100+ Oracle Interview Questions and Answers for Freshers

The game is not fair.

• Player X has a higher chance of winning as they only need to get a consecutive HEAD, TAIL.

• Player Y needs to get a consecutive HEAD, HEAD which is less likely to occur.

• The probability of Player X winning is higher than Player Y winning.

The last ball that will be left is black.

• When you take out 2 black balls, you take another white ball.

• If you take 2 white balls, you take out 1 black ball.

• If balls are of different color, you take out another black ball.

• Since there are more black balls initially, the last ball will be black.

Design a website similar to bookmyshow.com for booking cinema tickets for a single location with multiple theatres.

• Design a user-friendly GUI with options for advance booking, user login, user registration, movie rating, and saving card details.

• Create relevant database tables to store information about movies, theatres, bookings, user details, and card details.

• Link the GUI to the database to enable data flow and retrieval.

• Implement features like advance booking, where users c...read more

The program prints the substring after a specified character has occurred a certain number of times in a given string.

• Iterate through the string to find the specified character.

• Keep track of the count of occurrences of the character.

• Once the count reaches the specified count, extract the substring after that position.

• Handle corner cases such as when the character is not in the string or when it doesn't occur the specified number of times.

Minimum number of times to turn all glasses upside down when 4 can be turned at a time.

• Turn over any four glasses, leaving one untouched.

• Repeat the above step until only one glass is left upside down.

• Finally, turn over the last glass to complete the task.

• Minimum number of turns required is 3.

Given a sorted N * N matrix, find the position of a target integer 'X'.

• Use binary search in each row to narrow down the search space.

• Start from the top-right corner or bottom-left corner for efficient search.

• Handle cases where 'X' is not found by returning {-1, -1}.

Print all possible paths from start to end in a linear way, moving either one or two steps right.

• Use dynamic programming to solve the problem

• Create a 2D array to store the number of paths to each position

• Start from the end position and work backwards

• At each position, calculate the number of paths by summing the number of paths from the next two positions

• Print all the paths by backtracking from the start position

The problem is to determine if it is possible to partition an array into two subsets with equal sum.

• Use dynamic programming to solve this problem efficiently.

• Create a 2D array to store the results of subproblems.

• Check if the sum of the array is even before attempting to partition it.

• Iterate through the array and update the 2D array based on the sum of subsets.

• Return true if a subset with half the sum is found, false otherwise.

Convert a given string to Pascal case format by removing spaces and capitalizing the first letter of each word.

• Iterate through each character in the string

• If the character is a space, skip it

• If the character is not a space and the previous character is a space or it is the first character, capitalize it

Check if given string of parentheses is balanced or not.

• Use a stack to keep track of opening parentheses

• Pop from stack when encountering a closing parenthesis

• Return 'YES' if stack is empty at the end, 'NO' otherwise

Find the length of the largest subarray with equal number of 0s and 1s in a given array.

• Iterate through the array and maintain a count of 0s and 1s encountered so far.

• Store the count difference in a hashmap with the index as key.

• If the same count difference is encountered again, the subarray between the two indices has equal 0s and 1s.

• Return the length of the largest such subarray found.

Convert a binary tree into a sum tree by replacing each node's value with the sum of its children's values. Return the preorder traversal of the sum tree.

• Traverse the tree in a bottom-up manner to calculate the sum of children for each node.

• Set leaf nodes to 0 and update non-leaf nodes with the sum of their children.

• Return the preorder traversal of the modified tree.

Convert a given integer number into its corresponding word representation.

• Implement a function that takes an integer as input and returns the word representation of the number in English lowercase letters.

• Break down the number into its individual digits and convert each digit into its word form (e.g., 1 to 'one', 2 to 'two').

• Combine the word forms of individual digits to form the word representation of the entire number.

• Ensure there is a space between consecutive words and th...read more

The code inserts two numbers in a text file, ensuring that the second number is greater than the first and there is no overlap between entries.

• Read the existing entries from the text file

• Check if the new numbers satisfy the conditions

• If conditions are met, insert the new numbers into the file

• Otherwise, display an error message

Given a graph with 'N' vertices and 'M' edges, determine if it can be colored using two colors without adjacent vertices sharing the same color.

