TD Bank Java Developer Interview Questions and Answers

25 MCQs mainly on core java, design patterns, synchronization

Q1. Given an assignment to write program on Fibonacci series, String palindrome Threads in Java, Java Streams
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Q2. Questions about data structures and collection API
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Java and sql questions

Q1. Basics of java ans core java
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Q1. Java related questions
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Q2. Microservices related questions
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It was spring boot java based online round

Q1. Optional in java.
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Q2. Eager and lazy initialization in simgleton design pattern
Ans. 
Eager initialization creates the instance of Singleton class at the time of class loading, while lazy initialization creates the instance only when it is required.
• Eager initialization can lead to resource wastage if the instance is never used.

• Lazy initialization is more efficient as it only creates the instance when needed.

• Eager initialization is thread-safe by default, while lazy initialization requires synchronizatio...read more
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Q1. Rest api questions
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Q2. Core java and springboot
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Q1. Why string is immutable
Ans. 
String is immutable in Java to ensure thread safety, security, and optimization.
• Immutable strings are thread-safe as they cannot be modified concurrently by multiple threads.

• String pooling is possible due to immutability, saving memory and improving performance.

• Security is enhanced as sensitive information stored in strings cannot be altered.

• Examples: String str = "Hello"; str.concat(" World"); // str remains "Hello"
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Q2. What is spring aop
Ans. 
Spring AOP (Aspect-Oriented Programming) is a framework that provides cross-cutting concerns in a modular way.
• Spring AOP allows separating cross-cutting concerns from the main application logic.

• It enables developers to define aspects (cross-cutting concerns) separately and apply them to multiple classes.

• Examples of cross-cutting concerns include logging, security, and transaction management.
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Discussion and analysis on Java and System Design followed by DSA which was a live coding session.

Q1. The java Developer role interview questions for DB are below: 1. Collections and its differences 2. Hashmap vs Concurrent hashmap 3. Stereotypes in spingboot 4. Controller vs RestController 5. Idempottent ...read more
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