What does the radix or base of a positional number system represent?

Which expression is logically equivalent to !(x == y)?

Why is the address operator (&) normally placed before an integer variable used with scanf?

Which symbol is missing from the case label in this code?switch (grade){ case ‘A’ printf(“Excellent”); break;}

Match each C element with its primary purpose.

What is the value of the expression (double)7 / 2?

Assume a character variable named operation has already been declared and assigned a value. Write a switch statement that displays “Add” when operation is ‘A’, “Subtract” when it is ‘S’, “Multiply” when it is ‘M’, and “Invalid operation” for every other value. Do not write a complete program.

Which statement correctly compares unsigned and signed integer overflow in C?

Which expression causes a compile-time constraint violation because the remainder operator requires integer operands?

Which is the syntactically correct way to test a second condition after an if condition is false?