new syllabus

Troubleshooting Solve Exercise | 9th Class Computer Science New Syllabus

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Looking for solutions to the troubleshooting exercises in the 9th class Computer Science new syllabus? Get detailed answers with easy explanations, step-by-step solutions, and examples to help you understand troubleshooting concepts better.

1. What is the first step in the systematic process of troubleshooting?

Statement: What is the first step in the systematic process of troubleshooting?

Options:
A) Establish a Theory of Probable Cause
B) Implement the Solution
C) Identify Problem
D) Document Findings, Actions, and Outcomes

Correct Answer: C) Identify Problem

Explanation:
Troubleshooting starts with identifying the exact issue before trying to fix anything. This involves gathering information about the problem, asking users about symptoms, and checking error messages.

🔹 Tip & Trick: Always start by diagnosing the problem before jumping to solutions.

2. Why is effective troubleshooting important for maintaining systems?

Statement: Why is effective troubleshooting important for maintaining systems?

Options:
A) It helps save money on repairs
B) It prevents the need for professional help
C) It ensures systems operate smoothly and efficiently
D) It allows for more frequent system updates

Correct Answer: C) It ensures systems operate smoothly and efficiently

Explanation:
Proper troubleshooting helps maintain system stability and prevents unexpected failures, ensuring smooth operation.

🔹 Tip & Trick: Regular troubleshooting prevents downtime and keeps systems efficient.

3. Which step involves coming up with a theory about what might be causing a problem?

Statement: Which step involves coming up with a theory about what might be causing a problem?

Options:
A) Test the Theory to Determine the Cause
B) Establish a Theory of Probable Cause
C) Implement the Solution
D) Verify Full System Functionality

Correct Answer: B) Establish a Theory of Probable Cause

Explanation:
After identifying the problem, the next step is to think of possible reasons for the issue. This step helps in narrowing down potential causes.

🔹 Tip & Trick: Think of multiple possible causes before testing a solution.

4. After implementing a solution, what is the next step in the troubleshooting process?

Statement: After implementing a solution, what is the next step in the troubleshooting process?

Options:
A) Document Findings, Actions, and Outcomes
B) Test the Theory to Determine the Cause
C) Verify Full System Functionality
D) Establish a Plan of Action to Resolve the Problem

Correct Answer: C) Verify Full System Functionality

Explanation:
After applying a fix, it is important to check if the problem is truly resolved and that no new issues have arisen.

🔹 Tip & Trick: Always test the system after troubleshooting to ensure everything works correctly.

5. Which of the following is an example of identifying a problem in troubleshooting?

Statement: Which of the following is an example of identifying a problem in troubleshooting?

Options:
A) Testing a laptop battery by plugging in the power cord
B) Coming up with a plan to replace a laptop battery
C) Noticing that a laptop does not turn on when the power button is pressed
D) Writing down that a laptop battery was replaced

Correct Answer: C) Noticing that a laptop does not turn on when the power button is pressed

Explanation:
Identifying a problem means observing symptoms and recognizing that something is wrong. In this case, noticing that the laptop doesn’t turn on is identifying the problem.

🔹 Tip & Trick: Observation is key in troubleshooting—look for symptoms first!

6. Why is documenting findings, actions, and outcomes important in troubleshooting?

Statement: Why is documenting findings, actions, and outcomes important in troubleshooting?

Options:
A) It helps solve problems faster
B) It provides a record for future reference
C) It allows for more efficient testing
D) It ensures that the system is configured correctly

Correct Answer: B) It provides a record for future reference

Explanation:
Documenting troubleshooting steps ensures that if the problem happens again, there is a record of what was done to fix it. This saves time and effort in the future.

🔹 Tip & Trick: Always keep records of troubleshooting steps for easier fixes in the future!

7. What is the purpose of establishing a plan of action in troubleshooting?

Statement: What is the purpose of establishing a plan of action in troubleshooting?

Options:

A) To identify the problem
B) To verify full system functionality
C) To determine the cause of the problem
D) To decide on the steps needed to resolve the issue

Correct Answer:

✅ D) To decide on the steps needed to resolve the issue

Explanation:

After identifying the problem and its possible causes, the next step is to plan how to fix it. This ensures an organized and effective approach to problem-solving.

