Lpi Linux Professional Institute Web Development Essentials Exam 030

QUESTION NO: 1
In SQL, what is the function of the LIMIT clause?

A. To group rows that have the same values in specified columns B. To restrict the number of rows returned by a query C. To specify the join conditions between tables D. To sort the result set in ascending or descending order

Correct Answer: B

QUESTION NO: 2
Which of these statements about SQL is true? (Choose two)

A. SQL can insert, update, or delete records in a database. B. SQL is a programming language primarily used for creating websites. C. SQL can query a database and retrieve information stored in it. D. SQL is case-sensitive when it comes to commands and table names.

Correct Answer: A,C

QUESTION NO: 3
In HTML, what is the purpose of the alt attribute in an <img> tag?

A. To specify a secondary image B. To apply styles to the image C. To provide a text alternative for the image D. To change the image source

Correct Answer: C

QUESTION NO: 4
Which of the following is a best practice to prevent SQL injection in NodeJS?

A. Storing database credentials in the code B. Employing prepared statements or parameterized queries C. Concatenating user inputs directly into SQL queries D. Using regular expressions to sanitize input

Correct Answer: B

QUESTION NO: 5
Which HTTP status codes indicate success and client error? (Choose two)

A. 404 B. 200 C. 302 D. 500

Correct Answer: A,B

QUESTION NO: 6
In CSS, what is the difference between the margin and padding properties?

A. margin controls the space outside an element, while padding controls the space inside. B. padding is used for text alignment, whereas margin is used for element positioning. C. margin and padding have no differences. D. margin controls the space inside an element, while padding controls the space outside.

Correct Answer: A

QUESTION NO: 7
To update data in a table, which SQL command should be used?

A. ALTER B. UPDATE C. MODIFY D. CHANGE

Correct Answer: B

QUESTION NO: 8
What is the fundamental difference between relational and non-relational (NoSQL) databases?

A. Relational databases are only used in web development B. Non-relational databases do not use SQL for querying C. Non-relational databases are not capable of storing large amounts of data D. Relational databases are based on table structures, while non-relational databases are not

Correct Answer: D

QUESTION NO: 9
What are essential features of source code editors and Integrated Development Environments (IDEs)? (Choose two)

A. Ability to compile and execute code B. Network monitoring for security analysis C. Built-in web browser for testing web applications D. Syntax highlighting and code completion

Correct Answer: A,D

Lpi Linux Professional Institute Web Development Essentials Exam 030 - 030-100 Exam Questions