Please keep at least one language enabled. || కనీసం ఒక భాషను ఎంచుకోండి.
Question 1
ప్రశ్న 1
During execution of an instruction, one unit directs the ALU to perform an arithmetic operation, coordinates the movement of data from memory and controls the sequence of operations. Which functional unit is performing this role?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• The Control Unit directs and coordinates the activities of the major functional units of a computer.
• It interprets instructions and issues control signals required for their execution.
• The ALU performs arithmetic and logical operations, but the Control Unit coordinates when and how those operations are carried out.
• It interprets instructions and issues control signals required for their execution.
• The ALU performs arithmetic and logical operations, but the Control Unit coordinates when and how those operations are carried out.
వివరణ:
Question 2
ప్రశ్న 2
Which of the following correctly describes the principal function of the input unit of a computer?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• The input unit accepts data and instructions from users or external devices.
• It converts the received information into a machine-usable representation and supplies it for processing.
• Arithmetic processing belongs primarily to the CPU, while presentation of results is the role of the output unit.
• It converts the received information into a machine-usable representation and supplies it for processing.
• Arithmetic processing belongs primarily to the CPU, while presentation of results is the role of the output unit.
వివరణ:
Question 3
ప్రశ్న 3
Match List I with List II:
List I
(a) Input Unit
(b) ALU
(c) Control Unit
(d) Output Unit
List II
1. Performs arithmetic and logical operations
2. Presents processed results
3. Accepts data and instructions
4. Directs and coordinates processing activities
Choose the correct matching code.
List I
(a) Input Unit
(b) ALU
(c) Control Unit
(d) Output Unit
List II
1. Performs arithmetic and logical operations
2. Presents processed results
3. Accepts data and instructions
4. Directs and coordinates processing activities
Choose the correct matching code.
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• The Input Unit accepts data and instructions, giving (a)-3.
• The ALU performs arithmetic and logical operations, giving (b)-1.
• The Control Unit coordinates activities, while the Output Unit presents processed results, giving (c)-4 and (d)-2.
• The ALU performs arithmetic and logical operations, giving (b)-1.
• The Control Unit coordinates activities, while the Output Unit presents processed results, giving (c)-4 and (d)-2.
వివరణ:
Question 4
ప్రశ్న 4
A student enters examination marks through a keyboard. The computer calculates the total and percentage, stores the result and displays it on the monitor. Which sequence correctly represents these operations?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Entering marks through the keyboard is the input stage.
• Calculating total and percentage is processing, followed by storage of the result.
• Displaying the result on the monitor is the output stage, giving Input → Processing → Storage → Output.
• Calculating total and percentage is processing, followed by storage of the result.
• Displaying the result on the monitor is the output stage, giving Input → Processing → Storage → Output.
వివరణ:
Question 5
ప్రశ్న 5
Which of the following statements about the memory unit is most appropriate?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• The memory unit can store programs, input data, intermediate processing results and final results depending on the operation being performed.
• Memory is therefore not restricted to storing only final output.
• Arithmetic and logical operations are performed by the CPU's ALU rather than by the memory unit.
• Memory is therefore not restricted to storing only final output.
• Arithmetic and logical operations are performed by the CPU's ALU rather than by the memory unit.
వివరణ:
Question 6
ప్రశ్న 6
Assertion (A): The CPU is often called the 'brain' of a computer.
Reason (R): It interprets and executes instructions and controls or coordinates major processing operations.
Choose the correct answer.
Reason (R): It interprets and executes instructions and controls or coordinates major processing operations.
Choose the correct answer.
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• The CPU executes program instructions and performs or coordinates the major processing activities of the computer.
• Its processing and control responsibilities are the reason it is commonly referred to as the brain of the computer.
• Therefore both the Assertion and Reason are true, and the Reason correctly explains the Assertion.
• Its processing and control responsibilities are the reason it is commonly referred to as the brain of the computer.
• Therefore both the Assertion and Reason are true, and the Reason correctly explains the Assertion.
వివరణ:
Question 7
ప్రశ్న 7
Consider the following statements:
1. The ALU performs arithmetic operations.
2. The ALU performs logical comparisons.
3. The Control Unit coordinates the execution of instructions.
4. The Output Unit supplies instructions to the ALU for execution.
Which of the statements given above are correct?
1. The ALU performs arithmetic operations.
2. The ALU performs logical comparisons.
3. The Control Unit coordinates the execution of instructions.
4. The Output Unit supplies instructions to the ALU for execution.
Which of the statements given above are correct?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Statements 1 and 2 are correct because the ALU performs arithmetic and logical operations.
• Statement 3 is correct because the Control Unit coordinates instruction execution.
• Statement 4 is incorrect because the Output Unit presents results; it does not control ALU execution.
• Statement 3 is correct because the Control Unit coordinates instruction execution.
• Statement 4 is incorrect because the Output Unit presents results; it does not control ALU execution.
