600+ Ergode IT Services Interview Questions and Answers

Fast Formulas in Oracle HCM Cloud are used for complex calculations and validations.

• Fast Formulas are used in Oracle HCM Cloud to calculate elements like earnings, deductions, and benefits.

• They can be used to define eligibility criteria for elements.

• Fast Formulas can also be used for complex validations and conditions in payroll processing.

• Examples include calculating overtime pay based on specific criteria, determining bonus amounts based on performance ratings, and validati...read more

Lists are mutable, ordered collections of items, while tuples are immutable, ordered collections of items.

• Lists are defined using square brackets [], while tuples are defined using parentheses ().

• Lists can be modified after creation (mutable), while tuples cannot be modified (immutable).

• Lists are typically used for collections of similar items that may need to be changed, while tuples are used for fixed collections of items.

• Example: list_example = [1, 2, 3] and tuple_example ...read more

Implement two stacks using a single array without extra space.

• Divide the array into two halves and use one half for each stack.

• Keep track of the top of each stack separately.

• Handle stack overflow and underflow conditions.

• Example: Implementing two stacks for undo and redo operations in a text editor.

Abstract class can have implementation while interface cannot. Classes can implement multiple interfaces but only one abstract class.

• Abstract class can have constructors while interface cannot.

• Abstract class can have non-abstract methods while interface cannot.

• Interfaces are used for full abstraction while abstract classes are used for partial abstraction.

• Example: Abstract class - Animal with method eat() and subclass Dog with implementation. Interface - Runnable with method ...read more

Find missing and repeating numbers in a group of billions of numbers without extra space.

• Use bitwise XOR to find the missing number

• Use modulo and division to find the repeating number

• Divide the numbers into smaller chunks to avoid memory overflow

To solve question 1 with O(n) time complexity, iterate through the array once. To solve with O(logn) time complexity, use binary search.

• For O(n) time complexity, iterate through the array once and perform the required operations.

• For O(logn) time complexity, use binary search to find the desired element or perform the required operations.

• O(n) time complexity is generally faster than O(logn) time complexity for smaller input sizes, while O(logn) is faster for larger input sizes...read more

To find the maximum salary in emp table, use the MAX function on the salary column.

• Use the MAX function in SQL to find the highest value in a column

• Specify the column name after the MAX function, in this case 'salary'

• Example: SELECT MAX(salary) FROM emp

• This will return the highest salary value in the emp table

Constraints in SQL are rules that are enforced on columns or tables to ensure data integrity and consistency.

• Constraints ensure data accuracy and reliability.

• Common constraints include NOT NULL, UNIQUE, PRIMARY KEY, FOREIGN KEY, and CHECK.

• NOT NULL constraint ensures a column cannot have a NULL value.

• UNIQUE constraint ensures that all values in a column are unique.

• PRIMARY KEY constraint uniquely identifies each record in a table.

• FOREIGN KEY constraint establishes a relationshi...read more

TCP is a connection-oriented protocol that provides reliable data delivery, while UDP is a connectionless protocol that offers faster but less reliable data transmission.

• TCP is reliable as it ensures all data packets are received in order and retransmits any lost packets.

• UDP is faster as it does not establish a connection before sending data and does not guarantee delivery of packets.

• TCP is used for applications that require high reliability and accuracy, such as web browsing...read more

Java is an object-oriented programming language that is platform-independent and has automatic memory management.

• Java is platform-independent, while C++ is platform-dependent.

• Java has automatic memory management, while C++ requires manual memory management.

• Java is an object-oriented language, while C++ supports both procedural and object-oriented programming.

• Java has a simpler syntax than C++.

• Java has a larger standard library than C++.

• Java is used for developing web applicat...read more

Design a scalable database to handle user requests during peak hours in a university setting.

• Implement load balancing to distribute user requests evenly across servers.

• Use caching mechanisms to reduce database load and improve response times.

• Optimize database queries and indexes to improve performance during peak hours.

• Consider sharding or partitioning the database to distribute data across multiple servers.

• Implement failover mechanisms to ensure high availability during peak...read more

ER diagrams are used to visualize and design relational databases.

