Explore topic-wise MCQs in Engineering.

This section includes 564 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering knowledge and support exam preparation. Choose a topic below to get started.

301.

Which of the following statements are correct about the below program? #include<stdio.h> int main() { int i = 10, j = 15; if(i % 2 = j % 3) printf("IndiaBIX n"); return 0; }

A. Error: Expression syntax
B. Error: Lvalue required
C. Error: Rvalue required
D. The Code runs successfully
Answer» C. Error: Rvalue required
Discussion
302.

Is standard library a part of C language?

A. Yes
B. No
Answer» C.
Discussion
303.

The itoa function can convert an integer in decimal, octal or hexadecimal form to a string.

A. Yes
B. No
Answer» B. No
Discussion
304.

The prototypes of all standard library string functions are declared in the file string.h.

A. Yes
B. No
Answer» B. No
Discussion
305.

scanf() or atoi() function can be used to convert a string like "436" in to integer.

A. Yes
B. No
Answer» B. No
Discussion
306.

It is necessary that for the string functions to work safely the strings must be terminated with ' 0'.

A. True
B. False
Answer» B. False
Discussion
307.

FILE is a structure suitably typedef'd in "stdio.h".

A. True
B. False
Answer» B. False
Discussion
308.

ftell() returns the current position of the pointer in a file stream.

A. True
B. False
Answer» B. False
Discussion
309.

Data written into a file using fwrite() can be read back using fscanf()

A. True
B. False
Answer» C.
Discussion
310.

If the two strings are found to be unequal then strcmp returns difference between the first non-matching pair of characters.

A. True
B. False
Answer» B. False
Discussion
311.

What will be the output of the program? #include<stdio.h> #include<math.h> int main() { float i = 2.5; printf("%f, %d", floor(i), ceil(i)); return 0; }

A. 2, 3
B. 2.000000, 3
C. 2.000000, 0
D. 2, 0
Answer» D. 2, 0
Discussion
312.

What will be the output of the program? #include<stdio.h> #include<string.h> int main() { char dest[] = {97, 97, 0}; char src[] = "aaa"; int i; if((i = memcmp(dest, src, 2))==0) printf("Got it"); else printf("Missed"); return 0; }

A. Missed
B. Got it
C. Error in memcmp statement
D. None of above
Answer» C. Error in memcmp statement
Discussion
313.

What will function gcvt() do?

A. Convert vector to integer value
B. Convert floating-point number to a string
C. Convert 2D array in to 1D array.
D. Covert multi Dimensional array to 1D array
Answer» C. Convert 2D array in to 1D array.
Discussion
314.

What will be the output of the program? #include<stdio.h> 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
315.

What will be the output of the program ? #include<stdio.h> 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
316.

What will be the output of the program? #include<stdio.h> int main() { char ch; if(ch = printf("")) printf("It matters n"); else printf("It doesn't matters n"); return 0; }

A. It matters
B. It doesn't matters
C. matters
D. No output
Answer» C. matters
Discussion
317.

What will be the output of the program ? #include<stdio.h> 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
318.

What will be the output of the program? #include<stdio.h> 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
319.

What will be the output of the program? #include<stdio.h> int main() { int a=0, b=1, c=3; *((a) ? &b : &a) = a ? b : c; printf("%d, %d, %d n", a, b, c); return 0; }

A. 0, 1, 3
B. 1, 2, 3
C. 3, 1, 3
D. 1, 3, 1
Answer» D. 1, 3, 1
Discussion
320.

What will be the output of the program? #include<stdio.h> int main() { int k, num = 30; k = (num < 10) ? 100 : 200; printf("%d n", num); return 0; }

A. 200
B. 30
C. 100
D. 500
Answer» C. 100
Discussion
321.

What will be the output of the program? #include<stdio.h> int main() { int a = 300, b, c; if(a >= 400) b = 300; c = 200; printf("%d, %d, %d n", a, b, c); return 0; }

A. 300, 300, 200
B. Garbage, 300, 200
C. 300, Garbage, 200
D. 300, 300, Garbage
Answer» D. 300, 300, Garbage
Discussion
322.

What will be the output of the program? #include<stdio.h> int main() { int x = 10, y = 20; if(!(!x) && x) printf("x = %d n", x); else printf("y = %d n", y); return 0; }

A. y =20
B. x = 0
C. x = 10
D. x = 1
Answer» D. x = 1
Discussion
323.

What will be the output of the program? #include<stdio.h> int main() { unsigned int i = 65536; /* Assume 2 byte integer*/ while(i != 0) printf("%d",++i); printf(" n"); return 0; }

A. Infinite loop
B. 0 1 2 ... 65535
C. 0 1 2 ... 32767 - 32766 -32765 -1 0
D. No output
Answer» E.
Discussion
324.

Bitwise can be used to perform addition and subtraction.

