Information and Communication Technology MCQ

961. Which component generates addresses

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

Exam Relevance: Computer Architecture, Computer Organization, Digital Systems

Difficulty: Moderate

Concept notes: The processor, also known as the Central Processing Unit (CPU), is responsible for generating addresses for memory and I/O operations.

Common Mistakes: Students may confuse the control unit with the processor, as the control unit is a part of the processor but does not independently generate addresses.

Explanations: The processor is the primary component responsible for generating addresses. It performs the necessary calculations to determine the memory locations where data is stored or retrieved. The control unit, which is a part of the processor, manages the flow of data and instructions but does not independently generate addresses. Main memory and secondary storage do not generate addresses; they store data at the addresses provided by the processor.

Option Analysis:

Option A: Secondary Storage does not generate addresses; it stores data at addresses provided by the processor.
Option B: The Processor generates addresses for memory and I/O operations.
Option C: Main Memory stores data at addresses provided by the processor, but it does not generate addresses.
Option D: The Control Unit is part of the processor and manages data flow but does not independently generate addresses.

Mnemonic: P-Gen: Processor Generates

962. In modern computers, the CPU speed is measured in?

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

Exam Relevance: SAT, ACT, AP Computer Science Principles

Difficulty: Easy

Concept notes: The speed of a CPU is measured in gigahertz (GHz), which indicates the number of cycles per second the CPU can perform.

Common Mistakes: Students may confuse gigahertz with other units like kilobytes or gigabytes, which are used to measure data storage, not speed.

Explanations: The speed of a CPU is measured in gigahertz (GHz). This unit represents the frequency of the clock signal that coordinates the timing of the CPU's operations. A higher GHz indicates a faster CPU, capable of performing more cycles per second.

Option Analysis:

Option A: Kilohertz is a unit of frequency, but it is too small for measuring modern CPU speeds. Modern CPUs operate at much higher frequencies, typically in the gigahertz range.
Option B: Gigabytes measure data storage capacity, not speed. This unit is used for memory and storage devices, not for measuring CPU speed.
Option C: Kilobytes measure data storage capacity, not speed. This unit is used for small amounts of data, not for measuring CPU speed.
Option D: Gigahertz is the correct unit for measuring CPU speed. It indicates the number of cycles per second the CPU can perform.

Mnemonic: GHz for CPU speed, not GB for storage.

963. To minimize all open windows and display the desktop.....

Correct Answer: Correct answer is: (A) Windows logo +D.

Exam Relevance: CCNA, CompTIA A+, Microsoft Certified: Windows Operating System Fundamentals

Difficulty: Very Easy

Concept notes: The Windows logo key combined with the D key is a keyboard shortcut used to minimize all open windows and display the desktop.

Common Mistakes: Students may confuse this shortcut with other Windows shortcuts, such as Windows logo + M to minimize all windows, or Windows logo + E to open File Explorer.

Explanations: The Windows logo + D shortcut is specifically designed to minimize all open windows and display the desktop. This is a commonly used shortcut for quickly accessing the desktop without closing any applications.

Option Analysis:

Option A: Correct. Windows logo + D minimizes all open windows and displays the desktop.
Option B: Incorrect. Windows logo + F is not a standard shortcut and does not perform the function described.
Option C: Incorrect. Windows logo + G is not a standard shortcut and does not perform the function described.
Option D: Incorrect. This option suggests that none of the provided shortcuts are correct, which is false.

Mnemonic: Desktop Display: D for Desktop

964. Mainframe computer was first developed by

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

Exam Relevance: AP Computer Science, SAT Subject Tests, High School Computer Science Exams

Difficulty: Easy

Concept notes: IBM (International Business Machines Corporation) is known for developing the first mainframe computer.

Common Mistakes: Students might confuse IBM with other technology companies like Sony or Microsoft, which are not associated with the development of the first mainframe computer.

