400+ Altrocks Tech Interview Questions and Answers

Static variable is a variable that retains its value even after the function execution is completed.

• Declared with static keyword

• Memory is allocated once and shared among all instances of the class or function

• Can be accessed without creating an object of the class

Triggers are database objects that are automatically executed in response to certain events.

• Triggers can be used to enforce business rules, audit changes, or replicate data.

• There are two types of triggers: DML triggers and DDL triggers.

• DML triggers are fired in response to DML statements (INSERT, UPDATE, DELETE).

• DDL triggers are fired in response to DDL statements (CREATE, ALTER, DROP).

10 commonly used Linux commands in daily work

• ls - list directory contents

• cd - change directory

• grep - search for a pattern in a file

• tail - display the last part of a file

• cat - concatenate and display files

• chmod - change file permissions

• sudo - execute a command as a superuser

• ps - display information about running processes

• kill - terminate a process

• ssh - connect to a remote server securely

The best technologies for building a good software testing framework are Selenium, Appium, JUnit, TestNG, and Cucumber.

• Selenium for web application testing

• Appium for mobile application testing

• JUnit and TestNG for unit testing

• Cucumber for behavior-driven testing

• Continuous Integration tools like Jenkins for automated testing

A project should be drafted with all fiber updates in accordance with AT&T guidelines by following specific steps and guidelines.

• Review AT&T guidelines for fiber updates

• Create a detailed project plan outlining all fiber updates

• Ensure all updates meet AT&T specifications and standards

• Coordinate with AT&T representatives for approval and feedback

• Document all changes and updates for future reference

Deadlock occurs when two or more threads are blocked forever, waiting for each other to release resources.

• Deadlock can occur when multiple threads are competing for the same resources.

• To avoid deadlock, use proper synchronization techniques and avoid holding multiple locks at the same time.

• Example: Thread A holds lock 1 and waits for lock 2, while Thread B holds lock 2 and waits for lock 1.

• To detect and resolve deadlock, use tools like jstack and jconsole.

Libraries and packages in Python are reusable collections of code that provide functionality to perform specific tasks.

• Libraries and packages help in reducing the amount of code that needs to be written from scratch

• Popular libraries in Python include NumPy for numerical computing, Pandas for data manipulation, and Matplotlib for data visualization

• Packages can be installed using package managers like pip or conda

CharArray should be used to store passwords for security reasons.

• CharArray is more secure as it can be cleared from memory after use, unlike String which is immutable

• String objects are stored in the String pool and can be accessed by other parts of the program

• CharArray allows for more control over the password data and reduces the risk of exposure

HTML5 is the latest version of the HTML standard, with new features for multimedia, graphics, and interactivity.

• Support for multimedia elements like <video> and <audio>

• Canvas and SVG for graphics rendering

• Improved form controls and validation

• Offline storage capabilities with Local Storage and IndexedDB

• Geolocation API for location-based services

• Web Workers for running scripts in background threads

Run time polymorphism is the ability of a program to determine the object type at runtime and call the appropriate method.

• It is achieved through virtual functions and dynamic binding.

• Allows for more flexible and extensible code.

• Example: a base class Animal with virtual function makeSound() and derived classes Dog and Cat that override makeSound().

• At runtime, if an Animal pointer points to a Dog object, calling makeSound() will execute the Dog's implementation.

IAM groups are collections of IAM users, while IAM roles are permissions that can be assumed by users or services.

• IAM groups are used to manage permissions for multiple users at once

• IAM roles are used to delegate permissions to users or services

• IAM groups can contain multiple users, while IAM roles can only be assumed by one entity at a time

Yes, I have implemented security related functionality in webservices.

