Computer Knowledge Questions and Answers for Banks, SSC CGL, Railway and Other Competitive Exams.
Q46. What is the main function of the CPU in a computer?
Correct Answer:
Process data
Explanation:
The CPU (Central Processing Unit) processes instructions and performs calculations.
Q47. What is the file extension for an MS Word document?
Correct Answer:
.docx
Explanation:
MS Word files are saved with the .docx extension.
Q48. What does "HTTP" stand for?
Correct Answer:
Hyper Text Transfer Protocol
Explanation:
HTTP is used for transferring data between a web browser and a web server.
Q49. Which is the backbone technology behind cryptocurrencies like Bitcoin?
Correct Answer:
Blockchain
Explanation:
Blockchain is a decentralized ledger technology that records transactions in a secure and transparent manner.
Q50. Which technology is referred to as the "Internet of Things" (IoT)?
Correct Answer:
Connecting only computers
Explanation:
IoT refers to a network of interconnected devices that communicate with each other over the internet.
Q51. In SQL, which command is used to retrieve data?
Correct Answer:
SELECT
Explanation:
The SELECT command is used to fetch data from a database.
Q52. Which of the following is a relational database management system?
Correct Answer:
MySQL
Explanation:
MySQL is a relational database management system used for storing and managing data.
Q53. What does HTML stand for?
Correct Answer:
Hypertext Markup Language
Explanation:
HTML is used to create the structure of web pages.
Q54. Which language is considered the first high-level programming language?
Correct Answer:
FORTRAN
Explanation:
FORTRAN (Formula Translation) was developed in the 1950s and is one of the first high-level programming languages.
Q55. Which of the following helps protect your computer from unauthorized access?
Correct Answer:
Firewall
Explanation:
A firewall is a network security system that monitors and controls incoming and outgoing traffic based on security rules.
Q56. What is a computer virus?
Correct Answer:
A software designed to harm a computer system
Explanation:
A computer virus is malicious software that can replicate itself and damage files or systems.
Q57. Which protocol is used to send emails?
Correct Answer:
SMTP
Explanation:
SMTP stands for Simple Mail Transfer Protocol, which is used for sending emails.
Q58. What does "URL" stand for?
Correct Answer:
Uniform Resource Locator
Explanation:
A URL is the web address used to locate resources on the internet, such as a webpage.
Q59. In MS Excel, which symbol is used to start a formula?
Correct Answer:
=
Explanation:
Formulas in Excel always begin with an equals sign (=), followed by the function or calculation.
Q60. Which shortcut key is used to copy text in MS Word?
Correct Answer:
Ctrl + C
Explanation:
Ctrl + C is used for copying, Ctrl + V for pasting, and Ctrl + X for cutting text.