🔹 Tip & Trick: Always create a step-by-step plan before applying any fix to avoid mistakes.

Keywords: troubleshooting, plan of action, problem-solving, system repair

8. Why is troubleshooting important in computing systems?

Statement: Why is troubleshooting important in computing systems?

Options:

A) It ensures hardware components are always up to date
B) It prevents the need for data backups
C) It helps keep systems running smoothly and securely
D) It eliminates the need for software updates

Correct Answer:

✅ C) It helps keep systems running smoothly and securely

Explanation:

Regular troubleshooting prevents system failures, security issues, and performance problems, ensuring that everything operates efficiently.

🔹 Tip & Trick: Proper troubleshooting saves time and money by preventing major system failures.

Keywords: troubleshooting, system security, maintenance, smooth operation

9. What does troubleshooting help prevent by quickly identifying and resolving issues?

Statement: What does troubleshooting help prevent by quickly identifying and resolving issues?

Options:

A) The need for professional help
B) The need for software updates
C) Downtime and lost productivity
D) The need for regular maintenance

Correct Answer:

✅ C) Downtime and lost productivity

Explanation:

When issues are identified and fixed quickly, systems remain functional, reducing downtime and ensuring productivity.

🔹 Tip & Trick: Faster troubleshooting reduces losses and keeps work running smoothly.

Keywords: downtime, lost productivity, troubleshooting, quick fixes

10. Which of the following is an example of ensuring data integrity through troubleshooting?

Statement: Which of the following is an example of ensuring data integrity through troubleshooting?

Options:

A) Identifying a software bug that causes incorrect database results
B) Replacing a faulty printer
C) Using a cooling pad to prevent laptop overheating
D) Updating the operating system regularly

Correct Answer:

✅ A) Identifying a software bug that causes incorrect database results

Explanation:

Ensuring data integrity means making sure information remains accurate and reliable. Fixing software bugs prevents data corruption and ensures correctness.

🔹 Tip & Trick: Always double-check data accuracy after troubleshooting software issues.

Keywords: data integrity, software bug, database, accuracy, troubleshooting

Short Question Answers (Easy and Simple for Class 9 Students)

1. What is the first step in the systematic process of troubleshooting, and why is it important?

✅ Answer: The first step in troubleshooting is identifying the problem. This is important because without knowing what is wrong, it is impossible to fix the issue.

🔹 Example: If a computer is not turning on, we first check whether the power cable is connected properly before moving to complex solutions.

Keywords: troubleshooting, identifying problems, first step

2. After identifying a problem, what is the next step in troubleshooting, and how does it help in resolving the issue?

✅ Answer: After identifying a problem, the next step is to establish a theory of probable cause. This means guessing possible reasons why the issue is happening.

🔹 Example: If a computer is overheating, the possible cause could be dust blocking the cooling fan.

🔹 How it helps: It narrows down possible solutions, making troubleshooting faster and more effective.

Keywords: problem identification, troubleshooting process, probable cause

3. Describe the importance of testing a theory during the troubleshooting process. Provide an example.

✅ Answer: Testing a theory means checking if the guessed cause of the problem is correct before applying a solution. It helps in avoiding unnecessary changes and ensures the real problem is fixed.

🔹 Example: If a phone is not charging, we test different chargers to see if the problem is with the charger or the phone’s charging port.

Keywords: testing theories, troubleshooting, verifying causes

4. Explain what the “Implement the Solution” step entails in troubleshooting.

✅ Answer: The “Implement the Solution” step means applying the fix that was chosen to solve the problem.

🔹 Example: If a printer is not working and the issue is identified as an empty ink cartridge, the solution would be to replace the cartridge.

🔹 Why it’s important: This step actually resolves the problem and restores system functionality.

Keywords: implement solution, troubleshooting, fixing problems

5. Why is it necessary to verify full system functionality after implementing a solution?

✅ Answer: After fixing a problem, it is important to check if the entire system is working properly to ensure that the issue is completely resolved and nothing else is affected.

🔹 Example: If a computer had a virus and we removed it, we must check if all files and programs are still working correctly.

🔹 Why it’s important:

  • It confirms that the solution worked.
  • It prevents new issues from appearing.
  • It ensures the system is fully operational.

