R4RIN – MCQs, Mock Tests | C/C C MCQS:-The ABC of C

Point out which of the following variables names are valid:

1. variable_salary
2. var.
3. variable name
4. variable-sal

✅ Correct Answer: 1

C variables are case

1. insensitive
2. Sensitive
3. Both of the above
4. None of the above

✅ Correct Answer: 2

Binary equivalent of 762 is :-

1. 1001111010
2. 100000101
3. 1011111010
4. 1101111011

✅ Correct Answer: 3

Octal equivalent of 762 is:-

1. 1372
2. 1371
3. 7132
4. 7312

✅ Correct Answer: 1

A character variable can at a time store _ character(s):-

1. two
2. Infinite
3. three
4. one

✅ Correct Answer: 4

int a,b=6; a=++b + b++; value of a ?

1. 14
2. 15
3. 12
4. 0

✅ Correct Answer: 1

What will be the output of the following programs:- #include<stdio.h> int main() { printf("%d,%o,%x",72,72,72); }

1. 72,110,48
2. 72,72,72
3. 72,58,114
4. 72,48,144

✅ Correct Answer: 1

What will be the output of the following programs:- #include<stdio.h> int main() { char ch; printf("%d",sizeof(ch)); }

1. 2
2. 3
3. 1
4. 4

✅ Correct Answer: 3

What will be the output of the following programs:- #include<stdio.h> int main() { int i; printf("%d",sizeof(i)); }

1. Compiler error
2. Ascii value of i
3. 1
4. 4

✅ Correct Answer: 4

What will be the output of the following programs:- #include<stdio.h> int main() { float f; printf("%d",sizeof(f)); }

1. Compiler error
2. Ascii value of f
3. 4
4. 1

✅ Correct Answer: 3

What will be the output of the following programs:- #include<stdio.h> int main() { printf("%d",sizeof(char)); printf("%d",sizeof(int)); printf("%d",sizeof(float)); }

1. Compiler error
2. 144
3. 111
4. 1

✅ Correct Answer: 2

What will be the output of the following programs:- #include<stdio.h> int main() { printf("%d",sizeof(2)); }

1. 1
2. 2
3. 4
4. Compiler error

✅ Correct Answer: 3

What will be the output of the following programs:- #include<stdio.h> int main() { printf("%d",sizeof(2.0)); }

1. 4
2. 2
3. 1
4. Compiler error

✅ Correct Answer: 1

What will be the output of the following programs:- #include<stdio.h> int main() { float f=2.0; printf("%d,%d",sizeof(f),sizeof(2.0)); }

1. 4,4
2. 4,8
3. 8,8
4. 8,4

✅ Correct Answer: 2

What will be the output of the following programs:- #include<stdio.h> int main() { char ch=291; printf("%d,%c",ch,ch); }

1. 291,ch
2. 291,#
3. 35,#
4. 291,291

✅ Correct Answer: 3

What will be the output of the following program: #include<stdio.h> int main() { int a,b; a=-3- -3; b=-3- -(-3); printf("%d,%d",a,b); }

1. Runtime error
2. Compiler error
3. 0,6
4. 0,-6

✅ Correct Answer: 4

What will be the output of the following program: #include<stdio.h> int main() { int a; a=3*4%5; printf("%d",a); }

1. 12
2. 2
3. 0
4. None of the above

✅ Correct Answer: 2

What will be the output of the following program:#include<stdio.h>int main(){int a;a=3+4-7*8/5%10;printf(

1. 6
2. 10
3. 7
4. 0

✅ Correct Answer: 1

What will be the output of the following program: #include<stdio.h> int main() { int a; a=-3+4-7*8/5%10; printf("%d",a); }

1. 6
2. 10
3. 7
4. 0

✅ Correct Answer: 4

What will be the output of the following program: #include<stdio.h> int main() { int a; a=4%5+6%5; printf("%d",a); return 0; }

1. 0
2. 5
3. 1
4. None of the above

✅ Correct Answer: 2

What will be the output of the following program: #include<stdio.h> int main() { int a; a=-3*-4%-6/-5; printf("%d",a); return 0; }

1. 0
2. 10
3. 5
4. 7

✅ Correct Answer: 1

What will be the output of the following program: #include<stdio.h> int main() { printf("%d,",4/3); printf("%d,",4/-3); printf("%d,",-4/3); printf("%d",-4/-3); return 0; }

1. Compiler error
2. Runtime error
3. 1,-1,-1,1
4. 1,1,1,1

✅ Correct Answer: 3

What will be the output of the following program: #include<stdio.h> int main() { printf("%d,",4%3); printf("%d,",4%-3); printf("%d,",-4%3); printf("%d",-4%-3); return 0; }

1. 1,1,1,1
2. 1,1,-1,-1
3. compiler error
4. runtime error

✅ Correct Answer: 2

What will be the output of the following program: int main() { float a=5,b=2; int c; c=a%b; printf("%d",c); return 0; }

