IDBI Intech Limited Assistant Manager Operations Interview Questions and Answers

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 methods for...read more
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Q5. Explain working of Arraylist.
Ans. 
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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One coding question with 40-45 mcq

Q1. 2 coding questions from array
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Q2. In given array find the sum a*a+b*b=c*c
Ans. 
Use a nested loop to iterate through the array and check for the sum of squares of two elements equal to the square of a third element.
• Iterate through the array using a nested loop to compare all possible combinations of elements.

• Calculate the sum of squares of two elements and check if it equals the square of a third element.

• Return the elements if a match is found, otherwise continue iterating.
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Q1. Core java questions, springboot, one string coding question
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Contiguous array in java

Q1. Microservices architecture
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Q2. Saga design pattern
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