• Implemented SSL/TLS encryption for secure communication

• Implemented authentication and authorization mechanisms

• Implemented input validation to prevent injection attacks

• Implemented rate limiting to prevent denial of service attacks

Railway Reservation System for booking train tickets

• Create a database to store train schedules, seat availability, and passenger information

• Develop a user interface for customers to search for trains, select seats, and make payments

• Implement a booking system to reserve seats and generate tickets

• Include features like seat selection, cancellation, and ticket printing

• Ensure security measures for payment processing and data protection

Regression testing is the process of retesting modified software to ensure that previously working functionalities are still intact.

• Regression testing is performed after making changes to software to identify any new defects or issues introduced.

• It helps ensure that existing functionalities are not affected by the changes.

• It involves re-executing test cases that have been previously executed.

• Regression testing can be done manually or using automated testing tools.

• Examples of ...read more

Find the 3rd maximum salary using SQL.

• Use the ORDER BY clause to sort the salaries in descending order.

• Use the LIMIT clause to limit the result to the third row.

• Use the OFFSET clause to skip the first two rows.

• Example: SELECT salary FROM employees ORDER BY salary DESC LIMIT 1 OFFSET 2;

Five commonly used Linux commands

• ls - list directory contents

• cd - change directory

• mkdir - make directory

• rm - remove files or directories

• grep - search for a pattern in a file

Various reports used in previous organizations

• Financial reports such as balance sheets and income statements

• Sales reports including sales by product, region, and customer

• Operational reports like production and inventory reports

• Marketing reports such as campaign performance and customer demographics

• HR reports including employee performance and attendance

• Project management reports like status updates and resource allocation

• Customer service reports such as call volume and resolu...read more

Use SQL query with JOIN to find salaries from 2 tables.

• Use JOIN keyword to combine data from both tables based on a common column

• Specify the columns you want to select from both tables

• Use WHERE clause to filter the results if needed

OOPS concept in C++ refers to Object-Oriented Programming principles like encapsulation, inheritance, polymorphism, and abstraction.

• Encapsulation: bundling data and methods that operate on the data into a single unit (class)

• Inheritance: creating new classes based on existing classes, allowing for code reuse

• Polymorphism: ability for objects of different classes to be treated as objects of a common superclass

• Abstraction: hiding complex implementation details and showing only es...read more

I use LinkedList for insertion and deletion as it provides constant time complexity.

• LinkedList provides constant time complexity for insertion and deletion operations.

• ArrayList provides linear time complexity for these operations.

• LinkedList is preferred when frequent insertion and deletion operations are required.

• ArrayList is preferred when frequent access to elements is required.

Swap 2 numbers without using 3rd variable

• Use addition and subtraction

• Use multiplication and division

• Use bitwise XOR operation

Integration testing is a type of testing where individual units are combined and tested as a group.

• It tests the interaction between different modules or components of a system

• It ensures that the integrated system works as expected

• It can be done either manually or with the help of automated tools

• Examples include API testing, database testing, and end-to-end testing

Query for deleting data from a database table.

• Use the DELETE statement followed by the table name.

• Add a WHERE clause to specify the condition for deleting specific rows.

• Be careful when deleting data as it cannot be recovered.

• Example: DELETE FROM customers WHERE customer_id = 1234;

5G is the fifth generation of wireless technology that promises faster internet speeds, lower latency, and increased connectivity.

• 5G stands for fifth generation and is the latest wireless technology

• It promises faster internet speeds, lower latency, and increased connectivity

• 5G uses higher frequency bands and smaller cell sizes to achieve these benefits

• It will enable new technologies like self-driving cars, virtual reality, and the Internet of Things

• Rollout of 5G networks is c...read more

Answering a question on patterns code, Fibonacci, and removing duplicates from a string program.

• For patterns code, discuss common design patterns like Singleton, Factory, and Observer.

• For Fibonacci, explain the algorithm and provide code examples in Java.

• For removing duplicates from a string, discuss different approaches like using a Set or a Map.

• Emphasize the importance of efficiency and scalability in all three programs.

Convert Monolith to Microservices involves breaking down a large application into smaller, independent services.

