Tata Elxsi Embedded Engineer Interview Questions, Process, and Tips

Normal basic apti lr conceptual questions

Q1. What is microcontroller? have you worked on any microcontroller? c++ basics polymorphism
Ans. 
A microcontroller is a small computer on a single integrated circuit that contains a processor core, memory, and programmable input/output peripherals.
• Microcontrollers are commonly used in embedded systems for controlling various devices and appliances.

• They are programmed using languages like C or assembly language.

• Examples of popular microcontrollers include Arduino, Raspberry Pi, and PIC.

• Microcontrollers are often us...read more
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Q2. Tell me about your project?
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Q3. Prime no. program?
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Basic c datastructucture networking l2 l3 questions

Q1. Question on projects.
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Q2. How packet goes from source to destination.
Ans. 
Packets are sent from source to destination through a series of network devices using routing protocols.
• Packet is created at the source with source and destination IP addresses.

• Packet is sent to the default gateway or router.

• Router checks its routing table to determine the next hop for the packet.

• Packet is forwarded to the next hop until it reaches the destination.

• Destination receives the packet and sends an acknowledg
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Q3. Delete a node from single linked list.
Ans. 
To delete a node from a single linked list, we need to find the node and update the pointers.
• Traverse the list to find the node to be deleted

• Update the previous node's pointer to point to the next node

• Free the memory of the node to be deleted
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Q4. Dynamic memory alocation in c
Ans. 
Dynamic memory allocation in C allows allocation of memory at runtime.
• Dynamic memory allocation is done using functions like malloc(), calloc(), realloc() and free().

• malloc() allocates memory block of specified size and returns a pointer to the first byte of allocated memory.

• calloc() allocates memory block of specified size and initializes all bits to zero.

• realloc() changes the size of previously allocated memory block...read more
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Q5. Interprocess communication in OS
Ans. 
Interprocess communication is a mechanism that allows processes to communicate with each other in an OS.
• IPC mechanisms include pipes, sockets, message queues, shared memory, and signals.

• IPC can be used for synchronization, data sharing, and coordination between processes.

• IPC can be implemented using system calls such as fork(), pipe(), socket(), and msgget().
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Q1. Linux: Explain system calls. Which system calls you used? IPC: which one you used? How to start yacto project? Diff betn process and thread. Explain I2c Difference between I2c And SPI difference between s...read more
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Q2. Explain I2c diff btn i2c and spi diff btn hw and sw interrupt
Ans. 
I2C is a serial communication protocol used to connect multiple devices with two wires. SPI is another serial protocol with four wires.
• I2C uses a master-slave architecture while SPI uses a master-master architecture.

• I2C supports multiple devices on the same bus while SPI requires a separate chip select line for each device.

• Hardware interrupts are triggered by external events while software interrupts are triggered by s
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Q1. Steps of compilation of a C program.
Ans. 
Compilation of a C program involves preprocessing, compiling, assembling, and linking.
• Preprocessing: Includes header files, macro expansions, and comments removal. Example: gcc -E program.c

• Compiling: Translates source code to assembly code. Example: gcc -S program.c

• Assembling: Converts assembly code to machine code. Example: gcc -c program.s

• Linking: Combines object files and libraries to generate executable. Example: g
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Q2. Storage classes in C
Ans. 
Storage classes in C define the scope and lifetime of variables.
• Storage classes include auto, register, static, extern, and typedef.

• Auto variables are local to the block they are declared in.

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

• Static variables retain their value between function calls.

• Extern variables are declared in one file and can be used in another.

• Typedef is used to create new data typ
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Q3. How does a computer boot up?
Ans. 
A computer boots up by executing the BIOS, loading the operating system into memory, and initializing hardware components.
• BIOS (Basic Input/Output System) is the first code executed by a computer when powered on.

• BIOS performs a Power-On Self Test (POST) to check hardware components.

• BIOS then locates and loads the operating system from the boot device (e.g. hard drive, SSD, USB).

• The operating system is loaded into memor...read more
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Q4. Project related questions.
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All about aptitude questions and test has multiple rounds

Asked about basic code like palindrome, string reverse