Question Discussion & Solution

The correct answer is Sulphur.

• The sulphur is the eye irritating compound that is released when cutting onions.
• The syn-Propanethial-S-oxide is the chemical irritant produced by an onion.
• This chemical stimulates the eyes' lachrymal glands which release tears.
• Previously scientists used to blame enzyme alinase for the instability of substances in a cut onion.
• In 2002, a study in Japan proved that lachrymatory factor synthase is responsible for irritation of the eyes.

The correct answer is Wheat.

Key Points

Concept-

• A wide range of fungal, bacterial, and viral pathogens, affect the yield of cultivated crop species, especially in tropical climates.
• Crop losses can often be significant, up to 20-30 per cent, or sometimes even total.
• In this situation, the breeding and development of cultivars resistant to disease enhance food production.
• This also helps reduce the dependence on the use of fungicides and bacteriocides.

Explanation-

• Resistance of the host plant is the ability to prevent the pathogen from causing disease and is determined by the genetic constitution of the host plant.
• Before breeding is undertaken, it is important to know about the causative organism and the mode of transmission.
• Some of the diseases caused by-
  • Fungi are rusts, e.g., brown rust of wheat, red rot of sugarcane, and late blight of potato.
  • Bacteria – black rot of crucifers.
  • Viruses – tobacco mosaic, turnip mosaic, etc.
• Brown rust of wheat is caused by the fungus Puccinia triticina.

Therefore the brown rust is the disease of wheat.

Additional Information

• Red rot is the disease of sugarcane.
• Late blight is the disease of potatoes.
• Mosaic virus is the disease of turnip.

The correct answer is option 4.

Concept:

CPU Scheduling is a process of determining which process will own CPU for execution while another process is on hold. All Cpu scheduling algorithms use various parameters which are,

Arrival Time: Time at which the process arrives in the ready queue.

Schedule time: Time at which the process arrives ready to running state.

Completion Time: Time at which the process arrives running to terminate state.

Burst Time:  Time spends the process running state.

Turn Around Time:

Turn Around Time= Completion Time – Arrival Time.

Waiting Time:

Waiting time is the total time spent by the process in the ready state waiting for the CPU.

Response time:

Response time is the difference between first execution time and Arrival time.

CPU utilization:

CPU utilization refers to a computer's usage of processing resources or the amount of work handled by a CPU.

Throughput:

Throughput is the amount of work completed in a unit of time.

Throughput = no .of process completed / time taken.

Hence the correct answer is A, B, C, and D.

The correct answer is Single-User Operating System.

Important Points

• Single-User Operating System
  • Performs a single task for Single-user.
  • This operating system is designed to manage the computer so that one user can effectively do one thing at a time.
  • Examples include Microsoft Windows.

Additional Information

• The different types of Operating System:
• Batch Operating System
  • There is no direct communication between the computer and the OS.
  • There is an intermediate, the Operator.
  • The operator distributes the work into batches.
• Real-Time Operating System
  • The processing time is very small between the user’s command and the output such that there is no operator.
• Time-Sharing Operating System
  • Multiple people at various computers can use a program at the same time.
• Distributed Operating System
  • When two or more systems are connected to each other and one can open each other's files.
• Embedded Operating System
  • These special Operating systems are built into larger systems.
  • They are limited to single specific functions like an ATM.
• Network Operating System
  • They have one main server which is connected to other client servers.
  • It provides a secure operating system for working with multiple users.

The correct answer is Article 44.

• Article 44 of the Constitution of India is related to the Uniform Civil Code for the citizens.

Key Points

• Directive Principles of State Policy (DPSP):
  • The Directive Principles of State Policy are described in Articles 36 to 51 in Part IV of the Constitution.
  • They embody the concept of a welfare state.
  • DPSPs are fundamental in the governance of the country.
  • DPSPs are non-equitable.
  • They apply to the Union and State Governments and all other authorities falling within the definition of 'State'.
  • This is a feature borrowed from the Constitution of Ireland.
  • Article 44: To secure a uniform civil code for all citizens throughout the country.

Additional Information

• Article 42: To make provision for just and humane conditions for work and maternity relief.
• Article 45: To provide early childhood care and education for all children until they complete the age of six years.
• Article 40: To organize village Panchayat of function as units of self-government.