21. Computer-assisted graphical entry is done through
A. monochrome
B. grayscale graphics
C. bichrome
D. trichrome
Answer: A
Computer-assisted graphical entry of mask geometry is through either monochrome or color graphics terminal.
22. Which method is used for verification along with generation?
A. hand-crafted designs
B. computer-assisted textual entry
C. computer-assisted graphical entry
D. silicon compiler-based design
Answer: C
Computer-assisted graphical entry method encourages regularity and is generally used with a generate then verify design philosophy.
23. Which method uses a high-level programming language?
A. hand-crafted designs
B. computer-assisted textual entry
C. computer-assisted graphical entry
D. silicon compiler-based design
Answer: D
Silicon compiler-based design uses a high-level approach and uses special languages like high-level language compilers.
24. The set of design rules does not give
A. widths
B. spacing
C. colors
D. overlaps
Answer: C
Communication between the fabrication house and the designer takes the form of a set of design rules with gives clearance, widths, spacing, overlaps, etc.
25. Caltech intermediate form code is a
A. low-level graphic language
B. low-level textual language
C. high-level graphic language
D. high-level textual language
Answer: A
Caltech intermediate form code is a low-level graphic language used to specify the geometry of integrated circuits.
26. CIF generates code that is
A. high-level language
B. assembly level language
C. machine-readable language
D. very high-level language
Answer: C
CIF code is to communicate chip geometry in a standard machine-readable form for mask-making.
27. CIF code is compatible with
A. low system geometry
B. large system geometry
C. both low and large system geometry
D. medium system geometry
Answer: C
CIF code is reasonably compact and can cope with both low and large system geometry. It is easily readable.
28. Design through CIF is done using
A. color codes
B. geometric shapes
C. different layer thickness
D. transistors
Answer: B
In Caltech intermediate form code, the design is given using geometric shapes. Boxes, polygons, and wires are readily defined.
29. The CIF dimensions are given in the form of
A. X, Y coordinates
B. lambda form
C. millimeter form
D. alpha form
Answer: A
The CIF dimensions and positions are given in X, Y coordinate form but are in absolute dimension units and not in lambda form.
30. Polygons in CIF are specified in terms of
A. length
B. width
C. vertices
D. angles
Answer: C
In CIF, polygons(P) are specified in terms of vertices in order. An n-sided polygon needs n vertices and a connection between first and last.
