Aptiv Embedded Developer Interview Questions, Process, and Tips

Test contains English, logical, quant questions

Coding Mcqs on different subjects

Q1. What are storage class specifiers in c?
Ans. 
Storage class specifiers in C are used to define the scope and lifetime of variables.
• There are four storage class specifiers in C: auto, register, static, and extern.

• Auto variables are local to a block and have automatic storage duration.

• Register variables are stored in CPU registers for faster access.

• Static variables have a lifetime throughout the program and are initialized only once.

• Extern variables are declared in ...read more
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Q2. What does preprocessor do in c?
Ans. 
Preprocessor in C is a tool that processes source code before compilation.
• It performs macro substitution

• It includes header files

• It conditionally compiles code

• It defines constants and symbols

• It removes comments

• Examples of preprocessor directives are #include, #define, #ifdef, #ifndef, #endif

• Preprocessor directives start with a # symbol
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Q3. What is Interrupt service routine?
Ans. 
An Interrupt Service Routine (ISR) is a function that is executed in response to an interrupt signal.
• ISR is a type of callback function that handles interrupts

• It is a low-level function that runs in response to a hardware event

• ISR must be short and fast to avoid blocking other interrupts

• Examples of interrupts include keyboard input, timer events, and hardware errors
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Q4. What are different interrupts?
Ans. 
Interrupts are signals sent to the processor to temporarily halt its current task and execute a specific task.
• Hardware interrupts - generated by external devices

• Software interrupts - generated by software programs

• Maskable interrupts - can be disabled by the processor

• Non-maskable interrupts - cannot be disabled by the processor

• Examples - keyboard input, mouse input, timer interrupts, etc.
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