Can protocol interview questions and answers in detail

This article lists 75 CAN Protocol MCQs for engineering students. Where possible, each of the CAN Protocol questions and answers below includes a hint and a link to the pertinent page. This is beneficial for users brushing up on the CAN Protocol fundamentals before exams, interviews, or other important events.

CAN Stands for Control Area Network. Its a two-wired communication protocol. The data link layer is divided into two types: MAC- a Media Access Control and LLC- a Logical link control. A layered architecture can have two layers: the data link layer and the physical layer.

The three components of CAN Standard ISO 11898 are ISO 11898-1, ISO 11898-2, and ISO 11898-3. CAN framing is made up of the 1-bit Remote Transmission Request (RTR), the SOF (Start of Frame), and the Identifier. Control field with user-defined functions: IDE, DLC, Data field.

End of frame, Receiver’s Acknowledgement Field, and CRC-Cyclic Redundancy Checksum Numerous nodes with the names Node A, B, and C make up the CAN Network. There are three components that make up each node: a host, a controller, and a transceiver.

In CAN, logic 0 is the dominant state while logic 1 is a recessive state. CAN bus logic- Wired AND Dominant and Recessive. There are four different frame types in CAN: data, remote, overload, and error. Base frame format and extended frame format are the two message formats used for data transmission. 1). Controller Area Network Controller Air Network Couple Area network None of these are what CAN stands for (Hint 2). None of these: USB USART CAN None of these allow MC and other devices to communicate with each other Hint 3). Movement Network Broadcast None of these Hint 4) Movement Network Broadcast represents the information transmitted on all nodes. The ___ enables USB network communication on the computer. Switch Node Mode Type Hint 5). A message-based, voice-based, number-based, code-based, controller area network protocol is what? Hint 6) The decision is made because the message contains the identifier: Parity Stop Bit Priority Constant Hint 7) Which sub-layers of the data link layer are there? One Two Three None of these Hint 8) Medium Access Control, also known as Media Access Control, Medium Area Control, or None of the Above Hint 9) Logical link control, logical line control, line link control, and line light control are the acronyms for, respectively. Transport Link Data Link Application Link Physical Hint 11) The layer in which node-to-node data transfer occurs is called the ____ layer. Transport Link Data Link Application Link Physical Hint 12) _____ is in charge of transmitting raw data? Transport Link Data Link Application Link Physical Layer Hint 13) Data link layer is used to detect and correct errors occurring at the ____ layer? Frame acceptance is the responsibility of the LLC. Link Mode Method Filtering Hint 14) Physical layer specifies variables such as Voltage Current Timing None of these Hint 15) Transfer Signal Mode None of these Hint 16) The specification of a data link and physical link layers are found in ISO-11898 Part 1. Low Least Complex High Hint 17) ISO-11898 part 2 falls under the CAN physical layer for ____ speed CAN. Low Least Complex High Hint 18) ISO-11898 part 3 falls under the CAN physical layer for ____ speed CAN. High-speed CAN, used in automobiles, allows data rates of up to 1Mbps 2Kbps 20bps None of these Hint 19). Low speed CAN, used in automobiles, allows data rates of up to 1Mbps 2kbps 125kbps None of these Hint 20). What does SOF (sign off, start of frame, start off) stand for?

CAN Protocol | Top 50 Question & Answers in CAN Protocol | Embedded World

Microcontrollers and other devices can communicate with each other in applications without the use of a host computer thanks to the robust vehicle bus standard known as the Controller Area Network (CAN bus). It is a message-based protocol that was initially created to conserve copper by multiplexing electrical wiring inside of automobiles, but it can also be applied in a variety of other situations.

CAN use a Non-Return-to-Zero protocol, NRZ-5, with bit stuffing. The purpose of bit stuffing is to guarantee the edge of the signal so that the receiver and transmitter can resynchronize before minute clock differences between the two nodes can result in a problem. When using NRZ-5, the transmitter can only send up to five bits of the same value in a row. A stuff bit with the opposing state is inserted by the transmitter after five bits with the same value (zero or one).

There are some CAN message components with a fixed format, i e. the standard defines exactly what levels must occur and when. (These components include the CRC Delimiter, ACK Delimiter, End of Frame, and Intermission, but there are additional, unique error checking rules for those. A Form Error is displayed if a CAN controller detects an invalid value in one of these fixed fields.

