Upwork/oDesk Game Programming Concepts Test
·
1. What is true regarding DirectX and
OpenGL?
Answers:
• DirectX is a collection of
API for games programming.
• DirectX is much
faster than OpenGL.
• DirectX is more
frequently used in professional graphics.
• OpenGL is an open
standard.
• OpenGL is multi-platform.
2. A UDP client sends a packet to a server on
port 80. The server responds using port 50'234 as source port. What will the
result be?
Answers:
• It will always
work.
• The response packet might
be blocked by state-full firewalls.
• The server will
crash when trying to use a different port.
• None of the
above
3. How many 3 dimension vectors are needed to
position and orient an object in space?
Answers:
• 1
• 2
• 3
• 4
• 5
4. A texture is composed of fragments.
Answers:
• True
• False
5. A particle engine can be done using either
vertices or fragments.
Answers:
• True
• False
6. Shadow volumes use per-pixel lighting.
Answers:
• True
• False
7. What does dereferencing mean in C?
Answers:
• Accessing a pointer's
value
• Accessing the
value pointed by a pointer
• Adding a second
reference to a pointer
• None of the
above
8. What is the Gilbert-Johnson-Keerthi
algorithm used for?
Answers:
• Collision detection
• Texture
uploading
• File
compression
• Network
priority queue
9. What is a data structure?
Answers:
• A list of
values with names associated to them
• An object array
• An event list
• None of the above
10. What are the differences between
anisotropic filtering and trilinear filtering?
Answers:
• Anisotropic
filtering gives a better quality than trilinear filtering
• Trilinear gives a better
quality than Antisotropic filtering
• Anisotropic
filtering performs a linear interpolation
• Trilinear
filtering doesn't take the angle of vision into account
• Trilinear
filtering needs more bandwidth than anisotropic filtering
11. What is the result of a dot product?
Answers:
• A vector
• A scalar
• A matrix
• None of the
above
12. In a networked game, the client can be
coded in C while the server is coded in Ruby.
Answers:
• True
• False
13. What is 3D audio?
Answers:
• 3D audio is a
technique used to add sound to a 3D environment.
• 3D audio is a
sound effect that creates the illusion of multiple sound sources placed
anywhere in the 3D space.
• 3D audio is a special
effect that makes sound like in a specific place.
• None of the
above.
14. How much memory will an 8 bit per channel
RGBA texture of 256x256 pixels take?
Answers:
• 2Mbytes
• 2Mbit
• 2Moctet
• 2Kbytes
15. What is a cross product?
Answers:
• The product of
two floats
• The product of two vectors
• The product of
two matrices
• The product of
two ints
• None of the
above
16. What is a bones system?
Answers:
• A technique in
modeling to animate a 3D model
• A skeleton used
for the animation of a 3D model
• A skeletal animation
• A technique to
create a 3D model
17. What does bump mapping do?
Answers:
• It flattens a
texture
• It adds a relief effect to
a texture
• It adds minor
displacements to a surface
• None of the
above.
18. What does the following statement
describe?
It renders the scene from the light point of
view, in a depth texture; then it renders the scene again from the camera point
of view using the depth texture to determine if a pixel is in shadow or not.
Answers:
• Collision
detection
• Depth mapping
• Shadow mapping
• Texture mapping
• None of the
above
19. What are shadow volumes?
Answers:
• Shadow volumes are a
technique used in 3D computer graphics to add shadows to a rendered scene.
• Shadow volumes
are a fast way to add shadows to a 3D scene.
• Shadow volumes
are a very slow way to add shadows to a 3D scene.
• None of the
above.
20. What are pbuffers?
Answers:
• Point buffer
objects
• Pixel buffer objects
• Particle buffer
objects
• None of the
above
21. The UDP is an acknowledged protocol.
Answers:
• True
• False
22. How many layers are there in the OSI
model?
Answers:
• 1
• 3
• 5
• 7
• 9
23. The fundamental idea behind particles is
that they are immune to physics laws (collisions, ...).
Answers:
• True
• False
24. What is network endianess?
Answers:
• big endian
• little endian
• vax endian
• None of the
above
25. While using RGBA, what is the color of
#ff00ff80?
Answers:
•
Semi-transparent red
•
Semi-transparent magenta
•
Semi-transparent blue
•
Semi-transparent yellow
•
Semi-transparent orange
26. Which one of the following languages can
easily be embedded into a game engine?
Answers:
• C
• Perl
• lua
• Java
• Objective-C
27. Which one in the following list is the
usual correct game design for sound?
