L&T Technology Services Embedded Firmware Engineer Interview Questions and Answers

Q1. What is que in sv ?
Ans. 
Que in SystemVerilog (SV) is a built-in data type used for creating queues.
• Queues are dynamic arrays that can grow or shrink in size during simulation.

• Queues can store elements of any data type.

• Elements can be added to the end of the queue using the built-in methods like push_back().

• Elements can be removed from the front of the queue using the built-in methods like pop_front().
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Q2. What is mailbox
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A mailbox is a data structure used for communication between different processes or threads in a computer system.
• Mailboxes are typically used in multi-threaded or multi-processor systems to pass messages between different entities.

• They provide a way for processes to communicate without directly accessing each other's memory.

• Mailboxes can be implemented using queues, shared memory, or other mechanisms depending on the s
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Q3. What is delay inter and intera
Ans. 
Delay inter and intra refer to delays within and between different components or systems.
• Delay inter refers to delays between different components or systems.

• Delay intra refers to delays within the same component or system.

• Example: Delay inter can occur when data is transferred between a CPU and memory.

• Example: Delay intra can occur within a CPU due to processing time.
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Q4. What is constraint
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Constraints in verification engineering are conditions or limitations imposed on the design or testbench to ensure certain properties are met.
• Constraints are used to restrict the possible values of variables or signals in a design or testbench.

• They help in verifying specific behaviors or scenarios within the design.

• Examples include setting timing constraints for signal propagation or limiting the range of input values
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Q5. What is oops related
Ans. 
Object-oriented programming concepts such as classes, objects, inheritance, encapsulation, and polymorphism.
• Classes: Blueprint for creating objects with attributes and methods.

• Objects: Instances of classes that contain data and behavior.

• Inheritance: Ability for a class to inherit properties and behavior from another class.

• Encapsulation: Bundling data and methods that operate on the data into a single unit.

• Polymorphism:...read more
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Given some questions and we can prefer the language

Q1. Have you worked on linux
Ans. 
Yes, I have worked on Linux for embedded software development.
• I have experience developing embedded software using Linux as the operating system.

• I have worked on customizing Linux kernels for specific embedded systems.

• I have used Linux tools and libraries for developing embedded applications.

• I have debugged and optimized software performance on Linux-based embedded systems.
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Q2. What is micro controller?
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A microcontroller is a small computer on a single integrated circuit that contains a processor core, memory, and programmable input/output peripherals.
• Microcontrollers are used in embedded systems for controlling various devices and processes.

• They are commonly found in everyday devices such as microwave ovens, washing machines, and remote controls.

• Microcontrollers are programmed using specialized software tools and lan...read more
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Q1. Self introduction
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Q2. Are you ready to relocate
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Q1. What are storage class
Ans. 
Storage classes in C specify the scope and lifetime of variables.
• Storage classes include 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 retain their value between function calls.

• Extern variables are declared in one file and can be used in another file.
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Q2. Explain structure program
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A structure program is a program that uses structures to group related data together.
• Structures in C programming allow you to group related data together under one name.

• You can define a structure using the 'struct' keyword.

• Structures can contain different data types, including int, float, char, and even other structures.

• You can access the members of a structure using the dot operator.

• Example: struct employee { int id; ...read more
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Q1. They generally asked about basic C question in pointers,function pointers,callback function
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Q2. Write a program on finding little or big endian,no of bits set in bit magic,
Ans. 
Program to find endianness and number of bits set in bit magic.
• Use bitwise operators to check endianness

• Count number of set bits using bitwise AND and right shift

• Use pre-defined functions for endianness in some programming languages

• Endianness can affect network communication and file formats
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Q3. Basic of rtos diff btw rtos and gpos core optimisation techniques used debug technique when fault occurs
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Q4. Basic IPC concepts used in operating system
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IPC stands for Inter-Process Communication and is used for communication between processes in an operating system.
• Shared memory

• Message passing

• Pipes

• Sockets

• Remote Procedure Calls (RPC)

• Semaphores

• Mutexes
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Q1. Mainly focused on basics of c language Stack program
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Q2. Compilation stages , function
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Coding Questions on REGEX, Dictionaries, Strings, Unit test coding.

Q1. The test had three sections: 10 - Aptitude questions 15 - C programming Mcq 3 - C programming coding questions
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Q1. Introduction. Difference between Embedded Systems and Embedded software. Difference between linux and windows. Why use microcontroller instead of microprocessor. C programming: structure and union, poi...read more
Ans. 
Interview questions for Embedded Software Engineer
• Embedded systems are hardware and software combined to perform a specific task

• Embedded software is the software component of an embedded system

• Linux is open-source, customizable, and widely used in embedded systems

• Windows is proprietary, less customizable, and not commonly used in embedded systems

• Microcontrollers have built-in memory and peripherals, making them more su...read more
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Embedded c 15 question and c language programming

Q1. Basically focaus on c laguage
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