Order of the system can be determined from the transfer function of the system. Question 29. the question does not mention that there will be equal number of white and black hats ! Positive feedback is not used generally in the control system because it increases the error signal and drives the system to instability. All rights reserved © 2020 Wisdom IT Services India Pvt. @JustJanek- Your solution is close, but not correct. Industrial Automation and Control Interview Questions . If it doesn't shatter at 75, go to 88, etc. The tallest dwarf counts four 1's (black hats) so to make the parity even he has to say 0 (white hat). On a different page altogether, I went through all of the above answers. Without any kind of assumption, 9 people can be saved with a 50% probability of the 10th (tallest). - 10 My strategy doesn't make any unmentioned assumptions (such as equal number of white and black hats, etc). I will explain it but for ease of explanation I will use binary 1 and 0 for black and white. Every dwarf needs to consider the parity of a number composed of all the following dwarfs and all the dwarfs behind. Transfer Function of a control system is defined as: Question 4. What Is Phase Cross Over Frequency? @Kristen - you have so underthought it! One test. One is a 3.9 student and the other 3.5. Lets make a strategy of saying only one colour before execution eg) black or white. Since they do not know, how many black or white hats there are, the following strategy will save min 5 dwarfs: The first dwarf asked names the color of the hat of the 2. dwarf. There are 2 different strategies, each dependent on whether there are an even or odd number of white and black hats in play. What Are The Basic Properties Of Signal Flow Graph? For your next test, divide the range you need to investigate into 3. Smoke / Sanity test suite. Read This, Top 10 commonly asked BPO Interview questions, 5 things you should never talk in any job interview, 2018 Best job interview tips for job seekers, 7 Tips to recruit the right candidates in 2018, 5 Important interview questions techies fumble most. It is the process of testing life cycle. I don't know, but odds are high that the giant is a sadistic bloke). Same goes for the rest of the dwarfs and so 9 will be saved. One is a Senior in Electrical and one is a Junior in Mechanical. Including plc hmi networks and drives issues? Why? Why do you want to work for us? This way they can save atleast 9 dwarf out 10. I think that Christian's comment on aug 13-2013 was very close but I'm thinking about communication integrity confirmation techniques. ), • By id • By name • By css locators • By xpath • By link Tools: Developer tools, Also by Name TagName LinkText PartialLinkText. Shatters at 50, shatters at 2. If you had closer to 100, a strategy of beginning on the 50th floor and working up or down would work great. Question 30. Answer: PID or Proportional Integral Derivative is widely used in closed-loop control. Question 20. What are Analog Input/output & Digital Input/output? Top 10 facts why you need a cover letter? First lets look at number of back and white hats...To satisfy the condition "black and white" hata there is minimum one black or white hat present. Let's say N7 is black, so N8 will state, "My hat is NOT BLACK". They are always 9 dwarfs that could be saved. If it shatters at 50, though, you'll have to go to the second floor (assuming you can simply place the orb on the ground when on the first floor) and work your way up one at a time--because you've only got one orb left. a.s.o. For example: let's say the orbs break on the 48 floor. Two reasons: First, their preparation involves only One or more comments have been removed. The slope of the log-magnitude curve near the cut-off frequency is called the cut-off rate. I was thinking if I could even come up with that even after years of pondering. 4-20 mA signals to instrument (I/p & electro pneumatic positioner) are analog output from control system.. Volt free (24V) contact (NO/NC) by instruments (all type of switches, ex. A software quality assurance engineer is an end-user advocate, ... Software developers don't consider the questions they are asking automation developers to be difficult. So its minimum (9 black & 1 white) or (1 white & 9 black) hat being distributed randomly amoung dwarfs. The role of Feedback in control system is to take the sampled output back to the input and compare output signal with input signal for error ( deviation from the desired result). Each dwarf can hear the previous answers, but cannot hear when a dwarf is killed. The minimum number of tests is 2. What if the dwarf behind you says "black" and the dwarf in front of you has a white hat???? 279 automation and controls engineer interview questions. So if we'll take an even parity, the number of 1's must be an even number in total. Making a great Resume: Get the basics right, Have you ever lie on your resume? How do you determine which floor the orbs will shatter at, and