100+ Interview Questions and Answers

Minimum number of attempts to find the lighter ball is ceil(log2(N)) and maximum number of attempts is 3.

• Minimum attempts: ceil(log2(N))

• Maximum attempts: 3

• Condition for maximum attempts: N must be greater than or equal to 9

The task is to find the third largest element in an array of distinct integers.

• Read the number of test cases 'T'

• For each test case, read the number of elements 'N' and the array 'ARR'

• Sort the array in descending order

• Return the element at index 2 as the third largest element

The question asks to implement an AVL_TREE from scratch and insert given values into it.

• AVL_TREE is a self-balancing binary search tree

• The height difference between left and right subtrees of all nodes should not be more than one

• Implement the AVL_TREE data structure and insertion algorithm

• Return the root of the AVL_TREE after inserting all the nodes

The correct SQL query to select the top 5 numbers from the given data is 'SELECT TOP 5 number FROM table_name ORDER BY number DESC'.

• Use the 'SELECT' statement to specify the columns you want to retrieve.

• Use the 'TOP' keyword followed by the number of rows you want to select.

• Specify the column name in the 'ORDER BY' clause to sort the data in descending order.

To create a table in SQL, use the CREATE TABLE statement and define its elements.

• Use CREATE TABLE statement followed by table name

• Define columns with data types and constraints

• Add primary key constraint to uniquely identify each row

• Example: CREATE TABLE customers (id INT PRIMARY KEY, name VARCHAR(50), email VARCHAR(50))

Write a query to select data from a large collection.

• Use the SELECT statement to specify the columns you want to retrieve.

• Use the FROM clause to specify the table or tables from which to retrieve the data.

• Use the WHERE clause to specify any conditions that the retrieved data must meet.

• Use the ORDER BY clause to sort the retrieved data in a specific order.

• Use the LIMIT clause to limit the number of rows returned, if necessary.

JOIN operation is used to combine rows from two or more tables based on a related column between them.

• JOIN can be used with different types like INNER, LEFT, RIGHT, FULL OUTER, etc.

• Example: SELECT * FROM table1 INNER JOIN table2 ON table1.column = table2.column;

• JOIN can be used to fetch data from multiple tables in a single query.

Bubble sort repeatedly swaps adjacent elements if they are in wrong order.

• Bubble sort has a time complexity of O(n^2).

• It is not efficient for large datasets.

• Optimizations include adding a flag to check if any swaps were made in a pass and stopping if none were made.

• Another optimization is to keep track of the last swapped index and only iterate up to that index in the next pass.

Set is a collection of unique elements, List is an ordered collection of elements, and Map is a collection of key-value pairs.

• Set does not allow duplicates, e.g. a set of integers {1, 2, 3, 4, 5}

• List maintains the order of elements, e.g. a list of names ['John', 'Mary', 'Bob']

• Map stores key-value pairs, e.g. a map of phone numbers {'John': '123-456-7890', 'Mary': '987-654-3210'}

Code to count the number of occurrences of each alphabet in a string using HashMap and triggers.

• Create a HashMap to store the count of each alphabet in the string.

• Iterate through the string and update the count in the HashMap.

• Handle both uppercase and lowercase alphabets by converting them to a consistent case.

• Use triggers to update the HashMap whenever a new alphabet is encountered.

To train a beginner in Java, start with basic concepts and gradually introduce programming concepts.

• Start with basic concepts like data types, variables, and operators

• Introduce control structures like if-else statements and loops

• Teach object-oriented programming concepts like classes and objects

• Encourage practice and experimentation with simple programs

• Provide resources like online tutorials and exercises

• Offer guidance and feedback on their code

We selected technologies based on project requirements, team expertise, scalability, and cost-effectiveness.

• Considered project requirements and objectives

• Leveraged team expertise in certain technologies

• Chose scalable technologies for future growth

• Evaluated cost-effectiveness of different options

Main method is static because it needs to be called without creating an instance of the class.

