Question Discussion & Solution

The first two statements give information about payal, monika and Sonam. Information about kunal and monika cannot be determined.

Concept:

Software maintenance:

Any changes done in the software during its execution such as error correction, optimization etc. is software maintenance. Its objective is to preserve the value of software over time.

Explanation:

Types of software maintenance are:

Perfective maintenance: when there are new requirements from user side, then at that time changes made in the software is known as perfective maintenance. It makes the software more enhanced, clean structured, better than previous.

Adaptive maintenance: Changes done in the software environment that includes any work initiated as consequence of moving the software to different hardware or software is known as adaptive maintenance.

Preventive maintenance: It prevent software from future problems.

The correct answer is Desert Climate.

Key Points

• According to Tharnwet, Rajasthan has four climate region-
  •  CA'w-
    • This climate region is similar to the subhumid/arid and wet-dry region.
    • Rajasthan's Udaipur, Dungarpur, Banswara, Kota, Baran, Jhalawar districts come in this region.
    • Sawana and Monsoon type flora is found in this region.
  • DA'w-
    • This climate region is similar to the semi-arid/tropical-wet climate region.
    • Rajasthan's  Barmer, Jodhpur, Churu, Jalore, Pali, Ajmer, Bundi, Sawai Madhopur districts come in this region.
    • Semi-desert flora is found in this region.
  • DB'w-
    • This climate region is similar to the mid thermal semi-dry/mixed climate region.
    • Rajasthan's Ganganagar, Hanumangarh, Bikaner, Churu districts come in this region.
    • Thorny bushes and semi-desert flora is found in this region.
  • EA'd-
    • This climate region is similar to the Desert climate region.
    • Rajasthan's Jaisalmer, Western Jodhpur, South-West Bikaner, North-West Barmer come in this region.
    • Desert flora is found in this region

Concept:

Latent heat: It is the amount of heat needed to change the state of a unit mass of any substance without changing its temperature.

i.e., we can say that heat needed to supply for changing its state will be directly proportional to the mass m of the substance.

∴Q ∝ m

i.e.,Q = mL

The SI unit of Latent heat is J/Kg and the CGS unit is Cal/g respectively.

Where,

m = mass of an object

L = Latent heat

Q = amount of heat needed to change the state of matter of mass m 

Explanation:

From the above explanation, we can see that Amount of heat needed to melt a unit mass of a substance is directly proportional to the amount of mass of an object since the Latent heat of a material is constant.

i.e., Q ∝ m ⇒ Q = mL

Thus the unit of latent heat can be expressed as \(L=\frac{Q}{m}\Rightarrow L=\frac{Joules}{kg}\)

The correct answer is 16%.

• The Tourism sector contributes about 16% to the total economy of Rajasthan.

Key Points

• Tourism in Rajasthan:
  •