Which of the following cannot be checked in a switch-case statement?

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Which of the following cannot be checked in a switch-case statement?



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2) What will be the output of the following C code? (Assuming that we have entered the value 1 in the standard input)

 #include <stdio.h>
void main()
{
char *ch;
printf("enter a value between 1 to 3:");
scanf("%s", ch);
switch (ch)
{
case "1": printf("1");
break;
case "2": printf("2");
break;
}
}

3) Study the following 'C' program

 #include<stdio.h>
void main()
{
int a=7, b=5;
switch (a/a % b)
{
case 1 : a= a-b;
case 2 : a= a+b;
case 3 : a= a*b;
case 4 : a= a/b;
default : a= a;
}
}
On the execution of above program, what will be the value of variable a?

4) Consider the following code snippet:

 marks =80;
switch (marks)
{
case 60: grade = 'C';
break;
case 70: grade = 'B';
break;
case 80: grade = 'A';
break;
default: grade = 'E';
}
What is the value of 'grade' after the switch statement is executed?

5) A switch statement is used to:

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