Answers:
• Music is played
on the left speaker while sound effects are on the right one.
• Music is played
on the right speaker while sound effects are on the left one.
• Music is played
in stereo and sound effects are mixed above it.
• None of the
above
28. Which ones in the following file format
list are lossless file formats?
Answers:
• FLAC
• mp3
• aac
• aiff
• ogg
29. What is a lightmap?
Answers:
• A texture
describing the displacement of a surface
• A texture
describing the brightness of a surface
• A texture
describing the bump of a surface
• None of the
above
30. Why is the TCP protocol considered a
reliable protocol?
Answers:
• Because it is
widely used
• Because it is
acknowledged by routers
• Because it is
acknowledged by both peers
• TCP is not
reliable, UDP is
• None of the
above
31. What is pathfinding?
Answers:
• An algorithm
used to find a route between A and B
• An algorithm
used to upload data rapidly
• A client to
server connection
• None of the
above
32. What is a mesh?
Answers:
• A visual effect
• A 3D model part
• The physical
representation of a 3D model
• None of the
above
33. What is object oriented programming?
Answers:
• An attempt to
aid programmers in the separation of concerns like cross-cutting concerns
• A programming
paradigm that uses "objects" and their interactions to design
applications and computer programs
• A paradigm
based on policies
• None of the
above
34. Which of the following is a good design?
Answers:
• Uploading a
complete texture to the GPU for each frame
• Uploading the
texture once and, if part of it changes, uploading the changed sub textures
• Uploading the
texture once,and then, if it changes, uploading it again
• Not using any
texture for unfiltered images but drawing directly from the CPU at each frame
(e.g. glDrawPixels)
35. What is parallax mapping?
Answers:
• A vertices
mapping technique
• A ray tracing
technique
• An enhancement
of the bump mapping technique
• A renderer
• None of the
above
36. What is a physics engine?
Answers:
• A piece of code
regulating 3D models
• A simulation
using Newtonian physics models
• A visual effect
• None of the
above
37. What primitive is used to draw particles?
Answers:
• points
• lines
• quads
• triangles
• Any primitive
may be used depending on the situation
38. What is an event queue?
Answers:
• A synchronous
communication protocol
• A mail system
• A message queue
used for inter-process or inter-thread communication
• None of the
above
39. What is rasterization?
Answers:
• Collision
detection
• Texture mapping
• The task of
taking an image described in a vector graphics format and converting it into
pixels
• None of the
above
40. What is UV Mapping?
Answers:
• A mathematical
model of a surface
• The process of
painting vertices
• A 3D modeling
process to make a 2D image represent a 3D model
• None of the
above
41. What is a graphical projection?
Answers:
• A protocol by
which an image of a 3D object is projected onto a planar surface
• A technique to
display a surface in a 3D scene
• A protocol by
which an image of a 2D object is projected onto a 3D scene
• None of the
above.
42. Which of the following are multivariate
interpolations?
Answers:
• Nearest
neighbor
• Bicubic
• Bilinear
• Inverse
distance weighting
• Kriging
• All of the
above
43. What is the following 4x4 matrix called?
1 0 0 0
0 1 0 0
0 0 1 0
0 0 0 1
Answers:
• Unary matrix
• Normalized
matrix
• Identity matrix
• Reverse matrix
• None of the
above
44. What is a particle emitter?
Answers:
• The destination
of the particles
• The origin of
the particles
• The orbits of
the particles
• None of the
above
45. What is a garbage collector?
Answers:
• A visual effect
• A form of
automatic memory management
• A form of
manual memory management
• A reference
count based memory management
• None of the
above
46. What is a sprite?
Answers:
• A fairy
• An image or
animation that is integrated into a larger scene
• A 3d model
• None of the
above
47. What is a shader?
Answers:
• A way of
uploading vertices to the GPU
• A memory effect
• A list of
renderer instructions to produce certain visual effects
• A smooth visual
effect
• None of the
above
48. What is a singleton?
Answers:
• A design
pattern that uses only static object methods
• A design
pattern that uses only non-static object methods
• A design
pattern that is used to restrict the instantiation of a class to one object
• None of the
above
49. What is the base component of a 3D model?
Answers:
• Lines
• Vertices
• Surfaces
• Cubes
• Spheres
50. What is VRAM?
Answers:
• Video memory
• A dual-ported
variant of DRAM
• A special
memory once used to store the frame buffer
• None of the
above
51. What is the utility of z-buffering?
Answers:
• Z-buffering is
used to solve the problem of deciding which elements of a rendered scene are
visible and which are hidden
• Z-buffering is
used to render a texture
• Z-buffering is
used to render distant objects
• None of the
above
52. What is texture mapping?
Answers:
• A technique to
place a texture at a certain position
• A method to
create textures
• A method to
apply textures to a 3D model
• A technique to
adjust the perspective of textures
53. Which of the following are antialiasing
techniques?
