30+ First Flight Couriers Interview Questions and Answers

The candidate was asked various questions related to software development and testing.

• To write a palindrome program without using any in-built method, the candidate can use a loop to compare characters from both ends of the string.

• To approach and run only 50 out of 500 test cases, the candidate can prioritize the test cases based on criticality and execute the most important ones first.

• The framework used in the candidate's project was not mentioned.

• To handle a team member's a...read more

Answers to interview questions for Sdet Lead position

• 1. FluentWait syntax: FluentWait wait = new FluentWait<>(driver)

• 2. To scroll to the bottom of the page in Selenium, you can use JavaScriptExecutor or Actions class

• 3. Syntax for Implicit Wait: driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS)

• Implicit Wait is not part of Overloading or Overriding

• 4. JavaScriptExecutor is an interface in Selenium that allows executing JavaScript code in the context of the current...read more

Test engineers encounter various scenarios when troubleshooting, such as software bugs, hardware malfunctions, and network issues.

• Identifying and resolving software bugs in the code

• Troubleshooting hardware malfunctions in devices or equipment

• Resolving network issues affecting communication between systems

I have a strong knowledge of IT infrastructure including networking, servers, storage, and virtualization.

• Understanding of networking principles such as TCP/IP, DNS, DHCP

• Experience with server administration including Windows Server and Linux

• Knowledge of storage technologies like SAN, NAS, and RAID

• Familiarity with virtualization platforms such as VMware or Hyper-V

• Ability to troubleshoot hardware and software issues in an IT environment

I handle errors by using error handling mechanisms like try-catch blocks and returning error codes or messages.

• Use try-catch blocks to catch and handle errors

• Return error codes or messages to indicate the type of error

• Implement error handling mechanisms like panic and recover in Go

Dependency injection in Dot net core is a design pattern where classes receive their dependencies from external sources rather than creating them.

• Dependency injection allows for better decoupling of components in an application.

• In Dot net core, dependency injection is built into the framework and can be easily configured in the Startup class.

• Services are registered in the ConfigureServices method of the Startup class and can be injected into controllers or other classes.

• Examp...read more

System related commands are used to interact with the operating system and manage system resources.

• System commands are used to perform tasks such as managing files, directories, processes, and users.

• Examples of system commands include ls, cd, mkdir, ps, and useradd.

• System commands can be executed through the command line interface (CLI) or terminal.

To check IT system utilisation, monitor CPU, memory, disk usage, network traffic, and application performance.

• Monitor CPU usage using Task Manager or Resource Monitor

• Check memory usage with Task Manager or Resource Monitor

• Monitor disk usage with Task Manager or Disk Management tools

• Analyze network traffic with network monitoring tools like Wireshark

• Monitor application performance with performance monitoring tools like PerfMon

I have handled multi threading by using goroutines and channels in Golang.

• Used goroutines to run concurrent tasks

• Used channels to communicate between goroutines

• Avoided race conditions by using mutexes or sync package

I have experience in MySQL and database management including data modeling, query optimization, and performance tuning.

• Designed and implemented database schemas for various projects

• Optimized complex queries for improved performance

• Performed database maintenance tasks such as backups and indexing

• Troubleshooted and resolved database issues

• Implemented security measures to protect data integrity

Implemented a new data analysis tool that reduced processing time by 30%.

• Identified bottlenecks in the current process

• Analyzed data to understand root causes of inefficiencies

• Collaborated with stakeholders to implement new tool

• Trained team members on how to use the tool effectively

The support command in Linux is used to display system information and statistics.

• Use 'support' command to display system information and statistics

• Can be used to troubleshoot system issues

• Examples: support -v, support --help

A modem is a device that connects a computer to the internet through a telephone or cable line. Wireless technology enables devices to connect to a network without the need for physical cables.

• A modem is a hardware device that modulates and demodulates signals to transmit data over a communication channel.

• It allows computers to connect to the internet by converting digital data into analog signals that can be transmitted over telephone or cable lines.

• Wireless technology uses ...read more

Packages in Dot net core are collections of reusable code that can be easily distributed and managed.

• Packages contain libraries, frameworks, and tools that can be used in .NET Core applications.

• They are distributed via NuGet, a package manager for .NET.

• Packages help in managing dependencies and simplifying the development process.

• Example: Entity Framework Core is a popular package used in .NET Core applications.

Playwright installation, add 2+"2" in typescript

• Install Playwright using npm install playwright

• Create a TypeScript file and add the following code: const result = 2 + parseInt('2');

• Run the TypeScript file using tsc filename.ts && node filename.js

• Check the result variable to see the output

APIs and data mapping are linked by defining the data structure in the API response and mapping it to the corresponding fields in the database.

• Understand the data structure of the API response

• Identify the relevant data fields in the API response

• Map the API data fields to the corresponding fields in the database

• Ensure data consistency and accuracy through proper mapping

• Use tools like Postman for API testing and validation

I have worked with various architectures including monolithic, microservices, serverless, and event-driven.

• Monolithic architecture involves building a single, indivisible unit for an application.

• Microservices architecture breaks down the application into smaller, independent services.

• Serverless architecture allows developers to focus on writing code without worrying about infrastructure.

• Event-driven architecture enables communication between services based on events.

To check a port in command, you can use the 'netstat' command in the command prompt or terminal.

• Use the 'netstat' command followed by the '-an' flag to display all active connections and listening ports

• Look for the specific port number in the output to see if it is open or in use

• You can also use the 'telnet' command followed by the IP address and port number to check if a port is open

Recruitment is the process of finding, attracting, and selecting qualified candidates for a job or position within an organization.

