C Programming 100 Solved MCQ Question Answer Part-1

Question: 1. What would be the output of the following program?

int x=40;
main(){
int x=20;
printf("
%d",x);
}

Option A. 40

Option B. 20

Option C. Compilation Error

Option D. Garbeg Value

Question: 2. What will be output if you will compile and execute the following c code?

#include 
int main(){    
int i=320;    
char *ptr=(char *)&i;    
printf("%d",*ptr);     
return 0; 
} 

Option A. 1

Option B. 64

Option C. 320

Option D. Compiler Error

Question: 3.

What will be output if you will compile and execute the following c code?

#include 
#define x 5+2 
int main(){     
int i;     
i=x*x*x;     
printf("%d",i);      
return 0;  
} 

Option A. 27

Option B. 343

Option C. 233

Option D. Compiler Error

Question: 4.

What will be output if you will compile and execute the following c code?

#include 
int main(){     
char c=125;     
c=c+10;     
printf("%d",c);     
return 0;   
} 

 

Option A. 135

Option B. +INF

Option C. -121

Option D. -135

Question: 5. What will be output if you will compile and execute the following c code?

#include 
int main()
{     
float a=5.2;   
if(a==5.2)       
printf("Equal");    
else if(a<5.2)       
printf("Less than");    
else 
printf("Greater than");  
return 0;
} 

Option A. Less than

Option B. Equal

Option C.

Greater than

Option D. None of above

Question: 6. For 16bit compiler allowable range for integer constants is ______ ?

Option A. 3.4e38 to 3.4e38

Option B. 32767 to 32768

Option C. 32768 to 32767

Option D. 32668 to 32667

Question: 7. C programs are converted into machine language with the help of

Option A. An Editor

Option B. A compiler

Option C. An operating system

Option D. None of the above

Question: 8. A C variable cannot start with

Option A. An alphabet

Option B. A number

Option C. A special symbol other than underscore

Option D. both (b) and (c)

Question: 9. Which of the following is allowed in a C Arithmetic instruction

Option A. []

Option B. {}

Option C. ()

Option D. None of the above

Question: 10. Which of the following shows the correct hierarchy of arithmetic operations in C

Option A. / + *

Option B. * / +

Option C. + / *

Option D. * / + -

Question: 11. What is an array?

Option A. An array is a collection of variables that are of the dissimilar data type.

Option B. An array is a collection of variables that are of the same data type.

Option C. An array is not a collection of variables that are of the same data type.

Option D. None of the above.

Question: 12. What is right way to Initialization array?

Option A. int num[6] = { 2, 4, 12, 5, 45, 5 } ;

Option B. int n{} = { 2, 4, 12, 5, 45, 5 } ;

Option C. int n{6} = { 2< 4< 12 } ;

Option D. int n(6) = { 2, 4, 12, 5, 45, 5 } ;

Question: 13. An array elements are always stored in _________ memory locations.

Option A. Sequential

Option B. Random

Option C. Sequential and Random

Option D. None of the above

Question: 14. What is the right way to access value of structure variable book{ price, page }?

Option A. printf("%d%d", book.price, book.page);

Option B. printf("%d%d", price.book, page.book);

Option C. printf("%d%d"< price::book< page::book);

Option D. printf("%d%d", price>book, page>book);

Question: 15. perror( ) function used to ?

Option A. Work same as printf()

Option B. prints the error message specified by the compiler

Option C. prints the garbage value assigned by the compiler

Option D. None of the above

Question: 16. Bitwise operators can operate upon?

Option A. double and chars

Option B. floats and doubles

Option C. ints and floats

Option D. ints and chars

Question: 17. What is C Tokens?

Option A. The smallest individual units of c program

Option B. The basic element recognized by the compiler

Option C. The largest individual units of program

Option D. A & B Both

Question: 18. What is Keywords?

Option A. Keywords have some predefine meanings and these meanings can be changed.

Option B. Keywords have some unknown meanings and these meanings cannot be changed.

Option C. Keywords have some predefine meanings and these meanings cannot be changed.

Option D. None of the above

Question: 19. If the class name is X, what is the type of its “this” pointer (in a nonstatic, non-const member function)?

Option A. const X* const

Option B. X* const

Option C. X*

Option D. X&

Question: 20. Which classes allow primitive types to be accessed as objects?