Keywords: verify functionality, troubleshooting, system check, problem-solving

Long Question Answers (Easy & Well-Explained)

1. Discuss the importance of troubleshooting in maintaining the smooth operation of systems, especially computing systems.

✅ Answer:
Troubleshooting is an essential process in fixing problems in computers and other systems. It helps maintain smooth operations by identifying and resolving issues before they cause major failures.

🔹 Why Troubleshooting is Important:

  1. Prevents System Failures – Regular troubleshooting detects small issues before they turn into big problems.
  2. Saves Time & Money – Fixing problems early reduces repair costs and prevents work delays.
  3. Ensures Security – Identifying security threats protects important data.
  4. Improves Performance – Fixing software bugs and errors makes the system run faster.

🔹 Example: If a laptop is slow, troubleshooting can help find out if the problem is low storage, overheating, or a virus.

Keywords: troubleshooting, system maintenance, performance, security, efficiency

2. Explain the systematic process of troubleshooting. Describe each step in detail.

✅ Answer:
The troubleshooting process involves logical steps to find and fix problems.

🔹 Steps of Troubleshooting:

  1. Identify the Problem – Observe symptoms and ask questions to understand the issue.
  2. Establish a Theory of Probable Cause – Guess the possible reasons for the problem.
  3. Test the Theory – Check if the guessed cause is correct by performing tests.
  4. Establish a Plan of Action – Decide on steps to fix the issue.
  5. Implement the Solution – Apply the fix to solve the problem.
  6. Verify Full System Functionality – Check if everything is working properly.
  7. Document Findings, Actions, and Outcomes – Write down what was done to fix the issue for future reference.

🔹 Example: If Wi-Fi is not working, the steps would be:

  1. Check if the router is on (Identify Problem)
  2. Check if cables are loose (Establish Theory)
  3. Test with another device (Test Theory)
  4. Restart router (Plan of Action)
  5. Restart and check if Wi-Fi works (Implement Solution)
  6. Test speed on different devices (Verify Functionality)
  7. Note the steps for future reference (Document Findings)

Keywords: troubleshooting process, problem-solving, fixing issues, Wi-Fi, computing

3. Case Study: Troubleshooting a Printer That is Not Printing

✅ Answer:
🔹 Step 1: Identify the Problem

  • The printer is not printing documents.

🔹 Step 2: Establish a Theory of Probable Cause

  • Possible reasons:
    1. Printer is not connected to the computer.
    2. Printer is out of ink or paper.
    3. Printer drivers are not installed.

🔹 Step 3: Test the Theory

  • Check if the printer is turned on and properly connected.
  • Print a test page.
  • Open printer settings to check for errors.

🔹 Step 4: Establish a Plan of Action

  • If the printer is not connected, reconnect it.
  • If it is out of ink/paper, refill it.
  • If drivers are missing, install them.

🔹 Step 5: Implement the Solution

  • Apply the selected fix.

🔹 Step 6: Verify Full Functionality

  • Print a sample document to check if the issue is resolved.

🔹 Step 7: Document the Findings

  • Note down the problem and solution for future reference.

Keywords: printer troubleshooting, connectivity issues, drivers, printing errors

4. Importance of Documenting Findings, Actions, and Outcomes in Troubleshooting

✅ Answer:
Documentation means writing down the steps taken during troubleshooting.

🔹 Why It’s Important:

  1. Helps in Future Fixes – If the same issue happens again, you can refer to past solutions.
  2. Saves Time – No need to start from scratch when the problem occurs again.
  3. Useful for Others – Other people can use the documentation to solve similar issues.
  4. Creates a Record – Helps in tracking system performance.

🔹 Example:
If a school computer stops working, and the technician documents the fix, next time another teacher can follow the same steps.

Keywords: documentation, troubleshooting records, system maintenance, time-saving

5. How Troubleshooting Prevents Downtime, Ensures Data Integrity & Improves Security

✅ Answer:
Troubleshooting is essential in computing to keep systems efficient, safe, and functional.

🔹 How Troubleshooting Helps:

  1. Prevents Downtime – Fixing errors quickly keeps businesses, schools, and offices running smoothly.
  2. Ensures Data Integrity – Identifies and fixes data corruption issues.
  3. Improves Security – Detects and removes malware, viruses, and cyber threats.

