Codilar Technologies Associate Software Engineer Interview Questions and Answers

Dsa question like pattern or any other basic dsa

Q1. Based on js in depth knowledge
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Q2. Then react better if we know class components
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Numeric ability test, Verbal ability test, Reasoning ability test.

To clear coding test, just need to solve 1 question out of 5, difficulty level of question - most of the time appear as (3 easy 2 medium) .

Q1. Question will be asked 100% from your resume. whatever skills or academic knowledge you added in your resume.
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Q2. Tell me something about yourself?
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Q3. Implement LinkedList Data Structure ?
Ans. 
A LinkedList is a linear data structure where each element is a separate object with a reference to the next element.
• Create a Node class with data and next pointer

• Initialize LinkedList with a head node pointing to null

• Implement methods like insert, delete, search, and traverse

• Example: Node class {int data; Node next;}

• Example: Insert method to add a new node at the end of the list
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Q4. Write down any sorting algorithm?
Ans. 
Bubble Sort is a simple sorting algorithm that repeatedly steps through the list, compares adjacent elements and swaps them if they are in the wrong order.
• Compare adjacent elements and swap if necessary

• Repeat until no swaps are needed

• Time complexity: O(n^2)

• Space complexity: O(1)

• Example: [5, 3, 8, 2, 1] -> [3, 5, 2, 1, 8] -> [3, 2, 1, 5, 8] -> [2, 1, 3, 5, 8] -> [1, 2, 3, 5, 8]
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Q5. Write SQL queries for 2nd maximum salary from employee table
Ans. 
SQL query to find 2nd maximum salary from employee table
• Use ORDER BY and LIMIT to get the second highest salary

• SELECT salary FROM employee ORDER BY salary DESC LIMIT 1, 1
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Medium level stars pattern for programming

Q1. What is servlets
Ans. 
Servlets are Java programs that run on a server, handling client requests and generating dynamic web content.
• Servlets are part of the Java EE (Enterprise Edition) specification.

• They extend the capabilities of servers that host applications accessed via a request-response programming model.

• Servlets can handle complex business logic and interact with databases.

• Example: A servlet can process form data submitted from a web...read more
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Q2. What are the steps in JDBC
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JDBC (Java Database Connectivity) enables Java applications to interact with databases through a standard API.
• 1. Load the JDBC Driver: Use Class.forName() to load the driver class. Example: Class.forName('com.mysql.cj.jdbc.Driver');

• 2. Establish a Connection: Use DriverManager.getConnection() to connect to the database. Example: Connection conn = DriverManager.getConnection(url, user, password);

• 3. Create a Statement: Us...read more
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Q1. Simple js questions
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Q2. Some tricky questions on js and basics
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