaScript MCQ (Multiple Choice Questions)

Answer 1

Right choice is (b) Reachability The explanation: The central concept of JavaScript memory management is a concept of reachability. The main cause for leaks in garbage collected languages are unwanted references. A distinguished set of objects are assumed to be reachable: these are known as the roots. Typically, these include all the objects referenced from anywhere in the call stack (that is, all local variables and parameters in the functions currently being invoked), and any global variables. Objects are kept in memory while they are accessible from roots through a reference or a chain of references.