• Identify bounded contexts within the monolith

• Decompose the monolith into separate services based on identified bounded contexts

• Implement communication between services using APIs or messaging queues

• Use containerization technologies like Docker for deployment

• Implement service discovery and load balancing for efficient communication between services

Greybox testing involves partial knowledge of internal code, while black box testing is based on external behavior.

• Greybox testing combines elements of white box and black box testing.

• Black box testing focuses on testing the functionality of the software without knowledge of internal code.

• Greybox testing is useful when some knowledge of internal code is needed to design test cases.

• Examples of greybox testing include API testing and regression testing.

• Examples of black box tes...read more

RAC architecture includes multiple nodes sharing a single database. Day to day issues include load balancing and node failures.

• RAC stands for Real Application Clusters

• Multiple nodes share a single database

• Load balancing is a key component

• Node failures can cause downtime

• Common day to day issues include performance tuning and resource allocation

• Oracle Clusterware is used to manage the cluster

• Oracle Automatic Storage Management (ASM) is often used for storage management

Virtual functions are functions that can be overridden by derived classes.

• Virtual functions are declared in a base class and can be overridden in derived classes.

• They allow for polymorphism and dynamic binding.

• The function to be called is determined at runtime based on the object's actual type.

• They are declared using the virtual keyword.

• Example: virtual void myFunction() = 0; // pure virtual function

My strengths include strong analytical skills, attention to detail, and excellent problem-solving abilities.

• Strong analytical skills - able to analyze complex data and identify patterns

• Attention to detail - meticulous in planning and executing fiber network designs

• Excellent problem-solving abilities - adept at finding creative solutions to challenges

React is a JavaScript library for building user interfaces.

• Declarative approach to building UI

• Component-based architecture

• Virtual DOM for efficient updates

• JSX syntax for writing HTML in JavaScript

• One-way data binding

• Support for server-side rendering

• Large and active community

• Integration with other libraries and frameworks

Time complexity refers to the amount of time taken by an algorithm to run as the input size increases.

• It measures the efficiency of an algorithm.

• It is usually expressed in Big O notation.

• An algorithm with a lower time complexity is more efficient than one with a higher time complexity.

Sort a list in Python

• Use the built-in sorted() function to sort the list in ascending order

• Use the sort() method to sort the list in place

• Use the reverse parameter to sort in descending order

Configuring RAC involves setting up shared storage, network, and database components on multiple nodes.

• Configure shared storage using ASM or NFS

• Configure network components such as VIP, SCAN, and listener

• Install Oracle Grid Infrastructure and Oracle Database software on all nodes

• Create a RAC database using DBCA or manually

• Configure load balancing and failover using services

• Use shell scripting and SQL scripting to automate tasks

• Perform regular maintenance tasks such as patchin...read more

Billing process involves generating invoices and collecting payments from customers.

• The billing process starts with creating an invoice based on the products or services provided to the customer.

• The invoice is then sent to the customer via email or mail.

• The customer reviews the invoice and makes the payment through various payment methods such as credit card, bank transfer, or check.

• Once the payment is received, it is recorded in the accounting system and the invoice is marke...read more

Count the number of vowels in a given string

• Iterate through each character in the string and check if it is a vowel (a, e, i, o, u)

• Maintain a count of vowels encountered

• Return the total count of vowels in the string

A copy constructor is a special type of constructor which creates a new object as a copy of an existing object.

• Ensure the copy constructor has the same signature as the default constructor.

• Allocate memory for the new object and copy the values from the existing object.

• Handle deep copy vs shallow copy based on the object's data types.

Different types of objects in a database include tables, views, indexes, sequences, and stored procedures.

• Tables: Used to store data in rows and columns.

• Views: Virtual tables created by a query.

• Indexes: Improve the performance of queries by allowing quick access to specific rows.

• Sequences: Generate unique numbers.

• Stored Procedures: Precompiled SQL code that can be executed with parameters.

