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Variables And Data Types In C Plus Plus MCQs

Practice Variables And Data Types In C Plus Plus MCQs for competitive exams.

Variables And Data Types In C Plus Plus MCQs

Practice questions from this topic.

Which of the following is not one of the sizes of the floating point types?

  1. A. short float
  2. B. float
  3. C. long double
  4. D. double
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Which is correct with respect to the size of the data types?

  1. A. char > int < float
  2. B. int float
  3. C. char < int < float
  4. D. char < int < double
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What will be the output of the following C++ code? #include using namespace std; int main() { void a = 10, b = 10; int c; c = a + b; cout << c; return 0; }

  1. A. 20
  2. B. compile time error
  3. C. runtime error
  4. D. 40
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Is the size of character literals different in C and C++?

  1. A. Implementation defined
  2. B. Can't say
  3. C. Yes, they are different
  4. D. No, they are not different
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Can two functions declare variables(non static) with the same name?

  1. A. No
  2. B. Yes
  3. C. Yes, but not a very efficient way to write programs
  4. D. No, it gives a runtime error
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Pick the right option. Statement 1: Global values are not initialized by the stream. Statement 2: Local values are implicitly initialised to 0.

  1. A. Statement 1 is true, Statement 2 is false
  2. B. Statement 2 is true, Statement 1 is false
  3. C. Both are false
  4. D. Both are true
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Identify the incorrect statements. int var = 10; int *ptr = &(var + 1); //statement 1 int *ptr2 = &var; //statement 2 &&var = 40; //statement 3

  1. A. Statement 1 and 2 are wrong
  2. B. Statement 2 and 3 are wrong
  3. C. Statement 1 and 3 are wrong
  4. D. Statement 1, 2 and 3 are wrong
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For what values of the expression is an if-statement block not executed?

  1. A. 0 and all negative values
  2. B. 0 and -1
  3. C. 0
  4. D. 0, all negative values, all positive values except 1
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What will be the output of the following C++ code? #include using namespace std; enum cat { temp = 7 }; int main() { int age = 14; age /= temp; cout << "If you were cat, you would be " << age << endl; return 0; }

  1. A. If you were cat, you would be 5
  2. B. If you were cat, you would be 2
  3. C. If you were cat, you would be 7
  4. D. If you were cat, you would be 9
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Which of the following belongs to the set of character types?

  1. A. char
  2. B. wchar_t
  3. C. only a
  4. D. both wchar_t and char
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What is the range of the floating point numbers?

  1. A. -3.4E+38 to +3.4E+38
  2. B. -3.4E+38 to +3.4E+34
  3. C. -3.4E+38 to +3.4E+36
  4. D. -3.4E+38 to +3.4E+32
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What will be the output of the following C++ code? #include using namespace std; int main() { int i; enum month { JAN = 1, FEB, MAR, APR, MAY, JUN, JUL, AUG, SEP, OCT, NOV, DEC }; for (i = MAR; i <= NOV; i++) cout << i; return 0; }

  1. A. 01234567891011
  2. B. 123456789101112
  3. C. 34567891011
  4. D. 123456789
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