DRDO STA Computer Science Tier 1 Mock Test - 1 Free Online Test 2026

The average of two numbers is 8 and that of another three numbers is 3. The average of these five numbers is-

What must be added to each term of the ratio 2 : 5 so that it may equal to 5 : 6 ?

O is the center of the circle. AC and BD are two chords of the circle intersecting each other at P. If ∠APB=30⁰,∠APB=30⁰, and ∠AOB=45⁰∠AOB=45⁰ then ∠DOC∠DOC is equal to ?

A 6 m-long vertical pole casts a shadow of 4 m. At the same time, a tower casts a shadow 25 m long on the ground. The height of the tower is :

A does 60% of a work in 45 days. He then calls B, and they together finish the remaining work in 18 days. How long B alone would take to do the whole work?

There are two taps P and Q that can fill a tank in 12 and 24 minutes respectively. Both of them are opened together and after 4 minutes Q is closed. How long more it take for P alone to fill the tank?

What value we get when: √(9² - 4³ + 3) is multiplied by √(2⁵ * 10^-1)?

D and E are the mid-points of AB and AC of ∆ABC, BC is produced to any point P; DE, DP and EP are joined. then, area of:

The ratio of 4th and 2nd term of an A.P of positive terms is 5:3 and the product of the 1st and the 3rd terms is 72. what is the product of the 5th and 6th terms of the AP?

The angles of elevation of the top of a tower 90 m high, from two points on the level ground on its opposite sides are 45° and 60°. What is the distance between the two points (rounded off to the nearest integer)? (√3 = 1.732)

The value of tan 31° tan 33° ... tan 59° is equal to:

If the average of twelve consecutive even numbers is 113, find the sum of the 3rd and 8th numbers among them?

Identify the diagram that best represents the relationship among the given classes.

Children, students, adults

Arrange the following in a meaningful order:

1. Curd

2. Grass

3. Butter

4. Milk

5. Cow

What should come at the place of question mark?

KM5, IP8, GS11, EV14, ?

How many Sundays are there in between 3rd June 2016 and 3rd October 2016, if it is given that 1st June 2016 was Wednesday.

DIRECTIONS: In each of the following questions, choose the set of numbers out of the four options that is similar to the given set.

given set:(17, 35, 71)

Each question below is followed by two arguments numbered I and II. You have to decide which of the argument is a 'strong' argument and which is a 'weak' argument. 'Strong' arguments are those which are both important and directly related to the question. 'Weak' arguments are those which are of minor importance and also may not be directly related to the question.

Statement: Should young entrepreneurs be encouraged?

Arguments: I. Yes. They will help in the industrial development of the country.

II. Yes. They will reduce the burden on the employment market.

There are two sets of figures, namely problem Figures containing five figures 1, 2, 3, 4, 5 and answer figures (a), (b), (c), (d). You have to select one Figure from the answer set, which will continue the same series as given in problem set figures.

Problem Figure

Answer Figure

DIRECTIONS: Identify the diagram that best represents the relationship among Iron, Lead, Nitrogen.

Choose the correct venn diagram.

what comes in place of ?

If’ A’ is coded as 1, ‘B’ as 3, ‘C’ as 5 and so on, which of the following is the numerical value of the word ‘FAZED’?

Given below is a statement followed by 2/3 Assumptions. An assumption is something not written directly but can be considered as the implicit understanding before writing any text, document or writing. Choose the implicit assumption in the following question:

Statements:

1. India is manufacturing a much greater number of two wheelers than it did a decade back.

2.The quality has also improved quite a lot.

Assumption :

I.We are exporting two wheelers.

II. Our two-wheeler industry has made commendable progress.

The frequency range of hearing for a normal young person is ___________ hertz.

A boat will submerge when it displaces water equal to its own _______

Wildlife consists of

Mark the national tree

Which of the following is used as a moderator in nuclear reactors?

In the following questions, some part of the sentence is underlined. Which of the options given below the sentence should replace the part underlined to make the sentence grammatically correct? If the sentence is correct as it is given then choose option 4 ‘No Replacement’ as the answer.

Q. As she had visited quite number of places, she knew the routes well.

In the following question, out of the four given alternatives, select the one which is SIMILAR in meaning of the given word.

Extravagant