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DELL General Chemistry Interview Questions
Questions Answers Views Company eMail

What is the basicity/acidity of na2co3

1 5046

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Un-Answered Questions

How to setting up process definitions?

623


How would you determine who has added a row to a table?

1006


how to store the vacuum in tank? its possible? what are the units for measure the vacuum ?

710


we are about to implement a Test tool to test the performance of website, so what script does a tester should know (friends plz help me)

670


what is the filters in biztakk server? where it can use?

937






Following test should be conducted to find out relative polarity of transformenr terminals A no load test B back to back test C phasing out test D none of above

890


132/66kv sub-station procation ?

740


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.

733


how does the properties of an element changes by increasing protons and electrons?

1040


WE HAVE THE DC RECTIFIER 1500A, INPUT VOLTAGE IS 3 PHASE. HOW TO CALICULATE THE LOAD? 3 PHASE SIDE EITHER dC SIDE. PLEASE SUGGEST ME

628


what is core accounting?

1072


2. What functional area you worked on.

1112


hi to all, i need a code.. in flight application 1.i need to login first then i need to insert 3 new orders... 2.i have to log out 3.i have to login again with different user 4.need to insert 2 new orders 5.then need to log out 6.then again login with different user 7.3 new orders create and log out 8.but we hv to do this using data table and actions please help me

1012


What is the main purpose of HDFS fsck command?

549


What areas of SAS are you most interested in?

150






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