Question Discussion & Solution

As the total distance between A and G is equal to E and D i.e. 20 km. So BD = 20 – (10 + 1) = 9 Km.

Hence, the distance between B and D is 9 km 

There are 4 library functions provided by C defined under header file to facilitate dynamic memory allocation in C programming. They are:

• malloc()
• calloc()
• free()
• realloc()

A storage unit is used to store information and instructions when they are not being used in memory.

Three kinds of storage devices are a flash drive, hard disks, and CD - ROM drives.

Data access time is the time taken by a computer, or a data storage device or medium, to respond to a user's request for data.

Typical access times for a CD-ROM drive, 200 milliseconds; hard drive, 15 milliseconds; Random Access Memory (RAM), 70 nanoseconds.

There is a trade-off among the three key characteristics of memory: namely, capacity, access time, and cost. A variety of technologies are used to implement memory systems, and across this spectrum of technologies, the following relationships hold:

• Faster access time, greater cost per bit
• Greater capacity, smaller cost per bit
• Greater capacity, slower access time

The correct answer is Banded Column.

• Banded Column is used in Ms-Word to make the formatting of even columns different from subject columns.

Key Points

• Banded Column 
  • ​Adding colour to alternate columns.
  • Banded columns are available in the Design tab.
  • Excel’s Conditional Formatting feature allows us to apply cell shading to every other row in a worksheet.
• • By selecting the range we want to apply banded columns, and then click Conditional Formatting > New Rule under Home tab.
  • For applying banded columns, we can use this formula =MOD(COLUMN(),2)=0.

​Additional Information

• Banding
  • Adding colour to alternate rows or columns called banding.
  • It can make the data in our worksheet easier to scan. 
• Banded rows
  • The term banded rows are referring to the shading of alternating rows in a worksheet.
  • Excel’s Conditional Formatting feature allows us to apply cell shading to every other row in a worksheet.

The correct answer is Sodium carbonate.

Key Points

• A toothpaste is defined as a semi-solid material for removing naturally occurring deposits from teeth and is supposed to be used simultaneously with a toothbrush.
• Toothpaste generally contains the following components:
  • Water (20–40%)
  • Abrasives (50%) including aluminum hydroxide, calcium hydrogen phosphates, calcium carbonate, magnesium carbonate, silica, and hydroxyapatite.
  • Fluoride (usually 1450 ppm) mainly in the form of sodium fluoride.