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Citibank Java Full Stack Developer Interview Questions and Answers
Citibank Java Full Stack Developer Interview Experiences
1 interview found
I applied via Naukri.com and was interviewed in Jan 2022. There were 5 interview rounds.
(1 Question)
- Q1. Typical theory questions realted to Java colllection, Java memory management, spring.
(1 Question)
- Q1. Questions in this round were more related to nitty gritty of Java and spring, like what will happen if you just overrride equals and not hashcode, what will happend if you swap stereotype annotations,
(1 Question)
- Q1. Explaining current project and some easy questions on it. Chit chat about team and working condition
(1 Question)
- Q1. In this round someone from a different team that you will be joining will ask technical question of easy to medium degree of difficulty related to Java, angular and spring
(1 Question)
- Q1. Typical questions on DOJ salary, wfh etc
Interview Preparation Tips
Top trending discussions
Interview questions from similar companies
Java Full Stack Developer Interview Questions & Answers
Deutsche Bank
Anonymous
posted on 7 May 2024
I applied via Naukri.com and was interviewed in Apr 2024. There were 2 interview rounds.
(6 Questions)
- Q1. Java 8 Features
- Q2. Default Interface
- Q3. Write code for Builder/Factory Pattern, basically anything other than Singleton
- Ans.
Builder/Factory Pattern is used to create objects with complex initialization logic.
Builder Pattern separates the construction of a complex object from its representation.
Factory Pattern creates objects without specifying the exact class of object that will be created.
Builder Pattern is often used to create immutable objects with many optional parameters.
Factory Pattern is used when there is a need to create multiple i...
- Q4. Why is Redux used in React
- Ans.
Redux is used in React to manage the application state in a predictable way.
Centralized state management for React applications
Predictable state changes with actions and reducers
Easier debugging and testing of state changes
Facilitates communication between components
- Q5. Second Highest Salary from Employee Table
- Q6. Filter a List using Streams
- Ans.
Filter a List using Streams in Java
Use the filter() method to apply a predicate to each element in the stream
Use collect() method to convert the stream back to a List
Example: List
names = Arrays.asList("Alice", "Bob", "Charlie"); List filteredNames = names.stream().filter(name -> name.startsWith("A")).collect(Collectors.toList());
(7 Questions)
- Q1. Write snippet for creating an Entity Class.
- Ans.
Creating an Entity Class in Java
Define class with @Entity annotation
Add @Id annotation for primary key
Include fields with appropriate data types
- Q2. Different Types of Autowiring
- Ans.
There are three types of autowiring in Spring: byType, byName, and constructor.
byType: Spring looks for a bean of the same type and injects it.
byName: Spring looks for a bean with the same name and injects it.
constructor: Spring looks for a constructor and injects the arguments.
- Q3. Lazy vs Eager Fetch
- Ans.
Lazy fetch loads data only when needed, while eager fetch loads all related data upfront.
Lazy fetch is more efficient for performance as it only loads data when required.
Eager fetch can lead to performance issues by loading unnecessary data upfront.
Lazy fetch is the default behavior in JPA, while eager fetch needs to be explicitly specified.
Example: Lazy fetch can be used for loading a list of items in a shopping cart ...
- Q4. Transaction Management in Hibernate
- Ans.
Transaction management in Hibernate ensures ACID properties for database operations.
Hibernate provides built-in transaction management support through Session interface.
Transactions can be managed programmatically using beginTransaction(), commit(), and rollback() methods.
Hibernate also supports declarative transaction management using annotations like @Transactional.
Transactions in Hibernate ensure Atomicity, Consiste...
- Q5. Attached Entity vs Detached Entity
- Ans.
Attached entities are actively managed by the persistence context, while detached entities are no longer actively managed.
Attached entities are being managed by the persistence context and any changes made to them will be automatically synchronized with the database.
Detached entities are not being managed by the persistence context and changes made to them will not be automatically synchronized with the database.
Entiti...
- Q6. Write Snippet to create two beans
- Ans.
Creating two beans in Java using Spring framework
Use @Component annotation to define a bean
Specify the bean name using @Component("beanName")
Use @Autowired annotation to inject one bean into another
- Q7. Sort an Employee HashMap
- Ans.