Option A. Storage

Option B. Virtual

Option C. Friend

Option D. Wrapper

Question: 21. When is std::bad_alloc exception thrown?

Option A. When new operator cannot allocate memory

Option B. When alloc function fails

Option C. When type requested for new operation is considered bad<  thisexception is thrown

Option D. When delete operator cannot delete teh allocated (corrupted) object

Question: 22. Which one of the following is not a fundamental data type in C++

Option A. float

Option B. string

Option C. int

Option D. wchar_t

Question: 23. Which of the following is a valid destructor of the class name "Country"

Option A. int ~Country()

Option B. void Country()

Option C. int ~Country(Country obj)

Option D. void ~Country()

Question: 24. Which of the following correctly describes C++ language?

Option A. Statically typed language

Option B. Dynamically typed language

Option C. Both Statically and dynamically typed language

Option D. Type-less language

Question: 25. Which of the following keyword supports dynamic method resolution?

Option A. abstract

Option B. Virtual

Option C. Dynamic

Option D. Typeid

Question: 26. Which of the following is the most preferred way of throwing and handling exceptions?

Option A. Throw by value and catch by reference.

Option B. Throw by reference and catch by reference.

Option C. Throw by value and catch by value

Option D. Throw the pointer value and provide catch for teh pointer type.

Question: 27. Which of the following is not true about preprocessor directives

Option A. They begin with a hash symbol

Option B. They are processed by a preprocessor

Option C. They form an integral part of the code

Option D. They have to end with a semi colon

Question: 28. What's wrong? while( (i < 10) && (i > 24))

Option A. the logical operator && cannot be used in a test condition

Option B. the while loop is an exit-condition loop

Option C. the test condition is always true

Option D. the test condition is always false

Question: 29. A continue statement causes execution to skip to

Option A. the return 0; statement

Option B. the first statement after the loop

Option C. the statement following the continue statement

Option D. the next iteration of the loop

Question: 30. What's wrong? (x = 4 && y = 5) ? (a = 5) ; (b = 6);

Option A. the question mark should be an equal sign

Option B. the first semicolon should be a colon

Option C. there are too many variables in the statement

Option D. the conditional operator is only used with apstrings

Question: 31. What's wrong? for (int k = 2, k <=12, k++)

Option A. the increment should always be ++k

Option B. the variable must always be the letter i when using a for loop

Option C. there should be a semicolon at the end of the statement

Option D. the commas should be semicolons

Question: 32. Which of the following is not recommended in a header file?

Option A. Type definitions (typedefs)

Option B. Class definitions

Option C. Function definitions

Option D. Template definitions

Question: 33. Which of the STL containers store the elements contiguously (in adjecent memory locations)?

Option A. std::vector

Option B. std::list

Option C. std::map

Option D. std::set

Question: 34. Which of the following is not a standard exception built in C++.

Option A. std::bad_creat

Option B. std::bad_alloc

Option C. std::bad_cast

Option D. std::bad_typeid

Question: 35. What does STL stand for?

Option A. Simple Template Library

Option B. Standard Template Library

Option C. Static Type Library

Option D. Single Type-based Library

Question: 36. What is the difference between overloaded functions and overridden functions?

Option A. Overloading is a dynamic or run-time binding and Overriding is static or compile-time binding

Option B. Redefining a function in a friend class is called function overriding while Redefining a function in a derived class is called a overloaded fucntion.

Option C. Overloading is a static or compile-time binding and Overriding is dynamic or run-time binding

Option D. Redefining a function in a friend class is called function overloading while Redefining a function in a derived class is called as overridden fucnion.

Question: 37. Which one of the following is not a valid reserved keyword in C++

Option A. Explicit

Option B. Public

Option C. Implicit

Option D. Private

Question: 38. Each pass through a loop is called a/an

Option A. enumeration

Option B. iteration

Option C. culmination

Option D. pass through

Question: 39. No commas or blanks are allowed within an integer or a real constant.

Option A. True

Option B. False

Question: 40. void' is a datatype.

Option A. True

Option B. False

Question: 41. emp name' is a valid variable name.

Option A. True

Option B. False

Question: 42. unsigned' is a valid variable name.

Option A. True

Option B. False

Question: 43. Operation between an integer and float always yields a float result.

Option A. True

Option B. False

Question: 44. /* The C language.
/* is a procedural language .*/*/
The above statement is valid.