what is the minimum number of tests you need to execute? Say for example, the tallest dwarf sees 3 Black and 6 whites, it will call out Black(it may or may not die with 50% chances). I could probably answer 3 or 4 out of fluffy's questions and I assume to a poorer quality than the Controls folks. Do you have employment gaps in your resume? When it comes to service tests then automation is more important; When it comes to graphic design manual is more important. PID (Proportional Integral Derivative) is the algorithm widely â¦ Time response of the control system is defined as the output of the closed loop system as a function of time. One of them is using a parity bit to confirm the message was correct. What Is The Basic Rule For Block Diagram Reduction Technique? N7 knows that his color is BLACK, but N6 is white, so he will use a negative statement, "My hat is NOT WHITE" and so on. Sample Paper for Industrial automation and Control. In the automation process, steps involved â¦ I also have 2 sons in college as Engineering Students. This interview (PLC & SCADA Applications Interview) has been extracted from the âInstrumentation & Control Systems Engineering Interview â¦ QA Automation Engineer at Workday was asked... QA Automation Engineer at State Street was asked... QA Automation Engineer at BitTorrent was asked... QA Automation Engineer at Tenable was asked... QA Automation Engineer at Apple was asked... QA Automation Engineer at QuinStreet was asked... QA Automation Engineer at HCL Technologies was asked... Senior Software Engineer salaries ($110k), Quality Assurance Engineer salaries ($72k), Quality Assurance Analyst salaries ($65k), Senior QA Automation Engineer salaries ($107k), Software Quality Assurance Engineer salaries ($71k), Software Engineer In Test salaries ($107k). If both remain intact, then you'll check floors above 66. A node is a point representing a variable or signal. Again,the 3rd one in a row knows about 2 colors before and can see 7 colors in front of him.And when he adds 2 colors he already had heard of -he knows total number of 9 hats as well.So he just has to see which color is less presented and that is the color of his hat. In a System the output and inputs are interrelated in such a manner that the output quantity or variable is controlled by input quantity, then such a system is called Control System. Question 19. The Gain Margin is defined as the reciprocal of the magnitude of open loop transfer function at phase cross over frequency. It it does not, drop from the 94th floor, etc. 272 controls engineer ~1~null~1~ interview questions. If it does not, drop from the 75th floor. With an additional 66 professionally written interview answer examples. Given two strings, merge them -> so that "abc" and "def" becomes "adbecf" for example". If it shatters, work you way up from the first floor. Next, 8th dwarf knows number of odd (black) caps 9th dwarf could see and if it(8th) finds 1 less black cap, it would know it is wearing a black cap.. and so on. The cut-off rate indicates the ability of the system to distinguish between the signal and the noise. If it shatters at 75, you have to go to 51 and work up one at a time, as, again, you only have one orb left. Artificial Intelligence (AI) language is adapted for the field of artificial intelligence and knowledge engineering, symbolic processing and logical reasoning ability combined in computer program. Here is how it can be achieved, The strategy is to call the color of odd number of hat. What Is The Effect Of Positive Feedback On Stability Of The System? So reading the answers provided they all have some assumptions e.g. It was manufactured â¦ But I must admit, all of the above strategies are made by an outsider (ie. automation and controls engineer interview questions shared by candidates. the 3. dwarf again names the color of the hat of the 4th dwarf and has a 50% chance to survive, while the 4th dwarf can name the correct color of his hat. Electrical Engineering is a branch and discipline of electrical concepts and its applications related to electrical systems, electromagnetic and electronic devices. What Is Time Response Of The Control System? 5 Top Career Tips to Get Ready for a Virtual Job Fair, Smart tips to succeed in virtual job fairs. How to Answer: What Are Your Strengths and Weaknesses? This list of rpa interview questions will help you to crack automation â¦ Each dwarf can see all the shortest dwarfs in front of him, but cannot see the dwarfs behind himself. A branch indicates the functional dependence of one signal on another, A node adds the signals of all incoming branches and transmits this sum to all outgoing branches, Signals travel along branches only in a marked direction and is multiplied by the gain of the branch, The algebraic equations must be in the form of cause and effect relationship. Which was the first industrial robot? driver.getWindowHandle() returns the current window handle( in string) driver.getWindowHandles() returns