Which keyword is used to declare a constant variable in JavaScript?
A). const
B). let
C). var
D). constant
Which statement correctly assigns the value true to a boolean variable isLogged in JavaScript?
A). let isLogged = 'true';
B). let isLogged = true;
C). let isLogged = 1;
D). let isLogged = 0;
Which data type is used to represent whole numbers in JavaScript?
A). number
B). integer
C). float
D). string
What happens if you declare a variable without initializing it in JavaScript?
A). It will throw a syntax error
B). It will assign the variable a value of undefined
C). It will automatically assign a value to the variable
D). It will assign the variable a value of null
What is the keyword used to declare variables in JavaScript?
A). let
B). variable
C). var
D). const
What will be the value of x after the following code executes: let x = '5' + 5;?
A). '55'
B). 10
C). 5
D). '10'
What will be the value of x after the following code executes: let x = 10; x += 5;?
A). 15
B). 5
C). 10
D). undefined
Which of the following is NOT a valid variable name in JavaScript?
A). _myVariable
B). 2ndVariable
C). $myVariable
D). my-Variable
What will be the output of the following code: console.log('Hello ' + 'World');?
A). Hello World
B). Hello + World
C). Hello +World
D). HelloWorld
What is the purpose of using the === operator in JavaScript?
A). Strict equality comparison
B). Loose equality comparison
C). Assignment operator
D). Addition operator