Question 1

Total Number Of Keywords In C Are
A)30
B)12
C)34
D)32

Accepted Answer

The C programming language has 32 keywords that are reserved for specific functions and cannot be used as identifiers.

Question 2

The Compiler In C Ignores All Text Till The End Of Line Using
A)//
B)/
C)*/
D)/*/

Accepted Answer

The compiler in C ignores all text till the end of the line when it encounters "//". This is used for single-line comments.

Question 3

Printf() Belongs To Which Library Of C
A)Stdlib.H
B)Stdio.H
C)Stdout.H
D)Stdoutput.H

Accepted Answer

Printf() is a standard input/output library function, and it is defined in the stdio.h header file in C.

Question 4

What Is Correct Order Of Precedence In C
A)Addition, Division, Modulus
B)Addition, Modulus, Division
C)Multiplication, Substration, Modulus
D)Modulus, Multiplication, Substration

Accepted Answer

In C, the correct order of precedence is: Multiplication, Division, and Modulus have the same precedence and are evaluated from left to right, followed by Addition and Subtraction.

Question 5

Int Main() {
Extern Int I;
I = 20;
Printf("%D", Sizeof(I));
Return 0;
}
A)20
B)0
C)Undefined Reference To I
D)Linking Error

Accepted Answer

The program will result in an "Undefined Reference to I" error because the variable 'I' is declared with the 'extern' keyword, indicating it is defined in another file or location, but no actual definition or storage is provided for 'I' within this code or externally.

Question 6

Is The Following Statement A Declaration Or Definition Extern Int I;
A)Declaration
B)Definition
C)none
D)all

Accepted Answer

The statement "extern int i;" is a declaration because it declares the existence of an integer variable named 'i' without allocating memory or assigning it a value. The 'extern' keyword specifies that the definition of 'i' is elsewhere, possibly in another file.

Question 7

Int Main() {
Int X = 10;
{
Int X = 0;
Printf("%D",X);
}
Return 0;
}
A)10
B)Compilation Error
C)'0'
D)Undefined

Accepted Answer

The inner block defines a new variable `x` with the same name but it is scoped to the inner block. Therefore, the `printf` statement prints '0', the value of the inner `x`.

Question 8

//This Program Is Compiled On 32 Bit DEV-C++
Int Main()
{
Char *Ptr1, *Ptr2;
Printf("%D %D", Sizeof(Ptr1), Sizeof(Ptr2));
Return 0;
}
A)1 1
B)2 2
C)4 4
D)none

Accepted Answer

In a 32-bit environment, the size of a pointer (regardless of its type) is 4 bytes. Therefore, both Ptr1 and Ptr2, being pointers, have a size of 4 bytes each.

Question 9

What Should Be The Output:
Int Main()
{
Int A = 10/3;
Printf("%D",A);
Return 0;
}
A)3.33
B)3.0
C)3
D)Option.

Accepted Answer

The division operation 10/3 in integer context truncates the decimal part, resulting in 3. The printf statement with "%d" formats the output as an integer.

Question 10

Which Of The Following Is Executed By Preprocess?
A)#Include<Stdio.H>
B)Return 0
C)Void Main(Int Argc , Char ** Argv)
D)none

Accepted Answer

The #include directive is handled by the preprocessor, which includes the contents of the specified file (in this case, Stdio.h) into the program before compilation.

Question 11

Int Main() {
Int A = 10.5;
Printf("%D",A);
Return 0;
}
A)10.5
B)10.0
C)10
D)Compilation Error

Accepted Answer

The code will compile and run, printing "10" because the variable 'A' is declared as an integer, so the decimal part (.5) will be truncated, and only the integer part (10) will be printed.

Question 12

Int Main() {
Int _ = 10;
Int __ = 20;
Int ___ = _ + __;
Printf("__%D",___);
Return 0;
}
A)Compilation Error
B)Runtime Error
C)__0
D)__30

Accepted Answer

The code correctly declares and initializes variables `_` and `__` with values 10 and 20, respectively, and calculates their sum in variable `___`. The `printf` function then correctly prints `__30`, where `30` is the value of `___`.

Question 13

Int Main() {
Int A = 5;
Int B = 10;
Int C = A+B;
Printf("%I",C);
}
A)0
B)15
C)Undefined I
D)Any Other Compiler Error

Accepted Answer

The correct output of the program is 15, as it adds the values of A (5) and B (10) and stores the result in C, which is then printed. However, there are syntax errors in the code such as the use of "Int" instead of "int" and "Printf" instead of "printf", and "%I" should be "%d" for integer output, but the choice is based on the expected logical output ignoring these syntax issues.

Question 14

int main() {
Int x;x=10,20,30;
Printf("%d",x);
Return 0;
}
A)10
B)20
C)30
D)Compilation Error

Accepted Answer

The assignment operator has higher precedence than the comma operator, so x is assigned the value 10. The comma operator evaluates its first operand and discards the result, then evaluates the second operand and returns this value, but since the assignment to x happens first, the value 10 is what gets printed.