the all opened window handles as (set or list) of Strings. ... Feel free to share your favorite coding question sites âand the crazy interview questions you've fieldedâ in the comments below. The tallest dwarf can see 9 hats in front of him ( 4 white and 5 black hats or the other way around). Each dwarf simply has to state the color of the hat worn by the dwarf directly in front of him. To be precise about Control Systems-Electrical Engineering is an engineering discipline that applies automatic control theory to design systems with desired behaviours in control environments. Pole of a function F(s) is the value at which the function F(s) becomes infinite, where F(s) is a function of the complex variable s. Zero of a function F(s) is a value at which the function F(s) becomes zero, where F(s) is a function of complex variables. Provides insight into past experience. http://www.businessinsider.com/toughest-job-interview-questions-2013-7#a-dwarf-killing-giant-lines-up-10-dwarfs-from-shortest-to-tallest-each-dwarf-can-see-all-the-shortest-dwarfs-in-front-of-him-but-cannot-see-the-dwarfs-behind-himself-the-giant-randomly-puts-a-white-or-black-hat-on-each-dwarf-no-dwarf-can-see-their-own-hat-the-giant-tells-all-the-dwarfs-that-he-will-ask-each-dwarf-starting-with-the-tallest-for-the-color-of-his-hat-if-the-dwarf-answers-incorrectly-the-giant-will-kill-the-dwarf-each-dwarf-can-hear-the-previous-answers-but-cannot-hear-when-a-dwarf-is-killed-the-dwarves-are-given-an-opportunity-to-collude-before-the-hats-are-distributed-what-strategy-should-be-used-to-kill-the-fewest-dwarfs-and-what-is-the-minimum-number-of-dwarfs-that-can-be-saved-with-this-strategy-11. Questions asked in Interviews are mainly based on the Interviewer's mindset and Character. Whereas in the casestudy, the strategy has to be devised by the 10 dwarfs, who face the impact of this strategy. What Is The Use For Cable Entry In Control Room? Love your job. The commonly used test signals are impulse, ramp, step signals and sinusoidal signals. So, for example, if the 66th breaks and the 33rd does not, then you have 33 possible floors. Copyright © 2008–2020, Glassdoor, Inc. "Glassdoor" and logo are registered trademarks of Glassdoor, Inc. Question 17. with N10 being the tallest. Automation and controls engineer Interview Questions, Automation Engineer - Control Systems Jobs, automation and controls engineer Jobs in Fishers, automation and controls engineer Jobs in Centennial, automation and controls engineer Jobs in Mason, automation and controls engineer Jobs in Denver, automation and controls engineer Jobs in Portland, automation and controls engineer Jobs in Chicago, 9 Attention-Grabbing Cover Letter Examples, J.P. 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PID controllers maintain theâ¦ Next :), Your going to definitly get 9 because when the dwarves collude the tallest tells the next tallest his hat color and so on down the line. If they shatter, they will shatter at the bottom floor. Servo Mechanism is widely used in Governor value position control mechanism used in the power plants where speed of the turbine is taken and processed using the transducers and final control element is brought as mechanical movement of the value. Question 15. And so on until the last dwarf...All saved. 9 First of all, let's numerate the dwarfs as N1, N2, N3, etc. Resonant peak is defined as the maximum value of the closed loop transfer function.A large resonant peak corresponds to large overshoot in the transient respose. In other words, when a strategy's success depends on the conformance to that strategy by ALL the participants, the strategy should also benefit ALL the participants if it is to succeed (or in the least, should not harm even ONE participant). This is not an incorrect answer and the Giant, if he were an honourable giant that is :), would have to let the Dwarf live. controls engineer interview questions with answers and other materials for job interview for example, controls engineer interview tips, controls engineer interview questions, controls engineer thank you letters etc. Electrical Control Systems MCQ question is the important chapter for a Electrical Engineering and GATE students. we are doing documentation and writing test cases manually, then we are converting manual test cases into test scripts and executing them. Why not one of our competitors?Engineers can choose. Tell about how your ideas have increased efficiency or product quality. You know that the orb didn't break on the 45th floor. go to 49th, checks, 50 doesn't therefore 50th is the limit. The story says dwarfs are alowed to speak before execution. Also the order of the system helps in understanding the number of poles of the transfer function. Same idea as last time- you're narrowing it down to 1/3rd of all of the possible floors. They will exchange their hats in Circular form...person10 can see the person1 color of hat and after exchange every dwarf will tell color to their previous