Information and Communication Technology MCQ

751. What is the function of the control unit?

Correct Answer: Correct answer is: (A) Has overall control of the CPU. It's in charge of the F-D-E cycle.

Exam Relevance: AP Computer Science Principles, A Level Computer Science, SAT Subject Test in Computer Science

Difficulty: Easy

Concept notes: The control unit is a crucial component of the CPU that manages and coordinates the operations of the computer system.

Common Mistakes: Students may confuse the control unit with the arithmetic logic unit (ALU), which performs calculations, or with the cache, which is a type of fast memory.

Explanations: The control unit is responsible for directing the operation of the processor. It fetches instructions from memory, decodes them, and executes them, which is known as the Fetch-Decode-Execute (F-D-E) cycle. This makes it the central controller of the CPU's activities.

Option Analysis:

Option A: Correct. The control unit has overall control of the CPU and manages the F-D-E cycle.
Option B: Incorrect. The arithmetic logic unit (ALU) is responsible for performing calculations, not the control unit.
Option C: Incorrect. Cache is a type of fast memory, not a control function.
Option D: Incorrect. The CPU runs programs stored in memory, but this does not describe the function of the control unit.

Mnemonic: Control Unit: "Fetch, Decode, Execute" - FDE

752. Which of the following involves creating a single cell by combining two or more selected cells?

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

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

Difficulty: Easy

Concept notes: Merging cells combines two or more selected cells into a single cell in a spreadsheet or table.

Common Mistakes: Students may confuse merging with splitting, which divides a single cell into multiple cells.

Explanations: Merging cells involves combining two or more selected cells into a single cell. This is a common operation in spreadsheet software like Microsoft Excel or Google Sheets, where it is used to create a larger cell that spans multiple rows or columns. The other options do not involve combining cells: formatting changes the appearance of cells, splitting divides a cell into multiple cells, and "None of the Above" is not applicable here.

Option Analysis:

Option A: Formatting changes the appearance of cells, not their combination.
Option B: Splitting divides a single cell into multiple cells, the opposite of merging.
Option C: Merging combines two or more selected cells into a single cell.
Option D: "None of the Above" is incorrect as merging is the correct answer.

753. ..... is the measurement of things such as fingerprints and retinal scans used for security access.

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

Exam Relevance: SAT, ACT, AP Computer Science

Difficulty: Easy

Concept notes: Biometrics refers to the measurement and analysis of unique physical or behavioral characteristics, such as fingerprints and retinal scans, for identification and security purposes.

Common Mistakes: Students may confuse biometrics with general computer security measures or biomeasurement, which does not specifically refer to the use of physical or behavioral traits for security.

Explanations: Biometrics is the correct term for the measurement and analysis of unique physical or behavioral characteristics, such as fingerprints and retinal scans, used for security access. This technology relies on the uniqueness of individual traits to ensure secure identification.

Option Analysis:

Option A: Correct. Biometrics is the accurate term for the measurement of unique physical or behavioral characteristics for security purposes.
Option B: Incorrect. Biomeasurement is not a standard term and does not specifically refer to security-related measurements.
Option C: Incorrect. Computer security is a broader term that includes various methods and technologies, not just biometric measurements.
Option D: Incorrect. Smart weapon machinery is unrelated to the measurement of physical or behavioral traits for security access.

Mnemonic: Fingerprints, Retina, Unique Traits = Biometrics

754. Logical operators like AND, OR and NOT that are used to refine searches by combining field names to exclude and include particular records.

Correct Answer: Correct answer is: (A) Boolean Operators.

Exam Relevance: SAT, ACT, AP Computer Science

Difficulty: Easy

Concept notes: Boolean operators are used to combine search terms to refine search results.

Common Mistakes: Students may confuse Boolean operators with other types of operators used in programming or mathematics.

Explanations: Boolean operators like AND, OR, and NOT are used to refine searches by combining field names to exclude or include particular records. This is why the correct answer is Boolean Operators.

Option Analysis:

Option A: Correct. Boolean operators are used to refine searches by combining field names to exclude or include particular records.
Option B: Incorrect. Data types refer to the classification of data items, not search refinement.
Option C: Incorrect. Data duplication refers to the copying of data, not search refinement.
Option D: Incorrect. A record is a collection of data fields, not a method for refining searches.

Mnemonic: AND, OR, NOT - AON

755. A QR code uses four standardized encoding modes to efficiently store data; extensions may also be used.

Correct Answer: Correct answer is: (A) Quick Response Codes (QR).

Exam Relevance: GRE, GMAT, IT Certification Exams

Difficulty: Easy

Concept notes: QR codes are a type of matrix barcode that can be read by dedicated QR readers or smartphone cameras. They are used to store information in a compact, scannable format.

Common Mistakes: Students may confuse QR codes with other types of barcodes or scanning technologies, such as RFID or NFC.

Explanations: QR codes use four standardized encoding modes to efficiently store data. These modes include numeric, alphanumeric, byte/binary, and kanji. Extensions to these modes can also be used to store additional types of data. The correct answer is Quick Response Codes (QR) because they are specifically designed to store and transmit data in a structured and efficient manner.

Option Analysis:

Option A: Correct. QR codes use four standardized encoding modes.
Option B: Incorrect. A webcam is a video capture device and not related to encoding data in QR codes.
Option C: Incorrect. A tracker ball is a pointing device and not related to encoding data in QR codes.
Option D: Incorrect. A touchscreen is an input device and not related to encoding data in QR codes.

