Class 12 Model Questions Computer Science

NEB – GRADE XII
Computer Science
Model Question [2077 (2020)]
Candidates are required to give their answers in their own words as far as
practicable. The figures in the margin indicate full marks.
Time: 1.30 hrs. Full Marks: 30
Group ‘A’
(Long answer questions)
Attempt any two questions. 2×7.5=15

1. a) Explain if-else control structure with example. 3.5
   b) Define the terms inheritance and polymorphism. 2+2
2. What is function ? Write the advantages of function. Differentiate between
   library and user-defined function with example. 1+2.5+4
3. What is normalization write its advantages. Explain second and third normal
   form with example. 1.5+2+4
   Group ‘B’
   (Short answer questions)
   Attempt any three questions. 3×5=15
4. Explain system analysis phase of SDLC. 5
5. What is database model ? Explain relational model. 2+3
6. Differentiate between bounded and unbounded transmission media. 5
7. Write short note on: 2.5+2.5
   a) AI b) Router