IDBI Intech Limited Customer Relation Associate Interview Questions and Answers

Question related to dilr, aptitude were asked.

Easy level questions were asked

1 hr withs ome basic english grammer

Q1. What is servlet life cycle
Ans. 
Servlet life cycle refers to the sequence of events that occur during the lifespan of a servlet.
• Servlet is loaded into memory when the server starts

• init() method is called to initialize the servlet

• service() method is called to handle client requests

• destroy() method is called when the servlet is removed from memory

• Servlet can be reloaded if the server is restarted
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Q2. What is try with resources
Ans. 
Try with resources is a feature introduced in Java 7 to automatically close resources after use.
• It simplifies the code by eliminating the need for a finally block to close the resource

• The resource must implement the AutoCloseable interface

• Multiple resources can be declared in a single try-with-resources statement

• Example: try(FileInputStream fis = new FileInputStream("file.txt")) { //code }
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Basic aptitude test.

Q1. Basic sql db questions
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Q2. Project related questions
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Q1. Tell about yourself?
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Q1. Transient and volatile keyword?
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Q2. Synchronize ,marker interface java 1.8 features
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Q1. Explain OOPs concepts.
Ans. 
OOPs concepts are fundamental principles of object-oriented programming that help in designing and implementing software solutions.
• Encapsulation: Bundling data and methods together in a class.

• Inheritance: Creating new classes by inheriting properties and behaviors from existing classes.

• Polymorphism: Ability of an object to take on many forms.

• Abstraction: Hiding complex implementation details and providing a simplified ...read more
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Q2. Write a program to count occurance the letter in a string.
Ans. 
This program counts the occurrence of each letter in a given string.
• Use a HashMap to store the count of each letter.

• Iterate through the characters of the string and update the count in the HashMap.

• Finally, print the count of each letter.
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Q3. Write a SQL query to find third highest salary from employee table.
Ans. 
SQL query to find third highest salary from employee table.
• Use the ORDER BY clause to sort the salaries in descending order

• Use the LIMIT clause to limit the result to the third row

• Use a subquery to exclude the highest and second highest salaries
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Q4. Difference between Array and arraylist.
Ans. 
Array is a fixed-size data structure while ArrayList is a dynamic-size data structure in Java.
• Array has a fixed length, while ArrayList can grow dynamically.

• Array can store both primitive types and objects, while ArrayList can only store objects.

• Array uses square brackets [] for declaration, while ArrayList uses angle brackets <>.

• Array provides direct access to elements using index, while ArrayList provides metho...read more
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Q5. Explain working of Arraylist.
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ArrayList is a dynamic array that can grow or shrink in size. It stores objects and provides methods for adding, removing, and accessing elements.
• ArrayList is part of the Java Collections Framework.

• It is implemented as a resizable array.

• Elements can be added using the add() method.

• Elements can be accessed using the get() method.

• Elements can be removed using the remove() method.

• The size() method returns the number of el...read more
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Q6. What is the default size of an arraylist.
Ans. 
The default size of an ArrayList is 10.
• The default initial capacity of an ArrayList is 10.

• If the number of elements exceeds the initial capacity, the ArrayList automatically increases its size.

• The capacity of an ArrayList can be increased manually using the ensureCapacity() method.
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Q7. Some questions from my resume about my previous experience.
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Q8. The interviewer was stupid and in my opinion they are just wasting your precious time. After the interview they don't provide any updates about the interview.
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Q1. Java 8, stream api, spring boot
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Q1. Java 8 ,stream api , Microservice, spring boot ,
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Q1. Stream api program,duplicate character find in given string how many way you can solve this problem, puzzles 25 horses
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Q1. How to improve performance issue your application,How to find proformance problem in system, How to join us
Ans. 
To improve performance in an application, identify performance problems and join our team.
• Analyze application code and identify bottlenecks

• Use profiling tools to measure performance

• Optimize database queries and improve indexing

• Implement caching mechanisms

• Upgrade hardware or infrastructure if necessary

• Join our team to collaborate on performance improvements
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