Understanding Programming Basics

What is a variable in programming?

• A variable is a type of function in programming.

• A variable is a command that executes a program.

• A variable is a named storage location in memory that holds a value.

• A variable is a fixed value that cannot change.

What does the term 'identifier' refer to?

• A name used to identify a variable, function, or other entity in programming.

• A keyword that defines a programming language.

• A method to execute a function in programming.

• A type of data structure used to store values.

Which of the following is a valid variable declaration?

• var x = 5;

• let 5 = x;

• let x = 5;

• const 5 = x;

What is the purpose of scope in programming?

• To manage memory allocation in a program.

• The purpose of scope is to control the accessibility and lifetime of variables and functions in a program.

• To optimize the performance of a program.

• To define the syntax of a programming language.

Can a variable name start with a number?

• Variable names can start with a letter or a number.

• A variable name can start with a special character.

• No, a variable name cannot start with a number.

• Yes, a variable name can start with a number.

What is the data type of the variable 'int age = 25;'?

• boolean

• float

• integer

• string

What are the rules for naming identifiers?

• Identifiers can include special characters like @ and #.

• Identifiers must start with a letter or underscore, can include letters, digits, and underscores, are case-sensitive, and cannot be reserved keywords.

• Identifiers can start with a digit.

• Identifiers are not case-sensitive.

Is 'myNumber' a valid identifier?

• No, it's not valid

• Yes, but only in certain languages

• Only if it's a number

• Yes

What does it mean for identifiers to be case-sensitive?

• Identifiers are considered different if they have different cases.

• Identifiers are the same regardless of case.

• Identifiers must always be in uppercase.

• Identifiers can only contain numbers and letters.

Which of the following represents a fundamental data type?

• Character

• Double

• Array

• Object