Dubai Stem Olympiad 2019-20 Round 2 | Senior Category
.
- 1.
6 bottles are chosen at random from a large batch of bottles, 10% of which are faulty. Find the probability that of the 6 chosen, none are faulty
- A.
0.469
- B.
0.0984
- C.
0.531
- D.
0.246
Correct Answer
C. 0.531 -
- 2.
Machines that perceives its environment and takes actions that maximize its chance of successfully achieving its goals
- A.
Database Management System
- B.
Management Information System
- C.
Artificial Intelligence
- D.
Expert Systems
Correct Answer
C. Artificial Intelligence -
- 3.
What type of energy cannot travel across space?
- A.
Sound energy
- B.
Light energy
- C.
Radio energy
- D.
Heat energy
Correct Answer
A. Sound energy -
- 4.
A boy weighing 500 N sitting 3 m from the pivot point requires someone weighing 250 N to be sitting ____ on the opposite side.
- A.
0.5 m
- B.
5 m
- C.
50 cm
- D.
6 m
Correct Answer
D. 6 m -
- 5.
The musical instrument below is a music triangle, the side lengths of which are 10cm. The triangle only has two angles, one at the top, and one at the bottom, as the other vertex has been removed to form a gap. One of the angles (the angle at the bottom left) is 57 degrees. Find the other angle angle formed at the top.
- A.
35 degrees
- B.
57 degrees
- C.
83 degrees
- D.
74 degrees
Correct Answer
B. 57 degrees -
- 6.
A mobius strip is formed when a rectangle is twisted and then the ends are stuck together. If an ant starts on a point on the mobius strip's surface and travels the length of the mobius strip twice, where will it end up relative to its original position?
- A.
On the same point it started but on the underside of the surface
- B.
At a finite distance from the point it started
- C.
At the same point it started
- D.
More information is needed
Correct Answer
C. At the same point it started -
- 7.
If two massive objects in space are at distance x, and the gravitaional force between them is y, what is the gravitational force between them when the distance is doubled?
- A.
2y
- B.
4y
- C.
Y/2
- D.
Y/4
Correct Answer
D. Y/4 -
- 8.
Increasing the size of a driver pulley and reducing the size of the driven pulley would do what to the speed of the mechanism?
- A.
Increase the speed of the mechanism
- B.
Decrease the speed of the mechanism
- C.
Increase the speed of the mechanism at first then gradually slow down
- D.
It would have no effect on the speed of the mechanism
Correct Answer
A. Increase the speed of the mechanism -
- 9.
Jacob has several small congruent square tiles to use in a mosaic. When he forms the tiles into a square of side n, he has 81 tiles left over. When he tries to form the tiles into a square of side n + 1, he has 64 too few. How many tiles does he have in total?
- A.
4786
- B.
5246
- C.
6737
- D.
5265
Correct Answer
D. 5265 -
- 10.
The clock is at 12:00, what will the time be on the clock when the angle between the hands is the LCM of 15 and 2?
- A.
12:10
- B.
12:20
- C.
12:30
- D.
12:05
Correct Answer
D. 12:05 -
- 11.
When an algorithm is written in the form of a programming language, it becomes a _________
- A.
Flowchart
- B.
Program
- C.
Pseudo code
- D.
Syntax
Correct Answer
B. Program -
- 12.
Sara bought a 300 AED item and sold it for value x, where x is defined by the equation sin(x) = (√3)/2. What is her percentage loss? (x is in degrees)
- A.
80%
- B.
90%
- C.
60%
- D.
70%
Correct Answer
A. 80% -
- 13.
When you are driving around a curve, the force of friction on your tires pushes you in toward the center of the curve (hopefully). A force which pushes an object on curved path toward the center is called a(n)
- A.
Gravitational force.
- B.
Mechanical force
- C.
Centripetal force
- D.
Excessive force
Correct Answer
C. Centripetal force -
- 14.
The hexagonal prism below has a end-faces as regular hexagons, a = 2 and h = 5. Find the volume of the hexagonal prism.
- A.
30√3
- B.
30√4
- C.
6√3
- D.
20√4
Correct Answer
A. 30√3 -
- 15.
A librarian wants to create a list of all the books in the library. If he has a list, but wants it to be in alphabetical order, which of the following would be the most appropriate to use?
- A.
Binary Search Algorithm
- B.
Bucket Sort Algorithm
- C.
Bubble Sort Algorithm
- D.
Linear Search Algorithm
Correct Answer
C. Bubble Sort Algorithm -
- 16.
Which of the following would be most appropriate to create a Machine Learning model?
- A.
Python
- B.
PHP
- C.
HTML
- D.
All of the above
Correct Answer
A. Python -
- 17.
John works for an advertising company that is trying to make 20,000 brochures. Which of the following would be most appropriate to print all 20,000 of them?
- A.
Laser Printer
- B.
Inkjet Printer
- C.
3D Printer
- D.
Dot Matrix Printer
Correct Answer
A. Laser Printer -
- 18.
Mark is typing an essay that is due in 2 hours. Each time he presses a key on the keyboard of his laptop, an electrical signal is sent. This electrical signal is first stored in a/an _____________ before it is sent to the processor to be processed. Fill in the blank.
- A.
Buffer
- B.
Chip
- C.
Interrupt
- D.
GPU
Correct Answer
A. Buffer -
- 19.
Which of the following technologies would be the most appropriate for a flexible screen on a wearable?
- A.
OLED
- B.
LED
- C.
LCD
- D.
CCFL
Correct Answer
A. OLED -
- 20.
Which 3 dimensional shape has 5 vertices?
- A.
Triangular prism
- B.
Square pyramid
- C.
Triangular pyramid
- D.
Cube
Correct Answer
B. Square pyramid -
Quiz Review Timeline +
Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.
-
Current Version
-
Mar 21, 2022Quiz Edited by
ProProfs Editorial Team -
Dec 24, 2019Quiz Created by
Back to top