Here is a listing of C Objective Questions on “Error Handling” along with answers, explanations and/or solutions:
1. Which of the following causes an error?
a) Trying to read a file that doesn’t exist
b) Inability to write data in a file
c) Failure to allocate memory with the help of malloc
d) All of the mentioned
Answer: d
Clarification: None.
2. What is the purpose of the C function?
a) They check for input errors
b) They check for output errors
c) They check for all types of errors
d) They check for error in accessing the file
Answer: b
Clarification: None.
3. stderr is similar to?
a) stdin
b) stdout
c) Both stdout and stdin
d) None of the mentioned
Answer: b
Clarification: stderr is not exactly the same as stdout, but similar in the sense that both puts the output or error to the monitor.
4. What will be the output of the following C statement?
fprintf(stderr, "error: could not open filen");
a) The diagnostic output is directly displayed in the output
b) The diagnostic output is pipelined to the output file
c) The line which caused error is compiled again
d) The program is immediately aborted
Answer: a
Clarification: None.
5. Which of the following function can be used to terminate the main() function from another function safely?
a) return(expr);
b) exit(expr);
c) abort();
d) both exit(expr); and abort();
Answer: b
Clarification: None.
6. Which of the following causes an error?
a) Trying to read a file that doesn’t exist
b) Inability to write data in a file
c) Failure to allocate memory with the help of malloc
d) All of the mentioned
Answer: d
Clarification: None.
7. What is the purpose of the C function?
a) They check for input errors
b) They check for output errors
c) They check for all types of errors
d) They check for error in accessing the file
Answer: b
Clarification: None.