Don't Stop Learning : 2017

Tuesday, 7 November 2017

Big Data Hadoop - An Infographics

Big Data Hadoop

Friday, 15 September 2017

Top 10 Best Resume Templates - Free Download

Start to think of your resume as a selling tool, a tool that sells you, your work history, and your skills to potential employers. For those early in their professional career, resumes are relatively straightforward, while resumes for mid-career or late-career professionals are a bit more challenging.

And, if you are looking to change careers or industries, the challenge is even greater.

So, let’s start with defining the basics, and outlining who they are best for.

Chronological Resume Format
Functional Resume Format
Combination Resume Format
Two-page Resume
Creative Resume
Modern Resume
Clean Resume
Infographic Resume
Simple Resume

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Chronological Resume Format

Undoubtedly the most common resume, and probably the one most often typed on a typewriter decades ago, the chronological resume lists every job you’ve had, starting with the most recent.

Chronological resumes are best for:

Recent graduates with experience in the field through paid jobs, or internships
Mid-career professional with an extensive employment history
People with a work history that shows progress and forward movement along a relatively narrow career path
Individuals with nationally/internationally recognized companies
Military members looking to transition into civilian positions with similar job functions and responsibilities
Individuals working with an executive recruiter

Download: Chronological Resume Template

Functional Resume

Over the last decade, functional resumes have become more popular because they focus on highlighting one’s abilities and achievements, instead of work history. While some hiring managers and executive recruiters will prefer a chronological resume, more and more are beginning to appreciate the clarity gained from a functional resume.

Who do functional resumes work best for:

Individuals with significant gaps in work history
Those needing to emphasize skills over job titles or companies worked for
Job seekers who frequently change jobs
Persons who are re-entering the workforce
People seeking to transition into a new career

Download: Functional Resume Template

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Combination Resume

Combining the best elements of the chronological and the functional resumes, the Steely resume template lends an air of authority while highlighting a balance of accomplishments, work history, and education.

Recruiters and hiring managers will appreciate how easy this template is on their eyes. This distinctive resume template is a great choice for financial professionals, hospital administrators, and those in the legal field.

Download: Combination Resume Template

Two Page Resume

The Button-Down two-page resume template is an update on a classic resume as it includes clean lines and bullet points to highlight your skills and experience. Mid-career and above professionals seeking executive management positions will find that it provides ample space to detail their work history, skills, accomplishments, and education.

Download: Two Page Resume Template

Creative Resume

When personal computing was still fairly new, many people went overboard when designing and formatting their resumes. Today, flowery borders, watermarked dollar signs, scented paper, unnecessary graphics, a rainbow of colors, and annoying fonts will not get you an invitation to interview.

Download: Creative Resume Template

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Modern Resume

As applying for jobs has moved to the online environment where resumes and cover letters are uploaded or emailed, you can use more color in your resume design. Just do it judiciously, such as in our Blue Side resume template.

Download: Modern Resume Template

Clean Resume

Unless you are applying for a position in a creative field or one with a company with a creative identity, a clean resume that is easy to read and understand is always a safe choice.

The Goldfish Bowl resume template fits that bill; it is the epitome of simple, clean, professional, and basic, a quality that hiring managers and recruiters appreciate. Think of it as the classic men’s navy suit, or a woman’s standard black dress – it simply never goes out of style.

Download: Clean Resume Template

Infographic Resume

To give potential recruiters and employers a quick snapshot of your skills, experience, awards, and education, an infographic resume is the way to go. Our most popular resume template in this format is Boast, and it does a beautiful job of highlighting your work history, but also showing your creative nature, education, skills, and any industry awards and honors you’ve received. It is not over-designed, and it is easy for hiring managers to determine if you are a fit for their needs.

Download: Infographic Resume Template

Simple Resume

The Talented resume template provides wide margins and bold headers that make this chronological resume easy on the eyes. It is a perfect executive resume template that allows for plenty of room to highlight your work experience and education. Individuals applying to traditional companies and those in the service industry or industrial fields will find it will suit their needs.

Download: Simple Resume Template

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Sunday, 10 September 2017

What’s new in Selenium 3.0

Selenium 3.0 is on its way. Currently in its beta release, expected to be launched soon. So, what’s new in Selenium 3.0? As per official selenium website, beta 4 is supposed to be the last beta release before the final official release of selenium 3.0.