• ER diagrams show the relationships between entities in a database

• They help in identifying the attributes of each entity

• They aid in designing the structure of a database

• ER diagrams are commonly used in software development

Expected Credit Loss (ECL) is a measure of the potential loss that a financial institution may incur due to default or impairment of its credit exposures.

• ECL is a key concept in financial accounting and reporting.

• It is used to estimate the amount of credit losses that a financial institution is likely to experience in the future.

• The two methods prescribed by the Standard are the General Approach and the Simplified Approach.

• Under the General Approach, financial institutions ar...read more

Routing in MVC pattern is handled by a routing engine which maps incoming URLs to specific controller actions.

• Routing is the process of matching incoming URLs to specific controller actions in the MVC pattern.

• Routes are defined in a routing table which maps URLs to corresponding controller actions.

• The routing engine uses the routing table to determine which controller and action should handle a particular request.

• Routes can include placeholders for dynamic segments of the URL...read more

Filters in MVC are components that allow pre-processing and post-processing of requests and responses.

• Filters are used to perform common functionalities like logging, authentication, authorization, etc.

• They can be applied globally to all controllers or selectively to specific controllers or actions.

• Examples of filters include Authorization filters, Action filters, Result filters, and Exception filters.

Creating two threads and synchronizing them in a multi-threaded example.

• Create two threads using the Thread class in Java.

• Implement the run() method for each thread.

• Use synchronized keyword to ensure thread safety.

• Example: Thread t1 = new Thread(new MyRunnable()); t1.start();

• Example: Thread t2 = new Thread(new MyRunnable()); t2.start();

Merge and remove duplicates from two sorted arrays without using Collections

• Use two pointers to iterate through both arrays simultaneously

• Compare elements at each pointer and add the smaller one to the result array

• Skip duplicates by checking if the current element is equal to the previous element

Singleton design pattern ensures a class has only one instance and provides a global point of access to it.

• Ensure a private static instance variable in the class.

• Provide a public static method to access the instance, creating it if necessary.

• Use synchronized keyword or double-checked locking to make it thread-safe.

To check ports in Solaris or Linux machine, use the netstat command.

• Open the terminal and type 'netstat -an' to display all open ports.

• Use 'netstat -an | grep ' to check if a specific port is open.

• To check listening ports, use 'netstat -an | grep LISTEN'.

• For Solaris, use 'netstat -an | grep .' instead of '| grep '.

Deferred revenue is income received in advance for goods or services that will be delivered in the future. Accrued revenue is income earned but not yet received.

• Deferred revenue is a liability on the balance sheet.

• It represents revenue that has been received but not yet earned.

• Examples of deferred revenue include prepaid subscriptions, advance payments for services, or gift cards.

• Accrued revenue is an asset on the balance sheet.

• It represents revenue that has been earned but n...read more

JVM is an abstract machine that executes Java bytecode. It consists of class loader, runtime data area, and execution engine.

• JVM stands for Java Virtual Machine.

• It is responsible for executing Java bytecode.

• JVM architecture consists of class loader, runtime data area, and execution engine.

• Class loader loads the class files into the memory.

• Runtime data area is divided into method area, heap, and stack.

• Execution engine executes the bytecode.

• JVM provides platform independence to...read more

Functional interfaces are interfaces with only one abstract method. There are four types of functional interfaces.

• Consumer: accepts a single argument and returns no result. Example: Consumer

• Supplier: takes no argument and returns a result. Example: Supplier

• Predicate: takes a single argument and returns a boolean. Example: Predicate

• Function: takes a single argument and returns a result. Example: Function

Remove duplicates from array of strings while maintaining original order.

• Iterate through the array and use a Set to keep track of unique elements.

• Add elements to a new array only if they are not already in the Set.

Circular doubly linked list is a data structure where each node has a reference to both the next and previous nodes, forming a circular loop.

• Create a Node class with data, next, and prev pointers

• Implement operations like insert, delete, search, and display

• Ensure the last node's next pointer points to the first node and the first node's prev pointer points to the last node

Searching and sorting algorithms are essential in programming for efficiently organizing and retrieving data.

• Searching algorithms: linear search, binary search, depth-first search, breadth-first search

• Sorting algorithms: bubble sort, selection sort, insertion sort, merge sort, quick sort

• Examples: Searching for a specific item in a list, sorting a list of numbers in ascending order

To delete a head node from a linked list without the head node given, we need to traverse the list.