Option A. True

Option B. False

Question: 45. The default initial value of automatic storage class is 0.

Option A. True

Option B. False

Question: 46. = and = = have the same operation.

Option A. True

Option B. False

Question: 47. Character data types cannot be declared as unsigned.

Option A. True

Option B. False

Question: 48. && and & operators have the same meaning.

Option A. True

Option B. False

Question: 49. Right shifting an operand 1bit is equivalent to multiplying it by 2.

Option A. True

Option B. False

Question: 50. The same variable names of automatic type can be used in different functions without any conflict.

Option A. True

Option B. False

Question: 51. printf("%d", sizeof('2')); will print 2.

Option A. True

Option B. False

Question: 52. The expression "b = 3 ^ 2;" will evaluate b = 9.

Option A. True

Option B. False

Question: 53. The expression "int i = j = k = 0;" is invalid.

Option A. True

Option B. False

Question: 54. printf() is not a library function.

Option A. True

Option B. False

Question: 55. The expression (i + j)++ is illegal.

Option A. True

Option B. False

Question: 56. The expression 'int j = 6 + 3 % -9;' evaluates to -1.

Option A. True

Option B. False

Question: 57. p++ executes faster than p + 1.

Option A. True

Option B. False

Question: 58. static variable will not always have assigned value.

Option A. True

Option B. False

Question: 59. Variables declared as register storage type gets stored in CPU registers.

Option A. True

Option B. False

Question: 60. Single operations involving entire arrays are permitted in C.

Option A. True

Option B. False

Question: 61. The main() function can be called from any other function.

Option A. True

Option B. False

Question: 62. The main() function can call itself recursively.

Option A. True

Option B. False

Question: 63. The statement "for (i = 0, j = 2; j <= 10; j++)" is a valid statement in 'C'.

Option A. True

Option B. False

Question: 64. When a user defined function is defined in program, then it has to be called at least once from the main().

Option A. True

Option B. False

Question: 65. Left shift operator rotates the bits on the left and places them to the right.

Option A. True

Option B. False

Question: 66. A recursive function calls itself again and again.

Option A. True

Option B. False

Question: 67. Only one break can be used in one loop.

Option A. True

Option B. False

Question: 68. Every if statement can be converted into an equivalent switch statement.

Option A. True

Option B. False

Question: 69. Nested macros are allowed.

Option A. True

Option B. False

Question: 70. Expression 4**3 evaluates to 64.

Option A. True

Option B. False

Question: 71. All macro substitutions in a program are done before compilation of the program.

Option A. True

Option B. False

Question: 72. # define PI = 8;' is the correct declaration of macros.

Option A. True

Option B. False

Question: 73. An array declared as A[100][100] can hold a maximum of 100 elements.

Option A. True

Option B. False

Question: 74. The array 'char name[10] can consist of a maximum of 9 characters.

Option A. True

Option B. False

Question: 75. It is necessary to initialize the array at the time of declaration.

Option A. True

Option B. False

Question: 76. the value *(&i) is same as printing the value of address of i.

Option A. True

Option B. False

Question: 77. A pointer is an indication of the variable to be accessed next.

Option A. True

Option B. False

Question: 78. The contents of a file opened in 'r+' mode cannot be changed.

Option A. True

Option B. False

Question: 79. Union is used to hold different data at different time.

Option A. True

Option B. False

Question: 80. All elements of a structure are allocated contiguous memory locations.

Option A. True

Option B. False

Question: 81. enum helps to create user defined datatype.

Option A. True

Option B. False

Question: 82. The value of an enumerated datatype can be read using scanf() function.

Option A. True

Option B. False

Question: 83. Structures within structures cannot be created.

Option A. True

Option B. False

Question: 84. gets() and puts() are unformatted I/O functions.

Option A. True

Option B. False

Question: 85. The identifier argv[] is a pointer to an array of strings.

Option A. True

Option B. False

Question: 86. fprintf()function can be used to write into console.

Option A. True

Option B. False

Question: 87. fopen() function returns a pointer to the open file.

Option A. True

Option B. False

Question: 88. Which of the following language is predecessor to C Programming Language?