Learn Selenium Automation Testing from Expert Testers

Selenium 1.0 to Selenium 2.0

Selenium 2.0, more popularly known as Selenium web driver API made Selenium the automation testing framework of choice. Pre-Selenium 2.0, HP QTP was the leading automation testing choice. But selenium web driver changed all that and now it’s a tool of choice for automation testing.

Selenium 2.0 maintained two core components – Selenium Core and Web driver APIs working together. But it got rid of Selenium RC server and injecting code into your pages to automate testing. Web Driver APIs made it simpler to write automation scripts for any browser by simply using the appropriate driver for any browser.

Selenium 3.0 – Core Changes

Selenium Core is gone

With the release of Selenium 3.0, there is no selenium core. Selenium 2 supported selenium core for backward compatibility. There is no selenium core in version 3.0. Selenium official blog states that

Over time, the needs of modern web testing have grown ever more complicated and sophisticated, and Selenium Core is now less capable of meeting these needs than it was before.

This means that if you or your company is using Selenium core, you need to migrate your code.

Selenium IDE exported script

If you use selenium IDE to write code and export it in table format for execution purposes, you need to use a new test runner. Selenium Html Runner can be used for this purpose and is available in the download section of Selenium official website.

Gecko Driver for Mozilla

Though completely independent of Selenium 3.0 release, Mozilla is making structural changes to the its Firefox driver. Firefox versions prior to version 48, had web driver integrated and you didn’t need to provide the path of the webdriver executable. However with Firefox 48 and beyond, this has changed. Just like Internet Explorer / Edge or Chrome browser, you need to now provide the path of Firefox gecko driver executable.

This is nothing to do with selenium 3 but with Mozilla. So even if you are using Selenium 2.0, you will need to invoke gecko driver with Firefox 48 and above.

Gecko Driver Location

In the next few articles, we will be writing a few examples to demonstrate the selenium 3.0 new features

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Saturday, 2 September 2017

Four V's of Big Data - Learn Big Data Hadoop

Big Data:

Big data describes a holistic information management strategy that includes and integrates many new types of data and data management alongside traditional data.

Complete Topics to be a Professional Hadoop Developer

Four V’s of Big Data

Volume:

The amount of data. While volume indicates more data, it is the granular nature of the data that is unique. Big data requires processing high volumes of low-density, unstructured Hadoop data—that is, data of unknown value, such as,

Twitter data feeds, click streams on a web page and a mobile app, network traffic, sensor-enabled equipment capturing data at the speed of light, and many more.

It is the task of big data to convert such Hadoop data into valuable information. For some organizations, this might be tens of terabytes, for others it may be hundreds of petabytes.

Velocity:

The fast rate at which data is received and perhaps acted upon. The highest velocity data normally streams directly into memory versus being written to disk.

IOT

Some Internet of Things (IoT) applications have health and safety ramifications that require real-time evaluation and action. Other internet-enabled smart products operate in real time or near real time.

For example, consumer eCommerce applications seek to combine mobile device location and personal preferences to make time-sensitive marketing offers. Operationally, mobile application experiences have large user populations, increased network traffic, and the expectation for immediate response.

Variety:

New unstructured data types. Unstructured and semi-structured data types, such as text, audio, and video require additional processing to both derive meaning and the supporting metadata.

Once understood, unstructured data has many of the same requirements as structured data, such as summarization, lineage, auditability, and privacy.

Further complexity arises when data from a known source changes without notice. Frequent or real-time schema changes are an enormous burden for both transaction and analytical environments.

Value:

Data has intrinsic value—but it must be discovered. There are a range of quantitative and investigative techniques to derive value from data—from discovering a consumer preference or sentiment, to making a relevant offer by location, or for identifying a piece of equipment that is about to fail.

The technological breakthrough is that the cost of data storage and compute has exponentially decreased, thus providing an abundance of data from which statistical analysis on the entire data set versus previously only sample.

The technological breakthrough makes much more accurate and precise decisions possible. However, finding value also requires new discovery processes involving clever and insightful analysts, business users, and executives.