వివరణ:
Question 8
ప్రశ్న 8
Which component of the CPU is primarily responsible for operations such as addition, subtraction, comparison and Boolean logic?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• The Arithmetic Logic Unit performs arithmetic operations such as addition and subtraction.
• It also performs logical operations and comparisons.
• Input, output and secondary storage units have different roles and do not perform the CPU's primary arithmetic and logical processing.
• It also performs logical operations and comparisons.
• Input, output and secondary storage units have different roles and do not perform the CPU's primary arithmetic and logical processing.
వివరణ:
Question 9
ప్రశ్న 9
Which of the following statements is NOT correct regarding the functional units of a computer?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• The ALU performs arithmetic and logical operations; it is not the functional unit primarily responsible for accepting external input.
• Input devices communicate through the input system, which supplies data to the computer for processing.
• Memory stores required data and instructions, while the Output Unit presents processed results.
• Input devices communicate through the input system, which supplies data to the computer for processing.
• Memory stores required data and instructions, while the Output Unit presents processed results.
వివరణ:
Question 10
ప్రశ్న 10
A barcode reader sends a product code to a computer. The system retrieves the corresponding price, calculates the bill and prints a receipt. In this example, which activity represents the output stage?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Printing the receipt presents the processed result and therefore represents output.
• Reading the barcode is input.
• Retrieving stored information and calculating the bill are operations associated with storage access and processing.
• Reading the barcode is input.
• Retrieving stored information and calculating the bill are operations associated with storage access and processing.
వివరణ:
Question 11
ప్రశ్న 11
Which functional unit is responsible for interpreting instructions and generating the control signals necessary to coordinate other units of the computer?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• The Control Unit interprets program instructions and coordinates their execution.
• It generates control signals that regulate data movement and the activities of other functional units.
• The ALU carries out arithmetic and logical operations under this coordination.
• It generates control signals that regulate data movement and the activities of other functional units.
• The ALU carries out arithmetic and logical operations under this coordination.
వివరణ:
Question 12
ప్రశ్న 12
A computer is calculating the expression 48 + 27 and comparing the result with 100. Which functional unit performs both the addition and the comparison?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Addition is an arithmetic operation and comparison is a logical operation.
• Both are performed by the Arithmetic Logic Unit.
• The Control Unit directs execution but does not itself perform the arithmetic operation represented in the question.
• Both are performed by the Arithmetic Logic Unit.
• The Control Unit directs execution but does not itself perform the arithmetic operation represented in the question.
వివరణ:
Question 13
ప్రశ్న 13
Match the activity with the corresponding stage of the Input–Process–Output–Storage cycle:
(a) Capturing fingerprint-related numerical data through an input device
(b) Comparing entered values according to programmed rules
(c) Saving the processed record for later retrieval
(d) Displaying the result
1. Processing
2. Output
3. Storage
4. Input
Choose the correct matching code.
(a) Capturing fingerprint-related numerical data through an input device
(b) Comparing entered values according to programmed rules
(c) Saving the processed record for later retrieval
(d) Displaying the result
1. Processing
2. Output
3. Storage
4. Input
Choose the correct matching code.
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Capturing data is Input, so (a)-4.
• Applying programmed rules to the data is Processing, so (b)-1.
• Saving the record represents Storage, while displaying the result represents Output, giving (c)-3 and (d)-2.
• Applying programmed rules to the data is Processing, so (b)-1.
• Saving the record represents Storage, while displaying the result represents Output, giving (c)-3 and (d)-2.
వివరణ:
Question 14
ప్రశ్న 14
Which statement best distinguishes the Control Unit from the Arithmetic Logic Unit?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• The Control Unit manages and coordinates the execution of instructions.
• The ALU performs arithmetic calculations, comparisons and logical operations.
• These two components therefore have complementary but distinct roles within the CPU.
• The ALU performs arithmetic calculations, comparisons and logical operations.
• These two components therefore have complementary but distinct roles within the CPU.
వివరణ:
Question 15
ప్రశ్న 15
A computer receives the numbers 36 and 24, determines which is greater and displays the larger number. Which sequence of functional activities is correct?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• The two numbers must first be supplied as input.
• Determining which number is greater requires a logical comparison performed during processing by the ALU.
• The selected larger value is then presented through the output stage.
• Determining which number is greater requires a logical comparison performed during processing by the ALU.
• The selected larger value is then presented through the output stage.
వివరణ:
Question 16
ప్రశ్న 16
Consider the following functions:
1. Receiving instructions from an input device
2. Performing arithmetic calculations
3. Coordinating the execution of instructions
4. Communicating processed results
Which functional units respectively perform these functions?
1. Receiving instructions from an input device
2. Performing arithmetic calculations
3. Coordinating the execution of instructions
4. Communicating processed results
Which functional units respectively perform these functions?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• The Input Unit receives data and instructions from input devices.
• Arithmetic calculations are performed by the ALU.
• The Control Unit coordinates instruction execution, and the Output Unit communicates processed results.
• Arithmetic calculations are performed by the ALU.
• The Control Unit coordinates instruction execution, and the Output Unit communicates processed results.
