Question 1

Which of the following type-casting have chances for wrap around?
A)From int to float
B)From int to char
C)From char to short
D)From char to int

Accepted Answer

Type-casting from int to char can lead to wrap around because the range of char is smaller than int, and any value outside the char range will wrap around to fit within the char range.

Question 2

Which of the following typecasting is accepted by C?
A)Widening conversions
B)Narrowing conversions
C)Widening & Narrowing conversions
D)None of the mentioned

Accepted Answer

C language supports both widening and narrowing conversions, allowing for flexibility in typecasting between different data types.

Question 3

When do you need to use type-conversions?
A)The value to be stored is beyond the max limit
B)The value to be stored is in a form not supported by that data type
C)To reduce the memory in use, relevant to the value
D)All of the mentioned

Accepted Answer

Type-conversions are used in various scenarios including when the value to be stored exceeds the maximum limit of the current data type, when the value is in a form not directly supported by the current data type, and to optimize memory usage by choosing a more appropriate data type for the value in question.

Question 4

What is the scope of an external variable?
A)Whole source file in which it is defined
B)From the point of declaration to the end of the file in which it is defined
C)Any source file in a program
D)From the point of declaration to the end of the file being compiled

Accepted Answer

The answer of What is the scope of an external...

Question 5

What is the scope of a function?
A)Whole source file in which it is defined
B)From the point of declaration to the end of the file in which it is defined
C)Any source file in a program
D)From the point of declaration to the end of the file being compiled

Accepted Answer

The scope of a function is from the point of its declaration to the end of the file being compiled, meaning it is accessible within that file unless specified otherwise (e.g., with external linkage).

Question 6

In the standard library of C programming language, which of the following header file is designed for basic mathematical operations?
A)math.h
B)conio.h
C)dos.h
D)stdio.h

Accepted Answer

math.h is the header file in the C standard library that contains prototypes for functions involving mathematical operations.

Question 7

Which of the following statements should be used to obtain a remainder after dividing 3.14 by 2.1 ?
A)rem = 3.14 % 2.1;
B)rem = modf(3.14, 2.1);
C)rem = fmod(3.14, 2.1);
D)Remainder cannot be obtain in floating point division.

Accepted Answer

The fmod function is used to obtain the remainder of the division of two floating point numbers in C and C++.

Question 8

By default a real number is treated as a
A)float
B)double
C)long double
D) far double

Accepted Answer

In most programming languages, including C and C++, a real number without any suffix is treated as a double by default.

Quiz 1: Introduction to C Language

Which of the following type-casting have chances for wrap around?

Which of the following typecasting is accepted by C?

When do you need to use type-conversions?

What is the scope of an external variable?

What is the scope of a function?

In the standard library of C programming language, which of the following header file is designed for basic mathematical operations?

Which of the following statements should be used to obtain a remainder after dividing 3.14 by 2.1 ?

By default a real number is treated as a