Variables and Data Types in C++ MCQ question and answer with solution

1

What will be the output of the following C++ code?

#include <iostream>
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;
}

A) If you were cat, you would be 5 B) If you were cat, you would be 2 C) If you were cat, you would be 7 D) If you were cat, you would be 9

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Answer & Solution

Answer: Option B

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2

For what values of the expression is an if-statement block not executed?

A) 0 and all negative values B) 0 and -1 C) 0 D) 0, all negative values, all positive values except 1

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Answer & Solution

Answer: Option C

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3

Identify the incorrect statements.

int var = 10;
int *ptr = &(var + 1); //statement 1
int *ptr2 = &var; //statement 2
&&var = 40; //statement 3

A) Statement 1 and 2 are wrong B) Statement 2 and 3 are wrong C) Statement 1 and 3 are wrong D) Statement 1, 2 and 3 are wrong

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Answer & Solution

Answer: Option C

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4

Pick the right option.
Statement 1: Global values are not initialized by the stream.
Statement 2: Local values are implicitly initialised to 0.

A) Statement 1 is true, Statement 2 is false B) Statement 2 is true, Statement 1 is false C) Both are false D) Both are true

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Answer & Solution

Answer: Option C

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5

Can two functions declare variables(non static) with the same name?

A) No B) Yes C) Yes, but not a very efficient way to write programs D) No, it gives a runtime error

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Answer & Solution

Answer: Option C

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6

Is the size of character literals different in C and C++?

A) Implementation defined B) Can't say C) Yes, they are different D) No, they are not different

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Answer & Solution

Answer: Option C

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7

What will be the output of the following C++ code?

#include <iostream>
using namespace std;
int main()
{
    void a = 10, b = 10;
    int c;
    c = a + b;
    cout << c;
    return 0;
}

A) 20 B) compile time error C) runtime error D) 40

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Answer & Solution

Answer: Option B

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8

Which is correct with respect to the size of the data types?

A) char > int < float B) int < char > float C) char < int < float D) char < int < double

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Answer & Solution

Answer: Option D

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9

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

A) short float B) float C) long double D) double

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Answer & Solution

Answer: Option A

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10

. . . . . . . . have the return type void.

A) all functions B) constructors C) destructors D) none of the mentioned

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Answer & Solution

Answer: Option D

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Variables and Data Types in C++ MCQ question and answer with solution | C++ Programimg MCQs