Tandem Data Processing Java Programmer Interview Questions and Answers

Q1. Name some plugin for SEO in wordpress
Ans. 
Some popular SEO plugins for WordPress include Yoast SEO, All in One SEO Pack, and Rank Math.
• Yoast SEO is one of the most popular SEO plugins for WordPress, offering features like XML sitemap generation, meta tag optimization, and content analysis.

• All in One SEO Pack is another widely used plugin that provides similar features to Yoast SEO, such as XML sitemap support and meta tag optimization.

• Rank Math is a newer SEO ...read more
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Q1. What is difference between method and constructor
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Methods are functions within a class that perform specific tasks, while constructors are special methods used to initialize objects.
• Methods can be called multiple times, constructors are called only once during object creation

• Methods have return types, constructors do not have return types

• Constructors have the same name as the class, methods have unique names
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Q2. Increment operator
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Q3. Architeture of jvm
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Q1. Java hashmap, java collection, generics
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Q1. Spoke about the company, salary, tech stack, and many more.
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Q1. Tell me about your self.
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Q2. Why do you join this company.
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Q3. What is Oops concepts in java.
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Q4. What is exception handling.
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Q1. Difference between SQL and PL/SQL
Ans. 
SQL is a standard language for managing relational databases, while PL/SQL is Oracle's proprietary extension for SQL with procedural features.
• SQL is a standard language used to manage and manipulate relational databases.

• PL/SQL is Oracle's proprietary extension to SQL that adds procedural programming capabilities.

• SQL is used for querying and updating data, while PL/SQL is used for writing stored procedures, functions, a...read more
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Q2. What is trigger
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A trigger is a special kind of stored procedure that is automatically executed when certain events occur in a database.
• Triggers can be used to enforce business rules, perform data validation, or automate tasks.

• Examples of trigger events include INSERT, UPDATE, and DELETE operations on a table.

• Triggers can be defined to execute before or after the triggering event.
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Q1. Questions on vlook up, h-look up, pivot and if else condition
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Q2. You must know how to use vlook up, h-look up and if-else condition
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Excel file was give, used sumifs, countifs , index match formulas

Q1. What is invoke controller?
Ans. 
Invoke controller is a component in a software application that manages the flow of requests and responses between the user interface and the backend services.
• Manages the communication between user interface and backend services

• Handles the routing of requests to appropriate functions or methods

• Coordinates the flow of data and actions within the application
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Q2. What is facade in laravel?
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Facade in Laravel is a design pattern that provides a simple interface to a complex subsystem.
• Facade provides a static interface to classes that are available in the application's service container.

• It is used to simplify the usage of complex classes by providing a simpler interface.

• Facade allows you to access Laravel's features without needing to instantiate objects or use dependency injection.

• Example: The Auth facade ...read more
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45 min, general aptitude questions

Group discussion and case study on demonetisation

Q1. Confidence testing questions
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Q2. Technical related questions
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