Answering Fibonacci series with and without recursion

• Fibonacci series is a sequence of numbers where each number is the sum of the two preceding ones

• Recursion method involves calling the function within itself

• Non-recursive method involves using a loop to calculate the series

• Recursive method is slower and can cause stack overflow for large inputs

• Non-recursive method is faster and more efficient for large inputs

A materialized view (mview) is a database object that contains the results of a query. Datapump is a tool for moving data between Oracle databases. Oracle GoldenGate is a real-time data integration and replication tool.

• Materialized views (mviews) store the results of a query for faster access.

• Datapump is a tool used for exporting and importing data between Oracle databases.

• Oracle GoldenGate is a real-time data integration and replication tool used for moving and synchronizing...read more

Different types of testing include functional testing, non-functional testing, manual testing, automated testing, and regression testing.

• Functional testing: Testing the functionality of the software against the requirements.

• Non-functional testing: Testing aspects like performance, usability, security, etc.

• Manual testing: Testing performed manually by testers without the use of automation tools.

• Automated testing: Testing performed using automation tools to execute test cases.

• R...read more

The rating process from com to Bip involves evaluating a company's creditworthiness and assigning a rating based on various factors.

• The process starts with gathering information about the company's financials, operations, and industry.

• The information is analyzed to assess the company's credit risk and financial stability.

• Based on the analysis, a rating is assigned to the company, which ranges from AAA to D.

• The rating agencies, such as S&P, Moody's, and Fitch, use different ra...read more

A copy constructor is a special type of constructor in object-oriented programming that creates a new object as a copy of an existing object.

• Creates a new object by copying the attributes of an existing object

• Used to initialize a new object with the values of an existing object

• Helps in creating deep copies of objects to avoid shallow copy issues

API Gateway in Microservices acts as a single entry point for all client requests to access multiple microservices.

• API Gateway handles authentication, authorization, load balancing, caching, and routing of requests to appropriate microservices.

• It helps in decoupling client applications from individual microservices, providing a more centralized and manageable architecture.

• Examples of API Gateways include Netflix Zuul, Amazon API Gateway, and Kong.

Normalization is the process of organizing data in a database to reduce redundancy and improve data integrity.

• Normalization involves breaking down data into smaller, more manageable tables

• It helps in reducing data redundancy by storing data in a structured manner

• Normalization ensures data integrity by avoiding update anomalies

• There are different normal forms like 1NF, 2NF, 3NF, BCNF, etc.

Inheritance is a mechanism in Java where one class acquires the properties and behaviors of another class. Reverse string means to reverse the order of characters in a given string.

• Inheritance allows for code reusability and promotes a hierarchical structure of classes.

• The subclass inherits all the properties and methods of the superclass.

• To reverse a string in Java, we can use the StringBuilder class or convert the string to a character array and swap the characters at oppos...read more

Exception handling is a mechanism to handle runtime errors in a program to prevent it from crashing.

• Exception handling is used to handle unexpected errors or exceptional conditions that may occur during program execution.

• It allows the program to gracefully recover from errors and continue executing.

• Common exception handling techniques include try-catch blocks, throw statements, and finally blocks.

• Examples of exceptions include divide by zero, file not found, and out of memory...read more

Data Driven Framework is a testing framework where test data is separated from the test script.

• Test data is stored in external files like Excel sheets or CSV files.

• Test scripts are designed to read data from these external files.

• This approach makes it easy to modify test data without changing the test script.

• It also allows for easy maintenance and scalability of test scripts.

Encapsulation is a mechanism of wrapping data and code acting on the data together as a single unit.

• Encapsulation is one of the four fundamental OOP concepts.

• It helps in achieving data hiding and abstraction.

• In Java, encapsulation is achieved through access modifiers such as private, public, and protected.

• Example: A class with private variables and public methods to access and modify those variables.

Inheritance is a mechanism in object-oriented programming where a new class is created by inheriting properties of an existing class.

• Inheritance allows code reusability and saves time and effort in writing new code.

• The existing class is called the parent or base class, and the new class is called the child or derived class.