• Static methods can be called without creating an instance of the class

• Main method is the entry point of the program

• Main method must have a specific signature: public static void main(String[] args)

• args is an array of strings that can be used to pass command line arguments to the program

Finding the Kth largest element in an array.

• Sort the array in descending order and return the Kth element.

• Use a max heap to find the Kth largest element.

• Use quickselect algorithm to find the Kth largest element.

Java is a popular programming language used for developing various applications.

• Java is an object-oriented language

• It is platform-independent

• Java code is compiled into bytecode

• Java has a vast library of pre-built classes and functions

• Java is used for developing web applications, mobile apps, desktop applications, and more

Swap two numbers without using two variables

• Use arithmetic operations like addition and subtraction

• Example: Swap 3 and 5 - 3 = 3 + 5, 5 = 8 - 5, 3 = 8 - 3

Microservices are a software architecture approach where applications are built as a collection of small, independent services.

• Advantages include increased scalability, flexibility, and resilience

• Each service can be developed, deployed, and scaled independently

• Allows for easier maintenance and updates

• Basic architecture involves breaking down a monolithic application into smaller, self-contained services

• Services communicate with each other through APIs

Balanced Parenthesis using Stack is a problem to check if the given expression has balanced parentheses or not.

• Create an empty stack

• Traverse the expression string and for each character, check if it is an opening parenthesis

• If it is an opening parenthesis, push it onto the stack

• If it is a closing parenthesis, check if the stack is empty or if the top element of the stack is the corresponding opening parenthesis

• If the stack is empty or the top element is not the corresponding ...read more

A prime number is a number greater than 1 that has no positive divisors other than 1 and itself.

• Check if the number is greater than 1.

• Iterate from 2 to the square root of the number and check if it divides the number evenly.

• If no divisor is found, the number is prime.

SDLC life cycle is a process used by software development teams to design, develop, and test high-quality software.

• SDLC stands for Software Development Life Cycle

• It includes phases like planning, analysis, design, implementation, testing, and maintenance

• Each phase has specific goals and deliverables to ensure the successful completion of the project

• Examples of SDLC models include Waterfall, Agile, and DevOps

To develop a Spring Boot application, follow these steps:

• Create a new Spring Boot project using Spring Initializr

• Define the necessary dependencies in the pom.xml file

• Create the necessary Java classes and packages

• Define the application properties in the application.properties file

• Run the application using the Spring Boot Maven plugin or by running the main class

• Test the application using a web browser or a REST client

JDK is a development kit, JRE is a runtime environment, and JVM is a virtual machine that executes Java code.

• JDK includes JRE and development tools

• JRE includes JVM and necessary libraries

• JVM interprets compiled Java code into machine code

• JDK is needed for developing Java applications

• JRE is needed for running Java applications

• Multiple JVMs can run on a single machine

An operating system is a software that manages computer hardware and software resources.

• It acts as an interface between the user and the computer hardware.

• It manages memory, processes, and input/output devices.

• Examples include Windows, macOS, and Linux.

• It provides a platform for other software to run on.

• It ensures security and manages user accounts.

Program to check if a number is prime or not.

• A prime number is only divisible by 1 and itself.

• Loop through numbers from 2 to n-1 and check if n is divisible by any of them.

• If n is divisible by any number, it is not prime.

• If n is not divisible by any number, it is prime.

Derivative market is a financial market where contracts are traded whose value is derived from an underlying asset.

• Derivatives include options, futures, forwards, and swaps.

• Investors use derivatives to hedge risk or speculate on price movements.

• Derivative market helps in price discovery and liquidity in the market.

• Example: A farmer can use a futures contract to lock in a price for his crops before harvest.

Inheritance in Java allows a class to inherit properties and behavior from another class.

• Inheritance enables code reusability and promotes a hierarchical relationship between classes.

• Subclasses inherit attributes and methods from a superclass.

• Java supports single and multiple inheritance through classes and interfaces.

• Example: class Car extends Vehicle {}

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

• HashMap uses a hash function to map keys to indices in an array.

