Constants

What will be the output of the following C code?
#include
int main()
{
enum {ORANGE = 5, MANGO, BANANA = 4, PEACH};
printf("PEACH = %d\n", PEACH);
}
1. PEACH = 3
2. PEACH = 4
3. PEACH = 5
4. PEACH = 6
What will be the output of the following C code?

#include
int main()
{
printf("C programming %s", "Class by\n%s NeedBook", "WOW");
}
1. C programming Class by
  WOW NeedBook
2. C programming Class by\n%s NeedBook
3. C programming Class by
  %s NeedBook
4. Compilation error
In the following code snippet, character pointer str holds a reference to the string ___________

char *str = "NeedBook\0" "training classes";
1. NeedBoook
2. NeedBook\0training classes
3. NeedBooktraining classes
4. Invalid declaration
. What will be the output of the following C code?

#include
#define a 10
int main()
{
const int a = 5;
printf("a = %d\n", a);
}
1. a = 5
2. a = 10
3. Compilation error
4. Runtime error
What will be the output of the following C code?

#include
int main()
{
int var = 010;
printf("%d", var);
}
1. 2
2. 8
3. 9
4. 10
What will be the output of the following C function?

#include
enum birds {SPARROW, PEACOCK, PARROT};
enum animals {TIGER = 8, LION, RABBIT, ZEBRA};
int main()
{
enum birds m = TIGER;
int k;
k = m;
printf("%d\n", k);
return 0;
}
1. 0
2. Compile time error
3. 1
4. 8
What will be the output of the following C code?

#include
#define MAX 2
enum bird {SPARROW = MAX + 1, PARROT = SPARROW + MAX};
int main()
{
enum bird b = PARROT;
printf("%d\n", b);
return 0;
}
1. Compilation error
2. 5
3. Undefined value
4. 2
What will be the output of the following C code?

#include
#include
int main()
{
char *str = "x";
char c = 'x';
char ary[1];
ary[0] = c;
printf("%d %d", strlen(str), strlen(ary));
return 0;
}
1. 1 1
2. 2 2
3. 2 2
4. 1 (undefined value)
enum types are processed by _________
1. Compiler
2. Preprocessor
3. Linker
4. Assembler
What will be the output of the following C code?

#include
int main()
{
printf("NeedBook\rclass\n");
return 0;
}
1. NeedBookclass
2. NeedBook
  class
3. classook
4. NeedBook
. What will be the output of the following C code?

#include
int main()
{
printf("NeedBook\r\nclass\n");
return 0;
}
1. NeedBookclass
2. NeedBook
  class
3. classook
4. NeedBook
What will be the output of the following C code?
#include
int main()
{
const int p;
p = 4;
printf("p is %d", p);
return 0;
}
1. p is 4
2. Compile time error
3. Run time error
4. p is followed by a garbage value
What will be the output of the following C code?

#include
void main()
{
int k = 4;
int *const p = &k;
int r = 3;
p = &r;
printf("%d", p);
}
1. Address of k
2. Address of r
3. Compile time error
4. Address of k + address of r
Which of the following statement is false?
1. Constant variables need not be defined as they are declared and can be defined later
2. Global constant variables are initialized to zero
3. const keyword is used to define constant values
4. You cannot reassign a value to a constant variable
What will be the output of the following C code?

#include
void main()
{
int const k = 5;
k++;
printf("k is %d", k);
}
1. k is 6
2. Error due to const succeeding int
3. Error, because a constant variable can be changed only twice
4. Error, because a constant variable cannot be changed
What will be the output of the following C code?
#include
int const print()
{
printf("NeedBook");
return 0;
}
void main()
{
print();
}
1. Error because function name cannot be preceded by const
2. NeedBook
3. NeedBook is printed infinite times
4. Blank screen, no output
What will be the output of the following C code?
#include
void foo(const int *);
int main()
{
const int i = 10;
printf("%d ", i);
foo(&i);
printf("%d", i);

}
void foo(const int *i)
{
*i = 20;
}
1. Compile time error
2. 10 20
3. Undefined value
4. 10
What will be the output of the following C code?

#include
int main()
{
const int i = 10;
int *ptr = &i;
*ptr = 20;
printf("%d\n", i);
return 0;
}
1. Compile time error
2. Compile time warning and printf displays 20
3. Undefined behaviour
4. 10
What will be the output of the following C code?

#include
int main()
{
j = 10;
printf("%d\n", j++);
return 0;
}
1. 10
2. 11
3. Compile time error
4. 0
Will the following C code compile without any error?
#include
int main()
{
for (int k = 0; k < 10; k++);
return 0;
}
1. Yes
2. No
3. Depends on the C standard implemented by compilers
4. Error
Will the following C code compile without any error?

#include
int main()
{
int k;
{
int k;
for (k = 0; k < 10; k++);
}
}
1. Yes
2. No
3. Depends on the compiler
4. Depends on the C standard implemented by compilers
Which of the following declaration is not supported by C?
1. String str;
2. char *str;
3. float str = 3e2;
4. Both String str; & float str = 3e2;
Which of the following format identifier can never be used for the variable var?

#include
int main()
{
char *var = "Advanced Training in C by NeedBook";
}
1. %f
2. %d
3. %c
4. %s
Which of the following declaration is illegal?
1. char *str = “Best C programming classes by NeedBook”;
2. char str[] = “Best C programming classes by NeedBook”;
3. char str[20] = “Best C programming classes by NeedBook”;
4. char []str = “Best C programming classes by NeedBook”;
Which keyword is used to prevent any changes in the variable within a C program?
1. immutable
2. mutable
3. const
4. volatile
Which of the following is not a pointer declaration?
1. char a[10];
2. char a[] = {‘1’, ‘2’, ‘3’, ‘4’};
3. char *str;
4. char a;
What will be the output of the following C code?
#include
void main()
{
int k = 4;
float k = 4;
printf("%d", k)
}
1. Compile time error
2. 4
3. 4.0000000
4. 4.4
Which of the following statement is false?
1. A variable defined once can be defined again with different scope
2. A single variable cannot be defined with two different types in the same scope
3. A variable must be declared and defined at the same time
4. A variable refers to a location in memory
A variable declared in a function can be used in main().
1. True
2. False
3. True if it is declared static
4. None of the mentioned
The name of the variable used in one function cannot be used in another function.
1. True
2. False

Constants

Quiz