Information and Communication Technology MCQ

1201. From which generation computers the printers were used?

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

Exam Relevance: SAT, ACT, AP Computer Science Principles

Difficulty: Easy

Concept notes: Printers became commonly used with the advent of second-generation computers.

Common Mistakes: Students may confuse the timeline of technological advancements in computer generations.

Explanations: Second-generation computers, which used transistors instead of vacuum tubes, were more reliable and efficient. This generation saw the development of more user-friendly peripherals, including printers, which were essential for outputting data in a readable format.

Option Analysis:

Option A: First-generation computers used vacuum tubes and were less advanced in terms of peripherals like printers.
Option B: Second-generation computers introduced transistors and more advanced peripherals, including printers.
Option C: Third-generation computers used integrated circuits but printers were already in use from the second generation.
Option D: Fourth-generation computers used microprocessors, but printers were already established by the second generation.

Mnemonic: Transistors, Printers, Second Gen

1202. A technique used by codes to convert an analog signal into a digital bit stream is known as

Correct Answer: Correct answer is: (B) Pulse Code Modulation.

Exam Relevance: GATE, ECE, EE, Digital Communication Exams

Difficulty: Easy

Concept notes: Pulse Code Modulation (PCM) is a method used to convert analog signals into digital form.

Common Mistakes: Students may confuse Pulse Code Modulation with Pulse Signal Modulation, which is not a standard term.

Explanations: Pulse Code Modulation (PCM) is the process of converting an analog signal into a digital bit stream. It involves sampling the analog signal at regular intervals, quantizing the sampled values to the nearest discrete level, and then encoding these levels into a binary code. This method is widely used in digital communication systems for transmitting analog signals in digital form.

Option Analysis:

Option A: Digital Signal Generator is not a method for converting analog signals to digital form; it generates digital signals.
Option B: Pulse Code Modulation is the correct method for converting analog signals into a digital bit stream.
Option C: Pulse Signal Modulation is not a standard term and does not refer to a method of analog-to-digital conversion.
Option D: None of these is incorrect as Pulse Code Modulation is a valid and widely used technique.

Mnemonic: PCM: Pulse Code Modulation

1203. The difference between IMAP and POP protocols:

Correct Answer: Correct answer is: (B) POP allows to download emails once the user access the email account while IMAP not.

Exam Relevance: CISSP, CompTIA Network+, CCNA

Difficulty: Easy

Concept notes: The POP (Post Office Protocol) and IMAP (Internet Message Access Protocol) are two different protocols used for accessing email. POP is designed to download emails from the server to the local device, typically deleting them from the server after download. IMAP, on the other hand, allows users to access emails from multiple devices and keeps the emails on the server.

Common Mistakes: A common misunderstanding is that both protocols function similarly, when in fact they have distinct methods of handling email storage and access.

Explanations: The correct answer is that POP allows emails to be downloaded once the user accesses the email account, while IMAP does not. POP downloads emails to the local device and typically deletes them from the server, whereas IMAP keeps emails on the server and allows synchronized access across multiple devices.

Option Analysis:

Option A: Incorrect because IMAP does not download emails to the local device by default; it keeps them on the server.
Option B: Correct as POP downloads emails to the local device, while IMAP does not.
Option C: Incorrect because only POP allows downloading emails to the local device; IMAP does not.
Option D: Incorrect because POP does allow downloading emails to the local device.

1204. Which of the following will not advance the slides in a slide show view?

Correct Answer: Correct answer is: (A) The esc key.

Exam Relevance: GRE, GMAT, PTE, TOEFL

Difficulty: Easy

Concept notes: In slide show view, the esc key is used to exit the presentation, not to advance slides.

Common Mistakes: Students may mistakenly believe that the esc key advances slides, as it is commonly used to navigate in other software applications.

Explanations: The esc key is used to exit the slide show view, not to advance slides. The space bar, enter key, and mouse button are all commonly used to advance slides in a presentation.

Option Analysis:

Option A: The esc key exits the slide show view.
Option B: The space bar advances slides.
Option C: The enter key advances slides.
Option D: The mouse button advances slides.

Mnemonic: ESC to Exit, not Slide

1205. Which is the part of the computer system that one can physically touch?

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

Exam Relevance: SAT, ACT, AP Computer Science Principles

Difficulty: Easy

Concept notes: Hardware refers to the physical components of a computer system that can be touched and seen, such as the monitor, keyboard, mouse, and internal parts like the motherboard and hard drive.

Common Mistakes: Students may confuse hardware with software, which is the non-physical part of the computer system, such as programs and applications.

Explanations: Hardware is the tangible part of a computer system that includes all the physical components. These components are essential for the operation of the computer and can be physically interacted with. Data, operating systems, and software are intangible and cannot be physically touched.

Option Analysis:

Option A: Data is not a physical component of a computer system; it is information processed by the computer.
Option B: An operating system is software, which is not a physical component of a computer system.
Option C: Hardware includes all the physical components of a computer system that can be touched and seen.
Option D: Software is not a physical component of a computer system; it consists of programs and applications.

1206. What phase of the TCP communication process is attacked during a TCP SYN flood attack?

Correct Answer: Correct answer is: (A) Three-way handshake.

Exam Relevance: CISSP, CompTIA Security+, CCNA Security

Difficulty: Moderate

Concept notes: A TCP SYN flood attack targets the initial phase of establishing a TCP connection, known as the three-way handshake.

Common Mistakes: Students may confuse the attack with other types of TCP attacks that occur during different phases of the connection.