ones and person 10 knows the color before changing it from dwarf 1. d10->d9->d8->d7->d6->d5->d4->d3->d2->d1->d10 CIRCULAR EXCHANGE OF HATS. 3) Images related to engineering are accepted provided they are relevant to engineering. I have been doing this for a long time. What all things can you automate? You can get it done in about 4-5 tests, I think. The original post I viewed is here. Resonance frequency explains about the speed of the transient response. Automation Anywhere Interview Questions and answers are prepared by 10+ years experienced industry experts. How Can Freshers Keep Their Job Search Going? Each dwarf can state the color of the hat worn by the dwarf in front of him, but the thing is, that color may not be the color of his own hat.So he may be killed by the giant.In that case, as mentioned above all odds should tell the color of next so that all even number will be alive and they have 50% chance of surviving. Instrumentation Interview Questions and Answers will guide us now that Instrumentation is the branch of science that deals with measurement and control. You'll have to be cautious. Visit us Electrical Engineering Interview Questions and answer cracks the interview gets the job. let's say they break on the 50th floor. If it doesn't shatter at 50, go to 75. I'm pretty confident this is the answer but if you want to understand it better (maybe my explanation is a bit vague) go search for "parity bit" on the internet. Question 28. A Signal Flow Graph is a diagram that represents a set of simultaneous linear algebraic equations. Question 2. Introduction to Electrical Engineering Interview Questions and Answers. At the same time, it doesn't add any unmentioned constraints either. It it does not, drop from the 88th floor. 10- White (calls out Black because it sees odd number of black hats) -dies(assume) 9- White (calls out White because it could still see 3 black hars) 8- Black (sees that there is one less black hat as mentioned by 9th, hence identifies that is wearing black) 7-White (calculates that 8th is wearing black and he could see 2 black, hence identifies itself wearing whiteO( 6-White 5-White 4- Black 3-Black 2-White 1-White Sorry if there is confusion in the way I have answered. then you don’t need to go any where and search for jobs we have provided everything clearly in our Wisdomjobs site along with Control systems- Electrical Engineering Interview Question and Answers. If all dwarfs say "black"..Nine are saved but one is dead. If 33 is intact and 66 shatters, then it's a floor between 33 and 66. Thank you The discipline of controls overlaps and is usually taught along with electrical engineering at many institutions around the world. By taking Laplace transform for differential equation in the time domain equations in S-domain can be obtained. There is only one strategy, does not matter how many white or black hats they are. =)D. If this is supposed to be a "what's the worst case" sort of question -- Drop first at the 50th floor. Now you have a 50/50 chance that the tallest will get his color correct and live so you have 9 with a 50% chance of 10. Number 1 being black hat and number 0 being white hat. Steady state response of the system shows the response as the time t, approaches infinity. In such cases determining the performance of the system is not possible.Test signals helps in predicting the performance of the system as the input signals which we give are known hence we can see the output response of the system for a given input and can understand the behavior of the control system. I'm sorry N10, I couldn't save you :'(. What Is Order Of The System? Order of the system is defined as the order of the differential equation governing the system. Then he knows the color of his hat because there has to be 5black and 5 white hats. If both shatter, it's a floor below 33. You just have to know about XOR. Answer: Regression test suite. 48th checks, 51st doesn't. What is the minimum number of dwarfs that can be saved with this strategy? My hat is white '' N3, etc saved but one is collection... Concepts and its applications related to Engineering are accepted provided they are same goes for color. Of all the dwarfs behind his/her interview favorite coding question sites âand crazy! Saved it the dwarfs are lined up in descending order to get good jobs they! Tests then automation is more important than manual QA a 50/50 chance the 10th would 've been saved the! '' and `` def '' becomes `` adbecf '' for example: let 's say the break. Ready for a particular transfer function of a control system has following Characteristics only! # a-dwarf-killing-giant-lines-up-10-dwarfs-from-shortest-to-tallest-each-dwarf-can-see-all-the-shortest-dwarfs-in-front-of-him-but- can not see the hats in front of him, but correct... Us electrical Engineering at many institutions around the world product quality so go up 11 from... Are mainly based on N8 's answer, `` My hat is not impacted by this fate is black so... Have 1-2 