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I2C Protocol Question & Answers

May 9, 2022 By WatElectronics

This article lists 75 I2C Protocol MCQs for Engineering Students. All the I2C Protocol Questions & Answers given below includes solution and link wherever possible to the relevant topic. This is helpful for users who are preparing for their exams, interviews, or professionals who would like to brush up on the fundamentals of the I2C protocol.

Inter-integrated circuit communication protocol which is the I2C protocol was invented by Philips. It's a serial communication protocol but it is based on a Synchronous mode of communication which means it requires a clock signal to synchronize the data between the source and destination.

The inter-integrated circuit communication protocol requires two wires to establish communications, in which one is a data line that is used to receive and transmit the data among multiple nodes in the network and another one is a clock line that is used to synchronize the data. 

In inter-integrated circuit communication protocol, only one data line is available to transmit and receive the data. It operates in half-duplex mode and in an I2C protocol multiple slaves and multiple masters can be present.

The first version of I2C was created as a simple internal bus system and used in various Philips in-house applications which can achieve a maximum transmission speed of 100kHz. The I2C version 4 is the ultra-fast mode which can achieve a maximum transmission speed of 5MHz.

The I2C uses only two bidirectional open collector or open drain lines. In I2C protocol serial data lines and serial clock lines both are built up to supply voltage with the help of resistors. This type of protocol is widely used for intra-board short-distance communications. 

1). Which one of the following protocols doesn't have a multi-master serial protocol?
HintThe serial peripheral interface protocol is not a multi-master serial protocol but it can be a multi slave protocol 
2). Which one of the following is a full-duplex communication protocol?
HintThe inter-integrated circuit is not a full-duplex communication protocol, it's a half-duplex communication protocol 
3). Which one of the following protocols is developed by NXP?
HintThe I2C protocol developed by NXP and SPI protocol developed by Motorola
4). Which one of the following protocols is better for long-distance?
HintThe serial peripheral interface communication protocol is better for shorter distance
5). Which one of the following protocols doesn't require the additional signal to support multiple devices on the same bus?
HintThe serial peripheral interface communication protocol requires an additional signal to support multiple devices on the same bus
6). Which one of the following protocols doesn't have start and stop bits?
HintThe inter-integrated circuit communication protocol has a start and stops bits
7). In which one of the following protocols the pull-up resistor is not required?
HintThe inter-integrated circuit communication protocol the pull-up resistor is required
8). Which one of the following communication protocols has the clock stretching feature?
HintThe serial peripheral interface communication protocol doesn't have the clock stretching feature
9). The data rate of inter integrated circuit communication protocol is around _________________ Mbps?
HintThe data rate of inter-integrated circuit communication protocol is not more than one Mbps
10). The distance of inter-integrated circuit communication protocol is around __________?
HintThe distance of inter-integrated circuit communication protocol is not more than one 
11). Which one of the following protocols is more efficient in built-in multi-slave and multi-master applications?
HintThe serial peripheral interface communication protocol is more efficient in point to point applications 
12). Which one of the following features of the inter-integrated circuit is related to the SDA line?
HintThe clock stretching is one of the features of the inter-integrated circuit which is related to the SCL line
13). Which one of the following features is processed to get bus access?
HintThe clock stretching is one of the features of the inter-integrated circuit which is related to the SCL line which process slows down the communication 
14). Which one of the following communication protocols is a type of synchronous protocol?
HintThe UART is a type of asynchronous protocol 
15). The maximum bit rate of inter integrated circuit communication protocol is ________________ M bit/sec?
HintThe maximum bit rate of inter-integrated circuit communication protocol is not more than 1 M bit/sec
16). The maximum working frequency of inter integrated circuit communication protocol is ____________ MHz?
HintThe maximum working frequency of inter-integrated circuit communication protocol is not more than 5MHz
17). Which one of the following protocols needs a clock?
HintThe clock is not needed in the universal asynchronous receiver and transmitter protocol 
18). The receiver and transmitter are the two data lines in ________________ protocol?
HintThe SDA & SCL are I2C data lines, SLCK, MODI, MISO, and SS are the four data lines of SPI protocol
19). The SLCK, MODI, MISO, SS are the four data lines in ________________ protocol?
HintThe transmitter & receiver are UART data lines, SDA and SCL are the two data lines of the I2C protocol 
20). Which one of the following protocols needs a chip select line?
HintThe I2C and UART protocols don't need a chip select line