• Traverse the list until we find the node whose next node is the head node.

• Make the next node of that node as the new head node.

• Delete the original head node.

Towers of Hanoi is a classic problem of moving disks from one peg to another with specific rules.

• The problem involves three pegs and a number of disks of different sizes.

• The goal is to move all the disks from the first peg to the third peg, while following the rules.

• The rules are: only one disk can be moved at a time, a larger disk cannot be placed on top of a smaller disk, and all disks must be moved to the third peg.

• The solution can be implemented recursively.

• Example code: ...read more

Iterator is a design pattern that allows sequential access to elements, while generator is a function that can pause and resume execution.

• Iterator is an object that provides a way to access elements of a collection sequentially.

• Generator is a function that can yield multiple values one at a time, allowing it to pause and resume execution.

• Iterators are used in loops to iterate over collections like arrays, while generators are used to create iterable sequences.

Explanation of three normalizations with examples

• First Normal Form (1NF): Eliminate duplicate data and create separate tables for related data

• Example: A table with customer information and their orders should be split into two tables

• Second Normal Form (2NF): Ensure non-key attributes are dependent on the primary key

• Example: A table with customer information and their orders should have separate tables for customer and order details

• Third Normal Form (3NF): Eliminate transitive...read more

Setting up a pipeline for a build process using Concourse

• Create a pipeline configuration file in YAML format

• Define jobs, resources, and tasks in the configuration file

• Set up a Concourse server and target it with the fly CLI tool

• Upload the pipeline configuration file to the Concourse server using fly set-pipeline command

• Unpause the pipeline to start the build process

Linear progression is a constant rate of change, while non-linear progression involves varying rates of change.

• Linear progression follows a straight line or a constant slope.

• Non-linear progression does not follow a straight line and has varying rates of change.

• Examples of linear progression include simple interest growth, while examples of non-linear progression include exponential growth.

• Linear progression can be represented by equations like y = mx + b, while non-linear pro...read more

Finding the Kth element after merging two sorted arrays.

• Merge the two sorted arrays into a single array.

• Sort the merged array.

• Return the Kth element from the merged and sorted array.

Scan VIP is used for load balancing traffic to multiple nodes, while Node VIP is assigned to a specific node for direct access.

• Scan VIP is a virtual IP address used for load balancing traffic across multiple nodes in a cluster.

• Node VIP is a virtual IP address assigned to a specific node in the cluster for direct access.

• Scan VIP is typically used for services that need to be highly available and distributed across multiple nodes.

• Node VIP is used when direct access to a specifi...read more

Find duplicates in an array

• Iterate through the array and compare each element with the rest of the elements

• Use a hash table to keep track of the frequency of each element

• Sort the array and compare adjacent elements

• Use a set to keep track of unique elements and add duplicates to another set

Key components and considerations for low-level design in a healthcare system

• Identifying the different modules and components of the system such as patient management, appointment scheduling, billing, etc.

• Defining the interactions between these components and how data flows between them

• Ensuring data security and privacy measures are in place to protect sensitive patient information

• Optimizing performance and scalability to handle a large volume of data and users

• Implementing fa...read more

PLSQL packages can be written in different ways. Here are some pointers.

• Packages can be written in a single file or multiple files.

• Procedures and functions can be written inside the package or outside the package.

• Packages can be created using CREATE PACKAGE statement or CREATE OR REPLACE PACKAGE statement.

• Packages can be compiled in debug mode using the keyword 'DEBUG'.

Troubleshooting crashloop error in Kubernetes involves checking pod logs, examining resource limits, and verifying configuration files.

• Check pod logs to identify the cause of the crashloop.

• Examine resource limits to ensure the pod has enough resources to run.

• Verify configuration files for any errors or misconfigurations.

• Use kubectl commands like describe, logs, and exec to troubleshoot further.

• Consider checking for issues with persistent volumes or network connectivity.

To divide a cake into 8 parts with only 3 cuts, make two perpendicular cuts to create 4 equal pieces, then cut each of those pieces in half.

• Make a horizontal cut across the middle of the cake to create 2 equal halves.

• Make a vertical cut through the middle of the cake to create 4 equal quarters.

• Make a diagonal cut through each quarter to create 8 equal parts.

