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Bhel Instrumentation Interview Questions
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HOW TO DO PERFECT CALIBRATION OF DIFFERENTIAL PRESSURE TRANSMITTER FOR CLOSE VESSEL TANK LEVEL PURPOSE ???? AND HOW TO MAKE ZERO PRESSURE ?? Rosemount 2051 Pressure Transmitter with HART® Revision 5 and 7 Selectable Protocol BIENG USED !! HOW TO CALIBRATE FIELD SIDE DPT WITH THE HELP OF SPAN & ZERO PUSH BUTTONS ??

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Boiler flame scanner working principle?

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How do I restart iis in windows?

406


Explain some most commonly use string functions in php?

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What is the use of list in java?

446


I need help with the following lab. Can anyone explain it to me on how to approach this problem. Coding would be great too !!! No busy waiting allowed. Remember that Java monitors are 'signal and continue'. The input data is called the database (DB). In this problem, it consists of a single variable initialized in the main thread, to contain the current time of day in HH:MM:SS:mmm format (mmm is milliseconds) truncated to 3 digits. Threads follow these rules: 1. Readers may all attempt to read at the same time, but NOT if a writer is writing (i.e.; the writer is in the monitor. 2. Writing is exclusive (only 1 writer at a time, no readers while writing). 3. Options: (to be specified by instructor) a. Readers have absolute priority over writers. b. Writers have absolute priority over readers c. When a reader arrives and a writer is waiting, the reader is suspended behind the writer instead of being admitted immediately. Thus, a writer waits for readers that were running when it arrived, but does not to wait for new readers. You may program this in C++ or Java. There are 4 controlling input values: 1. r – number of readers 2. w – number of writers 3. R – delay for a reader to restart 4. W – delay for a writer to restart Create the following program consisting of 1 main process (your main program) with n threads: 1. The main thread: a. Creates the 'n' threads needed. Of these, r of them are readers and w of them are writers. Starts all readers and writers. b. Waits for all 'n' threads to complete. You may use any method to detect when they are all complete. c. Prints out the resulting outputs from the threads. 2. Threads: a. When a thread starts to run, it immediately tries to enter the monitor. b. A reader thread reads the DB, outputs the exact message below, then exits: >>> DB value read =: HH:MM:SS:mmm by reader number: rr where the underlined text is replaced with actual data. c. A writer thread updates the DB with a new value (from the system time), outputs the exact message below, then exits: *** DB value set to: HH:MM:SS:mmm by writer number: ww where the underlined text is replaced with actual data. d. Each thread accesses the data a total of 10 times, exiting, then re-entering the monitor after each access. Hints: 1. File access *might* not be thread-safe, so you should be prepared to handle this. Read the documentation for the language you are using. 2. Suggested values for delays are: a. If looping, R >=1,000,000 and W>=100,000 b. If using “sleep”, then R=100 ms, W=50 ms. Additional: • Thread output is to ONE file used by ALL threads (so you need to synchronize access to it). • Readers must provide sufficient delay that results are useful (delay by R before re-trying). R is another input value. • Writers must also delay. Delay by W, updating the DB each time. W is an input. • Test your program with AT LEAST TWO different sets of values for r and w (#s of readers and writers) plus this set: r = 4, w=2. Basic operation of a thread: attempt to enter the monitor. If unsuccessful, you get put on a queue. When you get in, read or write the data (depending on type of thread), exit the monitor, wait the required delay amount, then try again. Repeat 10 times.

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What is star, snowflake and star flake schema? : sql server analysis services, ssas

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What are the attributes can be used during creation of a new angularjs directives?

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What is the difference between pop and pop3?

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How a/b testing is performed for an ios app?

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there are 67 seats in train . there are only 5 seats in a row and in last row there are only 2 seats. One person can reseve only 5 seat at a time. If person reserving seat , the care is atken that he may get all in row. if seats are not available in row then the arrangement is so that person group get nearby seats. the following class is given public class seat { char name; int seat; boolean isSeatempty } 1.Draw require class digram and object diagram. 2.Write function seatallot(int noofperson) to allocate seat with seat nuber printed for the each name.

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What are the experience-based testing techniques?

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what is s000 u4087 error? please give the all error codes in cobol,jcl.

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What are the types of shell in linux?

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what is the difference between Tally ERP 9 and Tally 7.2?

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What is analytic snapshot ?

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If you had a tablespace, test_tablespace, which consists of three files:test01.dbf, test02.dbf, and test03.dbf, and someone accidentally used the unix command"rm" to delete the file test02.dbf, what else would you need in order to recover all the data thatwas present in test_tablespace at the time that test02.dbf was deleted?

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