The correct answer is No weight.

Explanation:

• Gravity is a force that attracts a body toward the centre of the earth or any other mass-bearing physical body.

F = mg
where F is force, 
m is mass, and 
g is acceleration due to gravity.

• The weight of an object is the force that attracts it to the earth.
• A body that is free to fall under the influence of gravity is acted upon by the force of gravity.
• However, the object is not exerting any force on any surface. As a result, the weight of object is no weight (zero).

The correct answer is option 1.

Concept:

Wget is a Linux command-line tool that allows us to download files from the internet. Using HTTP, HTTPS, and FTP protocols, we can download files from web servers. Wget is a command that can be used in scripts and cronjobs.

Wget is a non-interactive program that does not require user interaction. One of the useful features of the wget command is that it allows us to download a whole webpage from the internet.

It has the following functions:

• It supports downloading multiple files
• Downloading files in the background
• Resuming previously paused downloads
• Limiting the bandwidth used for downloads
• Viewing headers.

Hence the correct answer is downloading files from the web.

• Structured programming is a programming paradigm aimed at improving the clarity, quality, and development time of a computer program by making extensive use of the structured control flow constructs of selection (if/then/else) and repetition (while, do-while and for), block structures, and subroutines

• C is a structural programming language.

Example of C using loop, do-while and goto statement

goto hello;

                printf("Don't print");

                hello:

                printf("Testbook says: ");

                int i;

                for(i=0;i<1;i++)

                {

                do

                {

                                printf("C is structrue programming language");

                                }

                                while(false);

                }

The correct answer is 7.4.

• Blood consists of four things.
• The first is red blood cell i.e. red blood corpuscle.

Key Points

• The second is white blood cell i.e. white blood corpuscle.
• The third is platelets and the fourth is plasma.
• Human blood plasma has a pH range of 7.35 - 7.45  which makes blood slightly basic or alkaline.
• About 55 percent of the total blood of the body is plasma.
• This plasma also contains about 92 percent water.
• About 7 percent of the vitamins are protein and one percent of the total contains minerals, salt, sugar, fat, hormones, and vitamins.

Exterior is antonym of interior.

Similarly,

The correct answer is option 4) i.e. ∞

CONCEPT:

• ​The time period of a pendulum is given by the equation:

​\(\Rightarrow T = 2\pi\sqrt{\frac {L}{g}}\)

Where L is the length of the string of pendulum and g is the acceleration due to gravity.

EXPLANATION:

• At a height of 900 km from the earth's surface gravity is absent.

Therefore, g = 0.

Substituting g = 0,

\(\Rightarrow T = 2\pi\sqrt{\frac {L}{0}} = ∞\)

Thus, the time period of the pendulum at a distance of 900 km from the Earth will be infinite.