Wissen Technology Senior Principal Engineer Interview Questions and Answers

Q1. Create a calculator
Ans. 
A basic calculator that can perform addition, subtraction, multiplication, and division.
• Create functions for each operation (addition, subtraction, multiplication, division)

• Take user input for numbers and operation choice

• Display the result of the calculation
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Q2. Details about current project
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Q1. .Net core and Azure
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Q2. Scenario based questions
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Regex and aptitude discussion

Q1. Expectations asked
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Q1. Basic ruby questions
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Q1. Some deep questions in ruby
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Use case was given to solve

Q1. This was client round , asked about coding solution and asked to write specs
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Q1. Basic HR questions
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Q1. What is volatile how to use gdb what is singleton
Ans. 
Questions on volatile, gdb usage, and singleton pattern.
• Volatile is a keyword in C that tells the compiler not to optimize the variable.

• GDB is a debugger tool used to analyze and debug code during runtime.

• Singleton is a design pattern that restricts the instantiation of a class to one object.

• To use GDB, compile the code with the -g flag, run the executable with gdb, set breakpoints, and use commands like 'next' and 'pr...read more
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Q1. Spring boot scenario. Write controller and rest of the required classes
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Create a Spring Boot controller and required classes for a scenario
• Create a controller class with @RestController annotation

• Define request mapping for different endpoints using @RequestMapping or @GetMapping/@PostMapping annotations

• Implement methods to handle different HTTP requests and return appropriate responses

• Use @Autowired annotation to inject dependencies like services or repositories

• Create service classes to ha...read more
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Q2. Java 8 , stream apis
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Q1. 1. What is a loop in switching? 2. How do you say vlan 200 working on switch? 3. How do you say ethernet frame is tagged or untagged? 4. Regarding project 5. Python string slicing 6. Max vlans allowed on s...read more
Ans. 
Technical questions related to switching, VLANs, and Python string slicing for Lead Engineer position.
• A loop in switching occurs when a broadcast packet is forwarded endlessly between switches.

• To say VLAN 200 is working on a switch, you can check the VLAN database or use the show vlan command.

• An ethernet frame is tagged when it has a VLAN ID added to its header, and untagged when it does not.

• Regarding the project, prov...read more
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