Information and Communication Technology MCQ

21. Which option can lead to an SQL injection attack?

Correct Answer: Correct answer is: (A) Insufficient user input validation.

Exam Relevance: CISSP, CompTIA Security+, OSCP

Difficulty: Moderate

Concept notes: SQL injection attacks occur when untrusted data is included in SQL statements without proper validation or sanitization.

Common Mistakes: Students often overlook the importance of input validation and may believe that other factors like the method of form submission or the use of debugging mode are more critical.

Explanations: Insufficient user input validation allows attackers to inject malicious SQL code into the database queries. This can lead to unauthorized access, data manipulation, or data theft. Other options like running a database in debugging mode, using the GET method instead of POST, or using * in a SELECT statement do not directly contribute to SQL injection vulnerabilities.

Option Analysis:

Option A: Insufficient user input validation can lead to SQL injection attacks by allowing malicious SQL code to be executed.
Option B: Running a database in debugging mode does not directly contribute to SQL injection vulnerabilities.
Option C: Using the GET method instead of POST does not prevent SQL injection attacks; the vulnerability lies in how input is handled, not the method of submission.
Option D: Using * in a SELECT statement is a query syntax issue and does not contribute to SQL injection vulnerabilities.

22. ..... is a special type of program that is embedded in the web page to generate the dynamic content.

Correct Answer: Correct answer is: (A) Applets.

Exam Relevance: Computer Science, Web Development, Programming Exams

Difficulty: Moderate

Concept notes: Applets are small programs that can be embedded in web pages to generate dynamic content.

Common Mistakes: Students may confuse applets with other types of web-based technologies like scripts or plugins.

Explanations: Applets are a special type of program that can be embedded in web pages to generate dynamic content. They are typically written in Java and can interact with the user, perform calculations, and display dynamic content on the web page. This makes them suitable for creating interactive web applications.

Option Analysis:

Option A: Correct. Applets are embedded programs that can generate dynamic content on web pages.
Option B: Incorrect. Webjackers are not a recognized term in web development and do not generate dynamic content.
Option C: Incorrect. Keyloggers are malicious software used to record keystrokes and are not related to generating dynamic content on web pages.
Option D: Incorrect. The correct answer is provided in option A.

Mnemonic: A for Applets, A for Active content.

23. Who coordinates the sequencing of events within the central processor of a computer?

Correct Answer: Correct answer is: (D) Control unit.

Exam Relevance: Computer Science, Electrical Engineering, IT Certification Exams

Difficulty: Moderate

Concept notes: The control unit is responsible for coordinating the sequencing of events within the central processor of a computer.

Common Mistakes: Students may confuse the control unit with the arithmetic logic unit (ALU), which performs arithmetic and logical operations.

Explanations: The control unit manages the operation of the computer's hardware by decoding instructions and directing the flow of data between the CPU and other components. It ensures that instructions are executed in the correct sequence and timing, making it the correct choice for coordinating events within the central processor.

Option Analysis:

Option A: The logic unit, also known as the ALU, performs logical operations but does not coordinate events.
Option B: The arithmetic unit, also part of the ALU, performs arithmetic operations but does not coordinate events.
Option C: Registers store data temporarily but do not coordinate events.
Option D: The control unit coordinates the sequencing of events within the central processor.

Mnemonic: Control Unit Coordinates (CUC)

24. If a protocol specifies that data should be sent at 100 Mbps, what is this issue?

Correct Answer: Correct answer is: (C) Timing.

Exam Relevance: Computer Networks, Data Communication, Network Protocols

Difficulty: Moderate

Concept notes: The issue of specifying data transmission speed in a protocol relates to the timing aspect of communication protocols.

Common Mistakes: Students may confuse timing with syntax or semantics, which are related to the structure and meaning of the data, respectively.

Explanations: The correct answer is timing because the specification of data transmission speed (100 Mbps) directly relates to the timing of data transmission. Timing in communication protocols refers to the synchronization and scheduling of data transmission, ensuring that data is sent and received at the correct intervals. This is distinct from syntax, which deals with the format and structure of the data, and semantics, which deals with the meaning of the data.

Option Analysis:

Option A: Syntax refers to the structure and format of the data, not the speed at which it is transmitted.
Option B: Semantics refers to the meaning of the data, not the speed at which it is transmitted.
Option C: Timing refers to the scheduling and synchronization of data transmission, which is directly related to the speed at which data is sent.
Option D: This option is incorrect as the issue clearly relates to timing.

Mnemonic: Speed = Timing

25. An airline reservation system is an example of

Correct Answer: Correct answer is: (B) Real time processing.

Exam Relevance: Operating Systems, Computer Science, Information Technology

Difficulty: Moderate

Concept notes: Real time processing involves immediate response to input, which is essential for systems that require instant updates and decisions, such as an airline reservation system.

Common Mistakes: Students may confuse real time processing with interactive processing, which involves user interaction but not necessarily immediate response.

Explanations: An airline reservation system requires immediate updates and responses to ensure accurate and up-to-date information about flight availability and bookings. Real time processing ensures that the system can handle multiple transactions simultaneously and provide instant feedback, which is critical for operational efficiency and customer satisfaction.

Option Analysis:

Option A: Batch processing involves processing data in batches at specific times, which is not suitable for systems requiring immediate responses.
Option B: Real time processing is the correct choice as it ensures immediate updates and responses, which is essential for an airline reservation system.
Option C: Interactive processing involves user interaction but does not necessarily guarantee immediate response, making it less suitable for real-time critical systems.
Option D: Distributed processing involves multiple computers working together, but it does not specifically address the need for immediate response.

