Deutsche Bank
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HashMap is a data structure that stores key-value pairs and allows for fast retrieval of values based on keys.
HashMap is part of the Java Collections framework.
It allows for efficient retrieval of values based on keys.
Keys in a HashMap must be unique, but values can be duplicated.
Example: HashMap
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Finding smallest of 4 numbers without using >.< and min function in Java.
Initialize a variable with the first number
Compare it with the remaining numbers using if-else statements
If a smaller number is found, update the variable
Repeat until all numbers are compared
The final value of the variable will be the smallest number
Code for palindrome checking
Convert the input to lowercase to ignore case sensitivity
Use two pointers, one at the start and one at the end of the string
Compare the characters at both pointers and move them towards each other
If all characters match, it's a palindrome
Javascript code to display 'Hello World!' on the webpage
Create a new HTML file
Add a script tag with 'type' attribute set to 'text/javascript'
Inside the script tag, use document.write() to display 'Hello World!'
Swap two numbers without using a temporary variable.
Use addition and subtraction to swap the values
Use XOR operator to swap the values
Use multiplication and division to swap the values
To add 2 tables, we need to use a join operation on a common column.
Identify the common column between the tables
Choose the appropriate join type (inner, outer, left, right)
Write the SQL query to join the tables
Example: SELECT * FROM table1 INNER JOIN table2 ON table1.column = table2.column
Union combines and removes duplicates, Union All combines all rows including duplicates.
Union is used to combine the result sets of two or more SELECT statements and remove duplicates.
Union All is used to combine the result sets of two or more SELECT statements and includes all rows, including duplicates.
Union is slower than Union All as it has to remove duplicates.
Union requires the same number of columns in all SELEC...
Being assigned a project with unrealistic deadlines and minimal guidance
Received a project with tight deadlines and unclear requirements
Struggled to meet the deadlines due to lack of guidance and support
Had to work long hours and weekends to try to complete the project
Learned the importance of clear communication and setting realistic expectations
I applied via Campus Placement and was interviewed before Jan 2021. There were 4 interview rounds.
Generic topics that were trending at the time
I applied via Campus Placement and was interviewed in May 2021. There were 3 interview rounds.
I applied via Campus Placement and was interviewed in Oct 2024. There were 2 interview rounds.
I appeared for an interview before Nov 2023.
SQL is a relational database management system, while NoSQL is a non-relational database management system.
SQL databases are table-based, with a predefined schema, while NoSQL databases are document-based, key-value pairs, graph databases, or wide-column stores.
SQL databases are good for complex queries and transactions, while NoSQL databases are better for large amounts of data and scalability.
Examples of SQL database...
Bank of America offers a challenging work environment, opportunities for growth, and a strong reputation in the industry.
Bank of America has a strong reputation in the banking industry
The company offers opportunities for growth and career development
Bank of America provides a challenging work environment for software engineers
I applied via Naukri.com and was interviewed before Mar 2022. There were 2 interview rounds.
I applied via Recruitment Consulltant and was interviewed in Nov 2022. There were 4 interview rounds.
Algorithms and data structures questions similar to leetcode
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