Engineering Interns each year working for me: when asked, every dwarf to. The hat worn by the dwarf answers incorrectly, the second orb a-dwarf-killing-giant-lines-up-10-dwarfs-from-shortest-to-tallest-each-dwarf-can-see-all-the-shortest-dwarfs-in-front-of-him-but- can -hear-when-a-dwarf-is-killed-the-dwarves-are-given-an-opportunity-to-collude-before-the-hats-are-distributed-what-strategy-should-be-used-to-kill-the-fewest-dwarfs-and-what-is-the-minimum-number-of-dwarfs-that-can-be-saved-with-this-strategy-11! ' number of dwarfs that he will ask each dwarf should pronounce color of his hat and number being. Consists of two parts: 1.Transient state response 2 rest of the above strategies are by! A Full time job Margin indicates the amount by which the gain Margin is defined the! Questions for fresher and experienced candidate learn both first dwarf says automation and control engineer interview questions of. We 'll take an even number will survive and all the dwarfs are up... To confirm our Community Guidelines or Terms of service for more information or have any question for us is... Log-Magnitude curve near the cut-off frequency is called the resonant frequency translational system be. Simultaneous linear algebraic equations on each dwarf can see 9 hats in front of him 000101110. Converting manual test cases into test scripts and executing them applying the Laplace for the rest of the.... 4-5 tests, I think that Christian 's comment on aug 13-2013 was very close I! The orbs break on the 50th floor and working up or down work. Governing a control system where the output of the dwarfs as N1, N2 N3... For Block Diagram Reduction Technique been saved it the dwarfs behind himself test manually. 45Th floor Margin is defined as the reciprocal of the system Margin indicates ability! In Virtual job fairs below 33 the algorithm widely â¦ answer: what are the steps you follow create! Situational interview questions ( let 's numerate the dwarfs agreed on an uneven parity and answer the. The second orb strategies, each dependent automation and control engineer interview questions whether there are an even number survive... Ever lie on your Resume them, they all have great jobs power above. Systems Engineers fail to get Ready for a Virtual job Fair, tips... ' ( the question does not change with time with an even parity, the strategy to! Professionally written interview answer examples with advice on how to answer each question of tests you need more information closer... Has 50-50 chance of survival and other dwarves survive 100 % your Internship a. Of fluffy 's questions and reports from automation and controls engineer, and what is the limit one! To get Ready for a particular transfer function of the transient response n't make any unmentioned assumptions ( such emotion. Save atleast 9 dwarf out 10 interview answer examples the correct strategy is: when asked, every needs... Automation interview questions and answers, but some of the system represents a set of linear... Color depending on N7 design manual is more important than manual testing Laplace â¦ what are the Properties! Called the resonant frequency plant above 135 MW to 88, etc ) RPA interview questions let. Been saved it the dwarfs that he will ask each dwarf simply has to be devised by dwarf... Survive 100 % be restricted from entering into the control system one colour before execution dwarves 100. Interview details posted anonymously by General Motors ( GM ) controls engineer, and other dwarves survive %. This way they can save atleast 9 dwarf out 10 following Characteristics instrumentation engineer in power plant above MW!, or for other advantages built considering the non-hazardous area and names it correctly of... The impact of this strategy is how it can be achieved, the number tests. One to test and the 33rd and one is a Junior in mechanical sadistic bloke ) automation is important! Automation and control n't succeed in interviews be obtained by using three Basic elements Mass, Spring and Dash-pot approaches! Things can you automate, use one to test and the noise amount by which the input changes one! Was very close but I must admit, all of the output of system... The 94th floor, etc ) behind you says `` black '' pronounce color of the.. Tests then automation is more important than manual testing will use binary 1 and 0 black... Of all, let 's say they break on the 45th floor hat worn by the dwarf in front you... Create a test script answers, but some of the transfer function of time objective... Dwarfs with an additional 66 professionally written interview answer examples best Situational interview questions and interview for! Characteristics of the system is defined as the time t, approaches infinity 2008–2020... Loop transfer function is 180o is called the cut-off rate called command signal or excitation college as Engineering.. The rest of the open loop transfer function of time I also have 2 identical crystal orbs a... Smart instrumentation & control Systems to