• The child class inherits all the properties and methods of the parent class and can also add its own unique properties and methods.

• For example, a class 'An...read more

Microservices are best used when you have a large, complex application that can be broken down into smaller, independent services.

• Use microservices when you need to scale different parts of your application independently.

• Microservices are beneficial when you have multiple teams working on different services.

• They are useful when you want to adopt different technologies for different services.

• Microservices can improve fault isolation and make it easier to update and deploy indi...read more

Finding non-duplicate element in a string program.

• Iterate through the string and count the occurrence of each character.

• Return the first character with count 1.

• If no such character found, return null or -1.

Selenium is a popular automation testing tool, GIT is a version control system, MAVEN is a build automation tool, POM Framework is a design pattern for test automation.

• Selenium is used for automating web applications testing

• GIT is used for version control and collaboration in software development

• MAVEN is a build automation tool primarily used for Java projects

• POM Framework (Page Object Model) is a design pattern to create object repositories for web UI elements

Weblogic software can be installed by downloading the installer, running the installation wizard, configuring settings, and starting the server.

• Download the Weblogic software installer from the official website

• Run the installer and follow the installation wizard prompts

• Configure settings such as domain creation, server settings, and security configurations

• Start the Weblogic server to begin using the software

Memory management involves allocating and deallocating memory efficiently to optimize system performance.

• Use dynamic memory allocation functions like malloc, calloc, and realloc to allocate memory as needed

• Track memory usage and release unused memory using free function to prevent memory leaks

• Implement memory pooling or caching to reuse memory blocks and reduce overhead of frequent allocation/deallocation

• Use memory profiling tools to analyze memory usage patterns and optimize...read more

Creditworthiness can be calculated by assessing an individual's financial history, income, debt-to-income ratio, and credit score.

• Evaluate the individual's credit score, which is a numerical representation of their creditworthiness based on their credit history.

• Assess the individual's income to debt ratio to determine their ability to repay debts.

• Review the individual's financial history, including any past bankruptcies or delinquencies.

• Consider other factors such as employme...read more

Handling class imbalance involves techniques like resampling, using different algorithms, and adjusting class weights.

• Use resampling techniques like oversampling or undersampling to balance the classes.

• Utilize algorithms that are robust to class imbalance, such as Random Forest, XGBoost, or SVM.

• Adjust class weights in the model to give more importance to minority class.

• Use evaluation metrics like F1 score, precision, recall, and ROC AUC to assess model performance.

• Consider en...read more

Abstract methods in interfaces are methods without a body that must be implemented by classes that implement the interface. Default methods provide a default implementation that can be overridden.

• Abstract methods in interfaces do not have a body and must be implemented by classes that implement the interface.

• Default methods in interfaces provide a default implementation that can be overridden by implementing classes.

• Interfaces can have multiple default methods but only one ab...read more

CSS box model is a design concept that describes how elements are rendered on a web page.

• It consists of content, padding, border, and margin.

• Content is the actual element content.

• Padding is the space between the content and the border.

• Border is the line that surrounds the content and padding.

• Margin is the space between the border and the next element.

• The box model can be adjusted using CSS properties such as padding, border, and margin.

• Understanding the box model is important...read more

Different parameters in JCL include job name, job class, job priority, job card, job statement, job steps, and job disposition.

• Job name: Identifies the job to the operating system

• Job class: Specifies the class of resources the job requires

• Job priority: Determines the order in which jobs are executed

• Job card: Contains information about the job such as account number, job name, and programmer name

• Job statement: Defines the characteristics of the job

• Job steps: Individual tasks w...read more

Restoring a database using RMAN involves connecting to the target database, restoring the control file, and recovering the database.

• Connect to the target database using RMAN

• Restore the control file from a backup

• Restore the datafiles and tablespaces

• Recover the database to bring it to a consistent state

• Perform necessary checks and validations after restoration

SQL is a programming language used for managing and manipulating databases. The SELECT statement is used to retrieve data from a database.