I2C Protocol MCQs for Exams

21). Which one of the following protocols is a single master single slave communication protocol?
HintThe universal asynchronous transmitter and receiver protocol is a single master single slave communication protocol
22). In which one of the following combinations of both SDA and SCL signals are high in the I2C protocol?
Hintn start combination both SDA and SCL signals are high in the I2C protocol
23). In which one of the following modes the speed of the I2C protocol is 100kbps?
HintIn fast mode and fast plus mode the speed of the I2C protocol is more than 100kbps
24). The serial data line in an I2C protocol is low when serial clock pulses is logical _________________?
HintThe serial data line in an I2C protocol is high when serial clock pulses is the logical one
25). The maximum bit rate of an inter integrated circuit communication protocol is ______________ kbps?
HintThe maximum bit rate of an inter-integrated circuit communication protocol is 5000 kbps
26). The maximum length of an inter integrated circuit communication protocol is ______________?
HintThe maximum length of an inter-integrated circuit communication protocol is undefined
27). Which one of the following protocols doesn't have an acknowledgment mechanism to confirm receipt of data?
HintThe SPI protocol has an acknowledgment mechanism to confirm receipt of data 
28). Which one of the following is the node in an inter-integrated circuit communication protocol that receives the clock?
HintThe master node in an inter-integrated circuit communication protocol generates the clock
29). Which one of the following nodes sends the data to a slave?
HintThe master receive node receives the data from a slave
30). Which one of the following is a half-duplex communication protocol?
HintThe serial interface peripheral is a full-duplex communication protocol

I2C Protocol MCQs for Interviews

31). Which one of the following protocols is developed by Motorola?
HintThe I2C protocol developed by NXP and SPI protocol developed by Motorola
32). Which one of the following protocols is better for shorter distances?
HintThe inter-integrated circuit communication protocol is better for longer distance
33). Which one of the following protocols requires the additional signal to support multiple devices on the same bus?
HintThe inter-integrated circuit communication protocol doesn't require an additional signal to support multiple devices on the same bus
34). Which one of the following protocols has a start and stop bits?
HintThe serial peripheral interface communication protocol doesn't have a start and stops bits
35). In which one of the following protocols the pull-up resistor is required?
HintThe serial peripheral interface communication protocol the pull-up resistor is not required
36). Which one of the following communication protocols doesn't have the clock stretching feature?
HintThe inter-integrated circuit communication protocol has the clock stretching feature
37). Which one of the following protocols is more efficient in built-in point-to-point applications?
HintThe inter-integrated circuit communication protocol is more efficient in built-in multi slave and multi-master applications
38). Which one of the following features of the inter-integrated circuit is related to the SCL line?
HintThe arbitration is one of the features of inter-integrated circuits which is related to the SDA line 
39). Which one of the following features is the process to slow down the communication?
HintThe arbitration is one of the features of the inter-integrated circuit is related to the SDA line which is used to process to get the bus access
40). Which one of the following communication protocols is a type of asynchronous protocol?
HintThe inter-integrated circuit and serial peripheral interface protocols are synchronous protocols
41). The maximum bit rate of serial peripheral interface communication protocol is ________________ M bit/sec?
HintThe maximum bit rate of serial peripheral interface communication protocol is not more than 10M bit/sec
42). The maximum bit rate of UART is ________________ M bit/sec?
HintThe maximum bit rate of UART is in kilobits per sec

Read more about UART

43). The maximum working frequency of MIPII3C protocol is ___________________ MHz?
HintThe maximum working frequency of the MIPII3C protocol is 12.5 MHz
44). Which one of the following protocols doesn't need a clock?
HintThe clock is needed in both I2C and SPI communication protocols 
45). The SDA and SCL are the two data lines in ________________ protocol?
HintThe transmitter & receiver are UART data lines, SLCK, MODI, MISO, and SS are the four data lines of SPI protocol 
46). Which one of the following protocols doesn't need a chip select line?
HintThe SPI protocol needs a chip select line 
47). In which one of the following combinations both SDA and SCL signals are low in I2C protocol?
HintIn stop combination both SDA and SCL signals are low in the I2C protocol
48). In which one of the following modes the speed of the I2C protocol is 400kbps?
HintIn standard mode, the speed of the I2C protocol is less than 200kbps
49). Which one of the following protocol have an acknowledgment mechanism to confirm receipt of data?
HintThe I2C protocol doesn't have an acknowledgment mechanism to confirm receipt of data
50). Which one of the following protocols is developed by Robert bosch?
HintThe SPI developed by Motorola and the I2C developed by Philips 