🔹 Example: If a bank’s server crashes, troubleshooting helps restore services quickly to avoid customer issues.

Keywords: troubleshooting, downtime prevention, data protection, cybersecurity

6. Software Troubleshooting Strategies

✅ Answer:
🔹 Common Software Issues & Fixes:

  • Application Freezing: Restart the app or update the software.
  • Unresponsive Peripherals: Reconnect devices, check drivers, or restart the system.

🔹 Example: If Microsoft Word is not responding, restarting it or reinstalling the software can fix the problem.

Keywords: software troubleshooting, app freezing, device issues

7. Recognizing Hardware Failures (RAM & Hard Drive Issues)

✅ Answer:
🔹 Signs of RAM Failure:

  • Computer crashes frequently.
  • Blue screen errors.

🔹 Signs of Hard Drive Failure:

  • Files disappearing or getting corrupted.
  • Computer taking too long to boot.

🔹 Fixes:

  • For RAM Issues: Replace faulty RAM.
  • For Hard Drive Issues: Backup data and replace the hard drive.

Keywords: RAM failure, hard drive issues, hardware troubleshooting

8. Importance of Software Maintenance & Security

✅ Answer:
Regular software maintenance helps fix bugs, improve performance, and protect against security threats.

🔹 Security Measures:

  • Keep software updated to fix vulnerabilities.
  • Use antivirus software to protect against malware.
  • Avoid downloading from untrusted sources.

Keywords: software updates, cybersecurity, maintenance

9. Identifying & Removing Malware + Applying OS Updates

✅ Answer:
🔹 Identifying Malware:

  • Slow performance, pop-ups, unknown apps.

🔹 Removing Malware:

  • Use antivirus software to scan and remove threats.

🔹 Applying OS Updates:

  • Updates fix security holes and improve performance.

Keywords: malware removal, OS updates, antivirus

10. Data Backup Methods

✅ Answer:
🔹 Backup Options:

  • External Storage: USB, external hard drives.
  • Cloud Storage: Google Drive, OneDrive.

🔹 Why Backup is Important:

  • Protects against data loss.
  • Ensures recovery in case of hardware failure.

Keywords: data backup, cloud storage, external drives

Solved Exercise of Chapter 5: Turning Effect of Force | Physics Class 9th

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Get the solved exercise of Chapter 5, Turning Effect of Force, for Physics Class 9th based on the new syllabus. Tailored for Punjab Board and Lahore Board students, this comprehensive guide will help you ace your exams.

4.1

Statement: A particle is simultaneously acted upon by two forces of 4 and 3 newtons. The net force on the particle is:
Options:
(a) 1 N
(b) Between 1 N and 7 N
(c) 5 N
(d) 7 N
Answer: (c) 5 N
Explanation: The net force is calculated using the Pythagorean theorem since the forces are perpendicular: Fnet=√42+32=√16+9=√25=5 

Tips and Tricks: Use the Pythagorean theorem for forces acting at right angles. The formula is Fnet=√F12+F22

4.2

Statement: A force FF is making an angle of 60∘ with the x-axis. Its y-component is equal to:
Options:
(a) F
(b) Fsin⁡60∘
(c) Fcos⁡60∘
(d) Ftan⁡60∘
Answer: (b) Fsin⁡60∘
Explanation: The y-component of a force is calculated as Fy=Fsin⁡θ. Substituting θ=60∘, the y-component becomes Fsin⁡60∘F .
Tips and Tricks: Memorize the formulas for components of force:

  • Fx=Fcos⁡θ
  • Fy=Fsin⁡θ

4.3

Statement: Moment of force is called:
Options:
(a) Moment arm
(b) Couple
(c) Couple arm
(d) Torque
Answer: (d) Torque
Explanation: The moment of force about a point is known as torque, which is the product of force and perpendicular distance. Formula: τ=F×r
Tips and Tricks: Torque is also referred to as the rotational equivalent of force.

4.4

Statement: If F and r are the forces acting on a body and τ is the torque produced in it, the body will be completely in equilibrium under:
Options:
(a) ΣF=0 and Στ= 0
(b) ΣF=0 or Στ= 0
(c) ΣF≠0 and Στ= 0
(d) ΣF=0 and Στ≠0
Answer: (a) ΣF=0 and Στ= 0
Explanation: For a body to be in equilibrium, both the net force and the net torque acting on it must be zero.
Tips and Tricks: Equilibrium conditions:

  • Translational equilibrium: ΣF= 0
  • Rotational equilibrium: Στ = 0.