Explanations: A TCP SYN flood attack specifically targets the three-way handshake phase. During this phase, the attacker sends a large number of SYN (synchronize) requests to the target server, overwhelming it and preventing legitimate connections from being established. This phase is crucial because it is the initial step in establishing a TCP connection, and by flooding it with SYN requests, the attacker can effectively deny service to legitimate users.

Option Analysis:

Option A: Correct. The three-way handshake is the phase targeted by a TCP SYN flood attack.
Option B: Incorrect. The connection established phase occurs after the three-way handshake and is not the target of a SYN flood attack.
Option C: Incorrect. The connection closed phase is unrelated to the SYN flood attack.
Option D: Incorrect. The connection reset phase is also unrelated to the SYN flood attack.

Mnemonic: SYN Flood: "S" for "Start" of the handshake.

1207. File extensions are used in order to.....

Correct Answer: Correct answer is: (D) Identify the file type.

Exam Relevance: SAT, ACT, AP Computer Science Principles

Difficulty: Easy

Concept notes: File extensions are used to identify the type of file, which helps the operating system determine how to open and handle the file.

Common Mistakes: Students may confuse file extensions with file names, thinking they are used to name the file rather than identify its type.

Explanations: File extensions are suffixes added to the end of a file name, typically separated by a period. They provide information about the file's format and type, such as .txt for text files, .jpg for JPEG images, and .docx for Word documents. This information is crucial for the operating system to recognize the file type and open it with the appropriate application.

Option Analysis:

Option A: File extensions are not used to name the file; the name is specified before the extension.
Option B: File extensions do not ensure the filename is not lost; they are for identifying the file type.
Option C: While file extensions can help identify a file, their primary purpose is to identify the file type.
Option D: File extensions are used to identify the file type, which is the correct answer.

1208. Which term is not used to describe the memory component of a computer?

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

Exam Relevance: SAT, ACT, AP Computer Science Principles

Difficulty: Easy

Concept notes: The correct answer is SAM because it is not a standard term used to describe the memory components of a computer.

Common Mistakes: Students may mistakenly think SAM is a type of memory, but it is not a standard term used in computer memory terminology.

Explanations: ROM (Read-Only Memory), PROM (Programmable Read-Only Memory), and RAM (Random Access Memory) are all standard terms used to describe different types of memory in a computer. SAM, however, is not a recognized term in this context.

Option Analysis:

Option A: ROM is a type of memory used to store firmware or software that is permanently programmed into the memory chip.
Option B: PROM is a type of memory that can be programmed once by the user, typically using a PROM programmer.
Option C: RAM is a type of volatile memory used for temporary data storage and is essential for the operation of a computer.
Option D: SAM is not a standard term used to describe computer memory components.

1209. When an input electrical signal A=10100 is applied to a NOT gate, its output signal is

Correct Answer: Correct answer is: (A) 01011

Exam Relevance: SAT Subject Test in Physics, AP Physics 2, GATE EC

Difficulty: Very Easy

Concept notes: The NOT gate inverts each bit of the input signal. For a binary input, each 0 becomes 1 and each 1 becomes 0.

Common Mistakes: Students may confuse the NOT gate with other logic gates such as AND, OR, or XOR, which do not invert the input bits.

Explanations: The input signal is 10100. The NOT gate inverts each bit. Therefore, 1 becomes 0 and 0 becomes 1. Applying this to each bit of the input, the output is 01011.

Option Analysis:

Option A: This is the correct output after inverting each bit of the input signal.
Option B: This is incorrect because it does not correctly invert each bit of the input signal.
Option C: This is incorrect because it does not correctly invert each bit of the input signal.
Option D: This is incorrect because it does not correctly invert each bit of the input signal.

Mnemonic: NOT gate: "N" for "Negate" each bit.

1210. Turner Textiles is a supplier to Kirby Hobby Stores. Kirby Hobby Stores uses a login to a Web page to access the online ordering system of Turner Textiles. What type of network does Turner Textiles have set up for Kirby Hobby Stores?

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

Exam Relevance: CISSP, CompTIA Network+, CCNA

Difficulty: Easy

Concept notes: An extranet is a private network that uses Internet protocols and the public telecommunication system to share part of an organization's information or operations with suppliers, vendors, partners, customers, or other businesses.

Common Mistakes: Students may confuse an extranet with an intranet, which is a private network used only by an organization's internal members, employees, or others with authorization.

Explanations: Turner Textiles has set up an extranet for Kirby Hobby Stores. An extranet allows external entities, such as Kirby Hobby Stores, to access specific parts of Turner Textiles' internal network securely. This setup enables Kirby Hobby Stores to use a login to access the online ordering system of Turner Textiles, which is a typical use case for an extranet.

Option Analysis:

Option A: Correct. An extranet is the correct term for a network that allows external entities to access specific parts of an organization's internal network.
Option B: Incorrect. An intranet is a private network used only by an organization's internal members and does not involve external access.
Option C: Incorrect. A Virtual Private Network (VPN) is a secure connection between a private network and an external user, but it does not describe the specific scenario of external access to a business's internal network for a specific purpose like online ordering.
Option D: Incorrect. The Internet is a public network and does not provide the secure, controlled access that an extranet provides.

Mnemonic: E for Extranet, External access.

⬅ Previous SetSet 121Next Set ➡

3 thoughts on “Information and Communication Technology MCQ - Set 121”

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 121”

Leave a Reply