• Use graph coloring algorithm like BFS or DFS to check if it is possible to color the graph with two colors.

• Check if any adjacent vertices have the same color. If yes, then it is not possible to color the graph as described.

• If the graph has connected components, color each component separately to determine if the entire graph can be co...read more

Rotate a square matrix by 90 degrees anti-clockwise without using extra space.

• Iterate through each layer of the matrix from outer to inner layers

• Swap elements in groups of 4 to rotate the matrix in place

• Handle odd-sized matrices separately by adjusting the loop boundaries

Reverse words in a string word by word, removing leading/trailing spaces and extra spaces between words.

• Split the input string by spaces to get individual words

• Reverse the order of the words

• Join the reversed words with a single space in between

The task is to determine the minimum number of platforms needed at a railway station based on arrival and departure times of trains.

• Sort the arrival and departure times in ascending order.

• Use two pointers to track overlapping schedules.

• Increment platform count when a new train arrives before the previous one departs.

Code to find the middle element of a linked list

• Traverse the linked list with two pointers, one moving twice as fast as the other

• When the fast pointer reaches the end, the slow pointer will be at the middle element

• If the linked list has even number of elements, return the second middle element

Code to count the number of times '1' occurs from 1 to 999999

• Loop through all numbers from 1 to 999999

• Convert each number to a string and count the number of '1's in it

• Add the count to a running total

• Return the total count

The code prints the transpose of a given matrix.

• Iterate through each row and column of the matrix.

• Swap the elements at the current row and column with the elements at the current column and row.

• Print the transposed matrix.

Arrange 4 coins to make maximum number of triangles

• Place 3 coins in a triangle formation and the fourth coin in the center to form 4 triangles

• Place 2 coins on top of each other and the other 2 coins on either side to form 2 triangles

• Place 2 coins in a line and the other 2 coins on either side to form 2 triangles

Arrange 10 coins in 4 rows of 4 coins each.

• Place 4 coins in a row and keep the remaining 6 aside.

• Place 3 coins from the remaining 6 in the next row and keep the remaining 3 aside.

• Place 2 coins from the remaining 3 in the third row and keep the remaining 1 aside.

• Place the last coin in the fourth row along with the remaining 1 coin from step 3.

• The final arrangement will have 4 rows with 4 coins each.

Multitasking is the ability of an operating system to run multiple tasks concurrently while multiprogramming is the ability to run multiple programs concurrently.

• Multitasking allows multiple tasks to run concurrently on a single processor system.

• Multiprogramming allows multiple programs to run concurrently on a single processor system.

• Multitasking is achieved through time-sharing, where the processor switches between tasks at a very high speed.

• Multiprogramming is achieved thr...read more

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

Microcontroller is a self-contained system with memory, peripherals and processor, while microprocessor only has a processor.

• Microcontroller has on-chip memory and peripherals, while microprocessor requires external memory and peripherals.

• Microcontroller is used in embedded systems, while microprocessor is used in general-purpose computing.

• Examples of microcontrollers include Arduino, PIC, and AVR, while examples of microprocessors include Intel Pentium, AMD Ryzen, and ARM Co...read more

Yes, an array can have elements of different data types.

• An array can have elements of different data types, but it's not recommended.

• It can make the code harder to read and maintain.

• For example, an array can have both strings and numbers: ['apple', 5, 'banana']

SQL query to retrieve the Nth highest salary from a database

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

• Use the LIMIT clause to retrieve the Nth highest salary

• Consider handling cases where there might be ties for the Nth highest salary

A linked list is a linear data structure where each element is a separate object linked together by pointers.

• Linked list is used to implement stacks, queues, and hash tables.

• It is used in computer memory allocation.

• It is used in image processing to represent pixels.

• It is used in music player to create a playlist.

• It is used in web browsers to store the history of visited web pages.

Modified Balanced Parentheses where characters can be matched with any other character.

• Use a stack to keep track of opening characters

• When encountering a closing character, check if it matches the top of the stack

• If it matches, pop from the stack, else return false

• Continue until end of string, return true if stack is empty

Find the largest element in a window of size K in an array.