Mnemonic: Real Time: Reservation, Immediate Transactions

26. When working in Google Drive or One Drive, what command allows you to make a copy of document and store it locally on your computer?

Correct Answer: Correct answer is: (B) Download.

Exam Relevance: Google Drive Certification, Microsoft Office Specialist

Difficulty: Easy

Concept notes: The "Download" option allows users to save a copy of a document from cloud storage services like Google Drive or OneDrive to their local computer.

Common Mistakes: Students may confuse "Download" with "Publish on the Web," which makes the document accessible online rather than saving it locally.

Explanations: The "Download" command is the correct choice because it allows users to create a local copy of a document stored in cloud services such as Google Drive or OneDrive. This action saves the document to the user's computer, making it accessible offline and allowing for further modifications or backups.

Option Analysis:

Option A: "Publish on the Web" makes the document accessible online but does not save it locally.
Option B: "Download" saves a copy of the document to the user's local computer.
Option C: "E-Mail as Attachment" sends the document as an attachment but does not save it locally.
Option D: "E-Mail Collaborators" sends the document to collaborators but does not save it locally.

Mnemonic: D for Download, D for Desktop.

27. Software, such as Explorer and Firefo, x are referred to as.....

Correct Answer: Correct answer is: (C) Browsers.

Exam Relevance: SAT, ACT, AP Computer Science Principles

Difficulty: Easy

Concept notes: Browsers are software applications used to access and navigate the internet.

Common Mistakes: Students may confuse browsers with other types of software, such as systems software or utility software.

Explanations: Explorer and Firefox are examples of web browsers, which are software applications designed to retrieve and display content from the internet. They allow users to navigate and interact with web pages, making them browsers.

Option Analysis:

Option A: Systems software is incorrect because it refers to software that manages computer hardware and provides a platform for other software to run on, such as operating systems.
Option B: Utility software is incorrect because it refers to software designed to help users perform specific tasks, such as disk cleanup or antivirus protection.
Option C: Browsers are correct because they are software applications used to access and navigate the internet.
Option D: Internet tools is a broad term that could include browsers, but it is not as specific as the term "browsers" for software like Explorer and Firefox.

28. Which is used to create a soft break instead of a new paragraph?

Correct Answer: Correct answer is: (A) Shift + Enter.

Exam Relevance: Microsoft Office Certification, Google Docs Certification

Difficulty: Easy

Concept notes: In text editors and word processors, a soft break is used to create a line break without starting a new paragraph.

Common Mistakes: Students may confuse a soft break with a hard return, which is created by pressing the Enter key alone and starts a new paragraph.

Explanations: The combination Shift + Enter is used to create a soft break, which allows text to continue on the next line without creating a new paragraph. This is useful for formatting text where a line break is needed but the paragraph structure should remain intact.

Option Analysis:

Option A: Correct. Shift + Enter creates a soft break.
Option B: Incorrect. Shift + Alt does not create a soft break.
Option C: Incorrect. Shift + AltGr does not create a soft break.
Option D: Incorrect. Shift + F6 does not create a soft break.

29. Which of the following statements is true of directory paths?

Correct Answer: Correct answer is: (B) They are linear representations of a hierarchical file directory.

Exam Relevance: CS101, Operating Systems, Data Structures

Difficulty: Moderate

Concept notes: Directory paths represent the structure of a file system, which is inherently hierarchical. However, the path itself is a linear string that shows the sequence of directories from the root to the target file or directory.

Common Mistakes: Students may confuse directory paths with the physical storage layout on a hard disk, which is not necessarily linear or hierarchical.

Explanations: Directory paths are linear strings that represent the hierarchical structure of a file system. They show the sequence of directories from the root to the target file or directory, reflecting the hierarchical nature of the file system. This linear representation allows for easy navigation and identification of file locations within the hierarchical structure.

Option Analysis:

Option A: Directory paths do not reflect the physical storage layout on a hard disk, which is not necessarily linear or hierarchical.
Option B: This is correct. Directory paths are linear strings that represent the hierarchical structure of a file system.
Option C: Directory paths can vary between different operating systems, such as Windows and Unix-based systems.
Option D: This is incorrect because Option B is true.

30. DOS was introduced by

Correct Answer: Correct answer is: (A) IBM.

Exam Relevance: AP Computer Science Principles, High School Computer Science Exams

Difficulty: Easy

Concept notes: DOS, or Disk Operating System, was introduced by IBM in 1981 as part of their first personal computer, the IBM PC.

Common Mistakes: Students may confuse DOS with other operating systems or think it was developed by Microsoft, as Microsoft provided the software for IBM.

Explanations: IBM introduced DOS in 1981 as a key component of their IBM PC. Although Microsoft developed the software, IBM was the company that introduced and marketed DOS as part of their personal computer system.

Option Analysis:

Option A: Correct. IBM introduced DOS in 1981.
Option B: Incorrect. Xerox is not associated with the introduction of DOS.
Option C: Incorrect. Microsoft developed the software but IBM introduced DOS.
Option D: Incorrect. Bell Labs is not associated with the introduction of DOS.

Mnemonic: IBM DOS, IBM's Disk Operating System

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3 thoughts on “Information and Communication Technology MCQ - Set 3”

Peter Ross April 8, 2020

The MCQ is quite entertaining and will help in increasing knowledge also.
Reyaz Ahmad khan December 26, 2020

plz help me in regard with current Affairs
Eshita Nandpal April 11, 2021

Plz give make a part of unit wise

3 thoughts on “Information and Communication Technology MCQ - Set 3”

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