NVS TGT Science Mock Test - 3 - NVS TGT/PGT MCQ

Brio Technologies received the prestigious 2024 Google Cloud Sales Partner of the Year Award for India, acknowledging their excellence in driving digital transformation through AI and cloud services, as well as their expertise in infrastructure modernization and data & AI solutions.

The Reserve Bank of India (RBI) has lowered the maximum risk for custodian banks issuing irrevocable payment commitments (IPCs) from 50% to 30%. This decision follows the reduction in trade settlement time from T+2 to T+1 and T+0 for select equities by stock exchanges. The revised guidelines aim to mitigate risks associated with potential downward price movements of equities purchased by foreign institutional investors/mutual funds over two successive days from the trade date.

If we see diagonally we will get 11 22 31 and the next diagonal series is 12 21 32. Similarly the next diagonal series after 9 12 21 is 8 13 20.

From Statement 1:

No one has exam after S.

Three people has exam between S and R.

N has exam before R.

M has exam after Thursday.

W has exam before B.

From, this statement, we get:

 So, from this statement, N has exam immediately after B.

From Statement 2:

Two people have exam before R, who has exam immediately after S.

B has exam after R but not on Saturday.

N has exam immediately after H.

From this statement, M has exam immediately after B.

So, either statement 1 or statement 2 alone is sufficient to answer the question.

Hence option C is correct.

User-level threads are very effective because a mode switch is not required to switch from one thread to another. Here is a detailed explanation:

• Definition: User-level threads are managed by the application without the intervention of the operating system. They are created and scheduled by the application itself.


• Advantages: User-level threads offer several advantages, including:




• No mode switch: User-level threads do not require a mode switch from user mode to kernel mode when switching between threads. This makes the context switch faster and more efficient.


• Thread management control: The application has full control over thread management, including scheduling, synchronization, and resource allocation.


• Portability: User-level threads can be easily ported across different operating systems, as they are independent of the underlying kernel.




• Disadvantages: User-level threads also have some limitations:




• Blocking system calls: If a user-level thread performs a blocking system call, it will block the entire process, as the kernel is unaware of the individual threads.


• Limited parallelism: User-level threads may not fully utilize the available hardware resources, as the operating system schedules threads at the process level rather than at the thread level.

In conclusion, user-level threads are very effective because they eliminate the need for a mode switch and provide greater control over thread management. However, they also have some limitations that need to be considered in certain scenarios.

1. Seek time: Seek time is the time taken by the disk drive to position the read/write head to the desired track on the disk. It involves moving the head arm across the platter to access the required data. Seek time is crucial because it directly affects the overall time required to access data on the disk.


2. Rotational time: Rotational time, also known as latency or rotational delay, is the time taken for the disk platter to rotate and bring the desired data under the read/write head. It depends on the rotational speed of the disk and the position of the data on the platter. It is an important factor as it contributes to the overall access time.


3. Transmission time: Transmission time refers to the time taken to transfer the data from the disk to the computer's memory or vice versa. It depends on the transfer rate of the disk and the speed of the data bus. While important, it is not specific to accessing data on the disk.


4. Waiting time: Waiting time refers to the time spent by the disk drive in handling other requests or performing internal operations before it can process the data access request. It includes time spent in the disk queue, waiting for other tasks to complete, or performing internal tasks like error correction. While it can affect the overall system performance, it is not directly related to accessing data on the disk.

Disciplinary issues come up when a teacher fails to engage students in a meaningful and constructive programme. The nature of students is volatile. They are easily distracted by things. Only a constructive programme could help them gain attention towards the meaningful tasks conducted in the classroom, so that their mind remains occupied to the most productive tasks.

As the teacher is following the principles of naturalism, she will not utilise project method. This is because project method is advocated by pragmatist and is focused mainly on child-in-society concept. The methods of teaching as per the naturalist include heuristic method, play-way method, observations and experiments.

The discovery approach is a type of teaching that encourages students to take a more active role in their learning process by answering a series of questions or solving problems designed to introduce a general concept.

Key Points

• The Discovery approach of teaching science is a constructive method, and it requires the active participation of children.
• This method allows students to create their own understanding and knowledge regarding any concept.
• In this method, the teacher act as a facilitator means teachers will provide problems and some resources to help students to develop understanding.
• Students use the inductive method of learning means they work on developing their own concept instead of just cramming the already presented concepts.
• So, this process is not completely controlled and guided by students, as teachers provide some cues.

Black is the absence of all light. Things appear black when they do not reflect or emit light. White is the presence of all colors of visible light. Objects appear white when they reflect or emit all wavelengths of visible light (or at least three wavelengths - Red, Blue and Green - in equal intensity.

