GATE CS 2021 : Data Structure 4

Choose the invalid identifier from the below

Which of the following is a logical OR operator?

Which of the following variable cannot be used by switch-case statement?

Which combination of the integer variables x, y and z makes the variable a get the value 4 in the following expression? a = (x > y)? ((x > z)? x : z): ((y > z)? y : z)

Consider the following variable declarations and definitions in C

Let x be an integer which can take a value of 0 or 1. The statement if(x = =0) x = 1; else x = 0; is equivalent to which one of the following?