Sort an Employee HashMap based on keys or values
Use TreeMap to automatically sort by keys
Use Comparator to sort by values
Convert HashMap to List and then sort
Interview Preparation Tips
- Spring Framework
Skills evaluated in this interview
Java Full Stack Developer Interview Questions & Answers
Deutsche Bank
Anonymous
posted on 7 May 2024
I applied via Naukri.com and was interviewed in Apr 2024. There were 2 interview rounds.
(6 Questions)
- Q1. Java 8 Features
- Q2. Default Interface
- Q3. Write code for Builder/Factory Pattern, basically anything other than Singleton
- Ans.
Builder/Factory Pattern is used to create objects with complex initialization logic.
Builder Pattern separates the construction of a complex object from its representation.
Factory Pattern creates objects without specifying the exact class of object that will be created.
Builder Pattern is often used to create immutable objects with many optional parameters.
Factory Pattern is used when there is a need to create multiple i...
- Q4. Why is Redux used in React
- Ans.
Redux is used in React to manage the application state in a predictable way.
Centralized state management for React applications
Predictable state changes with actions and reducers
Easier debugging and testing of state changes
Facilitates communication between components
- Q5. Second Highest Salary from Employee Table
- Q6. Filter a List using Streams
- Ans.
Filter a List using Streams in Java
Use the filter() method to apply a predicate to each element in the stream
Use collect() method to convert the stream back to a List
Example: List
names = Arrays.asList("Alice", "Bob", "Charlie"); List filteredNames = names.stream().filter(name -> name.startsWith("A")).collect(Collectors.toList());
(7 Questions)
- Q1. Write snippet for creating an Entity Class.
- Ans.
Creating an Entity Class in Java
Define class with @Entity annotation
Add @Id annotation for primary key
Include fields with appropriate data types
- Q2. Different Types of Autowiring
- Ans.
There are three types of autowiring in Spring: byType, byName, and constructor.
byType: Spring looks for a bean of the same type and injects it.
byName: Spring looks for a bean with the same name and injects it.
constructor: Spring looks for a constructor and injects the arguments.
- Q3. Lazy vs Eager Fetch
- Ans.
Lazy fetch loads data only when needed, while eager fetch loads all related data upfront.
Lazy fetch is more efficient for performance as it only loads data when required.
Eager fetch can lead to performance issues by loading unnecessary data upfront.
Lazy fetch is the default behavior in JPA, while eager fetch needs to be explicitly specified.
Example: Lazy fetch can be used for loading a list of items in a shopping cart ...
- Q4. Transaction Management in Hibernate
- Ans.
Transaction management in Hibernate ensures ACID properties for database operations.
Hibernate provides built-in transaction management support through Session interface.
Transactions can be managed programmatically using beginTransaction(), commit(), and rollback() methods.
Hibernate also supports declarative transaction management using annotations like @Transactional.
Transactions in Hibernate ensure Atomicity, Consiste...
- Q5. Attached Entity vs Detached Entity
- Ans.
Attached entities are actively managed by the persistence context, while detached entities are no longer actively managed.
Attached entities are being managed by the persistence context and any changes made to them will be automatically synchronized with the database.
Detached entities are not being managed by the persistence context and changes made to them will not be automatically synchronized with the database.
Entiti...
- Q6. Write Snippet to create two beans
- Ans.
Creating two beans in Java using Spring framework
Use @Component annotation to define a bean
Specify the bean name using @Component("beanName")
Use @Autowired annotation to inject one bean into another
- Q7. Sort an Employee HashMap
- Ans.
Sort an Employee HashMap based on keys or values
Use TreeMap to automatically sort by keys
Use Comparator to sort by values
Convert HashMap to List and then sort
Interview Preparation Tips
- Spring Framework
Skills evaluated in this interview
Selected
I applied via Recruitment Consulltant
Java OPPS, JavaScript, HTML, SQL Questions / 1 Hour
(1 Question)
- Q1. Project, Design, Tools, Framework, Coding Stuff
(1 Question)
- Q1. The most difficult challenges faced, situation-based approach, dealing with ambiguous requirements
- Ans.
Dealing with ambiguous requirements and difficult challenges in a situation-based approach.