• It allows for constant-time retrieval, insertion, and deletion of key-value pairs.

• Collisions can occur when multiple keys map to the same index, which is resolved using techniques like chaining or open addressing.

OOP concepts refer to the principles of Object-Oriented Programming, including encapsulation, inheritance, and polymorphism.

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

• Inheritance: allows a class to inherit properties and behavior from another class

• Polymorphism: the ability for objects of different classes to respond to the same method call in different ways

Use SQL query with ORDER BY and LIMIT to find 4th highest salary

• Use ORDER BY clause to sort salaries in descending order

• Use LIMIT 1 OFFSET 3 to get the 4th highest salary

• Example: SELECT salary FROM employees ORDER BY salary DESC LIMIT 1 OFFSET 3

Comparator is used to define custom sorting order for objects, while Comparable is an interface used to implement natural ordering of objects.

• Comparator is used to define custom sorting order for objects, while Comparable is used to implement natural ordering of objects

• Comparator interface has a compare() method, while Comparable interface has a compareTo() method

• Comparator can be used to sort objects based on multiple criteria, while Comparable can only be used for single cr...read more

Fibonacci sequence pseudocode

• Start with two variables set to 0 and 1

• Loop through desired number of times, adding previous two numbers to get next number

• Store each number in an array

INDEX and PARTITION are database optimization techniques that improve query performance.

• INDEX is a data structure that improves the speed of data retrieval operations on a database table.

• PARTITION is a technique that divides a large table into smaller, more manageable parts.

• INDEX and PARTITION can be used together to further improve query performance.

• Examples of INDEX include B-tree, hash, and bitmap indexes.

• Examples of PARTITION include range, list, and hash partitioning.

Equity market refers to the market where shares of companies are issued and traded.

• Equity market is also known as stock market.

• Investors buy and sell shares of publicly traded companies in the equity market.

• Prices of shares in the equity market are determined by supply and demand.

• Equity market provides companies with a way to raise capital by issuing shares to investors.

• Major stock exchanges like NYSE and NASDAQ are examples of equity markets.

OOPs stands for Object-Oriented Programming concepts which include encapsulation, inheritance, polymorphism, and abstraction.

• Encapsulation: Bundling data and methods that operate on the data into a single unit (object).

• Inheritance: Ability of a class to inherit properties and behavior from another class.

• Polymorphism: Ability to present the same interface for different data types.

• Abstraction: Hiding the complex implementation details and showing only the necessary features of ...read more

An application for personal finance management

• Tracks income and expenses

• Creates budgets and financial goals

• Provides investment advice

• Generates reports and visualizations

• Helps users save money and reduce debt

Palindrome pseudocode for array of strings

• Iterate through each string in the array

• For each string, compare the characters from start to end and end to start

• If all characters match, it is a palindrome

The 4 pillars of OOPS are Inheritance, Encapsulation, Abstraction, and Polymorphism.

• Inheritance allows a class to inherit properties and behavior from another class.

• Encapsulation refers to the bundling of data with the methods that operate on that data.

• Abstraction focuses on hiding the implementation details and showing only the necessary features of an object.

• Polymorphism allows objects to be treated as instances of their parent class.

I have experience with Jenkins, Git, Docker, and Kubernetes for building and deploying microservices.

• I have used Jenkins for continuous integration and continuous deployment

• I have used Git for version control and managing code changes

• I have used Docker for containerization and packaging of microservices

• I have used Kubernetes for container orchestration and scaling

• I plan a pipeline by defining stages for building, testing, and deploying microservices

• I use tools like Jenkinsfil...read more

Print a specific pattern using any programming language.

• Use nested loops to print the pattern

• Increment the number of asterisks in each row until the middle row, then decrement

• Print each row as a separate line

EXIST checks for the existence of a value in a subquery, while IN checks for the existence of a value in a list.

• EXIST is used with a subquery, while IN is used with a list of values.

• EXIST returns true if the subquery returns any rows, while IN returns true if the value is found in the list.

