Information and Communication Technology MCQ

681. Which of the following is TRUE regarding lossless and lossy compressions?

Correct Answer: Correct answer is: (C) You can completely reconstruct lossless but not lossy compression.

Exam Relevance: Computer Science, Information Technology, Digital Media

Difficulty: Moderate

Concept notes: Lossless compression allows for the original data to be reconstructed exactly, while lossy compression results in some data loss that cannot be fully recovered.

Common Mistakes: Students may confuse the terms lossless and lossy, thinking that lossy compression can also reconstruct the original data perfectly.

Explanations: Lossless compression algorithms are designed to compress data in a way that allows the original data to be reconstructed exactly. This is achieved by using algorithms that do not discard any information during the compression process. On the other hand, lossy compression algorithms discard some data to achieve higher compression ratios, which means the original data cannot be reconstructed perfectly. Therefore, the statement that you can completely reconstruct lossless but not lossy compression is true.

Option Analysis:

Option A: This is incorrect because .jpg files use lossy compression, not lossless.
Option B: This is incorrect because lossless compression does not use inexact approximations; it preserves all original data.
Option C: This is correct because lossless compression allows for the original data to be reconstructed exactly, while lossy compression does not.
Option D: This is incorrect because lossy compression cannot completely reconstruct the original data, while lossless compression can.

Mnemonic: Lose Less, Lose More

682. Which term is defined as converting data into information?

Correct Answer: Correct answer is: (D) Processing.

Exam Relevance: AP Computer Science, IB Computer Science, SAT Subject Test in Computer Science

Difficulty: Easy

Concept notes: Processing is the term used to describe the conversion of raw data into meaningful information.

Common Mistakes: Students may confuse processing with input or output, which are different stages in the data handling process.

Explanations: Processing involves the transformation of raw data into useful information. This is a fundamental concept in information technology and computer science. Data, in its raw form, is not useful until it is processed to provide insights or actionable information.

Option Analysis:

Option A: Data is the raw facts and figures before processing.
Option B: Input is the data that is fed into a system for processing.
Option C: Output is the result produced after processing.
Option D: Processing is the correct term for converting data into information.

Mnemonic: Data to Info, Process it So

683. A ..... computer is battery operated and portable.

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

Exam Relevance: SAT, ACT, AP Computer Science Principles

Difficulty: Easy

Concept notes: A laptop computer is battery-operated and portable, making it suitable for use in various locations.

Common Mistakes: Students may confuse a laptop with a desktop computer, which is not portable and typically requires a power outlet.

Explanations: A laptop is designed to be portable and can operate on battery power, making it suitable for use in different locations. Desktop computers, on the other hand, are not portable and require a power outlet to function.

Option Analysis:

Option A: A desktop computer is not portable and requires a power outlet to function.
Option B: A laptop computer is battery-operated and portable.
Option C: A tower is a component of a desktop computer and is not portable.
Option D: A server is typically stationary and not designed for portability.

Mnemonic: Laptop = Light and Portable

684. Shortcut key for Change case is.....?

Correct Answer: Correct answer is: (A) Shift+F3.

Exam Relevance: GRE, GMAT, CAT, Competitive Typing Exams

Difficulty: Very Easy

Concept notes: The Shift+F3 key combination is used to change the case of selected text in many word processing applications.

Common Mistakes: Students may confuse this with other keyboard shortcuts that involve the F3 key, such as Ctrl+F3 or Ctrl+Shift+F3, which have different functions.

Explanations: The Shift+F3 key combination is specifically designed to toggle the case of selected text between various formats, such as all uppercase, all lowercase, and sentence case. This function is commonly used in word processing software like Microsoft Word to quickly change the case of text without manually retyping it.

Option Analysis:

Option A: Correct. Shift+F3 is the correct shortcut for changing the case of selected text.
Option B: Incorrect. Ctrl+Shift+F3 is not a standard shortcut for changing case.
Option C: Incorrect. Ctrl+F5 is typically used to refresh a webpage, not to change text case.
Option D: Incorrect. Ctrl+Alt is not a standard shortcut for changing text case.

Mnemonic: Shift+F3: Switch Case

685. Which layer of the OSI model includes VLANs?

Correct Answer: Correct answer is: (B) Data Link.

Exam Relevance: CCNA, Network+, CompTIA Network+

Difficulty: Moderate

Concept notes: VLANs (Virtual Local Area Networks) are a network technology that allows for the creation of multiple logical networks within a single physical network. They operate at the Data Link layer of the OSI model, which is layer 2.

Common Mistakes: Students often confuse VLANs with other network technologies that operate at different layers of the OSI model, such as IP addressing at the Network layer.

Explanations: VLANs are implemented at the Data Link layer because they use MAC addresses and VLAN tags to segment traffic. This layer is responsible for the physical addressing and data transfer between devices on the same network segment. VLANs do not affect the physical layer (layer 1) or the network layer (layer 3) directly, as they are concerned with logical segmentation rather than physical connections or routing.

Option Analysis:

Option A: The Physical layer (layer 1) deals with the physical transmission of data, such as electrical signals, and does not involve logical network segmentation.
Option B: The Data Link layer (layer 2) is where VLANs operate, using MAC addresses and VLAN tags to create separate broadcast domains.
Option C: The Network layer (layer 3) is responsible for logical addressing and routing, not for creating VLANs.
Option D: The Transport layer (layer 4) is concerned with end-to-end communication and does not involve VLANs.