• Recruitment involves identifying the staffing needs of an organization

• It includes sourcing potential candidates through various channels such as job boards, social media, and referrals

• Recruiters screen and interview candidates to assess their qualifications and fit for the role

• The final step is making a job offer to the selected candidate

String buffer is synchronized and thread-safe, while string builder is not synchronized and faster.

• String buffer is synchronized, making it thread-safe for use in multi-threaded environments.

• String builder is not synchronized, making it faster but not thread-safe.

• String builder is preferred for single-threaded operations where synchronization is not needed.

• Example: StringBuffer sb = new StringBuffer(); StringBuilder sb = new StringBuilder();

Use SQL to display the email for a given username from a data set, grouped by username.

• Use a SQL query to select the email for the input username from the data set

• Group the results by username using the GROUP BY clause

• Ensure to handle cases where the username may not exist in the data set

Stream API in Java provides a way to process collections of objects in a functional style.

• Stream API allows for easy and efficient processing of collections using functional programming concepts like map, filter, reduce, etc.

• It supports lazy evaluation, which means elements are processed only when needed.

• Example: List names = Arrays.asList("Alice", "Bob", "Charlie"); Stream stream = names.stream();

chmod command is used in Unix and Unix-like operating systems to change the permissions of a file or directory.

• chmod command is used to change the permissions of a file or directory in Unix and Unix-like operating systems.

• It can be used to add or remove read, write, and execute permissions for the owner, group, and others.

• For example, to give read, write, and execute permissions to the owner of a file: chmod u+rwx filename

• To remove write permission for the group: chmod g-w fi...read more

Libraries such as scikit-learn, TensorFlow, and Keras are commonly used for predictive model building.

• scikit-learn

• TensorFlow

• Keras

PUT is used to update or replace an entire resource, while PATCH is used to update or modify a part of a resource.

• PUT is idempotent, meaning multiple identical requests will have the same effect as a single request

• PATCH is not necessarily idempotent, as multiple identical requests may have different effects

• PUT requires the client to send the entire updated resource, while PATCH only requires the client to send the specific changes

Request pipeline is a series of steps that a request goes through from start to finish in a software system.

• Request pipeline helps in processing and handling incoming requests efficiently.

• Each step in the pipeline performs a specific task such as authentication, validation, processing, and response generation.

• Examples of request pipeline include HTTP request processing in web servers like Apache or Nginx.

Extension methods are a way to add new methods to existing types without modifying the original type.

• Extension methods allow you to add new functionality to existing types without modifying them

• They are defined as static methods in a static class

• They must be in the same namespace as the type being extended

• Extension methods are called like regular instance methods

Request delegate is a function that handles incoming HTTP requests and generates responses.

• Request delegate is used in ASP.NET Core to process HTTP requests.

• It can be used to route requests to appropriate controllers or actions.

• Request delegates can be middleware components in the request processing pipeline.

Check if a string has matching paranthesis

• Use a stack data structure to keep track of opening and closing paranthesis

• Iterate through the string and push opening paranthesis onto the stack

• When a closing paranthesis is encountered, pop from the stack and check if it matches the corresponding opening paranthesis

• If stack is empty at the end of iteration, all paranthesis are matched

Middleware is software that acts as a bridge between different applications or systems, facilitating communication and data exchange.

• Middleware helps different software components communicate with each other

• It can provide services such as authentication, data transformation, and message queuing

• Examples include Apache Kafka, RabbitMQ, and Microsoft BizTalk

Decorators in Python are functions that modify the behavior of other functions or methods.

• Decorators are denoted by the @ symbol followed by the decorator name.

• They are commonly used for logging, timing, authentication, and more.

• Example: @staticmethod decorator in Python is used to define a method that is not bound to the class instance.

Collabera offers a dynamic work environment with opportunities for growth and success. Sales allows me to utilize my communication and negotiation skills to drive business growth.

• Collabera provides a supportive and collaborative work culture

• Opportunities for career advancement and professional development

• Sales role allows me to leverage my communication and negotiation skills

• Excited about driving business growth and achieving sales targets

List is mutable, tuple is immutable in Python.

• List can be modified after creation, tuple cannot.

• List is defined using square brackets [], tuple using parentheses ().

• Example: list_example = [1, 2, 3], tuple_example = (4, 5, 6)

Polymorphism is the ability of a single function or method to operate on different types of data.

• Polymorphism allows objects of different classes to be treated as objects of a common superclass.

• There are two types of polymorphism: compile-time (method overloading) and runtime (method overriding).

• Example: Inheritance in object-oriented programming languages like Java allows for polymorphism.

System design patterns are reusable solutions to common problems in software design.

• System design patterns help in organizing code, improving scalability, and enhancing maintainability.

• Examples include MVC (Model-View-Controller), Singleton, Factory, Observer, and Dependency Injection.

• Each pattern has its own set of rules and best practices to follow for implementation.

CI/CD stands for Continuous Integration/Continuous Deployment. It is a set of steps that automate the process of code integration, testing, and deployment.

• Continuous Integration (CI) involves automatically building and testing code changes frequently.

• Continuous Deployment (CD) involves automatically deploying code changes to production after passing tests.

• CI/CD pipeline typically includes steps like code compilation, unit testing, integration testing, deployment to staging, a...read more

The 'new' keyword is used in object-oriented programming to create a new instance of a class.

• Used to allocate memory for a new object

• Invokes the constructor of a class to initialize the object

• Returns a reference to the newly created object