A. Yes
B. No
Answer» C.
Discussion
325.

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

A. Yes
B. No
Answer» B. No
Discussion
326.

What will be the output of the program? #include<stdio.h> int main() { char j=1; while(j < 5) { printf("%d, ", j); j = j+1; } printf(" n"); return 0; }

A. 1 2 3 ... 127
B. 1 2 3 ... 255
C. 1 2 3 ... 127 128 0 1 2 3 ... infinite times
D. 1, 2, 3, 4
Answer» E.
Discussion
327.

What will be the output of the program? #include<stdio.h> int main() { int i=3; switch(i) { case 1: printf("Hello n"); case 2: printf("Hi n"); case 3: continue; default: printf("Bye n"); } return 0; }

A. Error: Misplaced continue
B. Bye
C. No output
D. Hello Hi
Answer» B. Bye
Discussion
328.

What will be the output of the program? #include<stdio.h> int main() { int x, y, z; x=y=z=1; z = ++x || ++y && ++z; printf("x=%d, y=%d, z=%d n", x, y, z); return 0; }

A. x=2, y=1, z=1
B. x=2, y=2, z=1
C. x=2, y=2, z=2
D. x=1, y=2, z=1
Answer» B. x=2, y=2, z=1
Discussion
329.

What will be the output of the program? #include<stdio.h> #include<stdlib.h> int main() { char *i = "55.555"; int result1 = 10; float result2 = 11.111; result1 = result1+atoi(i); result2 = result2+atof(i); printf("%d, %f", result1, result2); return 0; }

A. 55, 55.555
B. 66, 66.666600
C. 65, 66.666000
D. 55, 55
Answer» D. 55, 55
Discussion
330.

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

A. True
B. False
Answer» B. False
Discussion
331.

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. True
B. False
Answer» B. False
Discussion
332.

Bitwise & and | are unary operators

A. True
B. False
Answer» C.
Discussion
333.

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

A. True
B. False
Answer» B. False
Discussion
334.

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

A. ffff
B. 0fff
C. 0000
D. fff0
Answer» B. 0fff
Discussion
335.

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

A. ffff
B. 0000
C. ffdf
D. ddfd
Answer» D. ddfd
Discussion
336.

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

A. ffff
B. fff8
C. 0
D. -1
Answer» C. 0
Discussion
337.

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

A. ffff
B. 0000
C. 00ff
D. ddfd
Answer» B. 0000
Discussion
338.

What will be the output of the program? #include<stdio.h> 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
339.

Bitwise can be used to generate a random number.

A. Yes
B. No
Answer» C.
Discussion
340.

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

A. Yes
B. No
Answer» B. No
Discussion
341.

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

A. Yes
B. No
Answer» C.
Discussion
342.

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

A. Yes
B. No
Answer» B. No
Discussion
343.

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. True
B. False
Answer» C.
Discussion
344.

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

A. True
B. False
Answer» B. False
Discussion
345.

What will be the output of the program? #include<stdio.h> int main() { char str[]="C-program"; int a = 5; printf(a >10?"Ps n":"%s n", str); return 0; }

A. C-program
B. Ps
C. Error
D. None of above
Answer» B. Ps
Discussion
346.

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

A. True
B. False
Answer» C.
Discussion
347.

What will be the output of the program? #include<stdio.h> int main() { int i=0; for(; i<=5; i++); printf("%d", i); return 0; }

A. 0, 1, 2, 3, 4, 5
B. 5
C. 1, 2, 3, 4
D. 6
Answer» E.
Discussion
348.

What will be the output of the program ? #include<stdio.h> #include<string.h> int main() { static char str1[] = "dills"; static char str2[20]; static char str3[] = "Daffo"; int i; i = strcmp(strcat(str3, strcpy(str2, str1)), "Daffodills"); printf("%d n", i); return 0; }

A. 0
B. 1
C. 2
D. 4
Answer» B. 1
Discussion
349.

What will be the output of the program? #include<stdio.h> int main() { int a = 500, b = 100, c; if(!a >= 400) b = 300; c = 200; printf("b = %d c = %d n", b, c); return 0; }

A. b = 300 c = 200
B. b = 100 c = garbage
C. b = 300 c = garbage
D. b = 100 c = 200
Answer» E.
Discussion
350.

What will be the output of the program? #include<stdio.h> int main() { unsigned int i = 65535; /* Assume 2 byte integer*/ while(i++ != 0) printf("%d",++i); printf(" n"); return 0; }

A. Infinite loop
B. 0 1 2 ... 65535
C. 0 1 2 ... 32767 - 32766 -32765 -1 0
D. No output
Answer» B. 0 1 2 ... 65535
Discussion