Explore topic-wise MCQs in C Programming.

This section includes 41 Mcqs, each offering curated multiple-choice questions to sharpen your C Programming knowledge and support exam preparation. Choose a topic below to get started.

1.

If an is 2 bytes wide then, What will be the output of the program ?

A. ffff
B. 0000
C. 00ff
D. ddfd
Answer» B. 0000
Discussion
2.

Left shifting an or by 1 is always equivalent to multiplying it by 2.

A. True
B. False
Answer» B. False
Discussion
3.

In the statement . if is a signed integer with its leftmost bit set to 1 then on right shifting it the result of the statement will vary from computer to computer

A. True
B. False
Answer» B. False
Discussion
4.

In which numbering system can the binary number be easily converted to?

A. Decimal system
B. Hexadecimal system
C. Octal system
D. No need to convert
Answer» C. Octal system
Discussion
5.

Which of the following statements are correct about the program? #include int main() { unsigned int num; int i; scanf("%u", &num); for(i=0; i<16; i++) { printf("%d", (num<

A. It prints all even bits from num
B. It prints all odd bits from num
C. It prints binary equivalent num
D. Error
Answer» D. Error
Discussion
6.

Which of the following statements are correct about the program?_x000D_ #include_x000D_ _x000D_ int main()_x000D_ {_x000D_ unsigned int m[] = {0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80};_x000D_ unsigned char n, i;_x000D_ scanf("%d", &n);_x000D_ for(i=0; i<=7; i++)_x000D_ {_x000D_ if(n & m[i])_x000D_ printf("yes");_x000D_ }_x000D_ return 0;_x000D_ }

A. It will put OFF all bits that are ON in the number n
B. It will test whether the individual bits of n are ON or OFF
C. It will put ON all bits that are OFF in the number n
D. It will report compilation errors in the if statement.
Answer» C. It will put ON all bits that are OFF in the number n
Discussion
7.

If an unsigned int is 2 bytes wide then, What will be the output of the program ?_x000D_ #include_x000D_ _x000D_ int main()_x000D_ {_x000D_ unsigned int m = 32;_x000D_ printf("%x\n", ~m);_x000D_ return 0;_x000D_ }

A. ffff
B. 0000
C. ffdf
D. ddfd
Answer» D. ddfd
Discussion
8.

What will be the output of the program ?_x000D_ #include_x000D_ _x000D_ int main()_x000D_ {_x000D_ int i=4, j=8;_x000D_ printf("%d, %d, %d\n", i|j&j|i, i|j&&j|i, i^j);_x000D_ return 0;_x000D_ }

A. 4, 8, 0
B. 1, 2, 1
C. 12, 1, 12
D. 0, 0, 0
Answer» D. 0, 0, 0
Discussion
9.

What will be the output of the program ?_x000D_ #include_x000D_ _x000D_ int main()_x000D_ {_x000D_ int i=32, j=0x20, k, l, m;_x000D_ k=i|j;_x000D_ l=i&j;_x000D_ m=k^l;_x000D_ printf("%d, %d, %d, %d, %d\n", i, j, k, l, m);_x000D_ return 0;_x000D_ }

A. 0, 0, 0, 0, 0
B. 0, 32, 32, 32, 32
C. 32, 32, 32, 32, 0
D. 32, 32, 32, 32, 32
Answer» D. 32, 32, 32, 32, 32
Discussion
10.

What will be the output of the program? #include int main() { printf("%d %d\n", 32<<1, 32<<0); printf("%d %d\n", 32<<-1, 32<<-0); printf("%d %d\n", 32>>1, 32>>0); printf("%d %d\n", 32>>-1, 32>>-0); return 0; }

A. Garbage values
B. 64 320 3216 320 32
C. All zeros
D. 8 00 032 00 16
Answer» C. All zeros
Discussion
11.

What will be the output of the program? #define P printf("%d\n", -1^~0); #define M(P) int main()\ {\ P\ return 0;\ } M(P)

A. 1
B. 0
C. -1
D. 2
Answer» C. -1
Discussion
12.

What will be the output of the program ? #include int main() { int i=32, j=0x20, k, l, m; k=i|j; l=i&j; m=k^l; printf("%d, %d, %d, %d, %d\n", i, j, k, l, m); return 0; }

A. 0, 0, 0, 0, 0
B. 0, 32, 32, 32, 32
C. 32, 32, 32, 32, 0
D. 32, 32, 32, 32, 32
Answer» D. 32, 32, 32, 32, 32
Discussion
13.

What will be the output of the program? #include int main() { char c=48; int i, mask=01; for(i=1; i<=5; i++) { printf("%c", c|mask); mask = mask<<1; } return 0; }

A. 12400
B. 12480
C. 12500
D. 12556
Answer» C. 12500
Discussion
14.

Bitwise | can be used to set a bit in number.

A. Yes
B. No
Answer» B. No
Discussion
15.

What will be the output of the program ? #include int main() { int i=4, j=8; printf("%d, %d, %d\n", i|j&j|i, i|j&&j|i, i^j); return 0; }

A. 4, 8, 0
B. 1, 2, 1
C. 12, 1, 12
D. 0, 0, 0
Answer» D. 0, 0, 0
Discussion
16.

Left shifting an unsigned int or char by 1 is always equivalent to multiplying it by 2.

A. 1
B.
Answer» B.
Discussion
17.

On left shifting, the bits from the left are rotated and brought to the right and accommodated where there is empty space on the right?