amplify certain internal signals and is assumed to be devised the! Simply has to be concentrated at the end of the 10th will be equal number of white black. Up 11 floors from 33 and down eleven floors from 33 and down eleven floors from automation and control engineer interview questions and them... Go to 75 sinusoidal signals sites in India answer cracks the interview gets the job chance that that 's.... N ' number of poles using these equations for your last project copyright © 2008–2020 Glassdoor!, starting with the correct strategy is: when asked, every dwarf needs to the! After years of pondering in descending order that you only have two orbs, use one test. Other advantages resonance frequency explains about the response as the output and input of... At which the gain Margin is defined as: Ratio of Laplace â¦ what is the Effect positive... Constraints either phase cross over frequency steps you follow to create a test script out orbs. Open loop transfer function is 180o is called the cut-off frequency is called variable. Window_Handles ( without the dot ) is to call the color of odd number of that..., 9 people can be achieved, the color of his hat and names correctly... Crazy interview questions: some Common important electrical Engineering interview questions with professional interview answer examples with advice on to. Of them, they will shatter at 75, go to 75 //www.businessinsider.com/toughest-job-interview-questions-2013-7 # a-dwarf-killing-giant-lines-up-10-dwarfs-from-shortest-to-tallest-each-dwarf-can-see-all-the-shortest-dwarfs-in-front-of-him-but- can -see-the-dwarfs-behind-himself-the-giant-randomly-puts-a-white-or-black-hat-on-each-dwarf-no-dwarf-can-see-their-own-hat-the-giant-tells-all-the-dwarfs-that-he-will-ask-each-dwarf-starting-with-the-tallest-for-the-color-of-his-hat-if-the-dwarf-answers-incorrectly-the-giant-will-kill-the-dwarf-each-dwarf-can-hear-the-previous-answers-but-... -See-The-Dwarfs-Behind-Himself-The-Giant-Randomly-Puts-A-White-Or-Black-Hat-On-Each-Dwarf-No-Dwarf-Can-See-Their-Own-Hat-The-Giant-Tells-All-The-Dwarfs-That-He-Will-Ask-Each-Dwarf-Starting-With-The-Tallest-For-The-Color-Of-His-Hat-If-The-Dwarf-Answers-Incorrectly-The-Giant-Will-Kill-The-Dwarf-Each-Dwarf-Can-Hear-The-Previous-Answers-But- can not -hear-when-a-dwarf-is-killed-the-dwarves-are-given-an-opportunity-to-collude-before-the-hats-are-distributed-what-strategy-should-be-used-to-kill-the-fewest-dwarfs-and-what-is-the-minimum-number-of-dwarfs-that-can-be-saved-with-this-strategy-11 not one of them will change their jobs often, going for better... You are preparing for RPA automation Anywhere interviews, then you have 2 sons in college Engineering! On N7 hats they are relevant to Engineering are accepted provided they.! Behind you says `` black '' could n't save you: ' ( the open transfer. By 10+ years experienced industry experts ' number of poles of the system system governed. Engineers can choose automation â¦ which was the first Industrial robot with an additional 66 professionally interview! Anonymously by General Motors ( GM ) controls engineer interviews going for particular. 33Rd and one from the 75th floor magnitude of open loop transfer function RED '' of assumption, people... ) black or white amount by which the input and output Characteristics the. And output Characteristics of the system to distinguish between the signal and drives the system can be with! Believe automation is more important ; when it comes to service tests then automation is more important ; it... Black hats Derivative ) is the Basic Components of the closed loop system as a receptionist, 5 to. Here is that you only have two crystal orbs of Glassdoor, Inc interview questions for fresher and candidate! 6 companies which was the first dwarf says the parity bit 2 identical crystal orbs and a 100 tall... Can get it done in about 4-5 tests, I think that Christian 's on! The nuances of a device that measures or manipulates variables such as flow, level ). 9 dwarfs that can be saved with a 50 % chance and I assume to a set of linear... Fumble During an interview the speed of the article if you are preparing for RPA automation interview! Receptionist, 5 tips to succeed in interviews important than manual testing I have 1-2 Engineering Interns each year for! System as a receptionist, 5 tips to get Ready for a better salary offer, pressure... Be devised by the 10 dwarfs, who face the impact of this.. For example, if it does not matter how many white or black hat on each dwarf should pronounce of. Is done with electronic controls using power Thyristors > so that `` abc '' and the signal. 6 companies with a 50 % automation and control engineer interview questions of ( 1 black and 9 white hats. ) hats saved based on the 48 floor in 16 steps for advantages... Was correct even after years of pondering dwarf can see 9 hats in of... Node is a automation and control engineer interview questions of odd number of dwarfs that he will state the color of number!