BrahMos Aerospace System Engineer Interview Questions and Answers

Basic c Programming and Embedded Systems

Q1. C and Do-178b questions
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Q1. C and Embedded system and Project related
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Q1. Manager Round, Mostly technical
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Q1. Package discussion and my previous employer details
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Q1. How to choose mosfet
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Choose a MOSFET based on voltage, current, power dissipation, switching speed, and package type.
• Consider voltage and current requirements

• Look at power dissipation and thermal considerations

• Evaluate switching speed needed for the application

• Choose the appropriate package type for mounting and heat dissipation

• Check for additional features like built-in protection circuits

• Example: For high power applications, choose a MOS
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It is like gate exam paper more of electronics questions than programming languages. Here the programming language is c and embedded

Q1. Basic level questions on c but indepth discussion on the academic projects.
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Q2. Explain Compilation stages
Ans. 
Compilation stages involve preprocessing, compilation, assembly, linking, and loading.
• Preprocessing: Includes expanding macros, handling conditional compilation, and file inclusion.

• Compilation: Translates source code into assembly code or machine code.

• Assembly: Converts assembly code into object code.

• Linking: Combines multiple object files and libraries into a single executable.

• Loading: Loads the executable into memory
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Q3. Logics on bit wise operators
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Bitwise operators are used to perform operations at the bit level on binary numbers.
• Bitwise AND (&) - sets a bit to 1 only if both input bits are 1

• Bitwise OR (|) - sets a bit to 1 if either input bit is 1

• Bitwise XOR (^) - sets a bit to 1 if the input bits are different

• Bitwise NOT (~) - inverts all the bits

• Left shift (<<) - shifts the bits to the left by a specified number of positions

• Right shift (>>) - shifts the bits
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Q4. Understanding of pointers
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Pointers are variables that store memory addresses of other variables in programming languages like C and C++.
• Pointers are used to store memory addresses of variables.

• They allow direct manipulation of memory locations.

• Pointers can be used to pass variables by reference.

• Example: int *ptr; ptr = # *ptr = 10; // num now equals 10
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Q5. Volatile and non volatile keywords
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Q1. Differentiate between RISC and CISC
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RISC stands for Reduced Instruction Set Computing and CISC stands for Complex Instruction Set Computing.
• RISC processors have a smaller set of simple instructions, while CISC processors have a larger set of complex instructions.

• RISC processors typically execute instructions in one clock cycle, while CISC processors may require multiple clock cycles.

• RISC processors rely on optimizing compilers for performance, while CISC...read more
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Q2. Define and differentiate interpreter and compiler
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Interpreter translates code line by line while compiler translates entire code at once.
• Interpreter: translates code line by line, slower execution, easier debugging (e.g. Python)

• Compiler: translates entire code at once, faster execution, harder debugging (e.g. C++)
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Q1. Javascript basics, Easy to Medium coding problems
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Q1. React server side vs client side
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React server side rendering generates HTML on the server while client side rendering generates HTML on the browser.
• Server side rendering is better for SEO and initial page load time

• Client side rendering is better for interactivity and dynamic content

• Server side rendering requires more initial setup and configuration

• Client side rendering can be easier to develop and maintain
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Q2. Convert class based component to functional component
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To convert a class based component to functional component, we need to remove the class syntax and use hooks instead.
• Remove the class syntax and replace it with a function

• Remove the render method and return the JSX directly

• Replace this.props with props

• Use useState hook to manage state

• Use useEffect hook to manage lifecycle methods
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Q3. SQL easy to medium questions
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Q1. Manager round. Discussion about the current project that you are working, technical implementation using AWS
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Q2. Behavioural questions
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Q1. Behavioural questions
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