Why should we use null or zero in a program?


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More C++ General Interview Questions

Why c++ is the best language?

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int f() { int I = 12; int &r = I; r += r / 4; int *p = &r; *p += r; return I; } Referring to the sample code above, what is the return value of the function "f()"? a) 12 b) 15 c) 24 d) 17 e) 30

2 Answers   AIG, Quark,


What is c++ similar to?

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What is a null object in c++?

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What is the use of endl in c++ give an example?

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What does #define mean in c++?

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Which algorithm do you like the most? Why?

2 Answers   Google,


Why can’t you call invariants() as the first line of your constructor?

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Can turbo c++ run c program?

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What is the difference between while and do while loop?

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What are the various storage classes in C++?

0 Answers   Fidelity,


Read the following program carefully and write the output of the program. Explain each line of code according to given numbering. #include <stdio.h> #include <unistd.h> #include <stdlib.h> #include <errno.h> 1……………… int main (void) { pid_t pid; 2………………………… pid = fork(); 3…………………………. if (pid > 0) { int i; 4………………………… for (i = 0; i < 5; i++) { 5………………… …………… printf(" I AM VU : %d\n", i); 6………………… …………… sleep(1); } exit(0); } 7………………… ……… else if (pid == 0) { int j; for (j = 0; j < 5; j++) { 8……………………………… printf(" I have no child: %d\n", j); sleep(1); } _exit(0); } else { 9………………………………fprintf(stderr, "can't fork, error %d\n", errno); 10……………… … ………… exit (EXIT_FAILURE); } }

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