• EXIST is more efficient for large datasets, while IN is more efficient for small datasets.

• Example: SELECT * FROM table1 WHERE column1 EXIST (SELECT column2 FROM table2 WHERE column3 = 'valu...read more

I have worked on data science projects involving customer segmentation, predictive analytics, and recommendation systems.

• Developed a customer segmentation model using clustering algorithms to identify different customer groups based on behavior and demographics.

• Built predictive analytics models to forecast sales and customer churn, helping the company make data-driven decisions.

• Implemented recommendation systems using collaborative filtering techniques to personalize product ...read more

I have intermediate coding skills in Python and SQL, which I have used to automate tasks and analyze data.

• Intermediate level in Python and SQL

• Used Python to automate repetitive tasks, such as data cleaning and analysis

• Utilized SQL to query databases and extract relevant information

I would approach creating an environment modeling financial transaction simulator by first understanding the key components and variables involved.

• Research existing financial transaction simulators to understand best practices and common features

• Identify the key variables and parameters that need to be modeled in the simulator (e.g. transaction types, frequency, amounts)

• Develop a data model that accurately represents the relationships between these variables

• Create a user-frie...read more

Loan interest can be identified by examining the terms of the loan agreement and calculating the interest rate applied to the principal amount.

• Identify the stated interest rate in the loan agreement

• Calculate the interest amount by multiplying the principal amount by the interest rate and the time period

• Consider any additional fees or charges that may affect the total interest paid

I don't have the available data.

Factory pattern creates objects without exposing the instantiation logic to the client.

• Create an interface or abstract class for the product

• Create concrete classes implementing the same interface/abstract class

• Create a factory class that returns the product

• Client uses the factory to create the object

Load balancing and messaging are crucial for scalability and reliability in microservices architecture.

• Load balancing ensures even distribution of traffic among multiple instances of a service.

• Messaging enables asynchronous communication between microservices.

• Load balancing can be achieved through software or hardware solutions like NGINX, HAProxy, or AWS ELB.

• Messaging can be implemented using message brokers like RabbitMQ, Apache Kafka, or AWS SQS.

• Load balancing and messagin...read more

To print the characters of my name which are not repetitive, I would iterate through each character and only print those that appear once.

• Iterate through each character in the name

• Check if the character appears only once in the name

• Print the character if it is not repetitive

Swapping two numbers without using a third variable in a program.

• Use arithmetic operators to swap the values of two variables.

• Add the values of both variables and store the result in the first variable.

• Subtract the second variable's value from the first variable's value to get the original value of the second variable.

• Subtract the original value of the second variable from the first variable's value to get the original value of the first variable.

C++ supports multiple inheritance, Java supports single inheritance. C++ has pointers, Java has references.

• C++ supports multiple inheritance, Java supports single inheritance

• C++ has pointers, Java has references

• C++ does not have built-in garbage collection, Java has automatic garbage collection

Yes, reinforcement learning is a type of machine learning where an agent learns to make decisions by receiving rewards or punishments.

• Reinforcement learning is a type of machine learning where an agent learns to make decisions by receiving rewards or punishments.

• It involves learning a series of actions that lead to the maximum reward in a given situation.

• Examples include training a computer program to play games like chess or Go, where the program learns from its wins and los...read more

Oracle DB Architecture is a multi-layered design consisting of physical, logical, and memory structures.

• Physical layer includes data files, redo logs, and control files

• Logical layer includes tablespaces, schema objects, and segments

• Memory structures include SGA and PGA

• Oracle uses a client-server architecture with a listener process

• Oracle also supports RAC (Real Application Clusters) for high availability and scalability

Removing duplicates using analytical functions in SQL

• Use the ROW_NUMBER() function to assign a unique number to each row

• Partition the data by the columns that define duplicates

• Order the data by the same columns

• Filter out rows with a row number greater than 1

Programs to check for palindrome and sum of prime numbers.

• For palindrome, reverse the string and compare with original string.