వివరణ:
Question 17
ప్రశ్న 17
Which of the following is the most appropriate function of storage in the Input–Process–Output–Storage model?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Storage retains data, instructions and results for subsequent use or retrieval.
• Stored information may be accessed during later processing operations.
• Printing is an output function, arithmetic is a processing function and generation of processor control signals belongs to the Control Unit.
• Stored information may be accessed during later processing operations.
• Printing is an output function, arithmetic is a processing function and generation of processor control signals belongs to the Control Unit.
వివరణ:
Question 18
ప్రశ్న 18
Consider the following pairs:
1. Keyboard — Input
2. Monitor — Output
3. ALU — Processing
4. Memory — Storage
Which of the pairs are correctly matched?
1. Keyboard — Input
2. Monitor — Output
3. ALU — Processing
4. Memory — Storage
Which of the pairs are correctly matched?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• A keyboard is an input device and a monitor is an output device.
• The ALU performs arithmetic and logical processing.
• Memory provides storage for data and instructions, so all four pairs are correctly matched.
• The ALU performs arithmetic and logical processing.
• Memory provides storage for data and instructions, so all four pairs are correctly matched.
వివరణ:
Question 19
ప్రశ్న 19
Assertion (A): An output device normally receives information after it has been processed by the computer.
Reason (R): The principal function of an output unit is to convert processed results into a form suitable for users or external systems.
Choose the correct answer.
Reason (R): The principal function of an output unit is to convert processed results into a form suitable for users or external systems.
Choose the correct answer.
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Output is the stage at which processed information is communicated outside the processing system.
• Output devices convert computer-generated results into forms suitable for users or other devices.
• Therefore both statements are true and the Reason correctly explains the Assertion.
• Output devices convert computer-generated results into forms suitable for users or other devices.
• Therefore both statements are true and the Reason correctly explains the Assertion.
వివరణ:
Question 20
ప్రశ్న 20
A computer reads two numbers, stores them temporarily, adds them and displays the sum. Which sequence best represents the involvement of the major functional units?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• The numbers first enter through the Input Unit.
• They may be held in memory while the CPU performs the required arithmetic operation.
• The resulting sum is then sent through the Output Unit, giving Input Unit → Memory Unit → CPU → Output Unit.
• They may be held in memory while the CPU performs the required arithmetic operation.
• The resulting sum is then sent through the Output Unit, giving Input Unit → Memory Unit → CPU → Output Unit.
వివరణ:
Answer Key సమాధానాల పట్టిక
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Question 1 ప్రశ్న 1Answer: D. Control Unit సమాధానం: D.
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Question 2 ప్రశ్న 2Answer: B. To accept data and instructions and convert them into a form usable by the computer సమాధానం: B.
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Question 3 ప్రశ్న 3Answer: A. (a)-3, (b)-1, (c)-4, (d)-2 సమాధానం: A.
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Question 4 ప్రశ్న 4Answer: C. Input → Processing → Storage → Output సమాధానం: C.
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Question 5 ప్రశ్న 5Answer: B. It can hold data, instructions, intermediate results and processed information as required. సమాధానం: B.
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Question 6 ప్రశ్న 6Answer: D. Both A and R are true, and R is the correct explanation of A. సమాధానం: D.
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Question 7 ప్రశ్న 7Answer: C. 1, 2 and 3 only సమాధానం: C.
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Question 8 ప్రశ్న 8Answer: A. Arithmetic Logic Unit సమాధానం: A.
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Question 9 ప్రశ్న 9Answer: D. The ALU is primarily responsible for accepting raw data directly from all external input devices. సమాధానం: D.
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Question 10 ప్రశ్న 10Answer: C. Printing the receipt సమాధానం: C.
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Question 11 ప్రశ్న 11Answer: B. Control Unit సమాధానం: B.
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Question 12 ప్రశ్న 12Answer: A. Arithmetic Logic Unit సమాధానం: A.
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Question 13 ప్రశ్న 13Answer: C. (a)-4, (b)-1, (c)-3, (d)-2 సమాధానం: C.
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Question 14 ప్రశ్న 14Answer: D. The Control Unit coordinates instruction execution, whereas the ALU performs arithmetic and logical operations. సమాధానం: D.
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Question 15 ప్రశ్న 15Answer: A. Input → ALU processing → Output సమాధానం: A.
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Question 16 ప్రశ్న 16Answer: B. Input Unit, ALU, Control Unit, Output Unit సమాధానం: B.
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Question 17 ప్రశ్న 17Answer: A. Retaining data, instructions or results so that they can be used or retrieved later సమాధానం: A.
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Question 18 ప్రశ్న 18Answer: C. 1, 2, 3 and 4 సమాధానం: C.
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Question 19 ప్రశ్న 19Answer: D. Both A and R are true, and R is the correct explanation of A. సమాధానం: D.
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Question 20 ప్రశ్న 20Answer: B. Input Unit → Memory Unit → CPU → Output Unit సమాధానం: B.