Question-61. How does bitwise operator XOR works ?
Answer- If both the corresponding bits are same it gives 0 else 1.
Question-62. What is an infinite loop ?
Answer- A loop executing repeatedly as the loop-expression always evaluates to true such as
while(0 == 0) {
}
Question-63. Can variables belonging to different scope have same name ? If so show an example.
Answer- Variables belonging to different scope can have same name as in the following code snippet.
int var;
void f() {
int var;
}
main() {
int var;
}
Question-64. What is the default value of local and global variables ?
Answer- Local variables get garbage value and global variables get a value 0 by default.
Question-65. Can a pointer access the array ?
Answer- Pointer by holding array’s base address can access the array.
Question-66. What are valid operations on pointers ?
Answer- The only two permitted operations on pointers are
i) Comparision ii) Addition/Substraction (excluding void pointers)
Question-67. What is a string length ?
Answer- It is the count of character excluding the ‘\0’ character.
Question-68. What is the built-in function to append one string to another ?
Answer- strcat() form the header string.h
Question-69. Which operator can be used to access union elements if union variable is a pointer variable ?
Answer- Arrow (->) operator.
Question-70. Explain about ‘stdin’ ?
Answer- stdin in a pointer variable which is by default opened for standard input device.