• For sum of prime numbers, iterate through numbers and check for prime, then add to sum.

• Use functions to make code modular and reusable.

• Consider edge cases like empty string or negative numbers for sum of prime numbers.

Two classic puzzles - Defective weight and Different hat problem.

• Defective weight: Find the odd weight among a set of weights using a balance scale.

• Different hat problem: A group of people wearing hats of different colors must guess their own hat color based on the colors they see on others' hats.

• Both puzzles require logical reasoning and deduction skills.

• Defective weight example: Given 8 identical-looking balls, one of which is heavier than the others, find the odd ball usin...read more

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

• Hashmap uses a hash function to map keys to indices in an array.

• It allows for constant time complexity O(1) for insertion, deletion, and retrieval operations.

• Collisions can occur when multiple keys map to the same index, which can be resolved using techniques like chaining or open addressing.

• Example: HashMap map = new HashMap<>(); map.put("key1", 1); int value = map...read more

Yes, I know multiple programming languages.

• I am proficient in Java and Python.

• I have also worked with C++ and JavaScript.

• I am currently learning Ruby and Swift.

Using associate rule mining to find patterns in data

• Associate rule mining is a technique used to discover interesting relationships or patterns in large datasets

• It is commonly used in market basket analysis to find associations between items purchased together

• The output of associate rule mining is a set of rules in the form of IF-THEN statements

• Support and confidence are two important measures used in associate rule mining

• Support measures the frequency of occurrence of an ite...read more

Fundamentals of Oracle DB and Architecture

• Oracle Database is a relational database management system (RDBMS)

• It uses SQL (Structured Query Language) for querying and managing data

• Consists of physical and logical structures like data files, tablespaces, and schemas

• Architecture includes components like instance, memory structures, and background processes

Data characters in SQL refer to the type of data that can be stored in a column, such as text, numbers, or dates.

• Data characters in SQL are used to define the type of data that can be stored in a column

• Examples of data characters include VARCHAR for text, INT for integers, and DATE for dates

• Data characters help ensure data integrity and optimize storage space

Collection framework in Java is a set of classes and interfaces that provide a standard way to store and manipulate groups of objects.

• Collection framework includes interfaces like List, Set, and Map, along with their respective implementations like ArrayList, HashSet, and HashMap.

• It provides methods to add, remove, and access elements in a collection, as well as perform operations like sorting and searching.

• Collections class provides utility methods like sorting, searching, a...read more

AI, Cloud, and Blockchain are technologies revolutionizing the financial industry with automation, scalability, and security.

• AI: Used for fraud detection, customer service chatbots, and personalized financial recommendations.

• Cloud: Enables secure storage and access to financial data from anywhere, reducing infrastructure costs.

• Blockchain: Provides transparent and immutable record-keeping for transactions, improving security and trust in financial processes.

Design a voting system for a university

• Identify the type of voting system required (e.g. electronic, paper-based)

• Determine the scope of the voting system (e.g. student council elections, faculty senate votes)

• Establish eligibility criteria for voters and candidates

• Create a secure and anonymous voting process

• Implement a system for vote counting and result reporting

Loan life cycle refers to the stages a loan goes through from application to repayment.

• Loan application: Borrower applies for a loan.

• Loan approval: Lender reviews application and approves loan.

• Loan disbursement: Lender provides funds to borrower.

• Loan repayment: Borrower makes scheduled payments to repay the loan.

• Loan closure: Borrower repays the full loan amount and loan is closed.

• Example: A borrower applies for a mortgage, gets approved, receives funds, makes monthly payment...read more

Transaction management in microservices is crucial for ensuring data consistency and integrity.

• Each microservice should have its own database to manage transactions independently.

• Use distributed transactions or two-phase commit protocol to ensure atomicity across multiple microservices.

• Implement compensating transactions to handle failures and rollbacks.

• Consider using event-driven architecture to decouple services and improve scalability.

• Use a centralized logging and monitori...read more

Distributed tracing is a technique used to monitor and debug microservices architecture.