Semaphore allows multiple threads to access shared resources at the same time, while mutex allows only one thread at a time.

• Semaphore is used to control access to a resource with limited capacity, like a printer or database connection pool.

• Mutex is used to protect a shared resource from simultaneous access, like a critical section of code.

• Semaphore can have a count greater than 1, allowing multiple threads to access the resource simultaneously.

• Mutex has a binary state, either...read more

Primary and secondary ledgers are accounting books used to record financial transactions in different currencies or accounting standards.

• Primary ledger is the main accounting book used to record transactions in the company's base currency or accounting standard.

• Secondary ledger is an additional accounting book used to record transactions in a different currency or accounting standard.

• Secondary ledgers can be used for reporting purposes or to comply with local accounting regul...read more

Garbage collector in Java is a built-in mechanism that automatically manages memory by reclaiming unused objects.

• Garbage collector runs in the background to identify and delete objects that are no longer needed.

• It helps prevent memory leaks and optimize memory usage.

• Examples of garbage collectors in Java include Serial, Parallel, CMS, and G1.

Finding the longest common substring among multiple strings.

• Iterate through all substrings of the first string and check if it exists in all other strings.

• Use dynamic programming to find the longest common substring among all strings.

• If the strings are sorted, use binary search to find the common substring.

• Example: For strings 'abcdef' and 'defghij', the longest common substring is 'def'.

To test huge XML in debugger in OPA, use the 'Evaluate' feature and break down the XML into smaller parts.

• Use the 'Evaluate' feature to test the XML in smaller parts

• Break down the XML into smaller parts to make it easier to test

• Use the 'Watch' feature to monitor variables and their values

• Use the 'Step Into' and 'Step Over' features to navigate through the code

• Consider using third-party tools like XMLSpy or Oxygen XML Editor for easier debugging

Find the second greatest element in an array without sorting using C++ concepts.

• Iterate through the array to find the greatest element.

• While iterating, keep track of the second greatest element.

• Return the second greatest element once the iteration is complete.

Up to 60 nodes can be implemented in RAC.

• RAC stands for Real Application Clusters

• The number of nodes depends on the version of Oracle Database being used

• Oracle Database 12c supports up to 60 nodes in RAC

I am passionate about coding and enjoy problem-solving using Python.

• I have a strong interest in programming and have been learning Python for a while.

• I find Python to be a versatile and powerful language that can be used in various applications.

• I enjoy the challenge of writing efficient and clean code to solve complex problems.

• I believe working as a Python developer will allow me to further enhance my skills and contribute to innovative projects.

Priority scheduling CPU scheduler implemented in C language with a 20-line code limit.

• Use an array of structs to store process information including priority.

• Sort the processes based on priority before scheduling.

• Implement a function to switch between processes based on priority levels.

Stack can be implemented using two queues, and Queue can be implemented using two stacks.

• To implement Stack using Queue, we can use two queues. One queue will be used for storing elements and the other will be used for dequeuing elements. When we push an element, we enqueue it to the first queue. When we pop an element, we dequeue all the elements from the first queue and enqueue them to the second queue, except for the last element which is the one to be popped. We then swap...read more

One of the recent biggest accounting frauds in India was the Punjab National Bank (PNB) scam involving Nirav Modi.

• The PNB scam involved fraudulent issuance of Letters of Undertaking (LoUs) worth over $2 billion by Nirav Modi and his associates.

• The scam was uncovered in 2018 when PNB reported unauthorized transactions to the RBI.

• Nirav Modi and his uncle Mehul Choksi were accused of colluding with bank officials to obtain credit from overseas branches of Indian banks using frau...read more

Given 2 arrays, one with n elements and another with n-1 elements, answer the question.

• Compare the elements of both arrays to find the missing element.

• Use a loop or a built-in function to iterate through the arrays.

• Consider edge cases where the missing element is at the beginning or end of the array.

Ingress is a Kubernetes resource that manages external access to services. Prometheus is a monitoring system and Grafana is a visualization tool.

• Ingress is used to route external traffic to the appropriate Kubernetes service

• Prometheus is used to collect and store metrics from various sources

• Grafana is used to visualize the collected metrics in a user-friendly way

• Ingress can be configured to use different load balancing algorithms

• Prometheus has a powerful query language for an...read more

Spring is a popular Java framework for building enterprise applications. Spring Boot is a tool that simplifies the process of creating Spring applications.