4.5

Statement: A shopkeeper sells his articles by a balance having unequal arms of the pans. If he puts the weights in the pan having a shorter arm, then the customer:
Options:
(a) Loses
(b) Gains
(c) Neither loses nor gains
(d) Not certain
Answer: (a) Loses
Explanation: When weights are placed on the shorter arm, the force produced is smaller, leading to an imbalance that favors the shopkeeper.
Tips and Tricks: Analyze the torque balance when arms are unequal: τ=F×r.

4.6

Statement: A man walks on a tight rope. He balances himself by holding a bamboo stick horizontally. It is an application of:
Options:
(a) Law of conservation of momentum
(b) Newton’s second law of motion
(c) Principle of moments
(d) Newton’s third law of motion
Answer: (c) Principle of moments
Explanation: The man uses the bamboo stick to shift his center of gravity and balance the moments on either side of the rope.
Tips and Tricks: Recall that balancing requires the moments about a pivot to be equal.

4.7

Statement: In the stable equilibrium, the center of gravity of the body lies:
Options:
(a) At the highest position
(b) At the lowest position
(c) At any position
(d) Outside the body
Answer: (b) At the lowest position
Explanation: In stable equilibrium, the body’s center of gravity is at the lowest point to maintain maximum stability.
Tips and Tricks: Stability depends on the position of the center of gravity: lower is more stable.

4.8

Statement: The center of mass of a body:
Options:
(a) Lies always inside the body
(b) Lies always outside the body
(c) Lies always on the surface of the body
(d) May lie within, outside, or on the surface
Answer: (d) May lie within, outside, or on the surface
Explanation: The center of mass depends on the distribution of mass. For example:

  • A uniform solid has its center of mass within the body.
  • A hollow sphere can have its center of mass outside the material body.
    Tips and Tricks: Think about examples like rings or irregularly shaped bodies to determine the center of mass.

4.9

Statement: A cylinder resting on its circular base is in:
Options:
(a) Stable equilibrium
(b) Unstable equilibrium
(c) Neutral equilibrium
(d) None of these
Answer: (a) Stable equilibrium
Explanation: When the cylinder is slightly disturbed, it will return to its original position because its center of gravity remains low and stable.
Tips and Tricks: Objects with a broad base and low center of gravity are usually in stable equilibrium.

4.10

Statement: Centripetal force is given by:
Options:
(a) rF
(b) rFcos⁡θ
(c) mv2/r
(d) mv/r
Answer: (c) mv2/r
Explanation: Centripetal force is the force required to keep an object moving in a circular path, given by the formula: Fc=mv2/r

where mm is the mass, vv is the velocity, and rr is the radius of the circular path.
Tips and Tricks: Memorize the formula for centripetal force. It directly depends on the mass and velocity squared and inversely on the radius.

Short Answer Questions

4.1 Define like and unlike parallel forces.
Answer:

  • Like parallel forces: Forces acting in the same direction along parallel lines.
  • Unlike parallel forces: Forces acting in opposite directions along parallel lines.

4.2 What are rectangular components of a vector and their values?
Answer:
Rectangular components of a vector are the projections of the vector along mutually perpendicular axes (usually x and y).

  • Vx=Vcos⁡θ
  • Vy=Vsin⁡θ

4.3 What is the line of action of a force?
Answer:
The line of action of a force is an imaginary line that extends along the direction of the force. It determines the point of application and the torque produced by the force.

4.4 Define moment of force. Prove that τ=Fsin⁡θ, where θ\theta is the angle between r and F.
Answer:

  • Definition: The moment of a force (or torque) is the measure of its ability to rotate an object about an axis or a point.
  • Proof:
    Torque (τ\tau) is given by the formula:

τ=r×F=rFsin⁡θ

where r is the perpendicular distance from the axis of rotation, F is the applied force, and θ is the angle between r and F.

4.5 With the help of a diagram, show that the resultant force is zero but the resultant torque is not zero.
Answer:
Draw a diagram where two equal and opposite forces are acting on a body (e.g., a rectangular body). The forces cancel each other out, resulting in ΣF=0. However, since these forces do not share the same line of action, they produce a couple, resulting in τ≠0.