• SQL stands for Structured Query Language

• It is used to communicate with databases to perform tasks such as querying, updating, and deleting data

• The SELECT statement is used to retrieve data from a database

• Example: SELECT * FROM table_name WHERE condition;

Permit is required for wireline to ensure safety, compliance with regulations, and coordination with other utilities.

• Permit ensures safety by verifying that the wireline installation meets all necessary standards and regulations.

• Permit helps in coordinating with other utilities to prevent interference or damage to existing infrastructure.

• Permit also ensures compliance with local regulations and environmental laws.

• Examples: FCC permit for telecommunications wireline installati...read more

Fiber optics is a technology that uses thin strands of glass or plastic to transmit data as light signals.

• Fiber optics is used in telecommunications to transmit data over long distances.

• It is also used in medical equipment, military technology, and industrial applications.

• Fiber optic cables are made up of thin strands of glass or plastic called fibers.

• These fibers are surrounded by a protective coating and bundled together to form a cable.

• Data is transmitted through the fiber...read more

RF engineers design, develop, test, and maintain radio frequency systems and components.

• Designing RF systems and components

• Developing RF technology

• Testing RF equipment

• Maintaining RF systems

• Troubleshooting RF issues

• Collaborating with other engineers and teams

Templates are a way to create generic classes or functions that can work with different data types.

• Templates allow for code reusability and reduce the need for duplicate code.

• They are commonly used in C++ for creating generic data structures like linked lists and arrays.

• Templates can also be used for creating generic functions that can work with different data types.

• Examples of templates include std::vector and std::map in C++.

• Templates can improve code efficiency and reduce ...read more

Same Origin Policy is a security feature in web browsers that restricts web pages from making requests to a different domain.

• It prevents malicious scripts from accessing sensitive data from other websites

• It applies to all web content, including JavaScript, CSS, and images

• Cross-Origin Resource Sharing (CORS) is used to bypass the Same Origin Policy

• Example: A script from www.example.com cannot access data from www.anotherdomain.com

Promises are objects that represent the eventual completion or failure of an asynchronous operation.

• Promises have 3 states: pending, fulfilled, or rejected

• Pending is the initial state when a promise is created

• Fulfilled means the operation completed successfully

• Rejected means the operation failed

• Promises can be chained using .then() and .catch() methods

PFP stands for Plenum Fiber Optic Cable. The size of fiber cable can vary depending on the application and requirements.

• PFP is a type of fiber optic cable that is designed for use in plenum spaces, which are areas used for air circulation in buildings.

• The size of fiber optic cable can range from 0.9mm to 3.0mm in diameter, depending on the number of fibers and the specific application.

• For example, a single-mode fiber optic cable typically has a diameter of 0.9mm, while a mult...read more

Terraform, Packer, and Puppet are tools used in DevOps for infrastructure automation and configuration management.

• Terraform is used for infrastructure as code and automates the provisioning of infrastructure resources.

• Packer is used for creating machine images for multiple platforms from a single source configuration.

• Puppet is used for configuration management and automates the deployment and management of software and configurations across multiple servers.

To find the second highest integer in an array, sort the array in descending order and return the second element.

• Sort the array in descending order

• Return the second element in the sorted array

• Handle edge cases like duplicates or small arrays

The lr function is used in load testing to parameterize values in scripts.

• The lr function is specific to LoadRunner, a performance testing tool.

• It allows testers to replace hard-coded values with dynamic data during script execution.

• The lr function can be used to simulate different user behaviors and data inputs.

• For example, lr_eval_string can be used to extract values from server responses and use them in subsequent requests.

Agile process refers to a set of principles and practices that prioritize flexibility, collaboration, and continuous improvement in software development.

• Agile process involves breaking down projects into smaller, manageable tasks called user stories.

• It emphasizes frequent communication and collaboration between team members, stakeholders, and customers.

