Explore topic-wise MCQs in Expressions.

This section includes 107 Mcqs, each offering curated multiple-choice questions to sharpen your Expressions knowledge and support exam preparation. Choose a topic below to get started.

51.

What is the output of this C code? int main() { int i = -5; int k = i %4; printf("%d n", k); }

A. Compile time error
B. -1
C. 1
D. None
Answer» C. 1
Discussion
52.

For the following statement find the values generated for p and q? int p = 0, q = 1; p = q++; p = ++q; p = q--; p = --q; Value of p & q are

A. 1 1
B. 0 0
C. 3 2
D. 1 2
Answer» B. 0 0
Discussion
53.

Which of the following statement is correct about the code snippet given below? #include < stdio> int main() { int a = 10, b = 2, c; a = !( c = c == c) && ++b; c += ( a + b- -); printf( %d %d %d , b, c, a); return 0; }

A. The program will print the output 1 3 0
B. The program will print the output 0 1 3
C. The program will results in expression syntax error
D. The program will print the output 0 3 1
Answer» B. The program will print the output 0 1 3
Discussion
54.

Which of the following is the better approach to do the operation i = i * 16?

A. Multiply I by 16 and keep it
B. Shift left by 4 bit
C. Add I 16 times
D. Shift right by 4 bit
Answer» C. Add I 16 times
Discussion
55.

What will be the output of the following program? #include < stdio> int main() { int num = 0, z = 3; if ( ! (num <= 0) || ++z ) printf( %d %d , ++num + z++, ++z ); else printf( %d %d , - -num + z- -, - - z); return 0; }

A. 2 1
B. 6 5
C. 4 5
D. 5 5
Answer» C. 4 5
Discussion
56.

What is the output of the following program? #include < stdio> int main() { int max =123, min = 10, *maxptr = &max, *minptr = &min; int **nptr = &minptr, **mptr = &maxptr; *maxptr = ++*mptr % **nptr; max - = ( *minptr -**nptr && *maxptr || *minptr); printf( %d %d , ++**mptr, *minptr); return 0; }

A. 4 10
B. 3 11
C. 3 10
D. 4 11
Answer» B. 3 11
Discussion
57.

What will be the output of the following program? #include < stdio> static int y = 1; int main() { static int z; printf( %d %d , y, z); return 0; }

A. Garbage value
B.
C. C.
D. D.
Answer» D. D.
Discussion
58.

What value will be stored in z if the following code is executed? main() { int x = 5; y = -10, z; int a = 4, b = 2; z = x+++++y * b/a; }

A. -2
B. 1
C. 2
Answer» D.
Discussion
59.

What will be the output of the following program? #include< stdio> void fun() { fun(); Return 0; } void fun() { auto int I = 1; register char a = D ; static int p = 0; printf( %d %d %ld , I, a, p); }

A. 1 D 0
B. 1 0 0
C. 0 D 1
D.
Answer» E.
Discussion
60.

Which of the following statement are correct? (i) The maximum value a variable can hold depends upon its storage class. (ii) By default all variables enjoy a static storage class.

A. Only I is correct
B. Only II is correct
C. Both I & II are correct
D. Both I & II are incorrect
Answer» E.
Discussion
61.

What is the output of this C code? int main() { int a = 10, b = 5, c = 3; b != !a; c = !!a; printf("%d t%d", b, c); }

A. 5 1
B. 0 3
C. 5 3
D. 1 1
Answer» B. 0 3
Discussion
62.

Result of a logical or relational expression in C is?

A. True or False
B. 0 or 1
C. 0 if expression is false and any positive number if expression is true
D. None of the mentioned
Answer» C. 0 if expression is false and any positive number if expression is true
Discussion
63.

What will be the value of d in the following program? int main() { int a = 10, b = 5, c = 5; int d; d = b + c == a; printf("%d", d); }

A. Syntax error
B. 1
C. 5
D. 10
Answer» C. 5
Discussion
64.

Does logical operators in C language are evaluated with short circuit?

A. True
B. False
C. Depends on the compiler
D. depends on the standard
Answer» B. False
Discussion
65.

What is the output of this C code? int main() { int x = -2; x = x >> 1; printf("%d n", x); }

A. 1
B. -1
C. 2 ^ 31 1 considering int to be 4 bytes
D. Either (b) or (c)
Answer» C. 2 ^ 31 1 considering int to be 4 bytes
Discussion
66.