Explanations: IBM developed the first mainframe computer, the IBM System/360, in the 1960s. This system was a significant advancement in computing technology, designed for large-scale data processing and business operations. The other companies listed, such as Sony and Microsoft, were not involved in the initial development of mainframe computers.

Option Analysis:

Option A: Sony is a consumer electronics company and not known for developing the first mainframe computer.
Option B: Microsoft is a software company and did not develop the first mainframe computer.
Option C: IBM is the correct answer as it developed the first mainframe computer.
Option D: Facebook is a social media company and not associated with the development of mainframe computers.

965. In E-R diagram, attributes are represented by.....

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

Exam Relevance: Database Management Systems, Information Systems, Computer Science Exams

Difficulty: Very Easy

Concept notes: In an E-R diagram, attributes are represented by ellipses.

Common Mistakes: Students may confuse the shapes used for entities, relationships, and attributes in an E-R diagram.

Explanations: In an E-R diagram, entities are represented by rectangles, relationships by diamonds, and attributes by ellipses. This is a standard convention used to clearly distinguish between different components of the diagram.

Option Analysis:

Option A: Correct. Attributes are represented by ellipses in an E-R diagram.
Option B: Incorrect. Diamonds represent relationships in an E-R diagram.
Option C: Incorrect. This is not the correct representation for attributes.
Option D: Incorrect. This option suggests all the above, which is not true.

Mnemonic: E-R Diagram Shapes: Rectangles for entities, Diamonds for relationships, Ellipses for attributes.

966. In Excel two common wildcard characters that Excel recognizes are

Correct Answer: Correct answer is: (A) * and?.

Exam Relevance: Microsoft Excel Certification, High School Computer Science Exams

Difficulty: Easy

Concept notes: In Excel, wildcard characters are used in search and filter functions to represent one or more unknown characters. The asterisk (*) represents any number of characters, while the question mark (?) represents a single character.

Common Mistakes: Students may confuse the wildcard characters with other symbols used in Excel, such as comparison operators like .

Explanations: The asterisk (*) and the question mark (?) are recognized as wildcard characters in Excel. The asterisk (*) can represent any sequence of characters, including an empty sequence, while the question mark (?) represents exactly one character. These characters are used in functions like VLOOKUP, MATCH, and in filtering criteria to match patterns.

Option Analysis:

Option A: Correct. The asterisk (*) and the question mark (?) are the correct wildcard characters in Excel.
Option B: Incorrect. The less-than () symbols are comparison operators, not wildcard characters.
Option C: Incorrect. U+ and / are not recognized as wildcard characters in Excel.
Option D: Incorrect. The plus (+) and period (.) symbols are not recognized as wildcard characters in Excel.

967. What are the three types of test data?

Correct Answer: Correct answer is: (A) Valid, invalid and erroneous.

Exam Relevance: ISTQB, CISSP, CSTE

Difficulty: Easy

Concept notes: Test data is categorized into three types: valid, invalid, and erroneous. Valid data represents correct and expected inputs. Invalid data includes inputs that do not conform to the expected format or constraints. Erroneous data refers to inputs that are incorrect or unexpected, often used to test system robustness.

Common Mistakes: Students may confuse erroneous data with invalid data, as both involve incorrect inputs. However, erroneous data specifically refers to unexpected or incorrect data, while invalid data refers to data that does not meet the expected format or constraints.

Explanations: The correct answer is valid, invalid, and erroneous because these categories cover all types of test data used in software testing. Valid data ensures the system functions correctly with expected inputs. Invalid data checks the system's ability to handle incorrect formats or constraints. Erroneous data tests the system's response to unexpected or incorrect inputs.

Option Analysis:

Option A: Correct. This option correctly identifies the three types of test data: valid, invalid, and erroneous.
Option B: Incorrect. Normal data is not a standard category in test data classification. The correct categories are valid, invalid, and erroneous.
Option C: Incorrect. Extreme data is not a standard category in test data classification. The correct categories are valid, invalid, and erroneous.
Option D: Incorrect. This option is not applicable as the correct categories are valid, invalid, and erroneous.

