QDnet Technologies Embedded Developer Interview Questions and Answers

Q1. Microprocessor vs microcontrollers
Ans. 
Microprocessors are general-purpose processors while microcontrollers are specialized processors for specific tasks.
• Microprocessors are used in computers and smartphones, while microcontrollers are used in embedded systems like washing machines and traffic lights.

• Microprocessors have separate memory and I/O devices, while microcontrollers have integrated memory, I/O ports, and peripherals.

• Microprocessors require extern...read more
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Q2. Bit swapping and bit clear ,toggle,set
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Q1. Project related questions
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Q1. Basic hr question, salary,negative and postive of a person
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+ C and C++concepts.
+ RTOS
+ Multi threading

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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Very easy, basic questions

Written test
C programming

Q1. Volatile keyword
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Q2. Project specific
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Q1. Salary expectations
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Q2. Reason for job change
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Q1. Why are you interested in the field of embedded software development?
Ans. 
I am fascinated by the challenge of working with low-level hardware and creating efficient, real-time systems.
• Enjoy the challenge of working with low-level hardware

• Excited about creating efficient, real-time systems

• Passionate about developing innovative solutions for embedded systems
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Q2. What is CAN protocol?
Ans. 
CAN protocol stands for Controller Area Network protocol, used for communication between microcontrollers and devices in automotive and industrial applications.
• CAN protocol is a robust and reliable communication protocol used in automotive and industrial applications.

• It allows multiple microcontrollers to communicate with each other without a host computer.

• CAN protocol uses a differential signaling scheme to reduce ele...read more
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Q1. What is binary coded decimal?
Ans. 
Binary Coded Decimal (BCD) is a way of representing decimal numbers using a binary code.
• BCD uses four bits to represent each decimal digit.

• Each decimal digit is represented by its binary equivalent.

• For example, the decimal number 25 is represented in BCD as 0010 0101.
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Q2. How keyboard mapping works in a microcontroller?
Ans. 
Keyboard mapping in a microcontroller involves assigning specific key codes to each key on the keyboard.
• Keyboard mapping is typically done using a lookup table that maps physical key presses to corresponding key codes.

• The microcontroller reads the key code when a key is pressed and sends it to the computer for processing.

• Keyboards may use different mapping standards such as ASCII or HID.

• Custom keyboard mappings can als...read more
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Q3. What is the principle of analog to digital converter?
Ans. 
An analog to digital converter converts continuous analog signals into discrete digital values.
• Converts continuous analog signals into digital values

• Utilizes sampling and quantization techniques

• Common types include successive approximation ADC and delta-sigma ADC
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Q1. What is embedded c
Ans. 
Embedded C is a programming language used for developing software for embedded systems.
• Embedded C is a subset of the C programming language.

• It is optimized for resource-constrained systems with limited memory and processing power.

• It allows direct access to hardware and provides low-level control.

• Embedded C is used in various industries like automotive, aerospace, consumer electronics, etc.

• Example: Writing code to contr...read more
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Q2. Refer embedded c
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Embedded c 15 question and c language programming

Q1. Basically focaus on c laguage
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