Illumina Senior Software Developer Interview Questions and Answers

Q1. Questions on OOPs concepts
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Q2. Software development life cycle
Ans. 
Software development life cycle is a process used by software developers to design, develop, test, and deploy software applications.
• SDLC consists of several phases such as planning, analysis, design, implementation, testing, and maintenance.

• Each phase has its own set of activities and deliverables to ensure the successful completion of the project.

• Examples of SDLC models include Waterfall, Agile, Scrum, and DevOps.

• SDLC...read more
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Two coding questions. One using quick sort. The other one was for prime numbers

Q1. How to reverse two numbers without using temp variable
Ans. 
To reverse two numbers without using a temp variable, use bitwise XOR operation.
• Use bitwise XOR operation to swap two numbers without using a temp variable.

• Example: a = 5, b = 7. a = a XOR b, b = a XOR b, a = a XOR b. After this, a = 7, b = 5.
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Q1. Why do you want to join Thermo Fisher
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I want to join Thermo Fisher because of their reputation for innovation and impact in the scientific community.
• Thermo Fisher is a leader in the scientific research and healthcare industry

• I am impressed by their commitment to innovation and cutting-edge technology

• I believe working at Thermo Fisher will provide me with opportunities for professional growth and development
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Q1. C++ related basic questions
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Q1. C++ and project related advanced questions
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Q1. Tell me about yourself.
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Q1. Practice writing delegates,events,static,private constructors practice questions on array like find duplicates in array, polymorphism,abstraction,encapsulation,singleton,factory pattern code
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Q1. Write a code similar to hackerrank test
Ans. 
Code similar to HackerRank test
• Create an array of strings for test cases

• Write code to evaluate each test case

• Compare output with expected output

• Return results
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Q2. Array data structure
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Q1. Managerial questions
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Q2. Same managerial round scrum,agile what it is
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Q1. 1. OOPS questions 2. SOLID and Design Pattern questions 3. Project explanation 4. Basic Pattern coding 5. Test question, UTest, ITest
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Q2. Resume discussion and question from resume skill set.
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Q1. 1. Design qestion. 2. Design pattern uses per use case.
Ans. 
Design patterns are used to solve common software design problems. Each use case requires a specific pattern.
• Design patterns are reusable solutions to common software design problems.

• Each use case requires a specific pattern to be used.

• Examples of design patterns include Singleton, Factory, and Observer.

• The choice of pattern depends on the problem being solved and the requirements of the system.
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Q1. Managerial round 1. Reason to switch. 2. Immediate joining 3. Conflict management with manager
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Q1. Salary negotiation and joining date.
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Basic problem solving easy to medium level

Q1. Coding questions based on loops, arrays
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Q1. Coding a sorting algorithm
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Sorting algorithm arranges elements in a specific order.
• Choose an appropriate sorting algorithm based on the data size and type.

• Common sorting algorithms include bubble sort, insertion sort, merge sort, quicksort, and selection sort.

• Implement the chosen algorithm in the programming language of choice.

• Test the algorithm with various input sizes and types to ensure correctness and efficiency.
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Q1. Oops,project related,basic program
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Q1. Oops,multithreading,threads, tasks, project related,basic program
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Q1. Package details , relocation, benefits
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