Answers:
• Supersampling
•
Adaptivesampling
• Multisampling
• Fastsampling
• Cubicsampling
54. What is portal rendering?
Answers:
• A visibility
determination algorithm
• A shadowing
technique
• A collision
detection algorithm
• None of the
above
55. What is true regarding lossy compression?
Answers:
• It has lower compression
ratio than lossless compression
• Compressing
data and then decompressing it retrieves the same data
• Compressing
data and then decompressing it retrieves data that may well be different from
the original
• It removes most
of the inaudible sounds to provide better compression
56. What is double buffering?
Answers:
• A technique to
minimize flickering
• A technique to
make rendering faster
• An image
loading technique
• None of the
above
57. What is a vector?
Answers:
• A complex
number
• A couple of 2
numbers
• A geometric
object with a weight and a length
• A geometric
object which has both a magnitude and a direction
58. What is a GPU?
Answers:
• A random number
generator
• A dedicated
graphic processor
• A special
memory used for network buffers
• None of the
above
59. What is the usual MTU for ethernet
networks?
Answers:
• 1000
• 1500
• 2030
• 9000
60. What's an asset?
Answers:
• Money needed to
fund the game
• A compressed
file
• Everything that
is used in a game (sounds, textures, sprites...).
• None of the
above
61. What's a timer?
Answers:
• An entity which
represents a task to be executed at a regular interval
• A list of
functions
• A rapid
function
• None of the
above
62. What is multitexturing?
Answers:
• A process to
apply different textures alternately to the same surface
• An algorithm to
apply many different textures to the same surface at the same time
• Neither of the
above.
63. What is a particle system?
Answers:
• A technique
consisting in using small chunks of memory
• A technique to
simulate certain phenomena like fire, smoke or dust
• A rendering
technique
• A technique for
generating particles
64. What is a hash table?
Answers:
• A value array
• A data
structure that associates keys with values
• A list of
values
• A data
structure that associates values with keys
• None of the
above
65. What is a quaternion?
Answers:
• A list of
vectors
• A linear
equation description
• An array of
numbers
• Non-commutative
extension of complex numbers
• None of the
above
66. What is Havok Physics?
Answers:
• A physics SDK
created by Havok
• A special way
to handle game physics with quaternion
• A collision
detection algorithm
• None of the
above
67. What is a resource manager?
Answers:
• A system to free
objects in a game
• A system to add
objects to a game
• A system to
load and free resources in a game
• A system to
simplify access to various resources in a game
• A system to
increase the loading speed
68. What is RAMDAC?
Answers:
• A second video
ram for 3D objects
• A fast video
ram
• A memory that
contains the textures
• A memory
storing the color pallet and a converter to generate an analog signal
69. What is mipmapping?
Answers:
• A technique to
increase the quality of textures
• A technique
that decreases or increases the resolution of a texture depending on the
distance between the point of view and the textured object
• A technique to
resize textures
• A technique to
apply textures
70. What is IEC 60559
Answers:
• A file format
• A network
protocol
• A floating
point standard
• None of the
above
71. What is HDRR?
Answers:
• The application
of multiple textures
• The rendering
of 3D scenes by using lighting calculations done in a larger dynamic range
• A fast path to
copy vertices to the video card
• None of the
above
72. What is a quadric?
Answers:
• A 3D object
which is hard coded
• A D-dimensional
hyper-surface defined as the locus of the zeros of a quadratic polynomial
• A 3D object
evaluated using tesselation
• None of the
above.
73. What is a MIDI file?
Answers:
• A regular audio
file
• An audio file
containing sound waves
• A file
containing instructions for instrument synthesizers
• An image file
• None of the
above
74. What is framerate?
Answers:
• The number of
frames in a game
• The monitor
refresh rate
• The number of
times an image is rendered per second
• None of the
above
75. What is scanlines rendering?
Answers:
• A fast way to
access an image
• A black and
white effect
• An algorithm
for visible surface determination
• A technique to
create a blur effect
• None of the
above
76. What is back buffer?
Answers:
• It is a
rendering mode for full screen interface
• It is a graphic
abstraction layer for rendering
• It is a 3D
display technology
• It is the
drawing target buffer in a double buffering system
• None of the
above