The real big data challenge is a human one, which is learning to ask the right questions, recognizing patterns, making informed assumptions, and predicting behavior.

Learn more: Hadoop Training in Chennai

Resources:

https://www.oracle.com/big-data/index.html

http://www.credosystemz.com/training-in-chennai/best-hadoop-training-in-chennai/

http://searchcloudcomputing.techtarget.com/definition/Hadoop

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Thursday, 17 August 2017

AWS Certifications - Types of AWS Certifications

AWS certifications are aligned to two broad streams – Solutions Architect and DevOps Engineer. The Solutions Architect stream is well defined; you should first bag the Solutions Architect – Associate certification followed by the Solutions Architect – Professional certification. But if you choose to certify yourself as an AWS DevOps Engineer, you have to either clear the Developer – Associate certification or the System Operations (SysOps) Administrator – Associate certifications. Of course, you should choose based on your current job or the stream of specialization you aspire for.

Alternatively, AWS allows you to containerize its suite of certifications into three blocks – Solutions Architect,Developer and SysOps. While Solutions Architect is an independent stream in itself, a Developer and/or SysOps Associate certification can lead you to a DevOps Engineer certification.

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Which AWS Certification to choose?

AWS Certified Solutions Architect – Associate

FEE - 150$,

Indian Money - 9743.25INR

AWS Certified Developer – Associate

FEE - 75$,

Indian Money - 4871.63INR

AWS Certified SysOps Administrator – Associate

FEE - 150$,

Indian Money - 9743.25INR

AWS Certified Solutions Architect – Professional

FEE - 300$,

Indian Money - 19486.50INR

AWS Certified DevOps Engineer – Professional

FEE - 300$,

Indian Money - 19486.50INR

FREE PDF: Complete AWS Course Content

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Tuesday, 1 August 2017

Apache Cassandra - Features of Apache Cassandra - Learn Apache Cassandra

Apache Cassandra:

What is Cassandra?

The Apache Cassandra database is the right choice when you need scalability and high availability without compromising performance.

Linear scalability and proven fault-tolerance on commodity hardware or cloud infrastructure make it the perfect platform for mission-critical data.

Cassandra's support for replicating across multiple datacenters is best-in-class, providing lower latency for your users and the peace of mind of knowing that you can survive regional outages.

Features of Cassandra

Cassandra has become so popular because of its outstanding technical features. Given below are some of the features of Cassandra:

Elastic scalability - Cassandra is highly scalable; it allows to add more hardware to accommodate more customers and more data as per requirement.

Always on architecture - Cassandra has no single point of failure and it is continuously available for business-critical applications that cannot afford a failure.

Fast linear-scale performance - Cassandra is linearly scalable, i.e., it increases your throughput as you increase the number of nodes in the cluster. Therefore it maintains a quick response time.

Flexible data storage - Cassandra accommodates all possible data formats including: structured, semi-structured, and unstructured. It can dynamically accommodate changes to your data structures according to your need.

Easy data distribution - Cassandra provides the flexibility to distribute data where you need by replicating data across multiple data centers.

Transaction support - Cassandra supports properties like Atomicity, Consistency, Isolation, and Durability (ACID).

Fast writes - Cassandra was designed to run on cheap commodity hardware. It performs blazingly fast writes and can store hundreds of terabytes of data, without sacrificing the read efficiency.

Resources:

Saturday, 29 July 2017

AWS - Amazon Web Services - Benefits - Certifications - Roles & Responsibilities

Amazon Web Services (AWS) is a secure cloud services platform, offering compute power, database storage, content delivery and other functionality to help businesses scale and grow. Explore how millions of customers are currently leveraging AWS cloud products and solutions to build sophisticated applications with increased flexibility, scalability and reliability.

What is AWS?

AWS is actually a subsidiary of Amazon.com which provides cloud computing platform on demand for many organization. A secure could services platform which offers database storage, content delivery, compute power and other functionalities which helps in business growth. Check here about all the latest topics of Amazon Web Services(Pdf download ava)

Benefits of AWS

The benefits of AWS andcloud computing overall are significant. According to Gartner, between 2013 and 2015, infrastructure-as-as-service (IaaS) will grow from $8.1B to $15.5B (91%); platform-as-a-service (PaaS) will grow from $1.2B to $1.8B (50%); and software-as-a-service (SaaS) will grow from $14.5B to $22.1B (52%). Thus, the total market spend for cloud computing will increase from $23.8B to $39.4B (66%). Cloud computing is here. Leveraging the benefits of AWS can dramatically increase both the effectiveness and efficiency of your company.

