C Programming | MCQs

Explanation

In 1972 by Dennis Ritchie invented the high-level language “C”?

in the Bell Laboratories of the AT & T (American Telephone & Telegraph),located in U.S.A.

Dennis Ritchie is known as the founder of c language.

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Co developer of Unix

C is a general-purpose computer programming language.

It was created in the 1970s.

By design, C's features cleanly reflect the capabilities of the targeted CPUs. 

Designed by: Dennis Ritchie

First appeared: 1972

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Explanation

Converter is not a standard module in the C programming process.

The main modules of C programming include Editor (for writing code), Compiler (for translating code), and Linker (for combining object files).

Explanation

The UNIX operating system was originally developed in assembly, but later rewritten in C to make it portable.

This marked a major milestone in OS development, allowing UNIX to run on different hardware platforms.

Explanation

clrscr() is a function used to clear the console screen in C/C++ (usually with conio.h library).

It helps to remove previous output before displaying new information on the screen.

Explanation

The getche() function in C/C++ (from the <conio.h> library) performs two actions:

1. Reads a single character from the keyboard (immediately, without waiting for Enter).
2. Echoes (displays) the character on the screen.

Explanation

In z = z + y;, since z is an int and y is long, y is converted to int (if possible) to match the type of z due to usual type conversion rules.

The result is calculated as an int, and this may cause data loss if y exceeds int range.

Explanation

In a do-while loop, the body executes first, and the condition is checked afterward, ensuring it runs at least once.

This differs from for and while loops, which check the condition before executing.

Explanation

In C, getchar() reads a single character from standard input but requires pressing "Enter" to submit the input.

The input is buffered, meaning it waits for the newline (n) before processing the character.

Explanation

A variable declared with the const keyword in C becomes read-only and its value cannot be modified after initialization.

Attempting to change a const variable will result in a compile-time error.

Explanation

"define" is a reserved keyword in C, used in preprocessor directives (e.g., #define) and cannot be used as a variable name.

Variable names like "address", "name", and "age" are valid as they follow C naming rules and aren't reserved.