• Spring is a framework that provides comprehensive infrastructure support for developing Java applications.

• Benefits of Spring Boot include rapid application development, auto-configuration, and easy deployment.

• Disadvantages of Spring Boot may include increased memory consumption and potential performance overhead.

• Spring Boot...read more

To search words with matching prefixes in multiple vms with huge data, use parallel processing and divide data among vms.

• Divide the data into chunks and distribute them among multiple virtual machines for parallel processing

• Each VM can search for words with matching prefixes in their assigned chunk of data

• Combine the results from all VMs to get the final list of words with matching prefixes

The data structure for efficient implementation of cache level memory is a multi-level cache hierarchy.

• Use a multi-level cache hierarchy with different levels of cache (L1, L2, L3, etc.)

• Each cache level should have a smaller size and faster access time compared to the previous level

• Implement a cache coherence protocol to ensure consistency between different cache levels

• Use a replacement policy (e.g., LRU - Least Recently Used) to determine which data to evict from the cache

• Co...read more

Java 8 introduced several new features including lambda expressions, streams, and default methods.

• Lambda expressions allow for functional programming and simplify code.

• Streams provide a way to process collections of data in a functional way.

• Default methods allow for adding new methods to interfaces without breaking existing implementations.

• Other features include the Optional class, Date and Time API, and Nashorn JavaScript engine.

• Example: Lambda expression - (x, y) -> x + y

• Ex...read more

Map uses a data structure called Hash Table for storing key-value pairs.

• Hash Table is a data structure that allows for fast retrieval of values based on keys.

• It uses a hash function to map keys to their corresponding values in an array.

• Common implementations include HashMap in Java and dict in Python.

A thread in an operating system is a basic unit of CPU utilization, representing a single sequence of execution within a process.

• Threads share the same memory space within a process.

• Threads can communicate with each other more easily than processes.

• Examples of operating systems that support threads include Windows, Linux, and macOS.

OOPS fundamentals include encapsulation, inheritance, polymorphism, and abstraction.

• Encapsulation: Bundling data and methods together in a class.

• Inheritance: Creating new classes from existing ones, inheriting their properties and behaviors.

• Polymorphism: Objects of different classes can be treated as objects of a common superclass.

• Abstraction: Hiding complex implementation details and providing simplified interfaces.

Optimizing MySQL queries involves using indexes, avoiding unnecessary joins, optimizing data types, and using query caching.

• Use indexes on columns frequently used in WHERE, ORDER BY, and GROUP BY clauses.

• Avoid using SELECT * and only fetch the columns needed.

• Optimize data types to use the smallest data type possible for each column.

• Avoid unnecessary joins and use INNER JOIN instead of OUTER JOIN when possible.

• Enable query caching to store the results of frequent queries.

BRM in Telco involves managing relationships with business partners to launch new products in the market.

• BRM in Telco focuses on building and maintaining relationships with business partners such as vendors, suppliers, and distributors.

• It involves negotiating contracts, setting up agreements, and ensuring smooth collaboration between all parties involved.

• To launch a new product in the market, BRM plays a crucial role in coordinating efforts, aligning goals, and managing expec...read more

Program to return square of integers in ascending order from input array

• Iterate through the input array and calculate the square of each integer

• Store the squares in a new array and sort it in ascending order

• Return the sorted array of squares

Java is a high-level programming language used for developing applications. Loops in Java are used for repetitive execution of code.

• Java is an object-oriented language

• It is platform-independent

• Java programs are compiled into bytecode

• Loops in Java include for, while, and do-while loops

• For loop example: for(int i=0; i<10; i++) { // code }

• While loop example: int i=0; while(i<10) { // code; i++; }

• Do-while loop example: int i=0; do { // code; i++; } while(i<10);

Implementing queue using linked lists

• Create a Node class with data and next pointer

• Create a Queue class with head and tail pointers

• Enqueue by adding a new node at the tail and dequeue by removing the head node

• Check for empty queue by checking if head is null

The parsing of a SELECT statement in Oracle database involves several steps.

• The statement is first checked for syntax errors.

