C Interview Questions
Questions Answers Views Company eMail

Diff: between this 2 classes in terms of memory class A { int i; char c; double d; }; class A { double d; int i; char c; }; How it is calculating?

HCL,

1 4554

A float occupies 4 bytes in memory. How many bits are used to store exponent part? since we can have up to 38 number for exponent so 2 ki power 6 6, 6 bits will be used. If 6 bits are used why do not we have up to 64 numbers in exponent?

1764

write a c program that prints all multiples of 3between 1 and 50.

5 28286

c program to print a name without using semicolon

TCS, Wipro,

9 10934

program that accepts amount in figures and print that in words

Infosys, Lovely Professional University, Wipro,

2 5087

Write a program using two-dimensional array that lists the odd numbers and even numbers separately in a 12 input values.

1 14771

write a programme to convert temperature from farenheit to celcius?

IBM,

4 8274

please explain every phase in the "SDLC" in the dotnet.

2173

If i have an array 0 to 99 i.e,(Size 100) I place the values 1 to 100 randomly like a[0]=29,a[1]=56 upto array[99].. the values are only between 1 to 100. getting the array values by using scanf.. If i entered one wrong element value line a[56]=108. how can i find it.. and also how to find the missing value in 1 to 100.. and i want to replace the missing values.. any one of them know please post your answer..

IBM, Wipro,

1578

diff between exptected result and requirement?

HCL,

1589

Between macros and functions,which is better to use and why?

1561

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.

1502

disply the following menu 1.Disply 2.Copy 3.Append; as per the menu do the file operations 4.Exit

1621

print 1-50 with two loop & two print Statement

2 4072

what is the difference between %d and %*d in c languaga?

TCS,

7 20137


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Un-Answered Questions { C }

In C programming, what command or code can be used to determine if a number of odd or even?

612


What is the size of a union variable?

589


What are the modifiers available in c programming language?

722


What is typedef struct in c?

575


What is the use of a static variable in c?

582






What is operator precedence?

635


what is a constant pointer in C

664


If jack lies on Mon, Tue Wed and jill lies on Thursday, Friday and Saturday. If both together tell they lied yesterday. So c the given options and then c cos in the given dates one will be saying the truth and one will be lying. I got Thursday as option because jack is saying the truth he lied yest but jill is lying again as he lies on that day.

1779


Are the expressions * ptr ++ and ++ * ptr same?

657


What is the difference between char array and char pointer?

519


What is the difference between text files and binary files?

665


Do pointers store the address of value or the actual value of a variable?

601


Explain what is wrong with this program statement? Void = 10;

754


Why is structure padding done in c?

635


What is the benefit of using #define to declare a constant?

598