# Placement Papers: CMC Sample Test Paper

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- What is the maximum total number of green roofs for houses Ans: (C)
- There are 5 red shoes, 4 green shoes. If one drasw randomly a shoe what is the probability of getting redshoe is 5c1/9c1
- What is the selling price of a car? cost of car is Rs. 60 & profit 10% profit over selling price Ans: Rs. 66/-
- ⅓ of girls, ½ of boys go to canteen. What factor and total number of clasmates go to canteen. Ans: Cannot be determined.
- price of a product is reduced by 30%. What percentage should be increased to make it 100% Ans: 42.857%
- There is a square of side 6cm. A circle is inscribed inside the square. Find the ratio of the area of circle to square.
- r = 3 circle/square = 11/14
- Two candles of equal lengths and of different thickness are there. The thicker one will last of six hours. The thinner 2 hours less than the thicker one. Ramesh light the two candles at the same time. When he went to bed he saw the thicker one is twice the length of the thinner one. For how long did Ramesh lit two candles.
- Ans: 3 hours.
- M/N = 6/5 3M + 2N =? Ans: Cannot be determined
- p/q = 5/4 2p + q =? cannot determined.
- If PQRST is a parallelogram what it the ratio of triangle PQS & parallelogram PQRST Ans: 1: 2
- cost of an item is Rs. 12.60 7 profit is 10% over selling price what is the selling price Ans: Rs. 13.86/-
- There are 6 red shoes & 4 green shoes. If two of red shoes are drawn what is the probability of getting red shoesAns: 6c2/10c2
- 15 lts of water containing 20% alcohol, then added 5 lts of water. What is % alcohol. Ans: 15%
- A worker pay 20/-day, he works 1, ⅓ ⅔ ⅛ ¾ in a week. What is the total amount paid for that worker Ans: 57.50

## Test of Oracle

- What are the difference b/w candidate key, primary key and unique key?
- What is difference b/w pre query and post query?
- How many number of columns can be created in a single table.
- What is meant by ROWID? Why we need it?
- What is transaction?
- Difference b/w function, procedure?
- Which one is the best way to find out the number of rows in a table, state by following count-1 and count ( * ), count (rowed)
- One table is given and questions based on this table.
- Write query to delete a single column in a table.
- Write query to add one more column in a existing table.
- Write query to delete only 2 duplicate records in a table. But the table they have given contains 3 duplicate records. How to do it.
- Some SELECT statements queries they asked like using group by, ordered by, where etc.