Term 1 Five Mark Model Questions

11th Standard

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Computer Science

Time : 02:00:00 Hrs
Total Marks : 50
    10 x 5 = 50
  1. Discuss the various generations of computers.

  2. Convert (98.46)10 to bianary

  3. Subtract 11010112 - 1110102

  4. How the read and write operations are performed by a processor? Explain.

  5. Explain the types of ROM.

  6. Explain the main purpose of an operating system

  7. Explain the versions of Windows Operating System.

  8. Exchange the contents: Given two glasses marked A and B. Glass A is full of apple drink and glass B is full of grape drink. For exchanging the contents of glasses A and B, represent the state by suitable variables, and write the specification of the algorithm.

  9. Trace the step-by-step execution of the algorithm for factorial(4). factorial(n)
    --inputs: n is an integer, n > 0
    -- outputs: f = n!
    f, i := 1 ,1 while i < n
    f, i := f X i, i1+

  10. Power can also be defined recursively as \({ a }^{ n }=\begin{cases} 1\quad \quad \quad \quad \quad \quad ifn=0 \\ a\times { a }^{ n }-1\quad \quad ifn\quad is\quad odd \\ { a }^{ n/2 }\times an/2\quad ifn\quad is\quad even \end{cases}\) Construct a recursive algorithm using this definition. How many multiplications are needed to calculate a10?

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