Q. Inside the HTML document, where do you place your JavaScript code?
Inside the <head> element
In the <footer> element
Inside the <script> element
Inside the <link> element
Answer - Inside the <script> element
Q. What operator is used to assign a value to a declared variable?
Colon (:)
Equal sign (=)
Question mark (?)
Double-equal (==)
Answer - Equal sign (=)
Q. What are the six primitive data types in JavaScript?
- string, number, boolean, bigInt, symbol, undefined
- sentence, float, data, bigInt, symbol, undefined
- string, num, falsy, bigInt, symbol, undefined
- sentence, int, truthy, bigInt, symbol, undefined
Answer - `string, number, boolean, bigInt, symbol, undefined
Q. What is the difference between && and ||?
The logical operator && returns true if none of the expressions are true while the logical operator || returns true if one expression or the other returns true.
The logical operator && returns true if both expressions are true while the logical operator || returns true if one expression or the other returns true.
The logical operator && returns true if one expression is true while the logical operator || returns true if both expressions return true.
The logical operator && returns true if both expressions are true while the logical operator || returns false if one expression or the other returns true.
Answer -
The logical operator && returns true if both expressions are true while the logical operator || returns true if one expression or the other returns true.
Q. How do we declare a conditional statement in JavaScript?
for loop
while loop
if...else
difference...between
Answer -
if...else
Q. From the given array which index is the letter 'b' on? ['a', 'b', 'c', 'd']
0
3
2
1
Answer - 1
Q. How do we stop a loop from from repeating indefinitely?
- We have to explicitly end the loop with the break keyword.
- A loop will stop executing when the condition is true.
- A loop will stop executing when the condition is false.
- When we have iterated through half of the condition.
Answer - A loop will stop executing when the condition is false.
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