• The query is then parsed to identify the objects involved and their relationships.

• The optimizer determines the most efficient execution plan.

• The plan is executed and the result set is returned.

An insert/update statement in Oracle database is parsed by the SQL parser to check syntax and semantics.

• The SQL parser first checks the syntax of the insert/update statement to ensure it follows the rules of the SQL language.

• Next, the parser checks the semantics of the statement, which involves verifying the existence and accessibility of the tables and columns referenced in the statement.

• During parsing, the parser also determines the execution plan for the statement, which i...read more

Inherited variables and methods can be overridden in child classes.

• Inheritance allows child classes to access parent class variables and methods.

• Child classes can override inherited variables and methods with their own implementation.

• The 'super' keyword can be used to call the parent class version of an overridden method.

• Example: class Child extends Parent { int variable = 5; void method() { super.method(); } }

Program to generate Fibonacci numbers using space optimized method.

• Use two variables to store the last two Fibonacci numbers instead of an array.

• Iterate through the sequence by updating the variables with the sum of the previous two numbers.

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

To convert a monolithic application to microservices, you need to break down the application into smaller, independent services.

• Identify the different functionalities of the monolithic application

• Decide on the boundaries of each microservice

• Refactor the codebase to separate out the functionalities into individual services

• Implement communication between the microservices using APIs or messaging queues

• Deploy the microservices independently and manage them using container orches...read more

Abstract classes are used to provide a common base for multiple classes, while interfaces define a contract for classes to implement.

• Abstract classes can contain both abstract and concrete methods, while interfaces can only have abstract methods.

• Abstract classes can have constructors, while interfaces cannot.

• Interfaces allow for multiple inheritance, while classes can only inherit from one abstract class.

• Abstract classes are used when there is a need for a common base impleme...read more

To find the nth node in a linked list, iterate through the list until reaching the nth node.

• Start at the head of the linked list

• Iterate through the list, moving to the next node each time

• Stop when reaching the nth node

Use the lsof command to list all files held by a process

• Use the lsof command followed by the -p flag and the process ID to list files held by a specific process

• For example, to list all files held by process ID 1234, run: lsof -p 1234

• You can also use the -c flag to specify a process name instead of ID, like: lsof -c chrome

I have worked on a variety of technologies including Windows Server, Linux, VMware, Active Directory, and networking equipment.

• Windows Server

• Linux

• VMware

• Active Directory

• Networking equipment

The current revenue recognition standards have changed compared to the previous standards.

• Previous standards recognized revenue when it was realized or realizable and earned, while current standards focus on the transfer of control of goods or services.

• Under previous standards, revenue could be recognized over time using percentage-of-completion method, while current standards require the use of input or output methods to measure progress towards completion.

• The current standa...read more

Function overloading is having multiple functions with the same name but different parameters. Function overriding is redefining a function in a subclass.

• Function overloading allows multiple functions with the same name but different parameters.

• Function overriding involves redefining a function in a subclass with the same name and parameters as in the superclass.

• Example of function overloading: int add(int a, int b) and float add(float a, float b)

• Example of function overridin...read more

Create a class with attributes, sort objects based on attributes, and print.

• Create a class with attributes like name, age, and salary

• Implement Comparable interface to define sorting logic based on attributes

• Create objects of the class, add them to a list, and use Collections.sort() to sort them

• Print the sorted objects

Standby Redo logfiles are required for data protection and disaster recovery in Oracle databases.

• Standby Redo logfiles are essential for maintaining a standby database in Oracle Data Guard for disaster recovery purposes.

• They contain a record of changes made to the primary database, which can be applied to the standby database to keep it synchronized.

• In case of a primary database failure, the standby database can be activated quickly using the standby redo logfiles to minimize...read more

I prioritize tasks, set clear expectations, utilize time management tools, and communicate effectively.

• Prioritize tasks based on urgency and importance

• Set clear expectations with clients regarding response times and availability

• Utilize time management tools such as calendars and task lists

• Communicate effectively with clients to provide updates and manage expectations

The master switch in Exadata can be identified by checking the status of the cell server software.

• Check the status of the cell server software using the 'cellcli' command

• The cell server with the 'MS' role is the master switch

• The master switch can also be identified by checking the 'cellinit.ora' file

Spine switch and leaf switch are networking components in Exadata used for connecting database servers and storage servers.