4.6 Identify the state of equilibrium in the given figure.
Answer:
(a) Stable equilibrium (the cone on its base)
(b) Neutral equilibrium (sphere on a flat surface)
(c) Unstable equilibrium (cylinder on its curved surface).

Constructed Response Questions

4.1 A car travels at the same speed around two curves with different radii. For which radius does the car experience more centripetal force? Prove your answer.
Answer:

  • Formula: Centripetal force Fc=mv2/r
  • When v (velocity) and m (mass) are constant, Fc is inversely proportional to rr.
  • For the smaller radius, Fc is larger because r is smaller.
  • Proof: Assume two radii r1<r2r_1 < r_2, then:

Fc1=mv2/r1>Fc2=mv2/r2

4.2 A ripe mango does not normally fall from the tree. But when the branch of the tree is shaken, the mango falls down easily. Can you tell the reason?
Answer:
The mango remains stationary due to inertia. When the branch is shaken, the inertia of the mango resists the motion of the branch, causing the mango to lose its support and fall due to gravity.

4.3 Discuss the concepts of stability and center of gravity in the context of objects toppling over. Provide an example where an object’s center of gravity affects its stability.
Answer:

  • Stability: An object is stable if its center of gravity lies within its base of support.
  • Toppling: If the line of action of weight (passing through the center of gravity) falls outside the base of support, the object topples.
  • Example: A tall, narrow vase is less stable compared to a wide, flat vase because its center of gravity is higher and more likely to shift outside the base.

Short Questions

4.4 Why an accelerated body cannot be considered in equilibrium?
Answer:
An accelerated body is not in equilibrium because:

  1. In equilibrium, the net force (ΣF) and net torque (Στ) acting on the body must be zero.
  2. An accelerated body has a non-zero net force (F=ma), which violates the equilibrium condition.

4.5 Two boxes of the same weight but different heights are lying on the floor of a truck. If the truck makes a sudden stop, which box is more likely to tumble over? Why?
Answer:
The taller box is more likely to tumble over because it has a higher center of gravity.

  • When the truck stops suddenly, inertia causes the box to tilt.
  • A higher center of gravity increases the chance of the line of action of weight moving outside the base of support, leading to toppling.

Comprehensive Questions

4.1 Explain the principle of moments with an example.
Answer:

  • Principle of Moments: For a body to be in rotational equilibrium, the sum of clockwise moments must equal the sum of anticlockwise moments about a pivot point:

ΣClockwise moments=ΣAnticlockwise moments

  • Example: A seesaw in balance:
    • If a child of weight W1 sits at a distance d1d_1 from the pivot on one side, and another child of weight W2 sits at d2 on the other side, equilibrium is achieved when:

W1×d1=W2×d2

4.2 Describe how you could determine the center of gravity of an irregular-shaped lamina experimentally.
Answer:

  1. Suspend the irregular lamina freely from one point.
  2. Use a plumb line to draw a vertical line along the lamina from the suspension point.
  3. Suspend the lamina from another point and repeat the process.
  4. The intersection of the lines is the center of gravity.

4.3 State and explain two conditions of equilibrium.
Answer:

  • Translational Equilibrium:
    The net force acting on the body is zero (ΣF=0).
    • Example: A book resting on a table where gravitational force is balanced by the normal force.
  • Rotational Equilibrium:
    The net torque acting on the body is zero (Στ=0).
    • Example: A balanced beam on a fulcrum where clockwise and anticlockwise torques are equal.

4.4 How the stability of an object can be improved? Give a few examples to support your answer.
Answer:
Ways to Improve Stability:

  1. Lower the center of gravity: The closer the center of gravity is to the base, the more stable the object.
    • Example: Racing cars have low centers of gravity for stability at high speeds.
  2. Widen the base of support: A broader base increases stability by making it harder for the center of gravity to shift outside the base.
    • Example: Tripods have wide bases to prevent tipping.
  3. Add weight near the base: Heavier bases prevent toppling.
    • Example: Tall structures like towers have heavy foundations.
  4. Align weight along the base: Ensure the line of action of weight remains within the base of support.
    • Example: A gymnast balances carefully to maintain stability.

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