Analyttica Datalab Data Engineer Interview Questions and Answers

Q1. Basic java questions
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Q2. Sql related questions
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2 DSA Questions and questions from springboot for java

Q1. Build Project in springboot and asked questions from the same
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Q1. System design questions for High level design
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Q1. Behavioral round asked question about the organization.
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It was a simple assignment where you needed to implement a Django app from a well laid out documentation.

Q1. Binary Search Tree - Two nodes are swapped in a Binary Search tree and then fix them so that the tree becomes a valid BST
Ans. 
Fix two swapped nodes in a Binary Search Tree to make it valid
• Identify the two nodes that are swapped incorrectly

• Perform an inorder traversal to find the nodes that are not in ascending order

• Swap the values of the incorrectly swapped nodes to fix the BST
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Recursive program of binary tree and basic HTML bootstrap

Basic aptitude followed with english and reasoning

Q1. Core java technical questions , spring , spring boot
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Q2. What is JIT in java
Ans. 
JIT stands for Just-In-Time compilation in Java. It dynamically compiles bytecode into machine code at runtime for improved performance.
• JIT is a part of the Java Virtual Machine (JVM) that optimizes the execution of Java programs.

• It analyzes the frequently executed parts of the bytecode and compiles them into native machine code.

• This compilation happens at runtime, just before the code is executed, hence the name Just-...read more
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Q3. Explain lifecyxle of thread in java
Ans. 
The lifecycle of a thread in Java includes several stages from creation to termination.
• A thread is created using the Thread class or implementing the Runnable interface.

• The thread goes through the new, runnable, and blocked states before running.

• Once running, the thread can be paused, resumed, or stopped.

• Finally, the thread reaches the terminated state and cannot be restarted.
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This is the aptitude round in this round quant questions were asked

In this round 2 java coding questions were there

Q1. What is the framework
Ans. 
A framework is a set of rules, guidelines, and standards that provide a structure for developing software applications.
• A framework provides a common structure for developers to work within

• It includes pre-written code and libraries that can be used to speed up development

• Frameworks can be specific to a programming language or platform

• Examples include AngularJS, React, and Ruby on Rails
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Q2. What is the java explain
Ans. 
Java is a widely used programming language known for its platform independence and object-oriented approach.
• Java is an object-oriented language that follows the 'write once, run anywhere' principle.

• It is used for developing a wide range of applications, from desktop to web and mobile applications.

• Java programs are compiled into bytecode that can run on any Java Virtual Machine (JVM).

• It provides built-in libraries and f...read more
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Q1. What is your salary, tell your expectations
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Q2. What is your location
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