Citicorp Senior Engineer Interview Questions and Answers

Q1. Project related
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Q1. Scenario based question on kafka
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Q1. Hadoop basics on computing
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Q2. Distribution basics for processing the data
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Q1. Architecture of bigdata systems
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Bigdata systems architecture involves distributed storage, processing, and analysis of large volumes of data.
• Utilize distributed file systems like HDFS for storage

• Use parallel processing frameworks like Apache Spark or Hadoop for data processing

• Implement data pipelines for ETL processes

• Leverage NoSQL databases like Cassandra or MongoDB for real-time data querying

• Consider data partitioning and replication for fault tole
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Q2. How will the bigdata system distribution for storage andcompute happen
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Big data system distribution for storage and compute involves partitioning data across multiple nodes for efficient processing.
• Data is partitioned across multiple nodes to distribute storage and processing load.

• Hadoop Distributed File System (HDFS) is commonly used for storage distribution.

• Apache Spark utilizes a cluster computing framework for distributed computing.

• Data locality is important to minimize data transfer ...read more
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It was good but prepared on technical basis

Q1. What is primary key
Ans. 
Primary key is a unique identifier for each record in a database table.
• Primary key ensures each record in a table is unique

• It can be a single column or a combination of columns

• Primary key values cannot be NULL

• Example: In a table of students, student ID can be a primary key
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Q2. What is foreign key
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Foreign key is a column or a set of columns in a table that uniquely identifies a row in another table.
• A foreign key establishes a relationship between two tables in a database.

• It ensures referential integrity by enforcing a link between the data in the two tables.

• Foreign key constraints prevent actions that would destroy links between tables, such as deleting a row that is referenced by another table.

• Example: In a dat...read more
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General apti questions

Work-life balance and career progression

Work and distance, work and time

SQL server and manual test and Java

Number system and rational and proportion

Clarity on manual test and Java class

Q1. What is the software
Ans. 
Software is a set of instructions that tells a computer what to do.
• Software is a collection of programs, data, and instructions that tell a computer how to perform specific tasks.

• It can be categorized into system software, application software, and middleware.

• Examples of software include Microsoft Office, Adobe Photoshop, and Google Chrome.
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Q2. What is the white Box testing
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White Box testing is a software testing technique that examines the internal structure and implementation of the system.
• White Box testing is also known as Clear Box testing, Glass Box testing, or Structural testing.

• It involves testing the code, logic paths, and internal components of the software.

• Test cases are designed based on the knowledge of the internal structure of the system.

• It helps in identifying errors, code ...read more
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Q3. What is the software testing
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Software testing is the process of evaluating a software application or system to ensure it meets the specified requirements.
• Software testing is done to identify defects or errors in the software.

• It involves executing the software with test cases and comparing the actual results with expected results.

• Different types of testing include unit testing, integration testing, system testing, and acceptance testing.

• Testing can...read more
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Q1. How do you Structure Database? Make Design ?
Ans. 
A well-structured database design is crucial for efficient data management.
• Identify entities and their relationships

• Normalize data to reduce redundancy

• Choose appropriate data types and constraints

• Consider performance and scalability

• Document the design and update as needed
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Q2. Ask about Low Level Design?
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Q1. Basic & Advance concepts of .NET & SQL
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Q2. OOPs basics, Linq, jQuery, Javascript
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Q1. Basic discussion about your previous company & salary negotiation etc.
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