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25-26 CS2850: Operating Systems

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Which of the following is not a basic data type in C?

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Let a1.out and a2.out be the executable files obtained by running 

 gcc -Wall -Werror -Wpedantic -o a1.out helloWorld1.c

and 

 gcc -Wall -Werror -Wpedantic -o a2.out helloWorld2.c
where helloWorld1.c is  

#include <stdio.h>
int main() {
        int i = 2;
        if (i==1) {
                printf("hello world!\n");
                i++;
        }
        if (i>1) printf("hello world!\n");
}

and helloWorld2.c is  

#include <stdio.h>
int main() {
        int i = 2;
        if (i==1) {
                printf("hello world!\n");
                i++;
                  if (i>1) printf("hello world!\n")
                  }
}

Select the true statements.

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Let a.out be the executable file obtained by running

gcc -Wall -Werror -Wpedantic helloWorld.c

where helloWorld.c is the code given below

 

#include <stdio.h>
#define N 10
int main() {
        for (int i = 2; i < N; i = i * 2) printf("%d) hello world!\n", i);
}
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Navigate to the directory you created for this week's lab exercise, CS2850Labs\week1. Recompile your program helloWorld.c as described in the lab sheet and check that your directory contains a new file called a.out. Open a.out with VIM by entering

vim a.out

In Escape mode, type 

:%!xxd -b

What do you see?

 

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Select all the correct statements about Android:

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A process declares a variable x, initialises it to 0, and then calls clone with CLONE_VM not set. The child process created by clone sets x to 3 and exits. Finally, the parent process prints x out. Which value is printed?

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Select all the correct statements about Linux file systems:

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Select all the correct statements about scheduling in Linux:

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Which of the following operations are performed by Linux when a process calls exec()?

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Which of the following lists does not correspond to a valid execution of the deadlock detection algorithm on the following resource allocation graph, with starting node B?

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