It happens because the node with the lower identifier will keep transmitting while driving the bus to the dominant state (logical 0), while the other node, which wants to keep it in the default state (recessive state, logical 1), will read back the dominant state on the bus and stop transmitting. This occurs when there are different bits. As a result, the data is preserved by this mechanism because simultaneous transmissions do not corrupt the frame with lower priority.

Instead of using addresses, the CAN protocol uses messages. This indicates that addresses are not used to transmit messages from one node to another node. The priority and the details of the data being transmitted are included in the CAN message itself. Every message sent over the bus is received by every node in the system, and each node will respond positively if the message was successfully received. Whether a message should be immediately discarded or saved to be processed is up to each node in the system. Depending on how the network and system are set up, a single message may be intended for a number of nodes or just one. For instance, a safety system router node can only be connected via CAN to an automobile airbag sensor. This router node receives data from other safety system nodes and routes it to every other node on the network for safety systems. The other nodes on the safety system network can then simultaneously receive the most recent airbag sensor data from the router, confirm that the message was successfully received, and choose whether to use or discard the data.

Based on the CAN (Controller Area Network) protocol, CANopen is a high-level communication protocol and a device profile specification. For embedded networking applications like in-vehicle networks, this protocol was created. Also covered are a network programming framework, application profiles, device descriptions, and interface definitions. A protocol called CANopen offers standardized communication between products and software from various manufacturers.

Why is job preparation simpler with our interview questions site? Because wisdomjobs gives you all the information plus all the jobs in one place, job preparation for a Controller Area Network (CAN bus) job is now simpler and easier with our interview questions. To be more specific, a Controller Area Network (CAN bus) is a robust vehicle bus standard created to enable communication between microcontrollers and devices in applications without a host computer. There are numerous top companies that will offer you positions such as Network Controller/Operator Lead, Technical Consultant, Wireless & Mobility, Network Administrator, among others, if you are proficient in all controller area network concepts.

Can Protocol Interview Questions list for experienced

  • What is CAN?
  • CAN frame works?
  • Why CAN is having 120 ohms at each end?
  • Why CAN is message oriented protocol?
  • How CAN will follow the Arbitration?
  • If master sends 764 and Slave sends 744 which will get the arbitration?
  • Standard CAN and Extended CAN difference?
  • What is bit stuffing?
  • What is the use of bit stuffing?
  • What are the functions of CAN transceiver?
  • Functionality of Data link layer in CAN?
  • What is meant by Hard synchronization and soft synchronization?
  • This page contains Can Protocol interview questions and answers with examples for both freshmen and experienced candidates. Send a message to info@pcds to apply for the Can Protocol tutorials and training course, and fill out the form below to receive all of the interview questions on Can Protocol. co. in in detail about your self.


    What is the basic principle of CAN protocol?

    A carrier-sense, multiple-access protocol with collision detection and message priority arbitration is the CAN communication protocol (CSMA/CD+AMP). According to CSMA, each node on a bus must wait a specific amount of time after being idle before attempting to send a message.

    CAN protocol important interview questions?

    Practice CAN Protocol Interview Questions & Answers
    • 1) What is CAN Protocol? …
    • 2) Enlist major features of CAN Protocol? …
    • 3) List some applications of CAN Bus? …
    • 4) What are CAN Messages? …
    • 5) Explain high Speed CAN and Low Speed CAN? …
    • 6) What is standard CAN and Extended CAN? …
    • 7) What Is Can Arbitration? …
    • 8) What is SAE J1939?

    Why 0 is dominant in CAN protocol?

    Dominant applies to 0 because if two arbitration IDs are transmitted concurrently with their first four bits identical and their fifth bit is either 0 or 1, the ID with the 0 will be transmitted.

    What are the features of CAN protocol?

    The 5 Advantages of CAN Protocol
    • Low Cost. When the CAN protocol was initially developed, its main objective was to speed up communication between electronic components and modules in cars while minimizing the amount of wiring (and copper) required.
    • Built-in Error Detection. …
    • Robustness. …
    • Speed. …
    • Flexibility.

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