• It involves tracking requests as they flow through multiple services

• Each service adds its own trace information to the request

• This allows for easy identification of performance bottlenecks and errors

• Tools like Zipkin and Jaeger can be used for distributed tracing

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 error occurs.

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

• Catch block is used to handle the exception and provide a specific response.

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

• Example: try { // code that might throw exception } catch (Exception e) { // han...read more

A database is a structured collection of data that can be accessed, managed, and updated easily.

• A database stores data in tables with rows and columns.

• It allows for efficient data retrieval and manipulation.

• Examples include MySQL, Oracle, and MongoDB.

Code for 10^n amount

• In Java: Math.pow(10, n)

• In Python: 10**n

• In C++: pow(10, n)

• In JavaScript: Math.pow(10, n)

• In Ruby: 10**n

Creating a microservice involves designing and implementing a small, independent service that performs a specific function.

• Identify the specific function or business logic that the microservice will handle

• Design the API endpoints and data models for the microservice

• Implement the microservice using a framework like Spring Boot or Node.js

• Test the microservice thoroughly to ensure it functions correctly

• Deploy the microservice to a containerized environment like Docker

Mapping an account involves identifying key stakeholders, their roles, and their needs to create a plan for engagement.

• Identify key decision makers and influencers within the account

• Understand their roles and responsibilities

• Determine their pain points and needs

• Develop a plan for engagement and communication

• Regularly review and update the account map

JAVA API provides various classes and methods to handle data effectively.

• Use classes like BufferedReader, FileReader, and Scanner to read data from files.

• Use classes like BufferedWriter, FileWriter, and PrintWriter to write data to files.

• Use classes like ArrayList and HashMap to store and manipulate data in memory.

• Use classes like ResultSet and PreparedStatement to interact with databases.

• Use classes like JsonParser and JsonGenerator to handle JSON data.

• Use classes like Ciphe...read more

Performance issues in a project can arise due to various reasons.

• Identify the root cause of the issue

• Analyze the impact of the issue on the project timeline and budget

• Implement corrective actions to resolve the issue

• Monitor the performance regularly to avoid future issues

OTBI report stands for Oracle Transactional Business Intelligence report, used for analyzing and reporting on data in Oracle Cloud applications.

• OTBI reports provide real-time insights into business operations

• Users can create custom reports using OTBI subject areas

• OTBI reports can be scheduled for automated delivery

• OTBI reports can be accessed through Oracle Cloud applications such as ERP Cloud, HCM Cloud, and CX Cloud

BI report stands for Business Intelligence report, which is a document that presents data analysis and insights to help make informed business decisions.

• BI report is a document that provides insights and analysis on business data.

• It helps in making informed decisions by presenting key metrics and trends.

• BI reports often include visualizations such as charts and graphs to make data easier to understand.

• Examples of BI reports include sales performance reports, marketing campaig...read more

Reverse the characters of words in a string

• Split the string into an array of words

• Reverse each word in the array

• Join the reversed words back into a single string

Mainframe is a large, powerful, and centralized computer system typically used by large organizations for critical applications.

• Mainframes are known for their reliability, security, and scalability.

• They are often used for processing large amounts of data and running mission-critical applications.

• Mainframes have been around since the 1950s and are still used by industries like banking, healthcare, and government.

• Examples of mainframe operating systems include IBM z/OS, z/VM, a...read more

Core banking refers to the basic banking functions such as deposits, loans, and payments that are essential for a bank's operations.

• Core banking systems are the software and hardware used by banks to process transactions and manage customer accounts.

• These systems typically include modules for customer information, accounts, loans, deposits, and payments.

• Core banking systems help banks streamline their operations, improve efficiency, and provide better customer service.

• Example...read more

ANSI JOINS are standard SQL joins while Oracle JOINS are specific to Oracle database.

• ANSI JOINS are supported by most relational databases while Oracle JOINS are specific to Oracle.

