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.

1.

For which of the following situation should the register storage class be used?

A. For local variable in a function
B.
C. C.
D. D.
Answer» C. C.
Discussion
2.

What will be the output of the following code? #include< stdio> int main() { extern int a; static char j = E ; printf( %c %d , ++j, ++a); return 0; }

A. E 2
B. F 1
C. F Garbage
D. F 0
Answer» C. F Garbage
Discussion
3.

Where will the space be allocated for an automatic storage class variable?

A. In CPU register
B. In memory as well as in CPU register
C. In memory
D. On disk
Answer» D. On disk
Discussion
4.

What will be the output of the following program? #include< stdio> int main() { register int I = 2; static char ch = A ; auto float j; int k; k = ++ch && I; k = ++ch; j = i-- + ++k * 2; printf( %d %f , k , j); return 0; }

A. B 3
B. 65 138.000000
C. 68 138.000000
D. A 138
Answer» D. A 138
Discussion
5.

What will be the output of the following program? #include< stdio> int main() { static unsigned int a = 23; register unsigned char c = R ; auto long unsigned q = 345L; static long signed p = 345L; printf( a = %u c = %c , a ,c); printf( nq = %ld p = %ld , q, p); return 0; }

A. a=23 c=R q = 345 p = 345
B. A=23 c=R 0 0
C. Garbage value
D. A=23 c=R q = 345 p = 345
Answer» B. A=23 c=R 0 0
Discussion
6.

In case of a conflict between the names of a local and global variable what happens?

A. The global variable is given a priority.
B. The local variable is given a priority.
C. Which one will get a priority depends upon which one is defined first.
D. The compiler reports an error.
Answer» C. Which one will get a priority depends upon which one is defined first.
Discussion
7.

What will be the output of the following code? static int I = 5; main() { int sum = 0 do { sum + = (1/i); }while(0 < I> printf( sum of the series is %d , sum); }

A. It will print the sum of the series 1/5+1/4+ +1/1.
B. It will produce a compilation error.
C. It will produce a run time error.
D. None
Answer» D. None
Discussion
8.

What is the value of x after executing the following statement? int x = 011 | 0x10;

A. 13
B. 19
C. 25
D. 27
Answer» D. 27
Discussion
9.

Which of the following statement is correct about the code snippet given below? #include < stdio> int main() { int n = 12, k; printf( %d , (k = sizeof( n + 12.0))++); return 0; }

A. The code will print 17
B. The code will print 5
C. The code will result compile time error
D. The code will print 4
Answer» D. The code will print 4
Discussion
10.

Expression x % y is equivalent to____?

A. (x (x/y))
B. (x (x/y) * y)
C. (y (x/y))
D. (y (x/y) * y)
Answer» C. (y (x/y))
Discussion
11.

What is the correct and fully portable way to obtain the most significant byte of an unsigned integer x?

A. x & 0xFF00
B. x > > 24
C. x > > ( CHAR_BIT * (sizeof(int) - 3))
D. x > > ( CHAR_BIT * (sizeof(int) - 1))
Answer» E.
Discussion
12.

What is the value of X in the sample code given below? double X; X = ( 2 + 3) * 2 + 3;

A. 10
B. 13
C. 25
D. 38
Answer» C. 25
Discussion
13.

Which is executed quickly?

A. ++p
B. P++
C. Both
D. P+1
Answer» D. P+1
Discussion
14.

What is the output of this C code? int main() { if (7 & 8) printf("Honesty"); if ((~7 & 0x000f) == 8) printf("is the best policy n"); }

A. Honesty is the best policy
B. Honesty
C. is the best policy
D. No output
Answer» D. No output
Discussion
15.

Which of the following statement is correct about the code snippet given below? #include < stdio> int main() { float z = 12.35, c = 10; if( ++z -z) c += z; else c - = z; printf( %f %f , z, c); return 0; }

A. The program will result in compile time error
B. The program will print 12.35 22.35
C. The program will print 13.35 22.35
D. The program will print 1.35 11.35
Answer» B. The program will print 12.35 22.35
Discussion
16.

What is the output of this C code? int main() { unsigned int a = 10; a = ~a; printf("%d n", a); }

A. -9
B. -10
C. -11
D. 10
Answer» D. 10
Discussion
17.

What is the output of this C code? int main() { int c = 2 ^ 3; printf("%d n", c); }

A. 1
B. 8
C. 9
Answer» B. 8
Discussion
18.

Which of the following is an invalid assignment operator?

A. a %= 10;
B. a /= 10;
C. a |= 10;
D. None of the mentioned
Answer» E.
Discussion
19.

What is the output of this C code? int main() { int a = 4, n, i, result = 0; scanf("%d", n); for (i = 0;i < n> result += a; }

A. Addition of a and n.
B. Subtraction of a and n.
C. Multiplication of a and n.
D. Division of a and n.
Answer» D. Division of a and n.
Discussion
20.

