CDW Senior Cloud Engineer Interview Questions and Answers

Q1. Dedendency Injection - How it's works.
Ans. 
Dependency Injection is a design pattern where the dependencies of an object are provided externally rather than created within the object itself.
• Dependencies are injected into a class through constructor injection, setter injection, or interface injection.

• This helps in achieving loose coupling between classes and makes the code more testable and maintainable.

• Example: Instead of creating an instance of a database conne...read more
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Q2. Transient vs Scoped lifetime service - if one is transient and other is Scoped will this work?
Ans. 
Yes, a combination of transient and scoped lifetime services can work together.
• Transient services are created each time they are requested, while scoped services are created once per request within the scope.

• They can work together as long as the transient service does not depend on the scoped service for its functionality.

• For example, a logging service can be transient while a database context service can be scoped.
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Q3. Async and await
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Basic java mcq, Java Hibernate Spring MVC framework questions

Question answer of 1 hour with 3 panel member

1 hour of Gd with 3 members

With some high management

Q1. About family and there job profile
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Q2. Salary expectations and discussion on structure oc the same
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Q1. Salary expectation and again explain the structure
Ans. 
I am looking for a competitive salary based on my experience and skills in the range of $100,000 to $120,000.
• Research industry standards for senior software engineer salaries

• Consider your years of experience and specialized skills

• Factor in cost of living in the area where the job is located

• Be prepared to negotiate based on benefits and perks offered
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Coding test conducted in virtual session - you need share the entire screen (google meet). Interviewer share about 12 questions, in 10 are theory based questions and 2 coding questions.
while writing theory try to answer with real time example from your project.
1. Solid principles 2 design patterns used 3 diff between .net core vs .net 4. garbage collection 5. global exception handling in core 5. performance / monitoring related questions

coding questions: 1. Nth max value without sorting. 2. sum of max sub array in a integer array

Q1. Skills, project explanation, unit testing, code review
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Q2. Usage of dependency injection in core along with types
Ans. 
Dependency injection in core with types is a common practice in software engineering.
• Dependency injection is a design pattern where components are given their dependencies rather than creating them internally.

• Using dependency injection in core allows for easier testing and maintenance of the codebase.

• Types in dependency injection help ensure that the correct dependencies are injected into components.

• Examples include us...read more
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Q3. Usage of Middleware along with custom middleware
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Middleware is used to handle requests and responses in web applications. Custom middleware can be created to add specific functionality.
• Middleware is software that acts as a bridge between an operating system or database and applications, allowing them to communicate with each other.

• Middleware can be used to handle tasks such as authentication, logging, error handling, and more.

• Custom middleware can be created to add s...read more
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Q4. Authentication and authorization in web api core
Ans. 
Authentication and authorization are essential for securing web APIs in ASP.NET Core.
• Use authentication to verify the identity of the user accessing the API.

• Use authorization to determine what actions the authenticated user is allowed to perform.

• In ASP.NET Core, authentication can be implemented using various schemes like JWT, OAuth, or Identity.

• Authorization can be achieved through policies, roles, or claims.

• Always va...read more
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Q1. Discuss 4 case study related to supply chain management.
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Round duration - 140 minutes
Round difficulty - Medium

Test timing was at 2:00 pm , it was conducted in a college and the environment was good for the test. Camera was a primary part of test, so no suspicious activity.

Q1. 
Sum of Two Numbers Represented as Arrays
Given two numbers in the form of two arrays where each element of the array represents a digit, calculate the sum of these two numbers and return this sum as an ar...read more
Ans. 
Given two numbers represented as arrays, calculate their sum and return the result as an array.
• Iterate through the arrays from right to left, adding digits and carrying over if necessary

• Handle cases where one array is longer than the other by considering the remaining digits

• Ensure the final sum array does not have any leading zeros
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Round duration - 20 minutes
Round difficulty - Easy

The round was conducted at around 12 p.m. I was called at the college location and then it was conducted. The interviewer was quite polite and frank.

Round duration - 8 minutes
Round difficulty - Easy

This round was conducted right after finishing and clearing the technical round at the same place and on the same day.