Ruby Interview Questions and Answers

Programming Ruby is known to Rubyists. It is a tutorial and reference for the Ruby programming language. Before we start talking about the Ruby language, it’d be useful if we helped you get Ruby running on your computer. That way you can try sample code and experiment on your own as you read along. We’ll also show you some different ways to run Ruby.Below is the list of latest and updated Ruby interview questions and answers for beginners as well as experienced users.

Best Ruby Interview Questions and Answers

A binary distribution of Ruby simply works out of the box. You install it, and it runs. Binary distributions are prebuilt for a particular operating environment and are convenient if you don’t want to mess around with building Ruby from source. The downside of a binary distribution is that you have to take it as given: it may be a minor release or two behind the leading edge, and it may not have the optional libraries that you might want. Below list of Ruby Interview Questions will help to understand the Ruby beginners before attend the interview.

Explain about interpolation?

Interpolation is a very important process in Ruby. Interpolation is the process of inserting a string into a literal. There is only one way in which you can interpolate a string into a literal by placing a Hash (#) within {} open and close brackets. This refers to a new name to by referring to the copy of the original method.

How does ruby deal with extremely large numbers?

Unlike other programming languages ruby deals with extremely large numbers it doesn’t have any barriers. There is no limit on the extent of limit of number usage. Ruby performs this function with two different classes they are fixnum and bignum. Fixnum represents easily managed small numbers and bignum represents big numbers. Ruby entirely handles the functioning of these two classes which leaves a programmer to concentrate on his arithmetic operations.

Explain about ruby code blocks?

Ruby code blocks form an important part of ruby and are very fun to use. With the help of this feature you can place your code between do-end and you can associate them with method invocations and you can get an impression that they are like parameters. They may appear near to a source of the code and adjacent to a method call.

Explain about Class variable and global variable?

A class variable starts with an @@ sign which is immediately followed by upper or lower case letter. You can also put some name characters after the letters which stand to be a pure optional. A class variable can be shared among all the objects of a class. A single copy of a class variable exists for each and every given class.

Explain about ruby names?

Classes, variables, methods, constants and modules can be referred by ruby names. When you want to distinguish between various names you can specify that by the first character of the name. Some of the names are used as reserve words which should not be used for any other purpose. A name can be lowercase letter, upper case letter, number, or an underscore, make sure that you follow the name by name characters.

Explain about normal method class?

This function calls a method and it can take any number of arguments and expr. Make sure that you put an asterisk or an ampersand before the expression. Last expr argument can be declared with a hash without any braces. If you want to increase the size of the array value then make sure that you put an asterisk before expression. “::” can be used to separate the class from methods.

Explain about methods?

Methods in ruby basically perform two functions, named operation and the code present in the class which does a specific function. In Ruby all your algorithms live in methods which inturn is present on objects. Ruby does not have any provision for functions. Code present in Ruby is always a method of some object. Behind the scenes ruby gives you the flexibility to work with methods as functions if you are considering working with other languages.

Explain about the defined operator?

Define operator defines whether a passed expression is defined or not. If the expression is defined it returns the description string or null if the expression is not defined. If a variable is defined it gets initialized. If method_call is defined as true then method also gets defined. This is also the same case with super and yield.

Explain about operators in Ruby?

Like all the modern languages Ruby supports many different operators to its credit. Most of the operators in Ruby are in fact methods due to the object oriented nature of the language. This feature gives Ruby an edge over its competitors. Semantics of these operators can be changed due to the object oriented nature of the language.

Explain about the command line options?

Ruby’s language is executed from the command line like most of the scripting languages. Programming and behavior language environment can be controlled from the interpreter itself Some of the commands which are used are as follows —d, -h, -e prog, -v, -T, -r lib, etc.

Explain about garbage collection feature of ruby?

Ruby is an object oriented language and every object oriented language tends to allocate many objects during execution of the program. Ruby deletes unallocated and unused objects automatically. This feature can be controlled by applying proper syntax and program through ruby.

Explain about portability?

Ruby language can be ported to many platforms. Ruby programs can be ported to many platforms without any modification to the source code. This feature made the language very useful and highly used by many programmers worldwide. Some of the platforms used are DOS, UNIX, WINDOWS, etc.

Explain about class libraries in ruby?

Ruby has a strong set of class libraries and it covers from a variety of domains such as thread programming, domains and data types. Also ruby is a new language and it also has additional libraries coming every day. Many of the new languages which do exist have huge libraries because of their age.

Explain about the programming language ruby?

Ruby is the brain child of a Japanese programmer Matz. He created Ruby. It is a cross platform object oriented language. It helps you in knowing what your code does in your application. With legacy code it gives you the power of administration and organization tasks. Being open source, it did go into great lengths of development.

Once that Ruby is installed, you’d probably like to run some programs. Unlike compiled languages, you have two ways to run Ruby—you can type in code interactively, or you can create program files and run them. Typing in code interactively is a great way to experiment with the language, but for code that’s more complex, or that you will want to run more than once, you’ll need to create program files and run them.

Thus, the compilation of these questions includes some of the major points that can be asked during an interview. The Ruby interviewers generally check the base knowledge of a candidate, which can be gained by practicing these questions prior interview.

So if you have finally found your dream job in Ruby but are wondering how to crack the Ruby Interview and what could be the probable Ruby Interview Questions. Every interview is different and the scope of a job is different too. Hope above assist you to get a dream Job. Keep Learn.