1. 1
2. 2
3. error
4. None of the above

✅ Correct Answer: 3

What will be the output of the following program: int main() { int c; c= 3 ** 4 - 7 ^ 8; printf("%d",c); return 0; }

1. Error
2. 18
3. 2
4. 4

✅ Correct Answer: 1

What will be the output of the following program: int main() { float a=5.b=2; int c; c=300000*300000/300000; printf("%d",c); return 0; }

1. -657
2. 657
3. -647
4. 647

✅ Correct Answer: 3

What will be the output of the following program:- int main() { float a=1.5; int b=3; a=b/2+b*8/b-b+a/3; printf("%d",a); return 0; }

1. 6.5
2. 6
3. 6.5
4. 0

✅ Correct Answer: 3

What will be the output of the following program:- int main() { int i=3,a=4,n; float t=4.2; n=a * a / i + i / 2 * t + 2 +t; printf("%d",n) return 0; }

1. 15
2. 15
3. 15
4. 0

✅ Correct Answer: 1

What will be the output of the following program:- int main() { int a,b; a=5.999999; b=5.000001; printf("%d,%d",a,b); return 0; }

1. 5.999999,5.000001
2. 5,5
3. 0,0
4. None of the above

✅ Correct Answer: 2

What will be the output of the following program:- int main() { float a; a=4/2; printf("%f,%f",a,4/2); return 0; }

1. 2,2
2. 2.000000,2.000000
3. 2.0,2.0
4. 2.000000,0.000000

✅ Correct Answer: 4

What will be the output of the following program:- int main() { printf("%d,%f",4,4); return 0; }

1. 4,4
2. 4,4.000000
3. 4,0.000000
4. error

✅ Correct Answer: 3

What will be the output of the following program:- int main() { printf("%d,%f",4.0,4.0); return 0; }

1. 4,0.000000
2. 4,4
3. 4,4.000000
4. 4.0,4.0

✅ Correct Answer: 3

What will be the output of the following program:- int main() { printf("%d",sizeof(4)/sizeof(2.0)); return 0; }

1. 1
2. 0
3. 2
4. error

✅ Correct Answer: 2

What will be the output of the following program:- int main() { printf("%d",sizeof(4.0)/sizeof(4)); return 0; }

1. 0
2. 1
3. 2
4. Error

✅ Correct Answer: 3

What will be the output of the following program,consider 10 as a input:- int main() { scanf("%d",&n); printf("%d",n); return 0; }

1. 10
2. 4
3. Error:undefined Symbol n
4. None of the above

✅ Correct Answer: 3

What will be the output of the following program:- int main() { int a=5,x; x=++a + a++ - ++a; printf("%d",a); return 0; }

1. 7
2. 5
3. 8
4. 6

✅ Correct Answer: 3

What will be the output of the following program:- int main() { int a=5,x; x=++a + a++ - ++a; x++; a=a + ++x; printf("%d",a); return 0; }

1. 17
2. 5
3. 12
4. 13

✅ Correct Answer: 1

What will be the output of the following program:- int main() { int a=5,x; x=++a + a++ + ++a; printf("%d,%d",x,a);}

1. 15,5
2. 15,8
3. 18,7
4. 21,8

✅ Correct Answer: 4

What will be the output of the following program:- int main() { int a=5,x; x=++a * a++; printf("%d,%d",x,a); return 0; }

1. 36,7
2. 25,7
3. 25,6
4. 25,5

✅ Correct Answer: 1

Binary representation of 345 is :-

1. 101010001
2. 110011001
3. 1011111001
4. 101011001

✅ Correct Answer: 4

Decimal representation of 101011001 is :-

1. 347
2. 276
3. 325
4. 345

✅ Correct Answer: 4

Decimal representation of 101010001 is :-

1. 317
2. 345
3. 337
4. None of the above

✅ Correct Answer: 3

Decimal representation of 110011001 is :-

1. 317
2. 409
3. 512
4. None of the above

✅ Correct Answer: 2

Decimal representation of 11111001 is :-

1. 249
2. 261
3. 256
4. None of the above

✅ Correct Answer: 1

Decimal representation of 11111111 is :-

1. 256
2. 257
3. 255
4. None of the above

✅ Correct Answer: 3

Octal representation of 11111001 is :-

1. 79
2. 371
3. 234
4. None of the above

✅ Correct Answer: 2

Hexadecimal representation of 11111001 is :-

1. E9
2. 99
3. F9
4. 159

✅ Correct Answer: 3

Binary representation of F9 is :-

1. 11111001
2. 11100110
3. 11001001
4. 11100110

✅ Correct Answer: 1

Binary representation of 371(octal) is :-

1. 11111001
2. 11110010
3. 11110011
4. 10111011

✅ Correct Answer: 1