1) Hit Ratio

• i) While choosing the best test series candidates should think foremost about the Hit Ratio parameter. It depends on how many direct questions are coming in Prelims from the test series.
• ii) The total number of questions in the test series is a factor to consider when choosing the test series.

ii) If any coaching centre test series claims that solving their series makes you get 80-90% of questions common in examinations, then it is a false claim.

1. • In recent years the UPSC CSE examination has become more dynamic, and most of the questions are analytical. So if candidates think by solving the test series the candidates can clear the UPSC, then it is a myth. Test series are just for accompanying the method.

• •  40 to 50% common question test series is a good test series according to the UPSC toppers.

2) Ease of Use

1. If candidates are choosing an online test series then it is important to look after easy access to the apps and dedicated website sites. Watch the website is mobile-friendly as many candidates do not have access to computers and laptops.
2.  Watch if the website is bug inflicted or not, or if the website crashes while giving the test examination.
3. Look for flexibility in the test series website. Watch the flexibility of the test attempts. Are the attempts unlimited or not? Or see that can you access the test series whenever and wherever you need.

3) Quality of Tests

1.  Before applying for any test series check the quality of the question of the test series. Good-quality questions are mandatory thing whenever a candidate chooses a test series.
2. Always check the reviews of the test series which the candidates are trying to apply for.
3. Look for a free mock test before involving in the actual test series. Check if there is a free mock test available in the test series to which you are trying to apply. 

4) Solutions and Reports

1. Always join those test series which will give Instant detailed solutions. For instance, in the context of online coaching after completing the test there should be a described explanation of your given answer.
2. Always select those test series which are self-explanatory While selecting the test series before the UPSC Prelims or Mains examination.

5) Mentorship and Cost

1.  Select those test series which provide personal mentorship. As every candidate needs self-evaluation.
2. Check the reasonable test series of 99 NOTES IAS. Select a coaching test series which is cost-effective and does not feel heavy on pockets. Go for an affordable test series which not charge up to 8k for all mock tests of prelims and mains.