CAN Protocol Question & Answers July 15, 2022 By WatElectronics This article lists 75 CAN Protocol MCQs for engineering students. All the CAN Protocol Questions & Answers given below include a hint and a link wherever possible to the relevant topic. This is helpful for users preparing for their exams, interviews, or professionals who would like to brush up on the fundamentals of CAN Protocol. CAN Stands for Control Area Network. It's a two-wired communication protocol. CAN layered architecture consist of two layers Data link layer and the physical layer? The data link layer is divided into two types: MAC- a Media Access Control and LLC- a Logical link control. CAN Standard ISO 11898 has three parts: ISO 11898-1, ISO 11898-2, and ISO 11898-3. CAN framing consists of SOF-Start of Frame, Identifier, RTR which represents Remote transmission request which is of 1-bit. Control field with user-defined functions: IDE, DLC, Data field. CRC-Cyclic redundancy checksum, ACK Field-Receiver’s acknowledgment, and EOF-end of the frame. CAN Network consists of multiple nodes named Node A, B, and C. Each node consists of three elements as Host, Controller, and Transceiver. In CAN, logic 1 is a recessive state, Logic 0 is the dominant state. CAN bus logic- Wired AND Dominant and Recessive. CAN have 4 types of frames: Data, Remote, Overload, and Error. Two message formats exist for data transmission which are Base frame format and extended frame format. 1). CAN stands for __________? Controller Area Network Controller Air Network Couple Area network None of these Hint 2). ______ protocol allows MC and other devices to communicate with each other? USB USART CAN None of these Hint 3).______ represents the information transmitted on all nodes? Movement Network Broadcast None of these Hint 4). The ___ allows the computer to communicate over the network through USB. Switch Node Mode Type Hint 5). The controller area network is a _______ protocol? Message-Based Voice-Based Numbers Based Code Based Hint 6). As the message carries the identifier, _______ is decided? Parity Stop Bit Priority Constant Hint 7). Data link layer is divided into ____ sub-layers? One Two Three None of these Hint 8). MAC stands for ____? Medium Access Control Media Access control Medium Area control None of these Hint 9). LLC stands for ____? Logical link control Logical line control Line link control Line light control Hint 10). Node-to-node data transfer takes place in the ____ layer? Transport Link Data Link Application Link Physical Hint 11). Data link layer is used to detect and correct errors occurring at the ____ layer? Transport Link Data Link Application Link Physical Hint 12) _____ is responsible for the transmission of raw data? Transport Link Data Link Application Link Physical Layer Hint 13). LLC is responsible for frame acceptance _____? Link Mode Method Filtering Hint 14). Physical layer provides specifications for parameters like ____? Voltage Current Timing None of these Hint 15). ISO-11898 part 1 has the specification of a data link and physical ____ link layers? Transfer Signal Mode None of these Hint 16). ISO-11898 part 2 comes under CAN physical layer for ____ speed CAN? Low Least Complex High Hint 17). ISO-11898 part 3 comes under CAN physical layer for ____ speed CAN? Low Least Complex High Hint 18). High-speed CAN allow data rate up to ___ which is used in vehicles. 1Mbps 2Kbps 20bps None of these Hint 19). Low speed CAN allow data rate up to ___ which is used in vehicles. 1Mbps 2kbps 125kbps None of these Hint 20). SOF stands for ______? Sign off Start of frame Start off None of these Hint CAN Protocol MCQs for Interviews 21). Message identifier sets the priority of the data ____? Frame Bind Visual Transfer Hint 22). RTR Stands for ____? Remote transmission request Remote transfer route Routine transfer request None of these Hint 23). At logic 0, CAN high be applied at ____? 1.5V 2.5V 3.5V 4V Hint 24). At logic 0, CAN low should be applied at _____? 1.5V 2.5V 3.5V 4V Hint 25).At logic 1, CAN low should be applied at _____? 1.5V 2.5V 3.5V 4V Hint 26). For the standard frame, the message identifier is ____ bit? 10 11 12 13 Hint 27). For extended frames, the message identifier is ____ bit? 27 28 29 30 Hint 28). How many nodes exist in the CAN protocol? 2 3 4 1 Hint 29). How many frames exist in the CAN bus? 2 3 4 5 Hint 30)._____ field is used to detect errors? Data Frame Crc Remote None of these Hint Read more about Hamming Code 31). ______ specifies how many bytes the data field contains? DLC CRC RTR ACK Hint 32). Differentiation of a small frame from a data frame is done by this bit of ____? DLC CRC RTR ACK Hint 33). ____bit indicates the beginning of a message with a dominant (logic 0) bit? SoF EoF ACK CRC Hint 34). Use of wiring due to its distributed control in CAN is ___? High Low Complex Simple Hint 35). Requires high ____ for software development and maintenance? Cost Range Temperature Visual Hint 36). a Limited number of nodes used are up to ____ nodes? 16 32 64 8 Hint 37). CAN has a high ____ data rate? Velocity Speed Distance Mode Hint 38). Supports auto _____ for attribution lost messages/ Generation Retransmission Linking None of these Hint 39). There exists a possibility of signal ____ issues. Damage Loss Integrity None of these Hint 40). _____ converts data from the CAN controller to CAN bus levels. Transmitter Receiver Transceiver None of these Hint CAN Protocol MCQs for Exams 41). CAN protocol uses two layers of ____ systems interconnection model? Open Close Swing Move Hint 42). CAN protocol is designed for robust and _____ performance in harsh environments? Stable Constant Flexible Good Hint 43). A message is ____ if the EOF field is recessive? Invalid Valid False Error Hint 44). _____ is transmitted when the error is detected? Display Frame Error Frame Data Frame Remote Frame Hint 45). Overload frame is transmitted when the nodes become too __? Easy Low High Busy Hint 46). Traffic congestion is ____ as messages are transmitted based on priority. Entered Eliminated Inserted None of these Hint 47). Differential signalling _____ the noise coupling? Increases Increments Raise Reduces Hint 48). ____ contains the time required by the controller to move a received frame to its position? IFS CRC RRT DLC Hint 49). ___ bit substitutes the RTR bit as a placeholder? SRR IDE DLC RTR Hint 50). Logic LOW in CAN network is termed as ______? Dominant Recessive 0 1 Hint CAN Protocol MCQs for Quiz 51). HIGH logic in CAN is termed as _____? Dominant Recessive 0 1 Hint 52). CAN follow a ______ communication? Synchronous Asynchronous Duplex Full-duplex Hint 53). CAN protocol is developed by ____? Philips Bosch AT & T Reliance Hint Read more about UART 54). CAN follow a ____ topology? Bus Star Line Square Hint 55). Arduino has no ____ CAN protocol/port? Inbuilt Outside Range Switched Hint Read more about Arduino 56). The output of the receive buffer is passed to _____ as input? Host Controller Interface User interface Bus interface None of these Hint 57). PMA performs an ____ synchronization? Dual Tri Octet Hepta Hint 58). Data transmitted in the form of packets is called ____? Work Frames Moves Recover Hint 59)._____ performs encoding and decoding of information? Physical subset layer Physical Coding sublayer Physical Link sublayer None of these Hint 60). CAN protocol employs the approach of ____ with message priority? FDMA TDMA WDMA CDMA Hint 61). Physical layer outlines the properties for the parameters like ____ rate levels? Voltage Current Information Signal Hint 62). Two-wire pairs have a characteristic impedance of ____ ohms? 100 80 120 200 Hint 63). ISO 11898-3 also called _____ CAN? High-speed Low Fault-Tolerant None of these Hint 64). Dividing each bit into several time slices called _____? Quanta Light Movement Group Hint 65). The number of quanta the bit is divided into can vary by _____? Movement Group Quanta Controller Hint 66). ______ is a frame to inject a delay between data or a remote frame? Overload Error Delay Data Hint 67). ______ is a frame containing node data for transmission? Overload Error Delay Data Hint 68). _______ is a frame requesting the transmission of a specific identifier? Overload Error Remote Data Hint 69). Expand TEC full form ______? Transmit error counter Transmit error cite Transmit Enlight Code None of these Hint 70). Expand REC full form ______? Receive error counter Receive error cite Receive enlight code None of these Hint 71). When TEC or REC is greater than 127 and less than 255, a ___ Error frame will be transmitted on the bus? Passive Active Hybrid Remote Hint 72). When TEC and REC are less than 128, an ____ Error frame will be transmitted on the bus? Passive Active Hybrid Remote Hint 73). When TEC is greater than 255, then the node enters into Bus ___ state, where no frames will be transmitted. High Low On Off Hint 74). The CAN bus is also used as a _____ in general automation environments? Field Bus Alternative Bus Direct None of these Hint 75). The speed of transition depends primarily on the length of the CAN network and the ____of the wire used. Inductance Capacitance Resistance None of these Hint Please fill in the comment box below. Time is Up! Time's up