Option A. A

Option B. B

Option C. BCPL

Option D. C++

Question: 89. C programming language was developed by

Option A. Dennis Ritchie

Option B. Ken Thompson

Option C. Bill Gates

Option D. Peter Norton

Question: 90. C is a ___ language

Option A. High Level and Procedural

Option B. Low Level and OOPS

Option C. Middle Level and Procedural

Option D. Machine Level and OOPS

Question: 91. Which escape character can be used to beep from speaker in C?

Option A. \a

Option B. \b

Option C. \m

Option D.

Question: 92. Which of the following is invalid?

Option A. ''

Option B. " "

Option C. 'a'

Option D. abc'

Question: 93. A declaration float a, b; occupies ___ of memory

Option A. 1 byte

Option B. 4 bytes

Option C. 8 bytes

Option D. 16 bytes

Question: 94. The printf() function retunes which value when an error occurs?

Option A. Positive value

Option B. Zero

Option C. Negative value

Option D. None of these

Question: 95. Identify the wrong statement

Option A. putchar(65)

Option B. putchar('x')

Option C. putchar("x")

Option D. putchar('
')

Question: 96. Which header file is essential for using strcmp() function?

Option A. string.h

Option B. strings.h

Option C. text.h

Option D. strcmp.h

Question: 97. Which among the following is a unconditional control structure

Option A. do-while

Option B. if-else

Option C. goto

Option D. for

Question: 98. continue statement is used

Option A. to go to the next iteration in a loop

Option B. come out of a loop

Option C. exit and return to the main function

Option D. restarts iterations from beginning of loop

Question: 99. Which of the following is an example of compounded assignment statement?

Option A. a = 5

Option B. a += 5

Option C. a = b = c

Option D. a = b

Question: 100. In the expression - 'x + y + 3z =20'

Option A. x + y' is a keyword

Option B. 3 and 20 are constants

Option C. 3z is a constant

Option D. y is a variable and z is a constant

Answer Sheet

1	B	20 Because whenever there is a conflict between a local and a global variable, it is the local variable gets priority.
2	B	As we know size of int data type is two byte while char pointer can pointer one byte at time. Memory representation of int i=320 So char pointer ptr is pointing to only first byte as shown above figure. *ptr i.e. content of first byte is 01000000 and its decimal value is 64.
3	A	As we know #define is token pasting preprocessor it only paste the value of micro constant in the program before the actual compilation start. If you will see intermediate file you will find: test.c 1:  test.c 2: void main(){ test.c 3: int i; test.c 4: i=5+2*5+2*5+2; test.c 5: printf("%d",i);  test.c 6: } test.c 7:  You can absorb #define only pastes the 5+2 in place of x in program. So, i=5+2*5+2*5+2 =5+10+10+2 =27
4	C	As we know char data type shows cyclic properties i.e. if you will increase or decrease the char variables beyond its maximum or minimum value respectively it will repeat same value according to following cyclic order: So,  125+1= 126 125+2= 127 125+3=-128 125+4=-127 125+5=-126 125+6=-125 125+7=-124 125+8=-123 125+9=-122 125+10=-121
5	A	5.2 is double constant in c. In c size of double data is 8 byte while a is float variable. Size of float variable is 4 byte.   So double constant 5.2 is stored in memory as:   101.00 11001100 11001100 11001100 11001100 11001100 11001101   Content of variable a will store in the memory as: 101.00110 01100110 01100110  It is clear variable a is less than double constant 5.2 Since 5.2 is recurring float number so it different for float and double. Number likes 4.5, 3.25, 5.0 will store same values in float and double data type. So the answer is (A)
6	C
7	B
8	D
9	C
10	D
11	B
12	A
13	A
14	A
15	B
16	D
17	D
18	C
19	D
20	B
21	D
22	A
23	B
24	D
25	A
26	B
27	A
28	D
29	C
30	D
31	B
32	D
33	C
34	A
35	A
36	B
37	C
38	C
39	A
40	A
41	B
42	B
43	A
44	B
45	B
46	B
47	B
48	B
49	B
50	A
51	B
52	B
53	A
54	B
55	A
56	B
57	A
58	A
59	A
60	A
61	A
62	A
63	A
64	B
65	B
66	A
67	B
68	B
69	B
70	B
71	A
72	B
73	B
74	A
75	B
76	B
77	B
78	B
79	A
80	A
81	A
82	B
83	B
84	A
85	B
86	B
87	A
88	B
89	A
90	A
91	A
92	D
93	C
94	C
95	C
96	A
97	C
98	D
99	C
100	B