What is the output of this C code? int main() { if (~0 == 1) printf("yes n"); else printf("no n"); }

A. Yes
B. No
C. Compile time error
D. Undefined
Answer» C. Compile time error
Discussion
67.

What is the output of this C code? int main() { int x = 2; x = x << 1> printf("%d n", x); }

A. 4
B. 1
C. Depends on the compiler
D. Depends on the endianness of the machine
Answer» B. 1
Discussion
68.

What is the output of this C code? void main() { int x = 4; int *p = &x; int *k = p++; int r = p - k; printf("%d", r); }

A. 4
B. 8
C. 1
D. Run time error
Answer» D. Run time error
Discussion
69.

What is the output of this C code? void main() { int x = 4, y, z; y = --x; z = x--; printf("%d%d%d", x, y, z); }

A. 3 2 3
B. 2 2 3
C. 3 2 2
D. 2 3 3
Answer» E.
Discussion
70.

What is the output of this C code? void main() { int a = 5, b = -7, c = 0, d; d = ++a && ++b || ++c; printf(" n%d%d%d%d", a, b, c, d); }

A. 6 -6 0 0
B. 6 -5 0 1
C. -6 -6 0 1
D. 6 -6 0 1
Answer» E.
Discussion
71.

What is the output of this C code? int main() { int a = 2; if (a >> 1) printf("%d n", a); }

A. 1
B. 2
C. No output
Answer» D.
Discussion
72.

Comment on the output of this C code? int main() { int i, n, a = 4; scanf("%d", &n); for (i = 0; i < n> a = a * 2; }

A. Logical Shift left
B. No output
C. Arithmetic Shift right
D. bitwise exclusive OR
Answer» C. Arithmetic Shift right
Discussion
73.

What is the output of this C code? int main() { int a = 10, b = 10; if (a = 5) b--; printf("%d, %d", a, b--); }

A. a = 10, b = 9
B. a = 10, b = 8
C. a = 5, b = 9
D. a = 5, b = 8
Answer» D. a = 5, b = 8
Discussion
74.

For which of the following, PI++; code will fail?

A. #define PI 3.14
B. char *PI = A ;
C. float PI = 3.14;
D. Both (A) and (B)
Answer» B. char *PI = A ;
Discussion
75.

What is the output of this C code? int main() { int i = 0; int j = i++ + i; printf("%d n", j); }

A. 1
B. 2
C. Compile time error
Answer» A. 1
Discussion
76.

What is the output of this C code? int main() { int i = 2; int j = ++i + i; printf("%d n", j); }

A. 6
B. 5
C. 4
D. Compile time error
Answer» B. 5
Discussion
77.

What is the output of this C code? int main() { int a = 1, b = 1, d = 1; printf("%d, %d, %d", ++a + ++a+a++, a++ + ++b, ++d + d++ + a++); }

A. 15, 4, 5
B. 9, 6, 9
C. 9, 3, 5
D. 6, 4, 6
Answer» B. 9, 6, 9
Discussion
78.

What is the output of this C code? int main() { int a = 1, b = 1, c; c = a++ + b; printf("%d, %d", a, b); }

A. a = 1, b = 1
B. a = 2, b = 1
C. a = 1, b = 2
D. a = 2, b = 2
Answer» C. a = 1, b = 2
Discussion
79.

What is the difference between the following 2 codes? //Program 1 int main() { int d, a = 1, b = 2; d = a++ + ++b; printf("%d %d %d", d, a, b); } //Program 2 int main() { int d, a = 1, b = 2; d = a++ + ++b; printf("%d %d %d", d, a, b); }

A. No difference as space doesn t make any difference, values of a, b, d are same in both the case
B. No difference as space doesn t make any difference, values of a, b, d are different
C. Program 1 has syntax error, program 2 is not
D. Program 2 has syntax error, program 1 is not
Answer» B. No difference as space doesn t make any difference, values of a, b, d are different
Discussion
80.