Mnemonic: QR = Quick Response

756. In a sequence of events that takes place in an instruction cycle, the first cycle is.....

Correct Answer: Correct answer is: (C) Fetch cycle.

Exam Relevance: Computer Architecture, Computer Organization, Microprocessors

Difficulty: Easy

Concept notes: In the instruction cycle of a computer, the fetch cycle is the first step where the CPU retrieves the next instruction from memory.

Common Mistakes: Students often confuse the fetch cycle with the decode cycle, which occurs after the instruction is fetched.

Explanations: The fetch cycle is the initial phase in the instruction cycle where the CPU retrieves the next instruction from memory. This is a crucial step because it sets the stage for the subsequent decode and execute cycles. The decode cycle follows, where the instruction is interpreted, and the execute cycle is where the instruction is carried out. Therefore, the fetch cycle is the first cycle in the sequence.

Option Analysis:

Option A: The execute cycle is the third phase where the instruction is carried out, not the first.
Option B: The decode cycle is the second phase where the instruction is interpreted, not the first.
Option C: The fetch cycle is the first phase where the instruction is retrieved from memory.
Option D: The restore cycle is not a standard phase in the instruction cycle.

Mnemonic: Fetch First, Decode, Execute (FDE)

757. A language that is close to human language and which is easy to write, debug and maintain is known as.....

Correct Answer: Correct answer is: (A) A High Level Language.

Exam Relevance: ACM, IEEE, GRE Computer Science

Difficulty: Easy

Concept notes: High-level languages are designed to be closer to human language, making them easier to write, debug, and maintain compared to low-level languages like assembly or machine code.

Common Mistakes: Students may confuse high-level languages with low-level languages, which are closer to machine code and harder to write and debug.

Explanations: High-level languages are designed to be more readable and closer to natural human language. They abstract away many of the complexities of machine code, making them easier to write, debug, and maintain. This is why they are preferred for most programming tasks.

Option Analysis:

Option A: Correct. High-level languages are designed to be closer to human language, making them easier to write, debug, and maintain.
Option B: Incorrect. Low-level languages are closer to machine code and are harder to write, debug, and maintain.
Option C: Incorrect. An algorithm is a set of instructions for solving a problem, not a language.
Option D: Incorrect. Machine code is the lowest level of programming language and is not easy to write, debug, or maintain.

758. Match the access control type to its definition: Mandatory access control

Correct Answer: Correct answer is: (C) Secures information by assigning sensitivity (security level) labels on information and comparing them to the level of sensitivity that a user is operating at. Usually appropriate for extremely secure systems including military applications or mission critical applications.

Exam Relevance: CISSP, CompTIA Security+, CISA

Difficulty: Moderate

Concept notes: Mandatory access control (MAC) is a type of access control that restricts access to information based on the sensitivity of the information and the clearance level of the user.

Common Mistakes: Students may confuse mandatory access control with discretionary access control (DAC) or role-based access control (RBAC), which operate on different principles.

Explanations: Mandatory access control (MAC) is characterized by the assignment of security labels to both data and users. These labels define the sensitivity levels, and access is granted based on a comparison between the user's clearance level and the data's security label. This approach is particularly suited for highly secure environments where strict control over information access is necessary.

Option Analysis:

Option A: This describes discretionary access control (DAC), where the owner of the information can set access permissions.
Option B: This describes role-based access control (RBAC), where access is based on the user's role within the organization.
Option C: This correctly describes mandatory access control (MAC), where access is based on security labels and clearance levels.
Option D: This is incorrect as the correct definition is provided in Option C.

Mnemonic: MAC - Mandatory Access Control: Military Applications, Clearance

759. What is meant by a process?

Correct Answer: Correct answer is: (A) An action that takes place.

Exam Relevance: SAT, ACT, AP Exams

Difficulty: Easy

Concept notes: A process refers to a series of actions or steps taken to achieve a particular result or outcome.

Common Mistakes: Students may confuse a process with a specific output or input, rather than understanding it as a series of actions.

Explanations: A process is defined as an action that takes place, involving a series of steps or actions to achieve a specific goal. This aligns with the correct answer, as it emphasizes the dynamic and active nature of a process.

Option Analysis:

Option A: Correct. A process is indeed an action that takes place.
Option B: Incorrect. A process is not specifically a way of calculating something.
Option C: Incorrect. An output is the result of a process, not the process itself.
Option D: Incorrect. Inputting information is a part of a process but does not define the entire process.

760. What is the technical word for 'Delay'?

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

Exam Relevance: CCNA, CISSP, CompTIA Network+

Difficulty: Easy

Concept notes: Latency refers to the delay before a transfer of data begins following an instruction for its transfer.

Common Mistakes: Students may confuse latency with bandwidth, which measures the amount of data that can be transferred over a network.

Explanations: Latency is the technical term for delay in data transmission. It measures the time it takes for data to travel from the source to the destination. This delay is crucial in network performance and is often a key factor in determining the responsiveness of a network.

Option Analysis:

Option A: Bandwidth refers to the amount of data that can be transmitted over a network, not the delay.
Option B: Latency is the correct term for delay in data transmission.
Option C: Backbone router is a device that routes data within a network, not a measure of delay.
Option D: Web server is a computer that delivers content or services to end users over the internet, not a measure of delay.

Mnemonic: LAD: Latency Adds Delay

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3 thoughts on “Information and Communication Technology MCQ - Set 76”

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 76”

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