• Spine switch acts as the core of the network, connecting all leaf switches and providing high-speed connectivity.

• Leaf switches connect database servers and storage servers to the spine switch, facilitating communication between them.

• Exadata uses a leaf-spine network architecture for efficient data transfer and scalability.

• Spine switches typically have hig...read more

C++ supports polymorphism through virtual functions and inheritance.

• C++ supports polymorphism through virtual functions and inheritance

• Virtual functions allow a function to be overridden in a derived class

• Base class pointers can point to derived class objects and call overridden functions

• Example: class Animal { virtual void speak() { cout << 'Animal speaks'; } }; class Dog : public Animal { void speak() { cout << 'Dog barks'; } }; Animal* a = new Dog(); a->speak(); // Output:...read more

11i and R12 are two different versions of Oracle E-Business Suite.

• 11i is the older version, released in 2000, while R12 was released in 2007.

• R12 has a more modern architecture and improved features, such as online patching and subledger accounting.

• Upgrading from 11i to R12 requires careful planning and testing.

• Both versions are still in use, but Oracle has announced that support for 11i will end in 2020.

I recently worked on implementing Oracle ERP Cloud for a manufacturing company.

• Configured financial modules such as General Ledger, Accounts Payable, and Accounts Receivable

• Integrated supply chain modules for inventory management and procurement

• Customized reports and dashboards for management visibility

• Provided training to end users on system functionalities

String pool is a cache of string literals stored in memory for efficient reuse.

• String pool is a part of Java's memory management system.

• It stores a collection of unique string literals to save memory.

• When a new string is created, it is first checked in the pool and reused if already present.

• String pool can be accessed using the intern() method.

• Example: String s1 = "Hello"; String s2 = "Hello"; s1 and s2 will point to the same object in the pool.

Mapped in and mapped out in OPA refers to the process of importing and exporting data from external sources.

• Mapped in refers to the process of importing data into OPA from external sources such as spreadsheets or databases.

• Mapped out refers to the process of exporting data from OPA to external sources.

• Mapping in and out is done using the OPA Data Mapper tool.

• Data can be mapped in and out in various formats such as CSV, XML, and JSON.

Errors in 4xx format usually indicate client-side errors.

• 4xx errors are typically caused by the client sending a request that is incorrect or cannot be fulfilled.

• Examples include 400 Bad Request, 401 Unauthorized, 403 Forbidden, and 404 Not Found.

• These errors are different from 5xx errors which indicate server-side issues.

A program to find a palindrome word in a 2D matrix of strings.

• Iterate through each row and column of the matrix

• Check if each string is a palindrome using two pointers approach

• Return the first palindrome word found

Count nodes in a binary tree without using recursion

• Use a stack to keep track of nodes to visit

• Pop nodes from the stack and increment count for each node visited

• Continue until stack is empty

Find length of longest subarray with all unique elements in an integer array.

• Use a sliding window approach to keep track of unique elements in the subarray.

• Use a set to store unique elements and update the window accordingly.

• Iterate through the array and update the window size based on unique elements.

The minimum area of a square that contains all given points is the square of the maximum distance between any two points.

• Calculate the distance between all pairs of points

• Find the maximum distance

• Square the maximum distance to get the minimum area of the square

Rates in Oracle Projects are setup using rate schedules and rate matrices.

• Rate schedules define the rates for different resources or roles in a project

• Rate matrices define the rates based on different criteria such as project type, organization, or location

• Rates can be setup for different time periods, such as hourly, daily, or monthly

• Rates can also be setup for different cost types, such as labor, material, or equipment

• Example: A rate schedule can define the hourly rate for ...read more

Oracle is a multinational computer technology corporation that specializes in developing and marketing database software and technology.

• Oracle is known for its flagship product, the Oracle Database, which is widely used in enterprise applications.

• It also offers a range of other software products, including middleware, application development tools, and cloud services.

• Oracle has a strong presence in the enterprise market and is a major competitor to other database vendors like...read more

Find the longest subsequence in a string without repeating characters.

• Use a sliding window approach to keep track of the characters seen so far.

• Update the start index of the window when a repeating character is encountered.

• Keep track of the longest subsequence length seen so far.