Leadership Development Interview Questions
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Leadership Development interview questions shared by candidates
Q2: A pnp transistor with its base connected to a voltage source, the V source is connected to a +10V source. The emitter of the transistor is connected to a resistance, and then to the same +10V source. The collector side is connected to a capacitor, which is not charged at t=0-. Given the graph of Vsource = 10 V stepping up at t = 0 to further, draw the graph of Vout. Vout is between the point of collector and capacitor.
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I just made it back from Lutron's HQ and I was asked for the same question. My first approach will be identifying a PNP BJT, and elaborating all 4 BJT operating regions. Before t = 0, since q = 0, by using Q = CV, we can tell that the voltage across the capacitor is 0. Hence, Vo = -10V before t = 0. Recall the capacitor's current equation: I = C*(dv/dt), we can solve for the slope of changing voltage -> dv/dt = I/C. Here, I is simply the BJT's collector current, which can be found by looking at the BJT's emitter current. Given that the (beta) parameter is infinite, we see the base current to be 0. Now, at this point, we need to look for I_E. Since the R is given to be 9.3k, and VEE = 10V, it is natural to assume V_EB = 0.7V, and thus the voltage across R = 9.3V. Therefore, I_E = 9.3/9300 = 1mA. Voila, we now values for all currents: I_E = I_C = 1mA, and I_B = 0A. Plug the I_C value into the equation: I_C/C = dv/dt (C = 1uF). We know that the slope of the voltage change is 1000V/second, or 1 Volt per millisecond. Now, we know the capacitor voltage raises at 1V/ms from -10V, but we also need to know where is the upper limit. Looking back to the BJT basics about operating regions and BJT's 2-diode model, it is not hard to identify that this PNP BJT must operate in "Saturation" region (NOT IN "ACTIVE" REGION!). The boundary of that region is V_BC <= 0.7V (I hope everybody is able to solve for this). Hence, 0.7V will be the upper limit for capacitor voltage. At this point, you will have a flat line at Vo = -10V before t = 0. and raises at 1V/ms for 10.7ms and hit Vo = 0.7V. From t = 10.7ms and on, the Vo stays at 0.7V. Less
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ANS: Vout should be constantly -10V until t=0, and will hit V=0 V linearly from V=-10 V after t=0. Less
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Hi, Can you explain why it linearly increases? Are you assuming that Collector is tied to -10V? The pnp transistor is completely cutoff for the given biasing. The only way the capacitor is going to charge is through leakage currents. It is very slow and takes a lot of time. Please advise me if my analysis is correct. Less
Why bell? Any obstacle in your career? Strength?
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how long after your interview did you get a change in status? i did mine on saturday and still nothing. do they let you know if you arent chosen ? Less
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I feel like getting an interview is also dependent on luck. Its seems like you have a good background for a new grad position. Also did you make sure you didn't get your bachelors prior to 2019 since you did a 2 years masters? I believe that was one of the requirements for Bell GLP. Less
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@Anonymous Wow August 26th and they are replying right now!!! I thought I had to wait awhile for a reply. Here's been my journey with the process 1) I applied for the Finance rotational program and Network GLP on September 8th and 9th. 2) Did a video questionnaire on September 10th 3) Applied for top 3 position in Network GLP on September 13th. 4) Got a call 2nd week October for a group interview the next week. 5) Attended the group interview in mid October for the Network GLP position. After the group interview I haven't really gotten any updates. On the career portal my applications were last seen on October 10th. I also reached out to some of the people I had my group interview with and they haven't heard back either. Less
Just entertain me for five minutes, I'm not going to talk
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Great! Let me walk you through my resume, my experience and my qualifications for this position. I must admit, this will be a refreshing change of pace where I can complete my train of thought. I appreciate your silence. I can answer any of your questions after I finish. My career objective is........... In other words, use this time for your personal sales pitch! Less
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I am not going to talk either. The entertainment will be to see how much we can communicate with each other using only gestures, facial expressions and body language. Go! Less
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Thanks for your time.
Why bell?
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In Bell portal, the statuses of all three applications I submitted are "In progress" Less
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Which one did you apply to? BI or Network?
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I applied for Network, Ontario
what are your strengths/weaknesses what appeals to you about the career track you are interested in?
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I received an offer today via phone. She gave me a lot of information about the job, salary, location, ect. My official offer will be emailed to me tomorrow. Less
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What is the average salary for the program?
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Just as a heads up for everyone, just because you are eligible for the program doesn't guarantee you a job. They only take on 400 A2L's per year, half in February and the other half in July. There are a lot more people accepted into the program, and then they decide from there who gets the jobs based on job and location preferences. I know some people who waited 3+ months after to hear back after receiving the "eligible email". Source: Current A2L Less
How many snow shovels sold in the US last year?
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There are roughly 400 million people in the US About 100 million people live in areas where having a snow shovel would make sense (NY and Pennsylvania are large) A snow shovel likely only needs to be replaced every 10 years 100/10 = 10 million The average home size is ~2.5 10/2.5 = 4 million homes each home likely has about 1.5 shovels on average 4*1.5 = 6 My educated guess would be 6 million (although my intuition is this is a little high) Less
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Greater than the number of Tasers
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All of them. Every single one that was purchased.
How did you prepare your interview? Describe your customer services experience.
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Hi Everyone, I had the same situation. Just got email that application moved to next round. Please stay in touch and share your experience. Thanks Less
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I think I waited for more than 10 days.
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I gave the video interview on 30 sept. No response as of yet. Has any of you guys received anything? its a bit frustrating. Less
When is a time you used data
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Same here. I am still waiting to get a response.
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It's been a week since I did the one-way interview, still waiting to hear back as well. Less
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I got the invite for the next round 2 weeks after one-way interview.
How are M&M's made?
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When a Mommy M and a Daddy M love each other very, very much.... Seriously, they make the chocolate first, cool it, separate them into their smaller spheres, then put into Panners where the sugar layers are added, dyed the different colors, then waxed (no kidding, very thin layer though). Then they go down a conveyor belt to get the M stamped on them. Less
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I said that the chocolate was solid and then dipped into the candy shell
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They use hybrid dung beetles to roll the balls in candy coating! Going Green at M&M's Less
Why would you like to work for Ryder?
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Big company..like working in logistics and I am a leader.
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I would like to be considered for a driving position in your company
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By giving him five gallons of fuel