15 Best Memcached Interview Questions and Answers

15 Best Memcached Interview Questions and Answers - Caching Data

What Is Memcached?

Memcached is very popular in-memory caching software.

Memcached is an open-source, free, high-performance, distributed memory object that speeds-up data-driven websites by caching data and objects in RAM.

Memcached was first developed by Brad Fitzpatrick for his website LiveJournal, on May 22, 2003.

Memcached is a component which stores data temporally for 1hour, 6hour, 12hours, 1day etc.

Memcached is used by Wikipedia, Twitter, Facebook, Flickr, Netlog, YouTube, etc.

Who Is the Author of Memcached?

The Author of Memcached is - Danga Interactive.

In which Language Memcached Is Written?

Memcached is written in C language. It was written by Danga Interactive.

When Memcached's Initial Version Launched?

The initial version of Memcached was launched in - May 22, 2003.

What Is Official website of Nginx?

http://www.memcached.org/

What Is the best use of Memcached?

The Best use of Memcached:-

1. Easy to install

2. Improve the performance of web application by caching

3. Memcached offers API integration for all the major languages like Java, PHP, C, C++, Python, Ruby, Perl etc.

4. Reduced the burden of a database server

5. We can update the values of keys

6. We can use Tags for keys

What Are the limitations of Memcached?

1. Memcached is not a database

2. Memcached stores temporary data and permanently

3. Memcached can’t cache large objects

Which Memcached Command is used to get the Version?

Version

Which Memcached Command is used to add the value of key?

Syntax - add [key] [flags] [exptim] [bytes] [noreply]

Example - add key 0 900 4

Which Memcached Command is used to get the value of key?

get key

Which Memcached Command is used to set the value of Key?

Syntax - set [key] [flags] [exptim] [bytes] [noreply]

Example - set key 0 900 4

Which Memcached Command is used to show the Stats?

stats

Which Memcached Command is used to delete the Key?

delete key

Which Memcached Command is used to close the connection?

quit

How would you update Memcached when data changes?

1. By clearing the cache proactively

2. By resetting the cache

What conditions cache can’t retain the stored information?

When memory gets allocated for the cache is exhausted:-

1. When an item from cache gets deleted

2. When an individual item in the cache gets expired

By Anil Singh | Rating of this article (*****)

List of Countries, Nationalities and their Code In Excel File

Download JSON file for this List - Click on JSON file Countries List, Nationalities and Code Excel ID Country Country Code Nationality Person 1 UNITED KINGDOM GB British a Briton 2 ARGENTINA AR Argentinian an Argentinian 3 AUSTRALIA AU Australian an Australian 4 BAHAMAS BS Bahamian a Bahamian 5 BELGIUM BE Belgian a Belgian 6 BRAZIL BR Brazilian a Brazilian 7 CANADA CA Canadian a Canadian 8 CHINA CN Chinese a Chinese 9 COLOMBIA CO Colombian a Colombian 10 CUBA CU Cuban a Cuban 11 DOMINICAN REPUBLIC DO Dominican a Dominican 12 ECUADOR EC Ecuadorean an Ecuadorean 13 EL SALVA...

39 Best Object Oriented JavaScript Interview Questions and Answers

Most Popular 37 Key Questions for JavaScript Interviews. What is Object in JavaScript? What is the Prototype object in JavaScript and how it is used? What is "this"? What is its value? Explain why "self" is needed instead of "this". What is a Closure and why are they so useful to us? Explain how to write class methods vs. instance methods. Can you explain the difference between == and ===? Can you explain the difference between call and apply? Explain why Asynchronous code is important in JavaScript? Can you please tell me a story about JavaScript performance problems? Tell me your JavaScript Naming Convention? How do you define a class and its constructor? What is Hoisted in JavaScript? What is function overloadin...

React Lifecycle Components | Mounting, Updating, Unmounting

In React, each component has a life-cycle which manipulate during its three main phases. The following three phases are: 1. Mounting 2. Updating 3. Unmounting React does so by “ Mounting ” (adding nodes to the DOM), “ Unmounting ” (removing them from the DOM), and “ Updating ” (making changes to nodes already in the DOM). Mounting - Lifecycle Phase 1 Mounting is used for adding nodes (elements) to the DOM. The React has four built-in methods that gets called, in this order, when mounting a component - 1. constructor() 2. getDerivedStateFromProps() 3. render() 4. componentDidMount() Note – 1) The render() method is required and It always be called and the others methods are optional (you will call...

Top 50 C# OOPS Interview Questions and Answers | Freshers and Experience

List of 50 C# Object-Oriented Programming (OOP) interview questions along with brief answers. What is Object-Oriented Programming (OOP)? Answer : OOP is a programming paradigm that uses objects and classes for organizing code. It revolves around the concepts of encapsulation, inheritance, and polymorphism. Define encapsulation? Answer : Encapsulation is the bundling of data and the methods that operate on that data into a single unit, known as a class. What is a class in C#? Answer : A class is a blueprint or a template for creating objects. It defines the data and behavior that the objects of the class will have. Explain inheritance in C#. Answer : Inheritance is a mechanism by which a class can inherit the properties and behaviors of another class. It promotes code reuse and establishes a relationship between the parent (base) class and the child (derived) class. How is polymorphism achieved in C#? Answer : Polymorphism is achieved through ...

The Concepts Of Design Pattern - Questions and Answers

This article helps you to learn about design patterns and uses of them. I have tried to easily explain the problem statement where you can use these design patterns. I have cover all below topics to understand the c oncepts of Design Pattern. Table of Contexts - 1. What is Design Pattern? 2. Why should you use Design Patterns? 3. What are the Advantages of Design Patterns? 4. What are the Disadvantages of Design Patterns? 5. What about Anti-patterns? 6. Are Design Patterns the same thing as Frameworks? 7. What are the Gang of Four (GoF) Design Patterns? 8. Which Pattern is the Foundation of Design Pattern? 9. What are the types of Design Patterns? 10. What is C...

Anil Singh | Code-sample.com

Search This Blog