Question 15

How many times C.com is printed?
Int main()
{
Int a = 0;
While(a++ < 5-++a)printf("C.com");
Return 0;
}
A)5 times
B)4 times
C)3 times
D)1 times

Accepted Answer

The loop condition `a++ < 5-++a` will only be true for the first iteration. Initially, `a` is 0. During the condition check, `a++` increments `a` after its value is used, and `++a` increments `a` before its value is used, resulting in `a` being incremented twice in the condition check. Thus, after the first iteration, `a` becomes 2, and the condition becomes false (`2 < 5-3`), so "C.com" is printed only once.

Question 16

How many times C.com is printed?
Int main()
{
Int a = 0;
While(a++ < 5)printf("C.com");
Return 0;
}
A)5 times
B)4 times
C)3 times
D)1 times

Accepted Answer

The loop condition `a++ < 5` is true for `a` values 0, 1, 2, 3, and 4, resulting in "C.com" being printed 5 times.

Question 17

How many times C.com is printed?
Int main()
{
Int a = 0;
While(a++)printf("C.com");
Return 0;
}
A)1 time
B)0 time
C)Infinite times(Untill Stack is overflow)
D)2 times

Accepted Answer

The loop condition in the while loop checks the value of 'a' before it is incremented. Since 'a' is initialized to 0, the condition 'a++' evaluates to 0 (false) on the first check, and the loop body is not executed. Therefore, "C.com" is not printed at all.

Question 18

How many times C.com is printed?
Int main()
{
Int a = 0;
While(++a){printf("C.com");
}
Return 0;
}
A)1 time
B)Infinite Times(Untill Stack is overflow)
C)2 times
D)Error

Accepted Answer

The loop condition `while(++a)` will always be true except when `a` overflows and becomes 0 again, which will take a very long time, effectively causing the program to print "C.com" an infinite number of times until a stack overflow occurs or the program is forcibly terminated.

Question 19

What is output of below program?
Int main()
{
Int i,j,count;
Count=0;
For(i=0; i<5; i++);
{
For(j=0;j<5;j++);
{
Count++;
}
}printf("%d",count);
Return 0;
}
A)55
B)54
C)1
D)0

Accepted Answer

The semicolons after the for loops turn them into no-operation statements, so the block that increments `count` is executed only once.

Question 20

What is output of below program?
Int main()
{
Int i,j,k,count;
Count=0;
For(i=0;i<5;i++)
{
For(j=0;j<5;j++)
{
Count++;
}
}
Printf("%d",count);
Return 0;
}
A)5
B)10
C)25
D)50

Accepted Answer

The inner loop runs 5 times for each iteration of the outer loop, which also runs 5 times, resulting in 5*5 = 25 increments of count.

Quiz 2: C Programming Language

Total Number Of Keywords In C Are

The Compiler In C Ignores All Text Till The End Of Line Using

Printf() Belongs To Which Library Of C

What Is Correct Order Of Precedence In C

Int Main() { Extern Int I; I = 20; Printf("%D", Sizeof(I) ) ; Return 0; }

Is The Following Statement A Declaration Or Definition Extern Int I;

Int Main() { Int X = 10; { Int X = 0; Printf("%D",X) ; } Return 0; }

//This Program Is Compiled On 32 Bit DEV-C++ Int Main() { Char Ptr1, Ptr2; Printf("%D %D", Sizeof(Ptr1) , Sizeof(Ptr2) ) ; Return 0; }

What Should Be The Output: Int Main() { Int A = 10/3; Printf("%D",A) ; Return 0; }

Which Of The Following Is Executed By Preprocess?

Int Main() { Int A = 10.5; Printf("%D",A) ; Return 0; }

Int Main() { Int _ = 10; Int = 20; Int _ = _ + ; Printf("%D",___) ; Return 0; }

Int Main() { Int A = 5; Int B = 10; Int C = A+B; Printf("%I",C) ; }

int main() { Int x;x=10,20,30; Printf("%d",x) ; Return 0; }

How many times C.com is printed? Int main() { Int a = 0; While(a++ < 5-++a) printf("C.com") ; Return 0; }

How many times C.com is printed? Int main() { Int a = 0; While(a++ < 5) printf("C.com") ; Return 0; }

How many times C.com is printed? Int main() { Int a = 0; While(a++) printf("C.com") ; Return 0; }

How many times C.com is printed? Int main() { Int a = 0; While(++a) {printf("C.com") ; } Return 0; }

What is output of below program? Int main() { Int i,j,count; Count=0; For(i=0; i<5; i++) ; { For(j=0;j<5;j++) ; { Count++; } }printf("%d",count) ; Return 0; }

What is output of below program? Int main() { Int i,j,k,count; Count=0; For(i=0;i<5;i++) { For(j=0;j<5;j++) { Count++; } } Printf("%d",count) ; Return 0; }