• Iterations, or sprints, are used to deliver working software in short cycles, allowing for feedback and adjustments.

• Adaptabil...read more

Prototype chaining is the mechanism by which objects inherit properties and methods from their prototype.

• Every object in JavaScript has a prototype property that refers to another object.

• If a property or method is not found on an object, JavaScript looks for it in the object's prototype chain.

• Prototype chaining can be used to create inheritance in JavaScript.

• Modifying the prototype of an object affects all objects that inherit from it.

Scripted and declarative pipelines in Jenkins for DevOps Engineer role

• Scripted pipeline uses Groovy script syntax

• Declarative pipeline uses a more structured format with predefined stages

• Scripted pipeline example: node { stage('Build') { echo 'Building' } }

• Declarative pipeline example: pipeline { agent any stages { stage('Build') { steps { echo 'Building' } } } }

Association refers to a relationship between two or more objects where they are connected or linked in some way.

• Association is a fundamental concept in object-oriented programming.

• It is used to represent a relationship between two or more objects.

• The relationship can be one-to-one, one-to-many, or many-to-many.

• For example, a car has an association with its engine, as it cannot function without it.

• Another example is a student having an association with a school, as they attend...read more

Object-oriented programming paradigm in Java focusing on objects and classes.

• OOPs stands for Object-Oriented Programming.

• It focuses on creating objects that interact with each other through classes.

• Key principles include Inheritance, Encapsulation, Polymorphism, and Abstraction.

• Example: Class Car { String color; void start() { //code here } }

• Example: Car myCar = new Car(); myCar.color = 'red'; myCar.start();

Collection framework in Java provides a set of interfaces and classes to store and manipulate groups of objects.

• Includes interfaces like List, Set, and Map

• Classes like ArrayList, LinkedList, HashSet, and HashMap implement these interfaces

• Provides methods for adding, removing, and accessing elements in collections

VPC stands for Virtual Private Cloud, a virtual network dedicated to your AWS account.

• VPC allows you to create a logically isolated section of the AWS Cloud where you can launch AWS resources.

• You can define your own IP address range, create subnets, configure route tables, and network gateways within a VPC.

• VPC provides security by allowing you to control inbound and outbound traffic to and from your instances.

• You can connect your VPC to your corporate data center using an IPs...read more

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

• Pointers are used to manipulate memory directly.

• They can be used to pass large data structures to functions without copying them.

• Pointers can be used to create dynamic data structures like linked lists and trees.

• They can also be used to access hardware directly.

• Examples of pointer types include int*, char*, and void*.

Handled various stakeholders including clients, vendors, and internal teams.

• Managed client relationships and ensured customer satisfaction

• Collaborated with vendors to negotiate contracts and ensure timely delivery of goods and services

• Worked closely with internal teams such as sales, marketing, and finance to ensure smooth operations

• Handled employee relations and provided support to HR department

• Managed relationships with regulatory bodies and ensured compliance with laws and...read more

Database connection pool in Java helps manage multiple database connections efficiently.

• Use a connection pool library like HikariCP or Apache DBCP.

• Set up the pool with a maximum number of connections, timeout settings, etc.

• Acquire and release connections from the pool as needed in your Java code.

Bugs, defects, and errors are all issues in software development that can cause problems in the functionality of a program.

• A bug is a coding mistake that causes unexpected behavior in a program.

• A defect is a flaw in the design or functionality of a program.

• An error is a mistake made by a user or a program that causes the program to fail.

• All three can cause issues in the functionality of a program and need to be identified and fixed.

• Examples: A bug could be a typo in the code ...read more

DML and DDL are SQL commands for manipulating and defining database objects. To open a process in Linux, use the 'open' command.

• DML (Data Manipulation Language) is used to manipulate data in a database, such as inserting, updating, and deleting records.

• DDL (Data Definition Language) is used to define the structure and schema of a database, such as creating tables, indexes, and constraints.

• To open a process in Linux, you can use the 'open' command followed by the name of the p...read more