Question Discussion & Solution

The correct answer is 1024 megabytes

The size of information in the computer is measured in Kilobytes (KB), Megabytes (MB), Gigabytes (GB), and Terabytes (TB).

• 1 Kilobyte (KB) = about 1 thousand bytes (or 1024 bytes to be precise)
• One Megabyte (MB) is about 1 million bytes (or about 1024 Kilobytes (KB)).
• One Gigabyte (GB) is about 1 billion bytes, or (1024 Megabytes MB).
• One Terabyte (TB) is about roughly 1 trillion bytes or 1024 gigabytes (GB).

Stack

• It is a Last In First Out (LIFO) data structure
• Piles is another name used for stack since data element are placed one above the other and last element on the pile is the first one to be removed (LIFO)

• Push-down list: A list in which the next item to be removed is the item most recently stored (LIFO); Stack is a LIFO data structure
• The stack is used in situations where data have to be stored and then retrieved in reverse order.
• Real-life implementation of the stack is shown:

The ball which is stored last (D) will be the first one to be taken out of the container

Important Points

• Stacks data structures are also called FILO (first in last out)
• push(), pop(), peek() are some of the functions of stack data structure

Concept:

​Simple Pendulum:

• A simple pendulum consists of a small metallic ball or a piece of stone suspended from a rigid stand by a thread.
  The metallic ball is called Bob.
• A pendulum swings from one extreme position to another and comes back to the same position, this completes one oscillation. 
• One oscillation can also be defined as the pendulum starting from the mean position, going to one extreme, and coming back to the same mean position. 
• The time duration to compete for one oscillation is called time period and the is reciprocal of time period is frequency. 
• Frequency: The number of oscillations per unit time is called frequency. 

\(frequncy =\frac{Oscillation}{Time}\)

Calculation:

Given that : Frequency = 2 hz and time = 16 sec.

In a sec pendulum completes 2 oscillations per second.

⇒ Oscillations = Frequency × time

⇒ Oscillations = 2×16

⇒ Oscillations = 32

Additional Information

The time period of a simple pendulum depends upon on the length of the string and acceleration due to gravity.

\(T = 2 \pi \sqrt{\frac{l}{g}}\)

l is length, g is acceleration due to gravity. 

• The Hydrogen present in acids is responsible for their acidic behaviour.
• An acidic substance donates its H⁺ ions in aqueous solution which causes an imbalance of H⁺ and OH^- ions concentration and make the overall solution acidic.

Basic:

• The Hydroxide ions present in bases is responsible for their basic behaviour.
• A basic substance donates its OH^- ions in aqueous solution which causes an imbalance of H⁺ and OH^- ions concentration and makes the overall solution basic.

The correct answer is China.

Key Points

• The Russia and China joint naval exercises “Joint Sea 2021” has kicked off at Russia’s Peter the Great Gulf, in the Sea of Japan, on October 14, 2021.
• The exercises will culminate on October 17, 2021.
• The drill is being carried out as part of ‘Joint Sea’ 2021, the series of bilateral naval exercises that have been taking place between the two services since 2012.

Additional Information

•  Important Exercises between India and other countries: