Explore topic-wise MCQs in Testing Subject.

This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.

1.

What will be the output of the following program?void main(){ int x=300*400/300; printf("%d",x);}

A. 300
B. None of these
C. 400
D. 100
Answer» D. 100
Discussion
2.

Trace the output.void main(){ printf("%d",-5%3);}

A. 1
B. 2
C. -2
D. 2.5
Answer» D. 2.5
Discussion
3.

Trace the output.void main(){ int x=10,y=20; x=!x; y=!y; printf("x=%d , y=%d",x,y); }

A. x= -10 , y= -20;
B. x= 10 , y= 20;
C. x=0 , y=0;
D. None of the above.
Answer» D. None of the above.
Discussion
4.

Trace the output.void main(){ int x=-5,y,num=5; y=x%-4; y=(y?0:num*num); printf("%d",y); }

A. 0
B. 25
C. -25
D. None of the above.
Answer» B. 25
Discussion
5.

Which of the following operation can be applied to pointer variable?

A. Multiplication
B. Division.
C. Addition.
D. All of the above.
Answer» D. All of the above.
Discussion
6.

Trace the output.#define no 5+3int main(){int result;result=no*no*no;printf("%d",result); return 0;}

A. 512
B. 38
C. Compile time error.
D. None of the above
Answer» C. Compile time error.
Discussion
7.

Trace the output.int main(){int a=5;printf("%d %d %d", a ,a++, ++a); return 0;}

A. 5, 6, 7
B. 7, 6, 6
C. 5, 6, 6
D. None of the above.
Answer» C. 5, 6, 6
Discussion
8.

What is keywords in c?

A. keywords have predefined meanings and user can change its value at compile time.
B. keywords have predefined meanings and cannot be changed.
C. There is no predefined value of keywords. User provides these values at runtime only.
D. None of the above.
Answer» C. There is no predefined value of keywords. User provides these values at runtime only.
Discussion
9.

What would be the equivalent pointer expression for referring the array?arr[p][q][r][m]

A. * (*(*(*(arr+p)+q)+r)+m)
B. arr[0];
C. *((((arr+p)+q)+r)+m)
D. None of the above.
Answer» B. arr[0];
Discussion
10.

Trace the output.int main(){char *str="careerride";printf("%d",printf("%s",str));return 0;}

A. 10careerride
B. careerride
C. careerride10
D. Compile time error.
Answer» D. Compile time error.
Discussion
11.

The C language is.

A. A context sensitive language
B. A regular language
C. A context free language
D. None of the above.
Answer» D. None of the above.
Discussion
12.

Which of the following is correct about structure in c++?

A. structure does not support inheritance but class supports.
B. class data members are private by default while structures are public by default.
C. structure cannot be declared as abstract.
D. All of the above.
Answer» E.
Discussion
13.

Which of the following does not represent a valid storage class in c?

A. static
B. union
C. extern
D. automatic
Answer» C. extern
Discussion
14.

Trace the output.int main(){int i = 5;int *j;int **k;j=&i;k=&j;printf("%u %u %d ",k,*k,**k);return 0;}

A. some address, some address, 5
B. some address, 5, 5
C. 5 , 5 , 5
D. None of the above.
Answer» B. some address, 5, 5
Discussion
15.

Trace the outputvoid main(){ register R=20;int * P=&R;printf( %d , *P);}

A. some address.
B. 20
C. Compile time error.
D. None of the above.
Answer» D. None of the above.
Discussion
16.

A pointer in c which has not been initialized is known as

A. far pointer
B. void pointer
C. null pointer
D. wild pointer
Answer» E.
Discussion
17.

Trace the output.extern int P void main(){printf( %d , P);}

A. Error
B. 0
C. P
D. None of the above
Answer» B. 0
Discussion
18.

Which of the following statement is are correct?

A. Default initial value of static integral type variables is zero.
B. A same static variable can be declared many times but we can initialize at only one time.
C. Option A and B are correct.
D. None of the above.
Answer» D. None of the above.
Discussion
19.

C programming:main() { int x; if ( x > 4) printf( Brinda ); else if ( x > 10) printf( Karthik ); else if ( x > 21 ) printf( Pradeep ); else printf( Sandeep ); }What will be the value of x so that Karthik will be printed?

A. From 10 to 21
B. From 11 to 21
C. Grater then 10
D. None
Answer» E.
Discussion
20.

C programming: To use the function tolower(), which of the following header file should be used

A. string.h
B. conio.h
C. ctype.h
D. None of the mentioned
Answer» D. None of the mentioned
Discussion
21.

C programming: The compiler will give an error if we attempt to get the address of a variable with _________ storage class.

A. register keyword
B. extern keyword
C. static keyword
D. auto keyword
Answer» B. extern keyword
Discussion
22.

C Programming: Queue can be used to implement

A. Radix sort
B. Quick sort
C. Recursion
D. Depth first search
Answer» B. Quick sort
Discussion
23.

C programming: Which of the following is TRUE about argv?

A. It is an array of character pointers
B. It is a pointer to an array of character pointers
C. It is an array of strings
D. None of above
Answer» B. It is a pointer to an array of character pointers
Discussion
24.

C programming: Which is not a storage class?

A. Auto
B. Struct
C. Typedef
D. Static
Answer» C. Typedef
Discussion
25.

C programming: Which header file should be included to use functions like malloc() and calloc()?

A. memory.h
B. stdlib.h
C. string.h
D. dos.h
Answer» C. string.h
Discussion
26.

C programming:What function should be used to free the memory allocated by calloc() ?

A. dealloc();
B. malloc(variable_name, 0)
C. free();
D. memalloc(variable_name, 0)
Answer» D. memalloc(variable_name, 0)
Discussion
27.

What is the purpose of fflush() function? (C programming)

A. flushes all streams and specified streams.
B. flushes only specified stream.
C. flushes input/output buffer.
D. flushes file buffer.
Answer» B. flushes only specified stream.
Discussion
28.

What would be the output of the following program? (C programming) #include stdio.h main(){int a, b=5;a=b+NULL;printf( %d , a);}

A. 6
B. 5
C. 5 5
D. None
Answer» C. 5 5
Discussion
29.

How can one convert numbers to strings? (C programming)

A. Using atoi()
B. Using printf()
C. Using sprint()
D. Using nsprintf()
Answer» D. Using nsprintf()
Discussion
30.

A transparent DBMS? (Database)

A. Can not hide sensitive information from users
B. Keep its logical structure hidden from users
C. Keeps its physical structure hidden from users
D. Both B and C
Answer» D. Both B and C
Discussion
31.

The function that calls itself for its processing is known as.(C programming)

A. Inline Function
B. Nested Function
C. Overloaded Function
D. Recursive Function
Answer» E.
Discussion
32.

In c programming a function can return ___________

A. Single value
B. Double value
C. Many value
D. all of the above
Answer» B. Double value
Discussion
33.

Array index always start from (C programming)

A. 0
B. 1
C. 2
D. 3
Answer» B. 1
Discussion
34.

C: Trace the outputint main(){char c[]="CAREERRIDE";char *p=c;printf ("%s",p+p[3]-p[1]);return 0;}

A. CAREERRIDE
B. ERRIDE
C. REERRIDE
D. None of the above.
Answer» C. REERRIDE
Discussion
35.

C programming: The default parameter passing mechanism is called as

A. function call
B. call by value.
C. call by reference.
D. None of the above.
Answer» C. call by reference.
Discussion
36.

C programming:The given expressionP = Q+1 is same as

A. P=P Q 1
B. P=P Q + 1
C. P= P + Q + 1
D. None of the above.
Answer» B. P=P Q + 1
Discussion
37.

C programming : Trace the outputWhile( %d , printf( abc )){Printf( de );}

A. abcdeabcdeabcde
B. abdededede
C. Compile error.
D. None of the above.
Answer» B. abdededede
Discussion
38.

C Programming :Trace the outputint main(){int x;for(x=1;x

A. 1 2 3 4 5 6 7 8 9 10
B. 10
C. 11
D. None of the above.
Answer» D. None of the above.
Discussion
39.

Which operation can be applied to pointer variable?

A. Multiplication
B. Division.
C. Addition.
D. All of the above.
Answer» D. All of the above.
Discussion
40.

What is size of void pointer?

A. 3
B. 9
C. 10
D. Platform dependent value
Answer» E.
Discussion
41.

C Programming : Find the output#include< stdio.h>void i(int *a,int *b){a=b;*a=2;}int x=0,y=1;int main(){i(&x,&y);printf( %d%d n ,x,y);return 0; }

A. 22
B. 21
C. 02
D. 01
Answer» D. 01
Discussion
42.

What is a null pointer?

A. Null pointer is a pointer which is pointing to nothing
B. Null pointer points the base address of segment
C. Pointer which is initialized with NULL value is considered as NULL pointer.
D. All of the above
Answer» E.
Discussion
43.

C Programming : Consider the following programint n(int i){ static int a=0;if(i3){a=i;return n(i-2)+2;}return n (i-1)+a;}What is the value of f(5)?

A. 5
B. 10
C. 12
D. 18
Answer» E.
Discussion
44.

See the following C declarationstruct v{ int n;float a;}struct v * x[10];Define x as

A. An array which has the same name as a program name
B. A structure with 10 elments in it
C. An array, where each element is a pointer to a structure of type node
D. A structure of 3 fields and an array of 10 elements
Answer» D. A structure of 3 fields and an array of 10 elements
Discussion
45.

C programming : Trace the outputint main(){int a=12,b=39;printf ("%d",a&b);return 0;}

A. 468
B. 0
C. 4
D. None of the above.
Answer» D. None of the above.
Discussion
46.

C programming : Suppose that x is a one dimensional array, then choose the correct answer regarding array.

A. *(x + n) is same as &x[n]
B. *&x[n] is same as x + n
C. *(x + n) is same as x[n] +1
D. *(x + n) is same as *x[n]
Answer» B. *&x[n] is same as x + n
Discussion
47.

C programming : If you want to store dissimilar data together, then which type you will use?

A. array
B. structure
C. stack
D. None of the above.
Answer» C. stack
Discussion
48.

C programming : Trace the output.void main(){int i=2,j=2;while(i+1?--i:j++)printf("%d",i);}

A. 1
B. 2
C. ERROR
D. None of the above.
Answer» B. 2
Discussion
49.

C programming : Match the following:a. calloc( )------- i. Frees previouslyallocated space.b. free( ) ----------- ii. Modifiespreviouslyallocated space.c. malloc( ) ------- iii. Allocates spacefor array.d. realloc( ) ------- iv. Allocatesrequested size ofspace.

A. a-iii, b-i, c iv, d -ii
B. a-iii, b-ii, c i, d -iv
C. a-iii, b-iv, c i, d -ii
D. a-iv, b-ii, c iii, d -i
Answer» B. a-iii, b-ii, c i, d -iv
Discussion
50.

Identify the wrong syntax(C programming)

A. typedef struct { member declaration; } NAME; NAME V1, V2;
B. typedef struct tag{ member declaration; } NAME; NAME V1, V2;
C. typedef struct { member declaration; } NAME; NAME V1, V2;
D. typedef struct tag { member declaration; } NAME; NAME V1, V2;
Answer» E.
Discussion
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