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Computer Hardware MCQs for CET 12th Level

Practice 20 free computer hardware multiple choice questions for CET 12th Level exam. Instant answers with explanations in Hindi and English.

Strengthen your Computer Hardware knowledge for CET 12th Level with our free curated MCQ set. Every question follows real Rajasthan exam patterns. Switch between Hindi and English, and practice daily to build confidence before the exam.

CET 12th Level — Computer Hardware

20 Questions • Instant results & explanations • Hindi & English

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Question 1 of 20

Which of the following elements is strictly required for a light pen to function correctly but is NOT required for an optical mouse?

Question 2 of 20

Consider the following statements about Thermal Printers: 1. They require constant replacement of expensive liquid ink cartridges. 2. They operate by using heated pins that make direct contact with specialized paper. 3. They are the industry standard for ATMs and retail POS receipt systems. Which of the statements given above is/are CORRECT?

Question 3 of 20

Assertion (A): Traditional Hard Disk Drives (HDDs) are generally much slower than Solid-State Drives (SSDs) when transferring massive files. Reason (R): HDDs suffer from inherent mechanical rotational latency because physical platters must spin and an actuator arm must physically seek data locations.

Question 4 of 20

Assertion (A): Keyboards have maintained relevance largely because they are unparalleled for Graphical User Interface (GUI) cursor navigation. Reason (R): Keyboards generate unique scan codes that process faster than mouse CMOS images.

Question 5 of 20

Which one of the following is NOT considered an agricultural problem in India?

Question 6 of 20

Consider the following statements regarding the role of Output Devices: 1. They act as an interface by converting human actions into electrical signals. 2. They translate machine-encoded, processed binary data back into human-understandable formats. 3. Physical printouts and acoustic signals are classic examples of output functionality. Which of the above statements is/are INCORRECT?

Question 7 of 20

What completes the 'communication and retention loop' of computing technology, functioning alongside Input and Output Devices?

Question 8 of 20

Consider the following statements regarding the Central Processing Unit (CPU): 1. It is considered the brain of the computer. 2. It temporarily stores data to provide rapid access. 3. It uses the CU to coordinate timing and fetch instructions. 4. It converts binary code back to human-readable form. Which of the statements are correct?

Question 9 of 20

How did older mechanical mice detect X and Y movement?

Question 10 of 20

Which of the following optical storage mediums is specifically architected to utilize a narrower blue-violet laser, thereby achieving massive capacities between 25GB and 100GB?

Question 11 of 20

Consider the following statements regarding projector technologies: 1. LCD projectors work by passing high-intensity light through liquid crystal panels. 2. DLP projectors work by passing high-intensity light through organic LED pixels. 3. DLP projectors utilize microscopic chips containing millions of tiny pivoting mirrors. Which of the statement(s) given above is/are CORRECT?

Question 12 of 20

Assertion (A): Keyboards remain less efficient for Graphical User Interface (GUI) navigation compared to mice. Reason (R): The keyboard lacks the capacity to translate matrix coordinates into standard Unicode characters rapidly.

Question 13 of 20

What is the primary operational difference between a Flatbed plotter and a Drum plotter?

Question 14 of 20

What constitutes the core engineering distinction between PROM and EPROM technologies within the Read-Only Memory family?

Question 15 of 20

Assertion (A): Without Input Devices, a computer system becomes a completely isolated entity. Reason (R): Output Devices alone cannot supply the internal processing units with external machine language commands.

Question 16 of 20

Why is the classification of 'Biometric Sensors' and 'Barcode Readers' grouped identically under the same major category?

Question 17 of 20

Match List-I (Device Category) with List-II (Core Data Translation Role): List-I a. Input Devices b. Output Devices c. Storage Devices List-II 1. Retains massive amounts of digital binary data perfectly intact, performing zero data translation. 2. Translates the internal digital binary operations of the machine outwards into human-understandable analog forms. 3. Converts complex external human actions and analog metrics strictly into digital binary format.

Question 18 of 20

Match the hardware component (List-I) with its core function (List-II): List-I 1. Control Unit (CU) 2. Arithmetic Logic Unit (ALU) 3. RAM 4. HDD/SSD List-II A. Permanent archiving for future use B. Performs mathematical and logical operations C. Provides temporary workspace during processing D. Manages data flow and coordinates timing

Question 19 of 20

Which specific tier of a computer's architecture is uniquely responsible for holding the 'active instructions' that the CPU must fetch and execute instantaneously?

Question 20 of 20

Consider the following statements classifying various hardware devices: 1. Printers act as the primary hard-copy output devices for a computer system. 2. Plotters are classified as primary soft-copy output devices because they utilize digital vectors. 3. Projectors are utilized specifically as visual output devices to display data onto large screens. Which of the statements given above is/are CORRECT?

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