Watchdog Timer Question & Answers August 20, 2022 By WatElectronics This article lists 50 Watchdog Timer MCQs for engineering students. All the Watchdog Timer Questions & Answers given below include a hint and a 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 Watchdog Timer. A microcontroller consists of a processor to control Electronic devices. These are integrated along with other devices and have pre-loaded software that commands and controls the device. Hence, it is necessary to safeguard and normalize MCU operations. For some reason programs in MCU may lose their control or may stop running. This leads to the erratic behavior of electronic devices and in the worst situations may cause an accident or the device gets destructed. To prevent such proactive accidents MCU must be operated by a Watchdog timer. Software or an electronic timer utilized to identify and retrieve the computer from malfunctions is referred to as a Watchdog timer. At a set duration of time Watchdog timer connects with MCU. In response, if MCU fails to generate any outcome or generates multiple signals that differ from the pattern i.e., predetermined. This makes the timer understand that MCU is malfunctioned and sends a Reset signal. 1). Restarting a Watchdog timer is known as ________? Pushing Pulling Kicking Picking None Hint 2). CLRWDT is _______? Clear Watchdog Timer Clean Watchdog Timer Close Watchdog Timer Communicate Watchdog Timer None Hint 3). How the watchdog is kicked in Linux OS? By a User Space Program By CLRWDT By Writing to Control Port By Writing to Register None Hint 4). Device driver can _________ Watchdog? Pull Push Restart Pick None Hint 5). Watchdog monitors ______ programs? Microprocessor Microcontroller Hardware Software None Hint 6). How kicking is performed in Watchdog timers? Writing to Control Port Set a Particular Bit in Register Using Machine Language Instruction All Mentioned Above None Hint 7). _______ configures the Time-out period in Watchdog Timer? Operating System Device Driver a & b Machine Language None Hint 8). Time intervals in watchdog are ______? Fixed Programmable a & b Dynamic None Hint 9). What are the various modes in Watchdog timers? Time-out Mode Window Mode Question Answer Mode All Mentioned Above None Hint Read More about Digital Timers 10). In what mode, signal is not received from MCU for a set duration? Time-out Mode Window Mode a & b Question Answer Mode None Hint 11). The fault detection due to multiple received signals from MCU enabled in ______? Time-out Mode Window Mode a & b Question Answer Mode None Hint 12). In what mode, the fault is detected based on Predetermined data? Time-out Mode Window Mode a & b Question Answer Mode None Hint 13). Higher the safety degree requires _________? Time-out Mode Window Mode a & b Question Answer Mode None Hint 14). Question & Answer mode in Watchdog timer relies on ______? Link Communication Data Communication Wireless Communication Wired Communication None Hint 15). Which mode has the complexity to operate in Watchdog Timer? Time-out Mode Window Mode a & b Question Answer Mode None Hint Watchdog Timer MCQs for Interviews 16). What are the various Watchdog timers? Internal Watchdog Timer External Watchdog Timer a & b None None Hint 17). _________ doesn't have a guarantee that fails MCU can monitor and faults get detected? Internal Watchdog Timer External Watchdog Timer a & b None None Hint 18). ________ has an additional layer to enhance safety for Critical systems? Internal Watchdog Timer External Watchdog Timer a & b None None Hint 19). What type of Watchdog timer provides the redundancy required? Internal Watchdog Timer External Watchdog Timer a & b None None Hint 20). Faults occur in MCU can impact WDT in _______? Internal Watchdog Timer External Watchdog Timer a & b None None Hint 21). Window mode Watchdog timers provide _______? Redundancy Monitoring Detection b & c None Hint 22). Which one is the best mode of Watchdog timers? Time-out Mode Window Mode a & b Question Answer Mode None Hint 23). Which of the following timer has unique intervals of time? Internal Watchdog Timer External Watchdog Timer Single Stage Watchdog Timer Multi Stage Watchdog Timer None Hint 24). The First stage in multi-stage watchdog timers gets kicked from ____? Operating System Device Driver a & b Processor None Hint 25). Time interval in Watchdog timer ranges from _______? 10 ms to 1 min 0.5 ms to 10 ms 0.2 micro s to 0.5 ms 0. 2 ms to 0.5 ms None Hint Watchdog Timer MCQs for Students 26). What happens if the Watchdog timer gets expired? Hardware Reset the System Software Reset the System Alert is Sent a & b None Hint 27). When should the Watchdog timer be kicked? Before it Expired After Interrupt Generated After it Expired None None Hint 28). ________ keeps the counter track before the code reaches infinite loop. 28). ________ keeps the counter track before the code reaches infinite loop? Timers Watchdog Timer Oscillators Plug-in Timer None Hint 29). WDTCTL is _______ register? 8 bit 16 bit 32 bit 64 bit None Hint 30). What happens if any incorrect Password is entered in WDTCTL? Pull Push Restart Pick None Hint 31). Which bit is WDTNMI of the watchdog timer Control register? Bit 1 Bit 3 Bit 5 Bit 7 None Hint 32). To initiate action WDTCNTCL is equivalent to ____? 0 1 Low Constant None Hint 33). The clock period is controlled using ______? WDTNMI WDTHOLD WDTISx WDTCLR None Hint 34). How the bit WDTCNTCL is set in WDTDTL? Pushing Pulling Kicking Picking None Hint 35). How the WDTIFG is cleared? Interrupt Occur Interrupt Serviced No Interrupt Interrupt Terminated None Hint 36). What happens if WDTTMSEL is set to 1? Counter Mode Interval Timer Mode Watchdog Mode Interrupt Mode None Hint 37). What happens if WDTTMSEL is set to 0? Counter Mode Interval Timer Mode Watchdog Mode Interrupt Mode None Hint 38). Which bit in WDTCTL stops the Watchdog Timer? WDTNMI WDTHOLD WDTISx WDTCLR None Hint 39). How internal WDTs are configured? Writing to Control Port Set a Particular Bit in Register Using Machine Language Instruction All Mentioned Above None Hint 40). External WDTs require ______ for functioning? Active Components Passive Components Transistors Diodes None Hint Watchdog Timer MCQs for Quiz 41). What are the various internal WDTs? Windowed WDT Non-Windowed WDT a & b Loop WDT None Hint 42). What are the advantages of Internal WDTs? Cost-effective No Additional Components Required Size is Reduced All Mentioned Above None Hint 43). In RTOS time of critical tasks is monitored using ________? Timers Watchdog Timer Oscillators Plug-in Timer None Hint 44). Space probes have _________? Timers Watchdog Timer Oscillators Plug-in Timer None Hint 45). What type of timers are required by Self-reliant systems? Timers Watchdog Timer Oscillators Plug-in Timer None Hint 46). ___________ are widely preferred in Computers to detect faults? Timers Watchdog Timer Oscillators Plug-in Timer None Hint 47). What is the most accurate fault detection mode? Time-out Mode Window Mode a & b Question Answer Mode None Hint 48). What mode in the watchdog timer is suitable for Automotive devices? Time-out Mode Window Mode a & b Question Answer Mode None Hint 49). What happens to the system if the watchdog reaches end of counting? Resets the Processor Alert System Starts the Processor All Mentioned Above None Hint 50). What is the necessity of Watchdog Timers? Alerting a System To Reset Processor To Start Processor a & b None Hint Please fill in the comment box below. Time's up