• Iterate through the array and maintain a deque to store the indices of elements in decreasing order.

• Remove indices from the front of the deque that are outside the current window.

• The front of the deque will always have the index of the largest element in the current window.

Print all possible combinations of strings by picking one character from each string in the array.

• Iterate through each character of the first string and combine it with each character of the second string.

• Repeat the process for all strings in the array to get all possible combinations.

• Use nested loops to generate combinations efficiently.

Data structures are ways of organizing and storing data in a computer so that it can be accessed and used efficiently.

• Data structures can be linear or non-linear

• Examples of linear data structures include arrays, linked lists, and stacks

• Examples of non-linear data structures include trees and graphs

• Choosing the right data structure is important for optimizing performance and memory usage

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.

Identify numbers whose sum with digits equals given integer N.

• Iterate through numbers from 1 to N and check if sum of number and its digits equals N.

• Use a helper function to calculate sum of digits for a given number.

• Return -1 if no such number exists for a test case.

Java program to calculate date n days after given date without using Date parsing libraries.

• Parse the input date string to extract day, month, and year components.

• Calculate the total number of days represented by the input date.

• Add the specified number of days to the total days calculated.

• Convert the final total days back to day, month, and year components to get the new date.

Transactions in a bank involve the movement of funds between accounts or the exchange of currency.

• Transactions can be initiated by customers or by the bank itself

• Common types of transactions include deposits, withdrawals, transfers, and loans

• Transactions are recorded in the bank's ledger and may be subject to fees or interest

• Electronic transactions have become increasingly popular, such as online banking and mobile payments

My phone uses iOS. Other phone operating systems available in the market are Android, Windows, and Blackberry OS.

• iOS is developed by Apple and is exclusive to iPhones and iPads.

• Android is developed by Google and is used by various phone manufacturers such as Samsung, LG, and HTC.

• Windows is developed by Microsoft and is used by Nokia and other phone manufacturers.

• Blackberry OS is developed by Blackberry and is exclusive to Blackberry phones.

SQL query using joins

• Use JOIN keyword to combine rows from two or more tables based on a related column between them

• Types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN

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

Use backtracking to find all combinations of numbers in an array that sum up to a given number.

• Start by sorting the array in non-decreasing order to easily identify combinations.

• Use backtracking to recursively find all combinations that sum up to the target number.

• Keep track of the current combination and the remaining sum as you traverse the array.

• Add the current combination to the result when the sum equals the target number.

Merge K sorted arrays into a single sorted array.

• Iterate through all arrays and merge them using a min-heap.

• Use a priority queue to efficiently merge the arrays.

• Time complexity can be optimized to O(N log K) using a min-heap.

Given an array of first N positive integers with one number repeating and one missing, find the repeating and missing numbers.

• Iterate through the array and keep track of the sum of elements and sum of squares of elements.

• Calculate the missing number using the formula: missing = N*(N+1)/2 - sum of elements.

• Calculate the repeating number using the formula: repeating = missing + sum of elements - sum of squares of elements.

Given a preorder traversal of a BST, construct the BST and print its inorder traversal.

• Parse the input to get the number of test cases and preorder traversal for each case

• Construct the BST using the preorder traversal by recursively building the tree

• Print the inorder traversal of the constructed BST for each test case

Design a Tic Tac Toe game

• Create a 3x3 grid to represent the game board

• Allow two players to take turns marking X and O on the grid

• Check for win conditions after each move to determine the winner

• Handle tie game if all spaces are filled without a winner

The task is to rearrange an array such that no two adjacent elements are the same.

• Iterate through the array and check if any adjacent elements are the same.

• If adjacent elements are the same, swap one of them with a different element.

• Return 'YES' if a valid rearrangement is possible, 'NO' otherwise.

Determine if two strings are anagrams of each other by checking if they have the same characters in different order.

• Create character frequency maps for both strings

• Compare the frequency of characters in both maps to check if they are anagrams

• Return True if the frequencies match, False otherwise

Check if a given string represents a valid binary number composed of 0s and 1s.

