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Questions and Answers
Which of the following is NOT a valid data type in C++?
Which of the following is NOT a valid data type in C++?
- int
- float*
- string (correct)
- char*
Which of the following is a correct way to dynamically allocate memory for an integer in C++?
Which of the following is a correct way to dynamically allocate memory for an integer in C++?
- int *num = new int(5);
- int *num = new int;
- int *num = new int(); (correct)
- int *num = new int[5];
What is the output of the following code snippet: 'cout << (5 > 3 ? 10 : 5);'?
What is the output of the following code snippet: 'cout << (5 > 3 ? 10 : 5);'?
- 5
- 10 (correct)
- 3
- Error
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Study Notes
C++ Data Types
- There are certain data types that are not valid in C++.
Dynamic Memory Allocation in C++
- To dynamically allocate memory for an integer in C++, the correct way is to use
new int.
Conditional Operator in C++
- The conditional operator
? :is used to evaluate an expression and return one of two values. - The syntax is
condition ? value_if_true : value_if_false. - In the given code snippet,
cout << (5 > 3 ? 10 : 5);the output will be10because5 > 3is true.
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