AWS Administrator Roles and Responsibilities

An AWS Administrator must have the following Roles and Responsibilities to be a appear for AWS Certification exam.
Can able to Deploy, Manage and Operate highly scalable fault tolerance systems on AWS
Knowledge in Migrating an existing application to AWS
The flow of data to and from AWS can be implemented and controlled
Appropriate AWS service selection based on the data
Estimating and controlling the AWS usuage cost, operational cost

AWS Certification

AWS Certified Solutions Architect
AWS Certified Developer
AWC Certified SysOps Administrator
AWS Certified Solutions Architect
AWS Certified DevOps Engineer
AWS Certified Big Data
AWS Certified Advanced Networking

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Resources:

http://2ndwatch.com/blog/benefits-of-amazon-web-services-aws/
https://aws.amazon.com/certification/our-certifications/
http://www.credosystemz.com/training-in-chennai/best-amazon-web-services-training-in-chennai/

Wednesday, 12 July 2017

Learn Advanced Java from Experts

Q1. What is the difference between an Inner Class and a Sub-Class?

Ans: An Inner class is a class which is nested within another class. An Inner class has access rights for the class which is nesting it and it can access all variables and methods defined in the outer class.

A sub-class is a class which inherits from another class called super class. Sub-class can access all public and protected methods and fields of its super class.

Q2. What are the various access specifiers for Java classes?

Ans: In Java, access specifiers are the keywords used before a class name which defines the access scope. The types of access specifiers for classes are:

1. Public : Class,Method,Field is accessible from anywhere.

2. Protected:Method,Field can be accessed from the same class to which they belong or from the sub-classes,and from the class of same package,but not from outside.

3. Default: Method,Field,class can be accessed only from the same package and not from outside of it’s native package.

4. Private: Method,Field can be accessed from the same class to which they belong.

Q3. What’s the purpose of Static methods and static variables?

Ans: When there is a requirement to share a method or a variable between multiple objects of a class instead of creating separate copies for each object, we use static keyword to make a method or variable shared for all objects.

Q4. What is data encapsulation and what’s its significance?

Ans: Encapsulation is a concept in Object Oriented Programming for combining properties and methods in a single unit.

Encapsulation helps programmers to follow a modular approach for software development as each object has its own set of methods and variables and serves its functions independent of other objects. Encapsulation also serves data hiding purpose.

Q5. What is a singleton class? Give a practical example of its usage.

A singleton class in java can have only one instance and hence all its methods and variables belong to just one instance. Singleton class concept is useful for the situations when there is a need to limit the number of objects for a class.

The best example of singleton usage scenario is when there is a limit of having only one connection to a database due to some driver limitations or because of any licensing issues.

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Q6. What are Loops in Java? What are three types of loops?

Ans: Looping is used in programming to execute a statement or a block of statement repeatedly. There are three types of loops in Java:

1) For Loops

For loops are used in java to execute statements repeatedly for a given number of times. For loops are used when number of times to execute the statements is known to programmer.

2) While Loops

While loop is used when certain statements need to be executed repeatedly until a condition is fulfilled. In while loops, condition is checked first before execution of statements.

3) Do While Loops

Do While Loop is same as While loop with only difference that condition is checked after execution of block of statements. Hence in case of do while loop, statements are executed at least once.

Q7. What is the difference between double and float variables in Java?

Ans: In java, float takes 4 bytes in memory while Double takes 8 bytes in memory. Float is single precision floating point decimal number while Double is double precision decimal number.

Q8. What is Final Keyword in Java? Give an example.

Ans: In java, a constant is declared using the keyword Final. Value can be assigned only once and after assignment, value of a constant can’t be changed.

In below example, a constant with the name const_val is declared and assigned avalue:

Private Final int const_val=100

When a method is declared as final,it can NOT be overridden by the subclasses.This method are faster than any other method,because they are resolved at complied time.

When a class is declares as final,it cannot be subclassed. Example String,Integer and other wrapper classes.

