30+ Expleo Group Interview Questions and Answers

I have a strong understanding of Java programming language, including object-oriented concepts, data structures, and algorithms.

• Proficient in Java syntax and core concepts such as classes, objects, inheritance, polymorphism, and encapsulation

• Experience with data structures like arrays, linked lists, stacks, queues, and trees in Java

• Familiarity with Java libraries and frameworks like Spring, Hibernate, and JUnit

• Knowledge of Java multithreading, exception handling, and input/ou...read more

Embedded C is a programming language used for developing software for embedded systems.

• It is a subset of the C programming language

• It is used for programming microcontrollers, sensors, and other embedded systems

• It has limited resources and memory, so code optimization is crucial

• It includes basic data types like int, char, and float, as well as enums and structs

• Examples of embedded systems include automotive systems, medical devices, and consumer electronics

Errors are mistakes in a program that prevent it from running correctly.

• Syntax errors: occur when code is not written correctly (e.g. missing semicolon)

• Logic errors: occur when code does not produce the expected output (e.g. incorrect formula)

• Runtime errors: occur during program execution (e.g. division by zero)

Exception handling in Java is a mechanism to handle runtime errors and prevent program crashes.

• Exceptions are objects that are thrown at runtime when an abnormal condition occurs.

• Try block is used to enclose the code that might throw an exception.

• Catch block is used to handle the exception that is thrown in the try block.

• Finally block is used to execute code regardless of whether an exception is thrown or not.

• Example: try { // code that might throw exception } catch (Exceptio...read more

Web applications are software programs that run on web servers and are accessed through web browsers.

• Web applications are accessed through a web browser

• They run on web servers

• They can be accessed from any device with an internet connection

• Examples include online banking systems, social media platforms, and e-commerce websites

Yes, CTC is acceptable for me.

• Yes, CTC is acceptable for me as long as it is within the range I am looking for.

• I am open to discussing the CTC offered and negotiating if needed.

• I value the overall compensation package, including benefits, in addition to the CTC.

• I have researched the market rates for similar positions to ensure the CTC is competitive.

Validation of components involves testing and verifying their functionality and performance.

• Performing unit tests to ensure individual components work correctly

• Conducting integration tests to verify components work together as expected

• Running regression tests to check for any unintended changes in functionality

• Utilizing automated testing tools to streamline the validation process

• Collaborating with stakeholders to gather feedback and make necessary adjustments

Spring MVC is a framework for building web applications in Java. It follows the Model-View-Controller architectural pattern.

• Spring MVC separates the application into three main components: Model, View, and Controller.

• The Model represents the data and business logic of the application.

• The View is responsible for rendering the user interface.

• The Controller handles user requests, processes them, and interacts with the Model and View.

• Spring MVC provides a DispatcherServlet that a...read more

To handle load in production server, we can use techniques like load balancing, caching, optimizing database queries, and scaling horizontally.

• Implement load balancing to distribute the incoming traffic across multiple servers.

• Use caching to store frequently accessed data and reduce the load on the server.

• Optimize database queries by indexing, using query optimization techniques, and avoiding unnecessary queries.

• Scale horizontally by adding more servers to handle increased lo...read more

Conditional loops in Java are used to execute a block of code repeatedly based on a condition.

• Use 'if' statement to execute a block of code only if a specified condition is true.

• Use 'while' loop to execute a block of code as long as a specified condition is true.

• Use 'for' loop to execute a block of code a specified number of times.

DFMEA stands for Design Failure Mode and Effects Analysis. It is a systematic approach to identifying and preventing potential failures in a product or process.

• DFMEA involves identifying potential failure modes, their causes, effects, and the likelihood of their occurrence.

• It helps prioritize design improvements to mitigate risks and enhance product reliability.

• DFMEA is typically conducted during the design phase of a project to proactively address potential issues before the...read more

I encountered a brake failure in a vehicle and resolved it by replacing the brake pads.

• Identified the issue during routine maintenance check

• Inspected the brake system to pinpoint the cause of the failure

• Replaced the worn-out brake pads with new ones

• Tested the vehicle to ensure the brakes were functioning properly

There are different types of memory, such as RAM, ROM, and cache memory.

• RAM (Random Access Memory) is volatile memory that stores data temporarily while the computer is on.

• ROM (Read-Only Memory) is non-volatile memory that stores firmware and cannot be easily modified.

• Cache memory is a small, high-speed memory that stores frequently accessed data for faster retrieval.

GD&T stands for Geometric Dimensioning and Tolerancing. It is used to define the nominal geometry of parts and assemblies, as well as the allowable variations.

• GD&T is used to communicate design intent and ensure parts fit together properly.

• It provides a clear and concise way to specify tolerances on dimensions, form, orientation, and location of features.

• GD&T helps improve quality, reduce costs, and increase efficiency in manufacturing processes.

• Examples of GD&T symbols inclu...read more

Fibonacci series program in Java generates a sequence of numbers where each number is the sum of the two preceding ones.

• Use a loop to iterate through the desired number of Fibonacci numbers.

• Initialize variables to store the first two numbers in the sequence.

• Calculate the next number by adding the previous two numbers.

• Repeat the process until the desired number of Fibonacci numbers is generated.

The @Controller annotation is used to create a controller class in Spring MVC, while @RestController is used to create a RESTful web service.

• The @Controller annotation is used for traditional web applications that return views.

