IDFC FIRST Bank Java Developer Interview Questions and Answers

Basics , maths and general reasoning along with management

GD had 6 members , topic was given on the spot

Q1. What was the last new you heard about us?
Ans. 
I heard that your company recently launched a new product.
• The company launched a new product

• The product is receiving positive reviews

• The product is expected to increase company revenue
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Q2. How will you handle xyz ?
Ans. 
I will handle xyz by following a systematic approach and seeking guidance from experienced colleagues.
• I will gather all relevant information about xyz to understand the situation better.

• I will consult with experienced colleagues or supervisors to seek their guidance and expertise.

• I will develop a plan of action based on the information and guidance received.

• I will execute the plan while keeping track of progress and ma...read more
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Aptitude questions consists of English, maths ,non verbal, general knowledge, ms office, behaviour round

You have to talk about a topic that they will mention and also discuss it with other members of gd, you need to have fluent communication, topic would be anonymous

Q1. Basic he questions And questions related to your hobbies Basic Banking questions General knowledge
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Q2. Ministers of India How to open a bank account What is e commerce
Ans. 
Opening a bank account requires valid identity and address proof. E-commerce refers to buying and selling goods online.
• To open a bank account, visit the bank with valid identity and address proof documents

• Fill out the account opening form and submit the required documents

• Once the account is opened, you can start depositing and withdrawing money

• E-commerce refers to the buying and selling of goods and services online

• Exam...read more
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There is a general banking paper, which was of moderate level.

Group discussion includes the situation bases questions which are really easy.

Basic aptitude questions were asked

Topic was given and there were 10 members

Q1. Question about Federal Bank
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Q2. HR questions, banking questions
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Q1. 1. Power BI, 2. SQL,
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Q2. 3. Azure and 4. Excel.
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Q1. What is one keyword which can be used so that value of variable cannot be changed
Ans. 
final keyword can be used to make a variable's value constant and unchangeable
• Use 'final' keyword before the variable declaration

• Once a variable is declared as final, its value cannot be changed

• Example: final int num = 10; // value of num cannot be modified
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Q2. Have you heard about deadlock ?
Ans. 
Yes, deadlock is a situation in concurrent programming where two or more threads are waiting for each other to release resources, causing them to be stuck indefinitely.
• Deadlock occurs when two or more threads are blocked forever, waiting for each other to release resources.

• It can happen when multiple threads have locks on different resources and each thread is trying to acquire a lock held by another thread.

• Example: Th...read more
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Q3. Tell the approach to print the unique elements from a arraylist
Ans. 
Use a HashSet to store unique elements from the arraylist
• Create a HashSet and add all elements from the arraylist to it

• Since HashSet does not allow duplicates, only unique elements will be stored

• Convert the HashSet back to an arraylist if needed
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Q4. When can a conflict arise while working with git and github
Ans. 
Conflicts can arise in git and github when multiple developers make changes to the same file or branch simultaneously.
• Conflicts can occur when two developers make changes to the same line of code in a file.

• Conflicts can also arise when merging branches that have diverged and contain different changes.

• Communication among team members is crucial to avoid conflicts and resolve them efficiently.

• Using pull requests and code...read more
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Q5. Why spring has came into picture? What are the features it provides
Ans. 
Spring came into picture to simplify Java development by providing features like dependency injection, aspect-oriented programming, and transaction management.
• Spring provides dependency injection which helps in managing object dependencies and promotes loose coupling.

• It supports aspect-oriented programming for separating cross-cutting concerns like logging, security, and transaction management.

• Spring offers robust tran...read more
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Q6. What is polymorphism
Ans. 
Polymorphism is the ability of a single function or method to operate on different types of data.
• Polymorphism allows objects of different classes to be treated as objects of a common superclass.

• There are two types of polymorphism: compile-time (method overloading) and runtime (method overriding).

• Example: A superclass Animal with methods eat() and sleep(). Subclasses Dog and Cat override these methods with their own imp
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Q7. What is collection framework
Ans. 
Collection framework in Java is a set of classes and interfaces that provide a way to store and manipulate groups of objects.
• It provides a way to store, retrieve, and manipulate groups of objects.

• It includes interfaces like List, Set, and Map, and classes like ArrayList, HashSet, and HashMap.

• Collections framework simplifies the process of working with collections of objects in Java.
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Q8. Difference between map and set
Ans. 
Map is a collection of key-value pairs where keys are unique, while Set is a collection of unique elements with no duplicates.
• Map allows duplicate values but keys must be unique

• Set does not allow duplicate elements

• Map is accessed using keys, while Set is accessed using elements

• Example: Map - {1: 'apple', 2: 'banana'}, Set - {'apple', 'banana'}
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Q9. Which is best choice arraylist or linkedlist when space is not an issue?
Ans. 
ArrayList is a better choice when space is not an issue due to its constant time access, while LinkedList has better performance for insertions and deletions.
• ArrayList is better for random access as it provides constant time access to elements based on index.

• LinkedList is better for insertions and deletions as it does not require shifting elements in memory.

• Example: If you need to frequently add or remove elements in a...read more
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Q10. Do you know about javafx jsp
Ans. 
JavaFX is a software platform for creating and delivering desktop applications, while JSP is a technology used for creating dynamic web pages.
• JavaFX is used for creating rich internet applications with a modern look and feel.

• JSP is used for developing dynamic web pages with Java code embedded in HTML.

• JavaFX and JSP can be used together to create interactive web applications.
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