Tag: programming languages

Questions Related to programming languages

2.What is the correct JavaScript syntax to write "Hello World"?

  1. response.write("Hello World")

  2. document.write("Hello World")

  3. ("Hello World")

  4. "Hello World"


Correct Option: B
Explanation:

To write "Hello World" in JavaScript, the correct syntax is:

B. document.write("Hello World")

Explanation:

A. response.write("Hello World"): This is not the correct syntax. The "response" object does not have a "write" method in JavaScript.

B. document.write("Hello World"): This is the correct syntax. The "document" object represents the current web page, and the "write" method is used to write content directly to the web page. In this case, it will write "Hello World" to the page.

C. ("Hello World"): This is not the correct syntax. Parentheses alone do not have any specific meaning in JavaScript.

D. "Hello World": This is a string literal and is valid syntax in JavaScript. However, it does not actually write "Hello World" to the web page. It is just a static string value that can be assigned to a variable or used in other operations.

Therefore, the correct answer is B. document.write("Hello World").

  1. for (i = 0; i <= 5; i++)

  2. for i = 1 to 5

  3. for (i <= 5; i++)

  4. for (i = 0; i <= 5)


Correct Option: A
  1. SELECT * FROM Contest WHERE ContestDate < '05/25/2006'

  2. SELECT * FROM Contest HAVING ContestDate >= '05/25/2006'

  3. SELECT * FROM Contest WHERE ContestDate >= '05/25/2006'

  4. None of the above


Correct Option: C

What is the INSERT command used for?

  1. To retrieve data.

  2. To insert data.

  3. To modify data.

  4. All the above


Correct Option: B

AI Explanation

To answer this question, let's go through each option to understand why it is correct or incorrect:

Option A) To retrieve data - This option is incorrect because the INSERT command is not used to retrieve data. The correct command for retrieving data is SELECT.

Option B) To insert data - This option is correct because the INSERT command is used to add new data into a table in a database. It allows you to specify the table and the values you want to insert.

Option C) To modify data - This option is incorrect. The INSERT command is not used to modify existing data. The correct command for modifying data is UPDATE.

Option D) All the above - This option is incorrect because the INSERT command is not used for retrieving or modifying data. Therefore, the correct answer is B) To insert data. This option is correct because the INSERT command is specifically used for adding new data into a table.

  1. checks if the table has primary key specified

  2. deletes the table

  3. deletes all rows from a table

  4. None of the above


Correct Option: C