• The @RestController annotation is used for creating RESTful web services that return JSON or XML responses.

• The @RestController annotation is a combination of @Controller and @ResponseBody annotations.

• The @RestController annotation eliminates the need fo...read more

The interview questions are related to software testing concepts such as STLC, bug life cycle, regression, smoke and sanity testing, Selenium basics, and Java OOP concepts.

• STLC (Software Testing Life Cycle) is a subset of SDLC (Software Development Life Cycle) that focuses on testing activities.

• Bug life cycle refers to the different stages a bug goes through from discovery to resolution.

• Regression testing is performed to ensure that changes or fixes in the software do not int...read more

Print duplicates in a string with their count

• Convert string to char array

• Use HashMap to store character count

• Iterate through HashMap to print duplicates

Mitigate low fatigue life by identifying root cause and implementing corrective actions.

• Conduct thorough analysis to identify root cause of low fatigue life

• Implement corrective actions such as design modifications or material changes

• Perform testing to validate effectiveness of corrective actions

• Continuously monitor and analyze fatigue life to ensure long-term success

• Collaborate with cross-functional teams to ensure comprehensive approach

Duplicates can be handled by using software that has a feature to detect and remove them.

• Use software that has a feature to detect and remove duplicates

• Manually check for duplicates by comparing names, contact information, and other relevant details

• Create a system to track which CVs have already been uploaded to avoid duplicates

• Communicate with candidates to ensure they have not already applied or submitted their CV

• Regularly clean up the database to remove any duplicates that...read more

Internal implementation of set is typically based on hash table or balanced tree data structures.

• Sets are typically implemented using hash tables for faster access and retrieval of elements.

• Some sets, like TreeSet in Java, are implemented using balanced trees to maintain elements in sorted order.

• Internal implementation may vary based on the specific set implementation in a programming language.

Object-oriented programming (OOP) is a programming paradigm that uses objects to represent and manipulate data.

• OOP is based on the concept of classes and objects.

• It provides encapsulation, inheritance, and polymorphism.

• Encapsulation hides the internal details of an object and provides a public interface.

• Inheritance allows classes to inherit properties and methods from other classes.

• Polymorphism allows objects of different classes to be treated as objects of a common superclas...read more

Documents and phases serve different purposes in managing projects.

• Documents provide a record of project activities and decisions.

• Phases break down the project into manageable parts.

• Documents help ensure project quality and compliance.

• Phases help manage project risks and resources.

• Examples of documents include project plans, status reports, and meeting minutes.

• Examples of phases include initiation, planning, execution, monitoring and control, and closure.

PPAP is a set of documents used in APQP phases to ensure product quality and customer satisfaction.

• PPAP stands for Production Part Approval Process

• It is a set of documents that includes design records, engineering change orders, and other quality-related documents

• PPAP is used in the APQP (Advanced Product Quality Planning) process to ensure product quality and customer satisfaction

• APQP has five phases: Planning and Program Definition, Product Design and Development, Process D...read more

ECN process involves documenting and implementing changes to a product or system.

• Initiation of change request

• Review and approval of change request

• Implementation of approved changes

• Documentation of changes made

• Communication of changes to relevant stakeholders

SQL is used to manage relational databases while PL/SQL is used to create procedures, functions, and triggers.

• SQL is used to retrieve and manipulate data in a database.

• PL/SQL is used to create stored procedures, functions, and triggers.

• SQL is a declarative language while PL/SQL is a procedural language.

• SQL is used to query data while PL/SQL is used to write code that can be executed.

• SQL is used to create and modify tables, indexes, and constraints while PL/SQL is used to crea...read more

Transfer agent business involves managing shareholder records and transactions for publicly traded companies.

• Transfer agents maintain records of shareholders and their transactions.

• They handle the issuance and transfer of securities.

• They also distribute dividends and other shareholder communications.

• Examples of transfer agents include Computershare, American Stock Transfer & Trust Company, and Broadridge Financial Solutions.

HashMap is a data structure in Java that stores key-value pairs and allows for fast retrieval of values based on keys.

• HashMap is part of the Java Collections framework.

• It implements the Map interface and uses hashing to store elements.

• Example: HashMap map = new HashMap<>(); map.put("key", 1); int value = map.get("key");

Drop deletes the table and its structure while truncate deletes all the data in the table.

• Drop is a DDL command while truncate is a DML command.

• Drop cannot be rolled back while truncate can be rolled back using the undo tablespace.

• Drop is slower than truncate as it deletes the table structure while truncate only deletes the data.

• Drop can be used to delete views, sequences, and other database objects while truncate can only be used on tables.

• Drop releases all the space used by...read more

SFD and BMD of a cantilever are graphical representations of shear force and bending moment along the length of the beam.

• SFD starts from the free end of the cantilever and shows the variation of shear force along the length.

• BMD starts from the fixed end of the cantilever and shows the variation of bending moment along the length.

• At the fixed end of the cantilever, the shear force is zero and the bending moment is maximum.

• At the free end of the cantilever, the bending moment i...read more

A framework is a set of guidelines, rules, and best practices used to develop and maintain automation scripts efficiently.

• Framework provides structure and organization to automation projects

• It helps in reusability of code and reduces maintenance efforts

• Types of frameworks include data-driven, keyword-driven, and hybrid frameworks

• Frameworks often include libraries, utilities, and tools to support automation tasks