Learn C

What will be the output of the C code?

• Hello World! x;

• Hello World! followed by a junk value

• Compile time error

• Hello World!

Which of the following statements is true about using comment lines in C language?

• A) Comment lines are executed by the compiler.

• B) Single-line comments start with "/" and end with "/".

• C) Multi-line comments start with "//" and continue until the end of the line.

• D) Comment lines are useful for providing information about the code and making it easier to understand.

Who is known as the father of C language?

• A) Steve Jobs

• B) Dennis Ritchie

• C) Linus Torvalds

• D) Bill Gates

Answer explanation

Dennis Ritchie is known as the father of C language. He was an American computer scientist who developed the C language at Bell Labs in the early 1970s. Steve Jobs was a co-founder of Apple Inc., Bill Gates was a co-founder of Microsoft Corporation, and Linus Torvalds is known for creating the Linux kernel. Therefore, option D is the correct answer.

Create two variables number1 with value 50 and number2 with value 780.32.

Print number1 and number2 with a space in between.

Which of the following is an example of a variable in programming?

• A) printf("Hello, World!");

• B) 3.14159

• C) "apple"

• D) x = 5;

Answer explanation

In this example, "x" is a variable that is assigned the value of 5. A variable is a named storage location in computer memory used to hold a value, such as a number, a character, or a string. Option A is incorrect because printf("Hello, World!"); is a statement that prints the text "Hello, World!" to the console. Option B is incorrect because 3.14159 is a numerical constant, not a variable. Option C is incorrect because "apple" is a string constant, not a variable. Therefore, option D is the correct answer.

What is a variable in computer programming?

• A) A type of computer hardware

• B) A programming language

• C) A named storage location in computer memory used to hold a value

• D) A type of computer virus

Which of the following is not a type of variable in programming?

• A) Integer

• B) Floating-point

• C) Character

• D) Boolean

• E) All of the above are types of variables

A single instruction or command of a program is _______________________ .

• code
• step
• game
• word

HTML stands for _ _ _

• Hyper Markup Language

• Hypertext Mark Language

• Hypertext Marks Language

• Hypertext Markup Language

An algorithm is

• a dance
• measures your heartbeat
• a list of steps to complete a task
• musical