C++ Programming Quizs Question and Answers – Character Types

C++ interview questions and answers focuses on “Character Types”. One shall practice these interview questions to improve their C++ programming skills needed for various interviews competitive exams. These questions can be attempted by anyone focusing on learning C++ programming language. They can be a beginner, fresher, engineering graduate or an experienced IT professional. Our C++ interview questions come with the detailed explanation of the answers which helps in better understanding of C++ concepts.

C++ questions on “Character Types” along with answers, explanations and/or solutions:

Q 1. How many characters are specified in the ASCII scheme?
A. 24
B. 64
C. 128
D. 256

Show Answer

Answer:-C. 128

Explanation

here are 128 characters defined in the C++ ASCII list.

Q 2. Which of the following belongs to the set of character types?
A. char
B. wchar_t
C. only a
D. both wchar_t and char

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Answer:-D. both wchar_t and char

Explanation

wchar_t and char are used to represent wide character and character.

Q 3. Given the variables p, q are of char type and r, s, t are of int type. Select the right statement?

    1. t = (r * s) / (r + s);
    2. t = (p * q) / (r + s);

A. 1 is true but 2 is false
B. 1 is false and 2 is true
C. both 1 and 2 are true
D. both 1 and 2 are false

Show Answer

Answer:-C. both 1 and 2 are true

Explanation

Every character constant has an integer value. Also char belongs to the integral type hence arithmetic and logical operations can be performed on them.

Q 4. What will be the output of the following C++ code?

#include <iostream>

using namespace std;

int main()

{

char c = 74;

cout << c;

return 0;

}

A. A
B. N
C. J
D. I

Show Answer

Answer:-C. J

Explanation

The literal value for 74 is J. So it will be printing J.

Q 5. What will be the output of the following C++ code?

#include <stdio.h>

int main()

{

char a = ‘\012‘;

 

printf(“%d”, a);

return 0;

}

A. Compiler error
B. 12
C. 10
D. Empty

Show Answer

Answer:-C. 10

Explanation

The value ‘\012’ means the character with value 12 in octal, which is decimal 10.

Q 6. How do we represent a wide character of the form wchar_t?
A. L’a’
B. l’a’
C. L[a]
D. la

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Answer:-A. L’a’

Explanation

A wide character is always indicated by immediately preceding the character literal by an L.

Q 7. Is the size of character literals different in C and C++?
A. Implementation defined
B. Yes, they are different
C. Can’t say
D. No, they are not different

Show Answer

Answer:-B. Yes, they are different

Explanation

In C++, sizeof(‘a’) == sizeof(char) == 1. In C however, sizeof(‘a’) == sizeof(int).

Q 8. In C++, what is the sign of character data type by default?
A. Signed
B. Unsigned
C. Implementation dependent
D. Unsigned Implementation

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Answer:-C. Implementation dependent

Explanation

The standard does not specify if plain char is signed or unsigned. There are three distinct character types according to the standard: char, signed char and unsigned char.

Q 9. What constant defined in <climits> header returns the number of bits in a char?
A. CHAR_BIT
B. SIZE_CHAR
C. BIT_CHAR
D. CHAR_SIZE

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Answer:-A. CHAR_BIT

Explanation

CHAR_BIT is a macro constant defined in header file which expresses the number of bits in a character object in bytes.

Q 10. Suppose in a hypothetical machine, the size of char is 32 bits. What would sizeof(char) return?
A. 4
B. 1
C. Implementation dependent
D. Machine dependent

Show Answer

Answer:-B. 1

Explanation

The standard does NOT require a char to be 8-bits, but does require that sizeof(char) return 1.