Q9. What’s the base class in Java from which all classes are derived?

Ans: java.lang.object

Q10. Can main() method in Java can return any data?

Ans: In java, main() method can’t return any data and hence, it’s always declared with a void return type.

Q11. What are Java Packages? What’s the significance of packages?

Ans: In Java, package is a collection of classes and interfaces which are bundled together as they are related to each other. Use of packages helps developers to modularize the code and group the code for proper re-use. Once code has been packaged in Packages, it can be imported in other classes and used.

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Q12. Can we declare a class as Abstract without having any abstract method?

Ans: Yes we can create an abstract class by using abstract keyword before class name even if it doesn’t have any abstract method. However, if a class has even one abstract method, it must be declared as abstract otherwise it will give an error.

Q13. What’s the difference between an Abstract Class and Interface in Java?

Ans: The primary difference between an abstract class and interface is that an interface can only possess declaration of public static methods with no concrete implementation while an abstract class can have members with any access specifiers (public, private etc) with or without concrete implementation.

Another key difference in the use of abstract classes and interfaces is that a class which implements an interface must implement all the methods of the interface while a class which inherits from an abstract class doesn’t require implementation of all the methods of its super class.

A class can implement multiple interfaces but it can extend only one abstract class.

Q14. What are the performance implications of Interfaces over abstract classes?

Ans: Interfaces are slower in performance as compared to abstract classes as extra indirections are required for interfaces. Another key factor for developers to take into consideration is that any class can extend only one abstract class while a class can implement many interfaces.

Use of interfaces also puts an extra burden on the developers as any time an interface is implemented in a class; developer is forced to implement each and every method of interface.

Q15. Does Importing a package imports its sub-packages as well in Java?

Ans: In java, when a package is imported, its sub-packages aren’t imported and developer needs to import them separately if required.

For example, if a developer imports a package university.*, all classes in the package named university are loaded but no classes from the sub-package are loaded. To load the classes from its sub-package ( say department), developer has to import it explicitly as follows:

Import university.department.*

Q16. Can we declare the main method of our class as private?

Ans: In java, main method must be public static in order to run any application correctly. If main method is declared as private, developer won’t get any compilation error however, it will not get executed and will give a runtime error.

Q17. How can we pass argument to a function by reference instead of pass by value?

Ans: In java, we can pass argument to a function only by value and not by reference.

Q18. How an object is serialized in java?

Ans: In java, to convert an object into byte stream by serialization, an interface with the name Serializable is implemented by the class. All objects of a class implementing serializable interface get serialized and their state is saved in byte stream.

Q19. When we should use serialization?

Ans: Serialization is used when data needs to be transmitted over the network. Using serialization, object’s state is saved and converted into byte stream .The byte stream is transferred over the network and the object is re-created at destination.

Q20. Is it compulsory for a Try Block to be followed by a Catch Block in Java for Exception handling?

Ans: Try block needs to be followed by either Catch block or Finally block or both. Any exception thrown from try block needs to be either caught in the catch block or else any specific tasks to be performed before code abortion are put in the Finally block.

Q21. Is there any way to skip Finally block of exception even if some exception occurs in the exception block?

Ans: If an exception is raised in Try block, control passes to catch block if it exists otherwise to finally block. Finally block is always executed when an exception occurs and the only way to avoid execution of any statements in Finally block is by aborting the code forcibly by writing following line of code at the end of try block:

Q22. Can a class have multiple constructors?

Ans: Yes, a class can have multiple constructors with different parameters. Which constructor gets used for object creation depends on the arguments passed while creating the objects.

Q23. Can we override static methods of a class?

Ans: We cannot override static methods. Static methods belong to a class and not to individual objects and are resolved at the time of compilation (not at runtime).Even if we try to override static method,we will not get an complitaion error,nor the impact of overriding when running the code.

Q24. Is String a data type in java?

Ans: String is not a primitive data type in java. When a string is created in java, it’s actually an object of Java.Lang.String class that gets created. After creation of this string object, all built-in methods of String class can be used on the string object.

Q25. What’s the difference between an array and Vector?

Ans: An array groups data of same primitive type and is static in nature while vectors are dynamic in nature and can hold data of different data types.

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