Identifying and clarifying ambiguous requirements through effective communication
Breaking down complex problems into smaller, manageable tasks
Adapting to changing priorities and tight deadlines
Collaborating with team members to brainstorm solutions
Using critical thinking and problem-solving skills to find innovative solutions
Mana...
(1 Question)
- Q1. Puzzles, Probability, Maths BrainTeasers, Conflict Situation Response, Dare Stapes
(1 Question)
- Q1. Standard Norms Question, Salary Expection, Reason for Change, culture fit questions
(3 Questions)
- Q1. What is transactional annotation in spring ?
- Ans.
Transactional annotation in Spring is used to define the scope of a transaction.
Transactional annotation is used to mark a method or a class as transactional.
It ensures that all the operations within the annotated method or class are executed within a single transaction.
If an exception occurs, the transaction is rolled back.
Transactional annotation can be applied at the method level or class level.
It provides various a...
- Q2. What is cache in spring?
- Ans.
Cache in Spring is a mechanism to store frequently accessed data in memory for faster retrieval.
Cache improves application performance by reducing the load on the database.
Spring provides caching support through annotations like @Cacheable, @CachePut, and @CacheEvict.
Caches can be configured with different eviction policies, such as LRU or FIFO.
Example: @Cacheable annotation can be used to cache the result of a method
- Q3. It stores the data in cache, where checks the dup
Skills evaluated in this interview
Full Stack Developer Interview Questions & Answers
Standard Chartered
CodingNinjas
posted on 27 Oct 2021
I was interviewed in Aug 2021.
(1 Question)
Round duration - 30 minutes
Round difficulty - Medium
It was in the morning. We had to complete 1 coding question in given time limit
- Q1. Most Frequent Word
You are given a paragraph that may have letters both in lowercase and uppercase, spaces, and punctuation. You have also given a list of banned words. Now your task is to find the most fr...
- Ans. Brute Force
- To find the frequency of each word we need to extract the words from the paragraph.
- So we will convert all the punctuation to space in the paragraph and lowercase alphabets to uppercase.
- Now we can use the library function (e.g sstream in C++) to extract words from the paragraph in an array of strings say WORDS.
- We will iterate over WORDS and do:
- Iterate over the banned array and check if the current word is pre...
(3 Questions)
Round duration - 60 minutes
Round difficulty - Hard
Interviewer was friendly. He asked 2 coding questions and some fullstack questions.
- Q1. Ways To Make Coin Change
You are given an infinite supply of coins of each of denominations D = {D0, D1, D2, D3, ...... Dn-1}. You need to figure out the total number of ways W, in which you can make a cha...
- Ans. Recursion
- The idea is to use recursion.
- For a particular coin, we have two options either include it or exclude it.
- If we include that coin, then calculate the remaining number that we have to generate so recur for that remaining number.
- If we exclude that coin, then recur for the same amount that we have to make.
- Our final answer would be the total number of ways either by including or excluding.
- There will be two edg...
- Q2. The Skyline Problem
You are given 'N' rectangular buildings in a 2-dimensional city. Your task is to compute the skyline of these buildings, eliminating hidden lines return the skyline formed by th...
- Ans. Brute Force
The idea here is to first, sort the critical POINTS with respect to their coordinate and height pairs. Make a pair of 'X1' and take a negative of the height for the building so that 'X1' pairs are sorted before 'X2' pairs. Create a dictionary keeping the heights as keys and as soon as a left edge of a building is encountered, we add that building to the dictionary with its height as the key. When we encounte...
- Q3. Technical Questions
What is DOM?
What are indexes in database.
What is the difference between stored functions and procedures?
Interview Preparation Tips
Tip 1 : Practice coding questions
Tip 2 : Try to research about previous interview questions
Tip 1 : Prepare the resume as per the job
Tip 2 : Write in a clear manner
Skills evaluated in this interview
Selected
I applied via Campus Placement and was interviewed before Dec 2021. There were 4 interview rounds.
Not every process has aptitude but for IT departments and technical team ask for aptitude test
(1 Question)
- Q1. If fresher then you must know about the company and some banking terminology. If applying for specific role then you must carry knowledge of that subject.
(1 Question)
- Q1. They will discuss about norms and salary structure
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