TransUnion Software Engineer Interview Questions and Answers

Q1. What is HashMap?
Ans. 
HashMap is a data structure that stores key-value pairs and provides constant time complexity for basic operations.
• HashMap allows quick access to values based on their keys

• Keys must be unique and values can be duplicated

• HashMap is not thread-safe and requires synchronization for concurrent access

• Java's HashMap implementation uses hashing to distribute keys across buckets
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Q2. It’s a collection framework.
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All aptitude type questions as well as core computer science subject questions comes

Profit loss , number system, code decode

Q1. What is DDL, DML, DQL
Ans. 
DDL stands for Data Definition Language, DML stands for Data Manipulation Language, and DQL stands for Data Query Language.
• DDL is used to define the structure of database objects such as tables, indexes, and views.

• DML is used to manipulate data in the database, such as inserting, updating, and deleting records.

• DQL is used to retrieve data from the database using queries.

• Examples: CREATE TABLE is a DDL statement, INSERT...read more
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Q1. Questions related to Java, Spring, Rest API
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Q1. Basic java collection questions
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Q1. Spring boot basic questions
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Q1. Why should we hire you
Ans. 
I have a strong technical background, proven track record of delivering high-quality software, and a passion for continuous learning and improvement.
• I have a Bachelor's degree in Computer Science and X years of experience in software development.

• I have successfully led multiple projects from conception to completion, delivering high-quality software on time and within budget.

• I am proficient in a variety of programming ...read more
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Q1. Java related questions
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Q2. Based on the resume
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Q1. Current time and their angles
Ans. 
The question is asking for the current time and the angles formed by the hour and minute hands on a clock.
• The angle between the hour and minute hands of a clock can be calculated using the formula: angle = |(30*hour - (11/2)*minutes)|

• At 3:00, the angle between the hour and minute hands is 90 degrees.

• At 6:00, the angle between the hour and minute hands is 180 degrees.

• At 9:00, the angle between the hour and minute hands
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Q1. Didnt qual here btw
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Q1. Didnt qual either btw
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Q1. Angular and JavaScript.
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Q1. Behavioral Questions
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Q2. CI-CD, Jenkins, AWS
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Q1. Client Interview - Security related.
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