• Iterate through each character in the string and check if it is either '0' or '1'.

• If any character is not '0' or '1', return 'false'.

• Return 'true' if all characters are '0' or '1'.

Print Pythagorean triplets within a given range.

• Iterate through all possible combinations of a, b, and c within the given range

• Check if a^2 + b^2 = c^2 for each combination

• Print the triplets that satisfy the Pythagorean theorem

Reverse a given string containing characters from [a-z], [A-Z], [0-9], and special characters.

• Iterate through each character in the string and append them in reverse order to a new string

• Use built-in functions like reverse() or slice() to reverse the string

• Handle special characters and numbers along with alphabets

Convert a given BST into a Greater Tree by updating each node's data to the sum of original data and all greater nodes' data.

• Traverse the BST in reverse inorder (right, root, left) to update nodes' data.

• Keep track of the sum of greater nodes' data while traversing.

• Update each node's data by adding the sum of greater nodes' data to the original data.

• Example: Input BST: 4 1 6 0 2 5 7 -1 -1 -1 3 -1 -1 -1 -1. Output Greater Tree: 22 26 15 30 27 18 7 -1 -1 -1 33 -1 -1 -1 -1.

Check if a string has balanced parentheses.

• Use a stack to keep track of opening parentheses.

• Iterate through the string and push opening parentheses onto the stack.

• When a closing parenthesis is encountered, pop from the stack and check if it matches the closing parenthesis.

• If stack is empty at the end and all parentheses are matched, the string has balanced parentheses.

I recently downloaded VLC media player.

• Visited the official website of VLC media player

• Clicked on the download button

• Selected the appropriate version for my operating system

• Waited for the download to complete

• Opened the downloaded file and followed the installation wizard

Static variables can be accessed from non-static methods using an object reference or by making the variable non-static.

• Static variables can be accessed from non-static methods by creating an object of the class containing the static variable.

• Alternatively, the static variable can be made non-static to be accessed directly from a non-static method.

• Attempting to access a static variable directly from a non-static method will result in a compilation error.

Two objects created - one in the string pool and one in the heap.

• String 'a' is created in the string pool, while String 'b' is created in the heap.

• String pool is a special area in the heap memory where strings are stored to increase reusability and save memory.

• Using 'new' keyword always creates a new object in the heap, even if the content is the same as an existing string in the pool.

Only the original string 'Something' will be garbage collected.

• The concat method in Java does not modify the original string, but instead returns a new string with the concatenated value.

• In this case, 'a' remains as 'Something' and a new string 'Something New' is created, but not assigned to any variable.

• Since the new string is not stored in any variable, it will not be garbage collected.

Around 600 flights are handled by Bangalore airport on a daily basis.

• Bangalore airport is one of the busiest airports in India

• It handles both domestic and international flights

• On average, there are around 25-30 flights per hour

• The number of flights may vary depending on the day of the week and time of the year

Finding common elements in two sorted linked lists.

• Traverse both lists simultaneously using two pointers.

• Compare the values of the nodes pointed by the two pointers.

• If they are equal, add the value to the result list and move both pointers.

• If not, move the pointer pointing to the smaller value.

• Repeat until one of the lists is fully traversed.

Delete nth node from end of linked list

• Use two pointers, one to traverse the list and another to keep track of the nth node from the end

• Once the nth node is reached, move both pointers until the end of the list

• Delete the node pointed by the second pointer

The result of adding two binary numbers in a 64-bit and a 32-bit operating system will differ due to the different number of bits used for calculations.

• In a 64-bit operating system, the result will be more accurate and can handle larger numbers compared to a 32-bit system.

• Overflow may occur in a 32-bit system when adding large binary numbers, leading to incorrect results.

• Example: Adding 1111 (15 in decimal) and 1111 (15 in decimal) in a 32-bit system may result in overflow an...read more

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

Sort an array of strings based on their frequency of occurrence.

• Create a frequency map to count the occurrences of each string

• Sort the strings based on their frequency in descending order

• If two strings have the same frequency, sort them lexicographically

• Return the sorted array

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.

