Free Bachelor of Computer Engineering C Language Questions and Answers

Question 1

Who is the C language's father?

Accepted Answer

Dennis Ritchie

Answer

Dennis Ritchie is widely recognized as the creator of the C programming language. He developed C at Bell Labs between 1969 and 1973, primarily for use with the Unix operating system. His work profoundly influenced the development of subsequent programming languages and operating systems.

Question 2

Which of the following is a name for a C variable that is invalid?

Accepted Answer

int $main;

Answer

In C, variable names must follow specific rules. They can contain letters, digits, and underscores, but they cannot start with a digit and cannot contain special characters like `$`. The `$` symbol is not permitted in standard C variable identifiers, making `int $main;` an invalid declaration.

Question 3

Which statement regarding variable names in C is accurate?

Accepted Answer

Variable names cannot start with a digit

Answer

In C programming, a fundamental rule for variable naming is that an identifier cannot begin with a digit. Variable names must start with either an alphabet (uppercase or lowercase) or an underscore (`_`). While they can contain digits later in the name, starting with one is strictly prohibited, ensuring clear distinction from numeric literals.

Question 4

Which C expression is legitimate?

Accepted Answer

int my_num = 100000;

Answer

In C, variable names can contain underscores and alphanumeric characters, and `my_num` is a valid identifier. Integer literals like `100000` are also valid. Options B and D contain invalid characters (` ` and `$`) in the variable name, while option C uses a comma within the numeric literal, which is not allowed in C for integer values.

Question 5

Which of the following declarations does the C language not support?

Accepted Answer

String str;

Answer

The C language does not have a built-in `String` data type with a capital 'S', unlike some other programming languages like Java or C++. In C, strings are typically handled as arrays of characters (`char[]`) or pointers to characters (`char*`). Therefore, `String str;` is not a valid declaration in standard C.

B CompE Bachelor of Computer Engineering Practice Test

B CompE Bachelor of Computer Engineering Practice Test

Free Bachelor of Computer Engineering C Language Questions and Answers