Which one between if-else and switch is more efficient?

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Explain explicit container.

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What is scope in c++ with example?

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what is data Abstraction

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Describe private, protected and public – the differences and give examples.

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What issue do auto_ptr objects address?

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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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What is the use of this pointer in c++?

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Is c++ proprietary?

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Why do we need constructors in c++?

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State the difference between pre and post increment/decrement operations.

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What is bubble sort c++?

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