The Camel Banana problem is a puzzle that involves calculating the number of bananas a camel can eat.

• The problem involves a camel that can carry a certain weight and a number of bananas with different weights.

• The camel can only carry a maximum weight and can only eat a certain number of bananas.

• The goal is to determine the maximum number of bananas the camel can eat without exceeding its weight limit.

Inheritance in OOP allows a class to inherit properties and behaviors from another class.

• Inheritance promotes code reusability by allowing a new class to use the properties and methods of an existing class.

• The class that is being inherited from is called the base class or parent class, while the class that inherits is called the derived class or child class.

• Derived classes can add new properties and methods, or override existing ones from the base class.

• Example: class Animal ...read more

OOPs stands for Object-Oriented Programming. It is a programming paradigm based on the concept of objects.

• OOPs is a way of organizing and designing code around objects

• It emphasizes on encapsulation, inheritance, and polymorphism

• It helps in creating reusable and modular code

• Examples of OOPs languages are Java, C++, Python, etc.

HAVING clause is used with GROUP BY to filter groups, WHERE clause is used to filter rows.

• HAVING clause is used with GROUP BY clause to filter groups based on aggregate functions.

• WHERE clause is used to filter rows based on conditions.

• HAVING clause is used after GROUP BY clause, while WHERE clause is used before GROUP BY clause.

• HAVING clause can use aggregate functions, while WHERE clause cannot.

• Example: SELECT category, COUNT(*) FROM products GROUP BY category HAVING COUNT(*...read more

Static typing requires variable types to be declared at compile time, while dynamic typing allows types to be determined at runtime.

• Static typing requires explicit declaration of variable types, while dynamic typing infers types at runtime.

• Static typing helps catch errors at compile time, while dynamic typing may lead to runtime errors.

• Python is dynamically typed, but can be used with type hints for static type checking.

• Example of static typing: int x = 5

• Example of dynamic ty...read more

Emulate Producer/Consumer Problem using code

• Create a shared buffer between producer and consumer

• Use synchronization mechanisms like mutex or semaphore to control access to the buffer

• Implement producer and consumer functions to add and remove items from the buffer respectively

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

PL/SQL is a procedural language designed specifically for the Oracle Database management system.

• PL/SQL is used to create stored procedures, functions, triggers, and packages in Oracle databases.

• It is a block-structured language that allows developers to write code in logical blocks.

• PL/SQL supports data types such as VARCHAR2, NUMBER, DATE, BOOLEAN, etc.

• It also supports control structures like IF-THEN-ELSE, FOR LOOP, WHILE LOOP, etc.

• PL/SQL can be used to manipulate data in Ora...read more

Rotate a linked list

• Create a new node and make it the head

• Traverse the list to find the tail and connect it to the old head

• Update the tail to point to null

• Handle edge cases like empty list or rotating by 0 positions

Creating a deadlock involves two or more threads waiting for each other to release a resource they need.

• Create two threads, each trying to lock two resources in a different order

• Ensure that one thread locks resource A first and then tries to lock resource B, while the other thread locks resource B first and then tries to lock resource A

• This will result in a situation where each thread is waiting for the other to release the resource it needs, causing a deadlock

Implement LRU Cache using a data structure like LinkedHashMap in Java

• Use LinkedHashMap to maintain insertion order

• Override removeEldestEntry method to limit cache size

• Update the access order on get and put operations

Calculate the product of all elements in an array except for the element itself.

• Iterate through the array and calculate the product of all elements except the current element.

• Use two separate arrays to store the product of elements to the left and right of the current element.

• Multiply the corresponding elements from the left and right arrays to get the final result.

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

Polyfill for array map function in JavaScript

• Create a function called myMap that takes a callback function as an argument

• Loop through the array and apply the callback function to each element

• Return a new array with the results of the callback function applied to each element

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.

POJO is a Plain Old Java Object with private fields and public getters/setters, while a Bean is a Java class with private fields and public zero-argument constructors.