What is the output of this C code? int main() { int y = 1; if (y & (y = 2)) printf("true %d n"); else printf("false %d n"); }

A. true 2
B. false 2
C. Either option a or option b
D. true 1
Answer» D. true 1
Discussion
81.

What is the output of this C code? void main() { int x = 1, y = 0, z = 5; int a = x && y && z++; printf("%d", z); }

A. 6
B. 5
C. Varies
Answer» C. Varies
Discussion
82.

What is the output of this C code? int main() { int x = -2; if (!0 == 1) printf("yes n"); else printf("no n"); }

A. Yes
B. No
C. Run time error
D. Undefined
Answer» B. No
Discussion
83.

What is the output of this C code? int main() { int y = 0; if (1 |(y = 1)) printf("y is %d n", y); else printf("%d n", y); }

A. 1
B. Run time error
C. Undefined
Answer» B. Run time error
Discussion
84.

What is the output of this C code? void main() { int x = 1, y = 0, z = 5; int a = x && y || z++; printf("%d", z); }

A. 6
B. 5
C. Varies
Answer» B. 5
Discussion
85.

What is the output of this C code? void main() { int a = 5, b = -7, c = 0, d; d = ++a && ++b || ++c; printf(" n%d%d%d%d", a, b, c, d); }

A. 6 -6 0 0
B. 6 -5 0 1
C.
D. D.
Answer» E.
Discussion
86.

What is the output of this C code? void main() { int x = 4; int *p = &x; int *k = p++; int r = p - k; printf("%d", r); }

A. 4
B. 8
C. 1
D. Run time error
Answer» D. Run time error
Discussion
87.

What is the output of this C code? void main() { int a = -5; int k = (a++, ++a); printf("%d n", k); }

A. -4
B. -5
C. 4
D. -3
Answer» E.
Discussion
88.

What is the output of this C code? void main() { int x = 4, y, z; y = --x; z = x--; printf("%d%d%d", x, y, z); }

A. 3 2 3
B. 2 3 3
C. 3 2 2
D. 2 3 4
Answer» C. 3 2 2
Discussion
89.

What is the output of this C code? int main() { int i = 10; int *p = &i; printf("%d n", *p++); }

A. 10
B. 11
C. Garbage value
D. Address of i
Answer» B. 11
Discussion
90.

What is the output of this C code? void main() { int x = 97; int y = sizeof(x++); printf("X is %d", x); }

A. X is 97
B. X is 98
C. X is 99
D. Run time error
Answer» B. X is 98
Discussion
91.

Comment on the output of this C code? int main() { int i = 2; int i = i++ + i; printf("%d n", i); }

A. = operator is not a sequence point
B. ++ operator may return value with or without side effects
C. it can be evaluated as (i++)+i or i+(++i)
D. Both a and b
Answer» B. ++ operator may return value with or without side effects
Discussion
92.

What is the output of this C code? int main() { int i = 0; int x = i++, y = ++i; printf("%d % d n", x, y); return 0; }

A. 0, 2
B. 0, 1
C. 1, 2
D. Undefined
Answer» B. 0, 1
Discussion
93.

What is the output of this C code? int main() { int i = 1; if (i++ && (i == 1)) printf("Yes n"); else printf("No n"); }

A. Yes
B. No
C. Depends on the compiler
D. Depends on the standard
Answer» C. Depends on the compiler
Discussion
94.

Are logical operators sequence points?

A. True
B. False
C. Depends on the compiler
D. Depends on the standard
Answer» B. False
Discussion
95.

What is the final value of j in the below code? int main() { int i = 0, j = 0; if (i && (j = i + 10)) //do something ; }

A. 10
B. Depends on the compiler
C. Depends on language standard
Answer» A. 10
Discussion
96.

What is the output of this C code? int main() { int x = 1, y = 0, z = 3; x > y ? printf("%d", z) : return z; }

A. 3
B. 1
C. Compile time error
D. Run time error
Answer» D. Run time error
Discussion
97.

What is the output of this C code? void main() { int x = 1, z = 3; int y = x << 3> printf(" %d n", y); }

A. -2147483648
B. -1
C. Run time error
D. 8
Answer» E.
Discussion
98.

What is the output of this C code? void main() { int x = 0, y = 2, z = 3; int a = x & y | z; printf("%d", a); }

A. 3
B. 2
C. Run time error
Answer» B. 2
Discussion
99.

What is the output of the following program? #include< stdio> int main() { static int a = 3; printf( %d , a --); return 0; }

A. 1
B. 2
C. 3
Answer» D.
Discussion
100.

Which of the following statement are correct? (i) The value stored in the CPU register can always be accessed faster than that stored in memory. (ii) A register storage class variable will always be stored in a CPU register.

A. Only I is correct
B. Only II is correct
C. Both I & II are correct
D. Both I & II are incorrect
Answer» B. Only II is correct
Discussion