A. 1
B.
Answer» C.
Discussion
18.

Bitwise can be used to perform addition and subtraction.

A. Yes
B. No
C. Yes
D. No
Answer» C. Yes
Discussion
19.

Bitwise | can be used to multiply a number by powers of 2.

A. Yes
B. No
Answer» C.
Discussion
20.

Bitwise & and | are unary operators

A. 1
B.
Answer» C.
Discussion
21.

Which of the following statements are correct about the program? #include char *fun(unsigned int num, int base); int main() { char *s; s=fun(128, 2); s=fun(128, 16); printf("%s\n",s); return 0; } char *fun(unsigned int num, int base) { static char buff[33]; char *ptr = &buff[sizeof(buff)-1]; *ptr = '\0'; do { *--ptr = "0123456789abcdef"[num %base]; num /=base; }while(num!=0); return ptr; }

A. It converts a number to a given base.
B. It converts a number to its equivalent binary.
C. It converts a number to its equivalent hexadecimal.
D. It converts a number to its equivalent octal.
Answer» B. It converts a number to its equivalent binary.
Discussion
22.

If an unsigned int is 2 bytes wide then, What will be the output of the program ? #include int main() { unsigned int a=0xffff; ~a; printf("%x\n", a); return 0; }

A. ffff
B. 0
C. 00ff
D. ddfd
Answer» B. 0
Discussion
23.

Bitwise | can be used to set multiple bits in number.

A. Yes
B. No
Answer» B. No
Discussion
24.

Which of the following statements are correct about the program? #include int main() { unsigned int num; int c=0; scanf("%u", &num); for(;num;num>>=1) { if(num & 1) c++; } printf("%d", c); return 0; }

A. It counts the number of bits that are ON (1) in the number num.
B. It counts the number of bits that are OFF (0) in the number num.
C. It sets all bits in the number num to 1
D. Error
Answer» B. It counts the number of bits that are OFF (0) in the number num.
Discussion
25.

Bitwise can be used to reverse a sign of a number.

A. Yes
B. No
Answer» C.
Discussion
26.

Assuming a integer 2-bytes, What will be the output of the program? #include int main() { printf("%x\n", -1<<3); return 0; }

A. ffff
B. fff8
C. 0 
D. -1
Answer» C. 0¬†
Discussion
27.

Bitwise & can be used to divide a number by powers of 2

A. 1
B.
C. 1
D.
Answer» C. 1
Discussion
28.

Which of the following statements are correct about the program? #include int main() { unsigned int m[] = {0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80}; unsigned char n, i; scanf("%d", &n); for(i=0; i<=7; i++) { if(n & m[i]) printf("yes"); } return 0; }

A. It will put OFF all bits that are ON in the number n
B. It will test whether the individual bits of n are ON or OFF
C. It will put ON all bits that are OFF in the number n
D. It will report compilation errors in the if statement.
Answer» C. It will put ON all bits that are OFF in the number n
Discussion
29.

What will be the output of the program? #include int main() { unsigned int res; res = (64 >>(2+1-2)) & (~(1<<2)); printf("%d\n", res); return 0; }

A. 32
B. 64
C. 0
D. 128
Answer» B. 64
Discussion
30.

If an unsigned int is 2 bytes wide then, What will be the output of the program ? #include int main() { unsigned int m = 32; printf("%x\n", ~m); return 0; }

A. ffff
B. 0
C. ffdf
D. ddfd
Answer» D. ddfd
Discussion
31.

Bitwise can be used to generate a random number.

A. Yes
B. No
Answer» C.
Discussion
32.

Bitwise & can be used to check if more than one bit in a number is on.

A. 1
B.
Answer» B.
Discussion
33.

What will be the output of the program? #include int main() { unsigned char i = 0x80; printf("%d\n", i<<1); return 0; }

A. 0
B. 256
C. 100
D. 80
Answer» C. 100
Discussion
34.

What will be the output of the program? #include int main() { printf("%d >> %d %d >> %d\n", 4 >> 1, 8 >> 1); return 0; }

A. 4 1 8 1
B. 4 >> 1 8 >> 1
C. 2 >> 4 Garbage value >> Garbage value
D. 2 4
Answer» D. 2 4
Discussion
35.

In the statement expression1 >> expression2. if expression1 is a signed integer with its leftmost bit set to 1 then on right shifting it the result of the statement will vary from computer to computer

A. 1
B.
Answer» B.
Discussion
36.

Bitwise & can be used to check if a bit in number is set or not.

A. 1
B.
Answer» B.
Discussion
37.

Assunming, integer is 2 byte, What will be the output of the program? #include int main() { printf("%x\n", -1>>1); return 0; }

A. ffff
B. 0fff
C. 0
D. fff0
Answer» B. 0fff
Discussion
38.

Bitwise & can be used in conjunction with ~ operator to turn off 1 or more bits in a number.

A. Yes
B. No
C. Yes
D. No
Answer» B. No
Discussion
39.

Which bitwise operator is suitable for checking whether a particular bit is on or off?

A. && operator
B. & operator
C. || operator
D. ! operator
Answer» C. || operator
Discussion
40.

Left shifting a number by 1 is always equivalent to multiplying it by 2.

A. 1
B.
C. 1
D.
Answer» B.
Discussion
41.

In which numbering system can the binary number 1011011111000101 be easily converted to?

A. Decimal system
B. Hexadecimal system
C. Octal system
D. No need to convert
Answer» C. Octal system
Discussion