C Programming Language MCQ Exercise 2

1. When the C gets function is used, which of the following can cause problems?

1. Read-only information from files.
2. The input string is not null-terminated.
3. Causes buffer overflow vulnerabilities.
4. Can only read a predetermined number of characters.

2. Which of the following options describes the functions of the setjmp and longjmp functions in C?

1. Longjmp sets its destination with setjmp and creates a non-local goto.
2. Longjmp sets the destination, and setjmp is a non-local goto.
3. Non-local goto are generated by both setjmp and longjmp.
4. Longjmp is a local goto, and setjmp sets a local jump.

3. Regarding structural padding in C, which of the following is true?

1. Structural padding is used to conserve memory.
2. Structure padding guarantees that parts of the structure fit well in memory.
3. Only the array is affected by structural padding.
4. Structural padding is used to ensure that structures are the same size.

4. Which of the following actions in C are negated?

1. Adding a pointer with an integer.
2. Deducting a number from a reference.
3. Analyzing two arrows.
4. Incrementing an integer with a pointer.

5. What does it mean when the extend keyword is used for variable declaration in C programming?

1. It means that the variable is defined globally in another file.
2. The variable is a globally accessible local variable.
3. Variables are allocated dynamically at runtime.
4. For quick access, the variable is kept in a register

6. What is the effect of the sizeof(char) expression in C?

1. 0
2. 1
3. Depends on the system
4. 4

7. Which of the following option represent a segmentation failure in C?

1. Error resulting from a division of zero.
2. An error caused by a syntax error in the program.
3. Error resulting from an infinite loop.
4. An error is raised when a program tries to access the memory which is not authorized.

8. Which of the following refers to the use of assert.h in C?

1. It provides ways to allocate memory dynamically.
2. Provides a means to terminate the program if a condition is not met.
3. It has functions to perform calculations in mathematics.
4. Provides features for managing file input/output systems.

9. What is the main function of C's inline keyword?

1. To recommend that the function be optimized by the compiler to run more quickly.
2. To recommend that the function be expanded inline at the place of call by the compiler.
3. To enable access to the function from other translation units.
4. To make the function's implementation in assembly language mandatory.

10. What is the use of C #define directive?

1. Macros are defined for functions or constants.
2. Includes program standard libraries.
3. The memory is allocated dynamically.
4. If a condition becomes false, it closes the program.