Egon Zehnder International Digital Trainee Interview Questions and Answers

Q1. Oops and dbms were asked
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Q2. All oops concepts were asked
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Q1. HVAC, FLS & Experience
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Q1. Software Proficiency Test
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Q1. Lifecycle hooks of Angular
Ans. 
Angular lifecycle hooks are methods that allow you to tap into specific points in a component's lifecycle.
• ngOnChanges: called when an input property changes

• ngOnInit: called once the component is initialized

• ngDoCheck: called during every change detection run

• ngAfterContentInit: called after content (ng-content) has been projected into the component

• ngAfterContentChecked: called after every check of the projected content

• ng...read more
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Q2. SOLID principles
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Q1. Questions on SQL
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Q1. Introduction and basic questions
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4 problems 2 easy 2 meds

Q1. Problem solving
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Q2. Why you choose bcg
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Q3. Case study what is it
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Q1. Asked about SAAS, JS questions
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Given a case study need to solve in 2 days

Q1. Explain the case study. Palindrome function in any prog language
Ans. 
A palindrome function checks if a given string reads the same forwards and backwards.
• A palindrome function typically involves reversing the input string and comparing it to the original string.

• Examples: 'racecar' is a palindrome, 'hello' is not a palindrome.

• Common languages for implementing a palindrome function include Python, Java, and C++.
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Q1. General Guidelines
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Q1. About Project and expertise
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Q2. Why BCG?
Ans. 
BCG offers a challenging and innovative work environment with opportunities for growth and development.
• BCG is known for its cutting-edge technology and innovative projects

• Opportunities for professional growth and development

• Strong company culture focused on collaboration and teamwork
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Q1. Polymorphism, OS Deadlock
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Q1. More about how to resolved code merge issue in Git
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Q1. How does Django apply migrations to the database?
Ans. 
Django applies migrations to the database using the 'manage.py migrate' command.
• Django tracks changes to models and generates migration files accordingly.

• The 'manage.py makemigrations' command creates migration files based on model changes.

• The 'manage.py migrate' command applies the generated migration files to the database.

• Migrations help keep the database schema in sync with the changes in Django models.
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Q2. What is hoisting in javascript?
Ans. 
Hoisting in JavaScript is the behavior where variable and function declarations are moved to the top of their containing scope during the compilation phase.
• Variable declarations are hoisted to the top of their scope, but not their assignments.

• Function declarations are fully hoisted, meaning they can be called before they are declared.

• Hoisting can lead to unexpected behavior if not understood properly.
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Create a full stack application in 3 days.

This round includes an assignment which needs to be completed based on Java, Springboot, REST and any Frontend. They evaluated the case study based on how I write the APIs, how normalised my database is, and how user friendly the UI is.

Q1. How will you add pagination in Spring Boot JPA query?
Ans. 
Use Spring Data JPA's Pageable interface to add pagination in queries.
• Use Pageable interface in repository method signature

• Pass PageRequest object with page number, size, and sorting criteria

• Example: public List findAllUsers(Pageable pageable);
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