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String reversal in Java can be achieved using various methods, including loops, recursion, and built-in functions.
Using StringBuilder: The StringBuilder class has a reverse() method that can easily reverse a string. Example: StringBuilder sb = new StringBuilder("hello"); sb.reverse(); // Output: "olleh"
Using a Loop: You can reverse a string by iterating from the end to the beginning. Example: String str = "hello";...
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
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
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 imp...
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.
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.
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.
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...
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.
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, i...
I applied via Campus Placement and was interviewed in Nov 2024. There were 3 interview rounds.
It was easy only, simple queue and array questions
I applied via Campus Placement and was interviewed in Sep 2024. There were 3 interview rounds.
HackerRank coding assessment.
I applied via Company Website and was interviewed in Aug 2024. There were 3 interview rounds.
Basic Aptitude OOPs DBMS
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 implemen...
I applied via Campus Placement and was interviewed in Aug 2024. There were 2 interview rounds.
It was easy. It contained basic question around core CS topics. It also contained 1 coding questions around strings. Whereas some of my friends got a difficult question around DP.
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.
I appeared for an interview in Mar 2025, where I was asked the following questions.
I applied via Campus Placement and was interviewed in Sep 2024. There was 1 interview round.
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
Aptitude questions plus 1 coding question on graph.
I appeared for an interview in Mar 2025, where I was asked the following questions.
I applied via Campus Placement and was interviewed in Apr 2024. There were 3 interview rounds.
I applied via Campus Placement
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Some of the top questions asked at the Oracle Financial Services Software Associate Consultant interview -
The duration of Oracle Financial Services Software Associate Consultant interview process can vary, but typically it takes about less than 2 weeks to complete.
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