Refractive index, also called index of refraction, measure  of the bending of a ray of light when passing from one medium into another. As per Snell's law and the given information ;

His displacement will be zero although distance covered is non-zero since he ends up where he started.

Displacement can be zero but distance cannot be zero because distance is the total path covered but displacement is the shortest distance between the initial and final position. It can be zero at the end of one round.

here given, mass = 50 kg
Height = 5 m ,   g  = 10 ms^-1
We know,  w = mgh
⇒   w  =  50 * 10 * 5 
⇒    w = 2500 J

Merits of Mendeleev's periodic table:

1) It helped in correcting the atomic masses of some of the elements e.g. beryllium was corrected from 13.5 to 9. Similarly, indium, gold, platinum etc.

2) He predicted the properties of some undiscovered elements and left gaps for them e.g. Eka-boron, eka-aluminum and eka-silicon names were given for scandium, gallium, and germanium (not discovered at the time of Mendeleev).

3) He framed the periodic table with vertical and horizontal columns and gave shape to it.

4) Isotopes are the atoms of the same element having different atomic masses. Therefore, according to Mendeleev’s classification, these should be placed at different places depending upon their atomic masses. For example, hydrogen isotopes with atomic masses 1,2 and 3 should be placed at three places. However, isotopes have not been given separate places in the periodic table because of their similar properties.

Hence, option A is correct.

Plaster of Paris is commonly used in home decoration. It can be utilized to create decorative wall accents, ceiling tiles, and other architectural details. Additionally, it is popular for making decorative figurines, ornaments, and various crafts due to its versatility and ease of use. These applications highlight the broad range of uses for Plaster of Paris beyond just sculpting and art.

Particles of solids have a very high force of attraction, particles of liquid have less force of attraction than solids and particles of gases have very less force of attraction. So the correct order of increasing attraction between particles is Oxygen, water and sugar.

Conversion of methane to Carbon tetrachloride is a substitution reaction as hydrogen atoms are replaced by chlorine atoms.

Herbicide, an agent, usually chemical, for killing or inhibiting the growth of unwanted plants, such as residential or agricultural weeds and invasive species. A great advantage of chemical herbicides over mechanical weed control is the ease of application, which often saves on the cost of labour. Most herbicides are considered nontoxic to animals and humans, but they can cause substantial mortality of nontarget plants and the insects that depend on them, especially when applied aerially.

Natural vegetative propagation occurs when an axillary bud grows into a lateral shoot and develops its own roots. Plant structures allowing natural vegetative propagation include bulbs, rhizomes, stolons and tubers.

सही विकल्प '4 वश में कर लेना' है।

Key Points

• भेड़ बना लेना मुहावरे का अर्थ है 'वश में कर लेना'
• वाक्य प्रयोग - श्याम ने राम को अपने वश में कर लिया।

Additional Information

अन्य विकल्प-

• 'घोर विपत्ति आना' - बिजली गिरना।
• 'मन में जगह बना लेना'- मन मोह लेना।
• 'दीवार में चुनना' का सही मुहावरा होता है : 'दीवार तोड़ना' जिसका अर्थ होता है पुरानी दुश्मनी भुलाना।

Important Points

• मुहावरे - सामान्य अर्थ का बोध न कराकर विशेष अथवा विलक्षण अर्थ का बोध कराने वाले पदवंध को ही मुहावरा कहते है।
• मुहावरा अरबी भाषा का शब्द है मुहावरा अपूर्ण वाक्य होता है किन्तु वाक्य में प्रयोग करने से वाक्य का अभिन्न अंग बन जाता है ।
• मुहावरा एक वाक्यांश होता है।

अन्य मुहावरे-

• आग बबूला होना - अत्याधिक क्रोधित होना।
• आगे कुआं पीछे खाई - दोनों ओर संकट।
• आकाश के तारे तोड़ना - असंभव कार्य करना।

संज्ञा या विशेषण से बनने वाली क्रिया को 'नाम धातु' कहते है। अन्य सभी विकल्प गलत है।

Key Points

Additional Information

विशेष:

उपर्युक्त विकल्पों में से विकल्प 4 ‘निरामिष’ सही उत्तर है। अन्य विकल्प असंगत हैं।

Key Points

• 'सामिष' का सही विलोम शब्द 'निरामिष' है।
• सामिष​ और आमिष का अर्थ – मांस से युक्त।
• निरामिष​ का अर्थ – मांसरहित। (जो माँस नही खाता)

अन्य विकल्प -

Additional Information