I2C Protocol MCQs for Quiz

51). Which one of the following nodes sends the data to a master?
HintThe slave receive node receives the data from a master
52). The message in an inter integrated circuit communication protocol is broken up into _______________ frames?
HintThe address and data frames are two types of frames in an I2C protocol
53). The master device in an I2C protocol uses ______________ bit address to specify the slave device?
HintThe master device in an I2C protocol uses either a 10 or 7-bit address to specify the slave device
54). How many masters are allowed in an inter-integrated circuit communication protocol to share the same peripheral devices?
HintThe multiple masters are allowed in an inter-integrated circuit communication protocol to share the same peripheral devices
55). The 10 bit addressing in an I2C uses ______________ bytes to carry the information of an address?
Hinthe 10 bit addressing in an I2C uses two bytes to carry the information of an address
56). What is the standard form of IBCR?
HintThe IBCR is one type of inter-integrated circuit control register 
57). Which one of the following is a node in an inter-integrated circuit communication protocol that generates the clock?
HintThe slave node in an inter-integrated circuit communication protocol receives the clock
58). What is the standard form of IBSR?
HintThe IBSR is one type of inter-integrated circuit status register 
59). Which one of the following nodes receives the data from a master?
HintThe slave transmit node sends the data to a master
60). In which one of the following combinations of SDA can either be high or low in I2C protocol?
HintIn bit transfer combination the SDA can either be high or low in the I2C protocol
61). In which one of the following modes the speed of the I2C protocol is 5Mbps?
HintIn standard mode and high-speed mode the speed of the I2C protocol is less than 5Mbps
62). Which one of the following modes in an I2C communication protocol requires controller code for high-speed transfer?
HintThe fast plus, fast, and standard modes doesn't require controller code for high-speed transfer
63). The inter integrated circuit communication protocol allows for ________________?
HintThe inter-integrated circuit communication protocol allows for multiple controllers and multiple targets
64). In inter integrated circuit communication protocol the pull up resistor requires on ________________ line?
HintThe SDA and SCL both are data lines in inter-integrated circuit communication protocol 
65). The serial data line in an I2C protocol is high when serial clock pulses is logical _________________?
HintThe serial data line in an I2C protocol is low when serial clock pulses are logical zero
66). Which one of the following protocols is developed by Philips?
HintThe SPI was developed by Motorola and the CAN was developed by Robert botch
67). Which one of the following protocols is a single master protocol?
HintThe CAN and I2C protocols are multi-master protocols
68). In which year does an inter-integrated circuit communication protocol invent?
HintIn 1982 an inter-integrated circuit communication protocol was invented
69). How many nodes are there in the architecture of an I2C protocol?
HintThe master and slave are two nodes in an inter-integrated circuit communication protocol
70). In which one of the following modes the speed of the I2C protocol is 1Mbps?
HintIn standard mode, the speed of the I2C protocol is in kbps
71). How many devices can be connected with an inter-integrated circuit communication protocol?
HintThe devices which can be connected with an inter integrated circuit communication protocol is not more than 127
72). How many bits are needed to address 127 devices in an inter-integrated circuit communication protocol?
HintThe bits which are needed to address 127 devices in an inter-integrated circuit communication protocol is not greater than seven
73). What is the standard form of IBFDR?
HintThe IBFDR is one type of inter-integrated circuit frequency divider register
74). Which one of the following nodes receives the data from a slave?
HintThe Master transmit node sends the data to a slave
75). In which one of the following modes the speed of the I2C protocol is 3.4Mbps?
HintIn standard mode, the speed of the I2C protocol is in kbps

Read more about I2C Protocol 

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