C MCQ 10+

Test your knowledge with important C MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 40 + more C MCQs at Bissoy

• Which of the following header files must necessarily be included in your code, if you want to find the minimum value of unsigned short integer?
  ক

  stdio.h

  খ

  stdlib.h

  গ

  limits.h

  ঘ

  math.h
• What is the binary representation of the integer -14?
  ক

  11110

  খ

  01110

  গ

  01100

  ঘ

  11100
• Suppose we have: int a=100; (signed by default). If we want to convert this to an unsigned long integer, we can do this by making the following small change:
  ক

  int a=lu100;

  খ

  int a= 100ul;

  গ

  int a=uu100;

  ঘ

  int a=100uu;
• What is the default state of an integer in c language?
  ক

  Signed

  খ

  Unsigned

  গ

  System dependent

  ঘ

  There is no default state
• Sign qualifiers can be applied to double.
  ক

  True

  খ

  False
• In a signed integer, the sign is represented by ___________
  ক

  Least significant bit

  খ

  Most significant bit

  গ

  System dependent

  ঘ

  The mean of the most significant bit and the least significant bit
• Iteration requires more system memory than recursion.
  ক

  True

  খ

  False
• In the absence of a exit condition in a recursive function, the following error is given __________
  ক

  Compile time error

  খ

  Run time error

  গ

  Logical error

  ঘ

  No error
• The principle of stack is __________
  ক

  First in first out

  খ

  First in last out

  গ

  Last in first out

  ঘ

  Last in last out
• The data structure used to implement recursive function calls _____________
  ক

  Array

  খ

  Linked list

  গ

  Binary tree

  ঘ

  Stack
• The sequential order used to interpret a range of bytes in the memory of a computer is known as _________
  ক

  Ordering

  খ

  Sequencing

  গ

  Endianness

  ঘ

  Byte prediction
• If the data “ABCD” is to be stored in a little endian machine, it will be stored as _________
  ক

  ABCD

  খ

  DCBA

  গ

  CDAB

  ঘ

  BCDA
• File formats which have _________ as a basic unit are independent of endianness.
  ক

  1 byte

  খ

  2 bytes

  গ

  3 bytes

  ঘ

  4 bytes
• Suppose we transfer a file written on a little endian machine to a big endian machine and there is no transformation from little endian to big endian, then what happens?
  ক

  The big endian machine throws an error when it receives the file

  খ

  The big endian machine reads the file in the reverse order

  গ

  The big endian machine does not read the file

  ঘ

  The big endian machine reads the file in the normal order
• Which of the following is not an example of big endian machines?
  ক

  Power PC

  খ

  Motorola 68K

  গ

  SPARC processors

  ঘ

  ARM processors
• The standard byte order for networks is ____________
  ক

  Bit-Binary

  খ

  Little endian

  গ

  Big endian

  ঘ

  Bi-endian
• It is possible for a processor to support both little and big endian methods.
  ক

  True

  খ

  False
• A machine in which the least significant byte is stored in the smallest address is __________
  ক

  Big endian machine

  খ

  Bi-endian machine

  গ

  Binary bit machine

  ঘ

  Little endian machine
• To have GCC inline the given function regardless of the level of optimization, we must declare the function with the attribute _________________
  ক

  optimize_inline

  খ

  packed_inline

  গ

  always_inline

  ঘ

  level_inline
• Name the function whose definition can be substituted at a place where its function call is made _________
  ক

  friends function

  খ

  inline function

  গ

  volatile function

  ঘ

  external function
• Which of the following operators is used to concatenate two strings without space?
  ক

  #

  খ

  < >

  গ

  **

  ঘ

  ##
• Which of the following is not a preprocessor directive?
  ক

  #error

  খ

  #pragma

  গ

  #if

  ঘ

  #ifelse
• The purpose of the preprocessor directive #error is that ____________
  ক

  It rectifies any error present in the code

  খ

  It rectifies only the first error which occurs in the code

  গ

  It causes the preprocessor to report a fatal error

  ঘ

  It causes the preprocessor to ignore an error
• The preprocessor directive which is used to remove the definition of an identifier which was previously defined with #define?
  ক

  #ifdef

  খ

  #undef

  গ

  #ifndef

  ঘ

  #def
• The preprocessor directive which checks whether a constant expression results in a zero or non-zero value __________
  ক

  #if

  খ

  #ifdef

  গ

  #undef

  ঘ

  #ifndef
• _______________ is the preprocessor directive which is used to end the scope of #ifdef.
  ক

  #elif

  খ

  #ifndef

  গ

  #endif

  ঘ

  #if
• Which of the following is a stringizing operator?
  ক

  < >

  খ

  #

  গ

  %

  ঘ

  ##
• #pragma GCC poison should be followed by a list of identifiers that are _________
  ক

  even in number

  খ

  odd in number

  গ

  valid

  ঘ

  invalid
• The function of __attribute__((packed)); can also be performed using _________
  ক

  #pragma pack(1);

  খ

  #pragma pack(2);
• The pragma ___________________ is used to remove an identifier completely from a program.
  ক

  GNU piston

  খ

  GCC poison

  গ

  GNU poison

  ঘ

  GCC piston