C Programming MCQs with answers Page - 140

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Q. What does 'fgetc()' return at EOF?

  • (A) ''
  • (B) NULL
  • (C) -1
  • (D) 0

A

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Q. Which of the following will compile successfully?

Code: 
const int a;
a = 5;
  • (A) Yes
  • (B) No
  • (C) Only in C++
  • (D) Only for global vars

A

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Q. Which function moves the file pointer to a specified location?

  • (A) fseek()
  • (B) ftell()
  • (C) rewind()
  • (D) fmove()

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Q. What does fclose() return on success?

  • (A) 1
  • (B) 0
  • (C) -1
  • (D) NULL

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Q. What happens if you dereference a NULL pointer?

  • (A) Returns 0
  • (B) Segmentation fault
  • (C) Prints NULL
  • (D) Undefined result

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Q. Which keyword is used to define macros?

  • (A) macro
  • (B) #define
  • (C) define
  • (D) #macro

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Q. What is a dangling pointer?

  • (A) Pointer to a variable
  • (B) Pointer to freed memory
  • (C) Pointer to null
  • (D) Pointer not initialized

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Q. Which of the following is a correct way to define a struct?

  • (A) struct A { int x; }
  • (B) structure A { int x; }
  • (C) class A { int x; }
  • (D) define A { int x; }

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Q. Which of the following is correct about array indexing?

  • (A) a[5] = 0 is valid for array of size 5
  • (B) a[0] is always the last element
  • (C) a[-1] is valid
  • (D) a[0] is the first element

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Q. What is the result of sizeof(char)?

  • (A) 2
  • (B) 1
  • (C) 4
  • (D) Depends on OS

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