• POJO stands for Plain Old Java Object

• POJO has private fields and public getters/setters

• Bean is a Java class with private fields and public zero-argument constructors

• Beans are usually used in Java EE frameworks like Spring for dependency injection

Code to start 5 threads in Java

• Create a class that implements the Runnable interface

• Instantiate 5 objects of the class

• Create 5 threads using the objects and start them

Code to read a file in Java

• Use FileReader and BufferedReader classes to read the file

• Handle exceptions using try-catch blocks

• Close the file after reading using close() method

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.

Program to separate strong for special characters in an array of strings

• Iterate through each string in the array

• For each string, iterate through each character

• Check if the character is a special character and separate it into a new string if it is

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

• Ensures a class has only one instance by providing a global access point to it.

• Uses a private constructor to restrict instantiation of the class.

• Provides a static method to access the singleton instance.

• Commonly used in scenarios where only one instance of a class is needed, such as database connections or logging.

• Example: Singleton pattern can be implemented in Java using a pr...read more

Find the second highest occurrence of a vowel in a string.

• Iterate through the string and count the occurrences of each vowel (a, e, i, o, u).

• Store the counts in an array and find the second highest count.

• Return the vowel with the second highest count.

To count the number of links on a web page, you can use a web scraping tool or inspect the page's HTML code.

• Use a web scraping tool like BeautifulSoup or Selenium to extract all the links from the webpage.

• Inspect the HTML code of the webpage and look for anchor tags (<a>) which contain the links.

• Count the number of anchor tags to determine the total number of links on the webpage.

Use CSS selector to locate element on webpage

• Use unique id or class names to locate element

• Use CSS selectors like 'id', 'class', 'name', 'tag name', etc.

• Use XPath if necessary for complex element locating

Normalization to BCNF ensures that every non-trivial functional dependency is satisfied.

• Identify all functional dependencies

• Eliminate partial dependencies

• Eliminate transitive dependencies

• Ensure every determinant is a candidate key

Code quality can be measured through various metrics and tools to ensure readability, maintainability, efficiency, and reliability.

• Use code review processes to assess adherence to coding standards and best practices

• Utilize static code analysis tools to identify potential bugs, code smells, and security vulnerabilities

• Measure code complexity using metrics like cyclomatic complexity and maintainability index

• Track code coverage with unit tests to ensure adequate test coverage

• Mon...read more

Polymorphism is the ability of an object to take on many forms.

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

• It enables methods to be overridden in a subclass to provide different implementations.

• Polymorphism enhances code reusability and flexibility.

• Example: A superclass 'Animal' with subclasses 'Dog' and 'Cat' can be treated as 'Animal' objects.

• Example: Method 'draw()' in superclass 'Shape' can be overridden in subclasses '...read more

In 2 years, I see myself as a proficient Order Management Analyst with a deep understanding of the industry and a track record of successful projects.

• Continuing to develop my skills in order management software and systems

• Taking on more complex projects and responsibilities

• Building strong relationships with clients and colleagues

• Possibly pursuing additional certifications or advanced education in the field

Remove zeros from arrays list of strings

• Iterate through each string in the array

• Use filter method to remove zeros from each string

• Return the updated array without zeros

FindElements method returns a list of web elements matching the specified locator.

• Return type of FindElements is List

• It returns a list of all elements matching the specified locator

• Example: List elements = driver.findElements(By.xpath("//input[@type='text']"));

Abstraction is the process of simplifying complex systems by focusing on the essential details.

• Abstraction involves hiding unnecessary details and exposing only the relevant information.

• It allows us to create models or representations that capture the essential characteristics of a system.

• Abstraction helps in managing complexity and improving understanding and communication.

• Examples of abstraction include using functions or methods to encapsulate a series of operations, using...read more

Find all nodes at distance k from a given node in a binary tree.

• Use depth-first search to traverse the binary tree and keep track of the distance from the target node.

• When reaching the target node, start exploring its children at distance k.

• Consider using a queue to keep track of nodes at each level while traversing the tree.

Design a database schema for a university

• Create tables for students, courses, professors, departments, and enrollments

• Establish relationships between tables using foreign keys

• Include attributes such as student ID, course ID, professor ID, department ID, and enrollment date

• Consider normalization to reduce redundancy and improve data integrity