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Classification of Hardware, Software, and Firmware MCQs

Prepare for Classification of Hardware, Software, and Firmware MCQs with verified questions, past-paper solutions, and conceptual explanations for CSS, PMS, FPSC, PPSC, and NTS examinations.

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Topic Notes: Computer Science

These notes summarize the key preparation context before you attempt the MCQs. Review the topic focus, then practice the questions below with answers and explanations.

Quick Overview

Practice Computer Science MCQs to prepare for CSS, PMS, FPSC, PPSC, SPSC, KPPSC, BPSC, NTS, and university entry tests in Pakistan. This section covers key theoretical concepts, syllabus topics, and repeated past paper questions related to Computer Science.

Topic-Wise Breakdown
Structured subject modules organized by difficulty and exam frequency.
Verified Answer Keys
Detailed explanations cross-referenced with standard textbooks and commission keys.
Complete Coverage
Covers fundamental definitions, advanced problem-solving, and recent exam trends.

How to Prepare Computer Science MCQs for Competitive Exams

Review each sub-topic systematically. Start with fundamental concepts, practice multiple-choice question sets under timed conditions, and note down questions you missed in your revision tracker. Select a specific topic from the list below to begin practice.

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1501
In what ratio must water be mixed with milk costing Rs. 16 per liter to obtain a mixture worth Rs. 12 per liter?
1502
A dishonest milkman mixes water with milk costing Rs. 20 per liter to make a profit of 25% by selling the mixture at cost price. What is the ratio of milk to water?
1503
A vessel is filled with liquid, 3 parts of which are water and 5 parts syrup. How much of the mixture must be drawn off and replaced with water so that the mixture may be half water and half syrup?
1504
How many liters of a 30% alcohol solution must be mixed with 20 liters of a 60% alcohol solution to get a 40% solution?
1505
A mixture contains milk and water in the ratio 5:1. On adding 5 liters of water, the ratio becomes 5:2. What is the quantity of milk in the mixture?
1506
A merchant has 1000 kg of sugar, part of which he sells at 8% profit and the rest at 18% profit. He gains 14% on the whole. What is the quantity sold at 18% profit?
1507
A mixture of 40 liters of milk and water contains 10% water. How much water must be added to make the water content 20%?
1508
Two alloys contain copper and zinc in ratios 1:3 and 2:2 respectively. If equal quantities of these alloys are mixed, what is the ratio of copper to zinc in the new alloy?
1509
A container holds 50 liters of pure alcohol. 10 liters are removed and replaced with water. If this is done again, what is the final concentration of alcohol?
1510
How many kilograms of sugar costing Rs. 45 per kg must be mixed with 25 kg of sugar costing Rs. 50 per kg so that the mixture may be sold at Rs. 48 per kg?