Etech Technology Solutions Interview Questions and Answers

To switch between tabs in a browser using Selenium, we can use the getWindowHandles() method and switchTo() method.

• Use getWindowHandles() method to get the handles of all open tabs

• Store the handles in a Set

• Use switchTo() method to switch to a specific tab by passing the handle as an argument

Code to give rating in webtable for given applicant name and rating as input.

• Create a function that takes applicant name and rating as input.

• Search for the applicant name in the webtable.

• Update the rating for the applicant in the webtable.

• Return the updated webtable.

Count the number of repeated integers in an array

• Iterate through the array and use a hash table to keep track of the count of each number

• Return the count of numbers with a count greater than 1

Design an online automobile service center website

• Include a user-friendly interface for booking appointments and services

• Provide detailed information about the services offered and their pricing

• Incorporate a feature for customers to track the progress of their service

• Include a section for customer reviews and ratings

• Ensure the website is mobile-responsive for easy access on-the-go

React lifecycle, Fragment vs React.Fragment, React.PureComponent

• React lifecycle consists of mounting, updating, and unmounting phases

• Fragment is a shorthand for React.Fragment, used to group multiple elements

• React.PureComponent is a class component that implements shouldComponentUpdate method for performance optimization

JavaScript hoisting and differences between let, var and const.

• Hoisting is a JavaScript mechanism where variables and function declarations are moved to the top of their scope.

• Var declarations are hoisted to the top of their scope, while let and const declarations are not.

• Var can be redeclared and reassigned, let can be reassigned but not redeclared, and const cannot be reassigned or redeclared.

• Using const is recommend...read more

Prevent rerendering of a child component in React

• Use shouldComponentUpdate() lifecycle method

• Use React.memo() to memoize functional components

• Use PureComponent instead of Component

• Pass props as a callback function to avoid unnecessary re-renders

• Use React.PureComponent for class components

• Use React.memo() for functional components

I am a recent IT graduate with a passion for coding and problem-solving.

• Graduated with a degree in IT

• Proficient in programming languages such as Java and Python

• Experience in developing web applications using HTML, CSS, and JavaScript

• Strong analytical and problem-solving skills

• Ability to work well in a team and communicate effectively

Mathematics provides a strong foundation for problem-solving and analytical skills, which are essential in IT.

• Mathematics involves logical thinking and problem-solving, which are crucial skills in IT.

• Mathematical concepts such as algorithms, statistics, and calculus are widely used in IT.

• Mathematics also helps in developing a strong analytical mindset, which is essential in data analysis and software development.

• Mathem...read more

Steps to join IT include obtaining relevant education, gaining experience through internships or entry-level positions, and networking.

• Obtain relevant education such as a degree in computer science or IT

• Gain experience through internships or entry-level positions

• Develop technical skills through online courses or certifications

• Build a professional network through attending industry events or joining professional organiz...read more

I have knowledge of programming languages such as Java, Python, and C++. I am also familiar with web development technologies like HTML, CSS, and JavaScript.

• Proficient in Java, Python, and C++ programming languages

• Familiar with web development technologies like HTML, CSS, and JavaScript

• Knowledge of database management systems like MySQL and Oracle

• Experience with version control systems like Git

• Understanding of software...read more

I know multiple programming languages including Java, Python, and C++.

• Java - used for building enterprise-level applications

• Python - known for its simplicity and versatility

• C++ - used for system programming and game development

A pointer is a variable that stores the memory address of another variable.

• Pointers allow direct manipulation of memory.

• They are used to access and modify data indirectly.

• Pointers are commonly used in dynamic memory allocation.

• Example: int* ptr; // declares a pointer to an integer variable.

A null pointer is a pointer that does not point to any memory location.

• A null pointer is represented by the value 0 or NULL.

• Dereferencing a null pointer results in a segmentation fault.

• Null pointers are commonly used to indicate the end of a linked list or array.

• Null pointers can be assigned to any pointer type.

Structures are user-defined data types that allow storing multiple data types under a single name.

• Structures are used to group related data together.

• They can contain variables of different data types.

• Structures can also contain functions.

• Structures are defined using the 'struct' keyword.

• Example: struct student { char name[20]; int age; float marks; };

• Structures can be passed as arguments to functions.

• They can also be u...read more

A nested structure is a structure within another structure in programming.

• It allows for more complex data structures to be created

• It can be used in various programming languages such as C++, Java, and Python

• An example of a nested structure is a struct within a struct in C++

Classes are templates for creating objects that have similar properties and methods.

• Classes are used in object-oriented programming.

• They define the properties and methods that objects of that class will have.

• Objects are instances of a class.

• Classes can inherit properties and methods from other classes.

• Examples of classes include 'Person', 'Car', and 'Animal'.

Classes in C++ are user-defined data types that encapsulate data and functions.

• Classes are used for object-oriented programming.

• They allow for data abstraction and encapsulation.

• Classes can have member variables and member functions.

• Objects are instances of classes.

• Inheritance and polymorphism are key features of classes.

In 5 years, I see myself as a senior IT professional, leading a team and contributing to the growth and success of the organization.

• Leading a team of IT professionals

• Contributing to the growth and success of the organization

• Continuously learning and staying updated with the latest technologies

• Taking up challenging projects and delivering successful solutions

• Building strong professional relationships and networking with

Yes, I am willing to work in night shifts and relocate if required.

• I am flexible and adaptable to different work schedules, including night shifts.

• I understand the importance of providing 24/7 support in the IT industry.

• I am open to relocating for better career opportunities and growth.

• I have a strong commitment to my work and can adjust to new environments.

• I am willing to make necessary arrangements to ensure smooth t