Mnemonic: VIE: Valid, Invalid, Erroneous

968. General-purpose computer made up of a separate monitor, keyboard, mouse and processor unit.

Correct Answer: Correct answer is: (A) Desktop Computer.

Exam Relevance: SAT, ACT, AP Computer Science Principles

Difficulty: Easy

Concept notes: A desktop computer is a general-purpose computer that consists of separate components such as a monitor, keyboard, mouse, and processor unit.

Common Mistakes: Students may confuse a desktop computer with a laptop, which is a portable version of a computer with all components integrated into a single unit.

Explanations: A desktop computer is characterized by its separate components, including a monitor, keyboard, mouse, and processor unit. This configuration allows for greater flexibility in terms of customization and upgradeability compared to a laptop. The separate components also provide a more ergonomic setup for extended use.

Option Analysis:

Option A: Correct. A desktop computer is made up of separate components.
Option B: Incorrect. A laptop computer has all components integrated into a single unit.
Option C: Incorrect. Night Vision Enhancement (NVE) is unrelated to computer hardware.
Option D: Incorrect. Virtual reality is a technology for creating simulated environments and is not a type of computer.

969. When encapsulating data using the OSI model as a reference, the MAC address of the sending and receiving hosts is identified at which layer?

Correct Answer: Correct answer is: (B) Layer 2.

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Moderate

Concept notes: The OSI model is a conceptual framework used to understand and describe the functions of a telecommunication or computing system. Layer 2, known as the Data Link Layer, is responsible for the physical addressing of devices on a network, which includes the use of MAC addresses.

Common Mistakes: Students often confuse Layer 2 with Layer 3 (Network Layer), which deals with logical addressing (IP addresses) rather than physical addressing (MAC addresses).

Explanations: The Data Link Layer (Layer 2) is responsible for the physical addressing of devices on a network. This layer uses MAC addresses to identify the sending and receiving hosts. The MAC address is a unique identifier assigned to network interfaces for communications at the data link layer of a network segment. Therefore, the correct answer is Layer 2.

Option Analysis:

Option A: Layer 7 is the Application Layer, which deals with software applications and end-user processes. It does not handle MAC addresses.
Option B: Layer 2 is the Data Link Layer, which is responsible for physical addressing using MAC addresses.
Option C: Layer 4 is the Transport Layer, which is responsible for end-to-end communication and does not handle MAC addresses.
Option D: Layer 3 is the Network Layer, which is responsible for logical addressing using IP addresses, not MAC addresses.

Mnemonic: MAC for Layer 2, IP for Layer 3.

970. Which type of computing is located at the edge of a business or corporate network and that allows data from sensors to be preprocessed?

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

Exam Relevance: Computer Networks, Cloud Computing, Distributed Systems

Difficulty: Moderate

Concept notes: Fog computing is a distributed computing paradigm that extends cloud computing to the edge of the network. It allows data from sensors to be preprocessed before being sent to the cloud, reducing latency and bandwidth usage.

Common Mistakes: Students may confuse fog computing with cloud computing, which is centralized and does not necessarily involve edge processing.

Explanations: Fog computing is specifically designed to handle data processing at the edge of the network, which is closer to the source of the data. This allows for real-time data analysis and reduces the amount of data that needs to be transmitted to the cloud, thereby decreasing latency and improving efficiency. The other options do not specifically address edge computing or data preprocessing at the network edge.

Option Analysis:

Option A: Internet is a global network of interconnected devices and does not specifically refer to edge computing or data preprocessing.
Option B: Fog computing is the correct answer as it involves processing data at the edge of the network, closer to the source of the data.
Option C: Wireless refers to communication without wires and does not specifically address edge computing or data preprocessing.
Option D: WAN (Wide Area Network) is a network that spans a large geographical area but does not specifically refer to edge computing or data preprocessing.

Mnemonic: Foggy Edge: Fog computing processes data at the edge.

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3 thoughts on “Information and Communication Technology MCQ - Set 97”

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 97”

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