HP Computer Practice Set 22 | Interactive MCQ Mock Test

1. If you run SELECT COUNT(salary) FROM employees and some salary values are NULL, what does the query return?

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A. It returns the total number of rows including those with NULL B. It returns zero if any value is NULL C. It produces an error because of NULL values D. It returns the count of rows with non-NULL salary values

2. A database administrator is working in MySQL and needs to view all available databases present on the server. Understanding the correct command is essential for managing database environments. Which SQL statement correctly displays all databases in MySQL?

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A. LIST DATABASES; B. DISPLAY DATABASES; C. SHOW DATABASES; D. VIEW ALL DATABASES;

3. A database administrator is working in MySQL and needs to view all available databases present on the server. Understanding the correct command is essential for managing database environments. Which SQL statement correctly displays all databases in MySQL?

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A. LIST DATABASES; B. DISPLAY DATABASES; C. SHOW DATABASES; D. VIEW ALL DATABASES;

4. Which SQL command is used to permanently delete a database in MySQL?

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A. DROP DATABASE B. REMOVE DATABASE C. ERASE DATABASE D. DELETE DATABASE

5. Which SQL command is used to permanently delete a database in MySQL?

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A. DROP DATABASE B. REMOVE DATABASE C. ERASE DATABASE D. DELETE DATABASE

6. In which situation would the DBMS disadvantage of system failure have the most severe consequences for an organization?

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A. When daily backups are scheduled and maintained B. When daily operations rely on DBMS without adequate backups C. When partial data is stored outside DBMS D. When DBMS is only used for non-essential reports

7. In which situation would the DBMS disadvantage of system failure have the most severe consequences for an organization?

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A. When daily backups are scheduled and maintained B. When daily operations rely on DBMS without adequate backups C. When partial data is stored outside DBMS D. When DBMS is only used for non-essential reports

8. Which attribute is important for specifying the destination address of a hyperlink in HTML?

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A. align B. href C. font D. src

9. Which attribute is important for specifying the destination address of a hyperlink in HTML?

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A. align B. href C. font D. src

10. If a developer wants to highlight text for reference in HTML, which tag should be used?

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A. del B. sup C. mark D. u

11. If a developer wants to highlight text for reference in HTML, which tag should be used?

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A. del B. sup C. mark D. u

12. Which of the following can a PHP variable name start with?

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A. A digit or a special character B. A space C. A letter or an underscore D. A hyphen

13. Which of the following can a PHP variable name start with?

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A. A digit or a special character B. A space C. A letter or an underscore D. A hyphen

14. Which attribute in the form tag of HTML determines the server endpoint to which form data will be submitted?

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A. The enctype attribute B. The method attribute C. The action attribute D. The autocomplete attribute

15. Which attribute in the form tag of HTML determines the server endpoint to which form data will be submitted?

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A. The enctype attribute B. The method attribute C. The action attribute D. The autocomplete attribute

16. Why is the doctype declaration included at the beginning of an HTML file?

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A. To style the web page B. To add visible text C. To specify the HTML version for the browser D. To create a navigation link

17. Why is the doctype declaration included at the beginning of an HTML file?

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A. To style the web page B. To add visible text C. To specify the HTML version for the browser D. To create a navigation link

18. In XAMPP, why is Apache often chosen as the web server to run PHP applications?

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A. It only supports serving static files B. It is highly compatible with PHP and easy to configure C. It is primarily used for high-traffic websites D. It provides exclusive features for Windows

19. In XAMPP, why is Apache often chosen as the web server to run PHP applications?

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A. It only supports serving static files B. It is highly compatible with PHP and easy to configure C. It is primarily used for high-traffic websites D. It provides exclusive features for Windows

Himachal Pradesh Computer - Practice Mock Test Set 22

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