• ANSI JOINS use keywords like INNER JOIN, LEFT JOIN, RIGHT JOIN, etc. while Oracle JOINS use symbols like (+) for outer joins.

• ANSI JOINS are more portable and easier to migrate to other databases while Oracle JOINS are more efficient in Oracle database.

• ANSI JOINS are preferred for cross-platform com...read more

A cross section of a road is a diagram that shows the different layers of materials used in the construction of a road.

• A cross section typically includes the road surface, subgrade, base course, and any drainage features.

• The thickness and composition of each layer can vary depending on factors such as traffic volume and climate.

• Cross sections are important for designing and maintaining roads to ensure they are safe and durable.

• Examples of materials used in road construction i...read more

DBMS in Oracle stands for Database Management System, which is a software that manages the storage, retrieval, and organization of data in a database.

• DBMS in Oracle is a software system that allows users to define, create, maintain, and control access to the database.

• It provides an interface for users to interact with the database and perform various operations like querying, updating, and managing data.

• Oracle Database is a popular DBMS that offers features such as data secur...read more

Oracle database architecture consists of memory structures, background processes, and physical files.

• Oracle database has a shared memory architecture

• Memory structures include SGA and PGA

• Background processes include PMON, SMON, DBWR, LGWR, etc.

• Physical files include data files, control files, redo log files, etc.

• expdp is a utility used for exporting data from an Oracle database

To connect a database to Java, you need to use JDBC (Java Database Connectivity) API.

• Import JDBC library in your Java project

• Load the database driver using Class.forName() method

• Establish a connection to the database using DriverManager.getConnection() method

• Create a statement object to execute SQL queries

• Execute SQL queries and process the results

We are using the Page Object Model framework in our current project.

• Page Object Model helps in creating reusable and maintainable code by separating the page elements and their actions into separate classes.

• It improves test maintenance and reduces code duplication.

• Example: We have separate classes for each page in our application, containing locators and methods to interact with those elements.

An entity in Spring Boot represents a table in a database and is used to map data from the database to Java objects.

• Entities are typically annotated with @Entity and represent a table in a database.

• Fields in an entity class represent columns in the database table.

• Entities can have relationships with other entities using annotations like @OneToOne, @OneToMany, @ManyToOne, @ManyToMany.

• Entities are managed by the EntityManager in Spring Boot for CRUD operations.

• Example: @Entity ...read more

A global resource is a resource that is available to all users or systems within a network or organization.

• Global resources can include shared files, databases, printers, and software applications.

• These resources are typically accessible from any location within the network.

• Examples of global resources include a shared network drive, a centralized database server, and a cloud-based collaboration tool.

Memory leak is a situation where a program fails to release memory it has allocated, leading to a gradual loss of available memory.

• Memory leaks occur when a program allocates memory but does not free it after use.

• This can lead to a gradual increase in memory usage over time, potentially causing the program to slow down or crash.

• Common causes of memory leaks include improper memory management in languages like C or C++.

• Tools like Valgrind can help detect memory leaks in progra...read more

Pattern programs in PHP involve printing a specific pattern using loops and conditional statements.

• Use nested loops to print the desired pattern

• Utilize conditional statements to control the pattern output

• Experiment with different loop structures to achieve various patterns

Laravel language uses PHP as its programming language.

• Laravel is a PHP framework

• Uses PHP syntax and features

• Follows MVC architecture

• Provides built-in features like authentication, routing, and sessions

An enumerator is a type that allows you to iterate through a collection of items, such as an array or list.

• Enumerators are commonly used in programming languages like C# to loop through collections of data.

• They typically have methods like MoveNext() to move to the next item in the collection and Current to access the current item.

• Enumerators can be used in foreach loops to easily iterate through all items in a collection.

Merge sort is a divide-and-conquer algorithm that sorts an array by dividing it into two halves, sorting each half, and merging them.

• Divide the array into two halves

• Sort each half recursively

• Merge the sorted halves

• Time complexity is O(n log n)

• Space complexity is O(n)