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

A. 1 1
B. 1 2
C. 2 1
D. 2 2
Answer» D. 2 2
Discussion
21.

for c = 2, value of c after c <<= 1;

A. c = 1;
B. c = 2;
C. c = 3;
D. c = 4;
Answer» E.
Discussion
22.

Operation a = a * b + a can also be written as:

A. a *= b + 1;
B. (c = a * b)!=(a = c + a);
C. a = (b + 1)* a;
D. All of the mentioned
Answer» E.
Discussion
23.

What is the value of the below assignment expression (x = foo())!= 1 considering foo() returns 2

A. 2
B. true
C. 1
Answer» B. true
Discussion
24.

What is the type of the below assignment expression if x is of type float, y is of type int? y = x + y;

A. int
B. float
C. double
D. There is no type for an assignment expression
Answer» B. float
Discussion
25.

What is the output of this C code? int main() { int x = 2, y = 2; x /= x / y; printf("%d n", x); return 0; }

A. 2
B. 1
C. 0.5
D. Undefined behaviour
Answer» B. 1
Discussion
26.

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

A. Compile time error
B. 1
C. Undefined behaviour
Answer» B. 1
Discussion
27.

What is the output of this C code? int main() { int x = 2, y = 1; x *= x + y; printf("%d n", x); return 0; }

A. 5
B. 6
C. Undefined behaviour
D. Compile time error
Answer» E.
Discussion
28.

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

A. 6
B. Junk value
C. Compile time error
D. 7
Answer» D. 7
Discussion
29.

What is the output of this C code? void main() { int k = 8; int x = 0 == 1 && k++; printf("%d%d n", x, k); }

A. 0 9
B. 0 8
C. 1 9
D. 1 8
Answer» C. 1 9
Discussion
30.

What is the output of this C code void main() { unsigned int x = -5; printf("%d", x); }

A. Run time error
B. Varies
C. -5
D. 5
Answer» D. 5
Discussion
31.

What is the output of this C code? void main() { 1 < 2> }

A. returns 1
B. returns 2
C. varies
D. Compile time error
Answer» E.
Discussion
32.

What is the output of this C code? void main() { int x = 0; if (x = 0) printf("Its zero n"); else printf("Its not zero n"); }

A. Its not zero
B. Its zero
C. Run time error
D. None
Answer» B. Its zero
Discussion
33.

What is the output of this C code? int main() { int a = 20; double b = 15.6; int c; c = a + b; printf("%d", c); }

A. 35
B. 36
C. 35.6
D. 30
Answer» B. 36
Discussion
34.

What is the output of this C code? int main() { int a = 20, b = 15, c = 5; int d; d = a == (b + c); printf("%d", d); }

A. 1
B. 40
C. 10
D. 5
Answer» B. 40
Discussion
35.

Which of the following is not a compound assignment operator?

A. /=
B. +=
C. %=
D. ==
Answer» E.
Discussion
36.

Which of the following statement is correct about the code snippet given below? num = 5; printf( %d , ++num++ );

A. The code will print 5
B. The code will print 6
C. The code will result in L value required
D. The code will result in R value required
Answer» D. The code will result in R value required
Discussion
37.

What will be the output of the following code snippet? Y = 5; if (! Y > 10) X = Y + 3; else X = Y + 10; printf( X = %d Y = %d , X, Y);

A. The program will print X = 15 Y = 5
B. The program will print X = 15 Y = 0
C. The program will print X = 8 Y = 5
D. The program will print X = 3 Y = 0
Answer» B. The program will print X = 15 Y = 0
Discussion
38.

Relational operators cannot be used on:

A. structure
B. long
C. strings
D. float
Answer» B. long
Discussion
39.

What is the output of this C code? void main() { int y = 3; int x = 7 % 4 * 3 / 2; printf("Value of x is %d", x); }

A. Value of x is 1
B. Value of x is 2
C. Value of x is 3
D. Compile time error
Answer» B. Value of x is 2
Discussion
40.

What is the output of this C code? int main() { int a = 10; if (a == a--) printf("TRUE 1 t"); a = 10; if (a == --a) printf("TRUE 2 t"); }

A. TRUE 1
B. TRUE 2
C. TRUE 1 TRUE 2
D. No output
Answer» D. No output
Discussion
41.

Which among the following is NOT a logical or relational operator?

A. !=
B.
C. C.
D. D.
Answer» E.
Discussion
42.

What is the value of the following expression? i = 1; i = ( I< <= 1 % 2)

A. 2
B. 1
C. Syntax error
Answer» B. 1
Discussion
43.

Which of the following data type will throw an error on modulus operation(%)?

A. char
B. short
C. float
D. int
Answer» D. int
Discussion
44.

Which of the following is not an arithmetic operation?

A. a *= 20;
B. a /= 30;
C. a %= 40;
D. a != 50;
Answer» E.
Discussion
45.

The precedence of arithmetic operators is (from highest to lowest)?

A. %, *, /, +, -
B. %, +, /, *, -
C. +, -, %, *, /
D. %, +, -, *, /
Answer» B. %, +, /, *, -
Discussion
46.

What is the value of x in this C code? void main() { int x = 4 *5 / 2 + 9; }

A. 6.75
B. 1.85
C. 19
D. 3
Answer» D. 3
Discussion
47.

What is the output of this C code? void main() { int x = 4.3 % 2; printf("Value of x is %d", x); }

A. Value of x is 1.3
B. Value of x is 2
C. Value of x is 0.3
D. Compile time error
Answer» E.
Discussion
48.

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

A. Value of x is 16
B. Value of x is 21
C. Value of x is 15
D. Undefined behaviour
Answer» E.
Discussion
49.

What is the output of this C code? int main() { int i = 5; int l = i / -4; int k = i % -4; printf("%d %d n", l, k); return 0; }

A. Compile time error
B. -1 1
C. 1 -1
D. Run time error
Answer» C. 1 -1
Discussion
50.

What is the output of this C code? int main() { int i = 7; i = i / 4; printf("%d n", i); return 0; }

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