686. Twitter is generally used for:

Correct Answer: Correct answer is: (D) Social networking.

Exam Relevance: GRE, GMAT, SAT, TOEFL

Difficulty: Easy

Concept notes: Twitter is a platform primarily used for social networking, allowing users to share short messages, images, and videos with a wide audience.

Common Mistakes: Students may confuse Twitter with email services or think it is primarily used for private communication.

Explanations: Twitter is designed for social networking, enabling users to share information, engage in conversations, and connect with others publicly or semi-publicly. It is not primarily used for secret information sharing, electronic mailing, or interpersonal communication in a private context.

Option Analysis:

Option A: Twitter is not designed for secret information sharing. It is a public platform where information can be seen by anyone.
Option B: Twitter is not an electronic mailing service. Email services like Gmail or Outlook are used for electronic mailing.
Option C: While Twitter can be used for interpersonal communication, it is not its primary function. Social networking is the main purpose.
Option D: Twitter is a social networking platform where users can share information, engage in conversations, and connect with others.

687. The basic unit of a worksheet into which you enter data in Excel is called a

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

Exam Relevance: Microsoft Office Specialist, High School Computer Science Exams

Difficulty: Very Easy

Concept notes: In Excel, the basic unit of a worksheet where data is entered is called a cell.

Common Mistakes: Students may confuse a cell with a range, which is a collection of cells.

Explanations: A cell is the smallest unit in a worksheet where data can be entered, edited, or formatted. It is defined by the intersection of a row and a column. Each cell has a unique address based on its row and column position, such as A1 or B2.

Option Analysis:

Option A: A tab refers to a worksheet within a workbook, not the basic unit for data entry.
Option B: A box is not a standard term used in Excel for data entry units.
Option C: A cell is the correct term for the basic unit of a worksheet where data is entered.
Option D: A range refers to a group of cells, not the basic unit for data entry.

688. A circuit with about 100 transistors fabricated on a single chip is called.....

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

Exam Relevance: GATE, ECE, EE

Difficulty: Easy

Concept notes: MSI stands for Medium Scale Integration, which refers to integrated circuits containing a moderate number of transistors, typically ranging from 100 to 1,000.

Common Mistakes: Students may confuse MSI with other types of integration such as SSI (Small Scale Integration) or LSI (Large Scale Integration).

Explanations: A circuit with about 100 transistors fabricated on a single chip is classified as MSI. This is because MSI circuits typically contain between 100 and 1,000 transistors, fitting the description given in the question.

Option Analysis:

Option A: Correct. MSI stands for Medium Scale Integration, which fits the description of a circuit with about 100 transistors.
Option B: Incorrect. MIS is not a standard term for integrated circuits and does not refer to a specific scale of integration.
Option C: Incorrect. RJE is not a recognized term in the context of integrated circuits or scale of integration.
Option D: Incorrect. The correct answer is provided in the options, so "None of these" is not applicable.

689. The most widely used type of database management system is.....

Correct Answer: Correct answer is: (B) Relational database.

Exam Relevance: GRE, GMAT, Database Management Exams

Difficulty: Easy

Concept notes: Relational databases are the most widely used type of database management system due to their structured and flexible nature.

Common Mistakes: Students may confuse hierarchical or network databases with relational databases, as all three are types of database management systems.

Explanations: Relational databases use tables to organize data, with each table having a unique key to link related data. This structure allows for efficient querying and management of data, making them the most popular choice in various industries and applications.

Option Analysis:

Option A: Network databases use a graph structure to represent relationships between data, which is less common than the relational model.
Option B: Relational databases use tables and keys to organize data, making them the most widely used type of database management system.
Option C: Hierarchical databases use a tree-like structure, which is less flexible and less commonly used than relational databases.
Option D: This option is incorrect as relational databases are indeed the most widely used type.

Mnemonic: RDBMS: Relational Database Management System

690. What would you do to highlight a word? You position the cursor next to the word, and then

Correct Answer: Correct answer is: (A) Drag mouse while holding button down.

Exam Relevance: Computer Science Exams, Information Technology Exams, Digital Literacy Tests

Difficulty: Easy

Concept notes: Highlighting text involves selecting a portion of text by dragging the mouse while holding down the button.

Common Mistakes: Students may mistakenly believe that clicking the mouse once or rolling the mouse will highlight text.

Explanations: To highlight a word, you position the cursor next to the word and then drag the mouse while holding the button down. This action selects the text, which is visually indicated by a change in color or background shading, effectively highlighting the word.

Option Analysis:

Option A: Correct. Dragging the mouse while holding the button down selects the text, which highlights it.
Option B: Incorrect. Clicking the mouse once does not highlight text; it only places the cursor at a specific position.
Option C: Incorrect. Rolling the mouse and then clicking does not highlight text; it may change the zoom level or scroll the page.
Option D: Incorrect. This option is not applicable as one of the other options is correct.

Mnemonic: Drag to Highlight

⬅ Previous SetSet 69Next Set ➡

3 thoughts on “Information and Communication Technology MCQ - Set 69”

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 69”

Leave a Reply