QB-Unit 1

2 MARKS

1.      What is a digital computer? Discuss its characteristics.

2.      What are the functional units of an electronic computer?

3.      Briefly explain the system unit of the digital computer.

4.      Briefly discuss the memory hierarchy of computer.

5.      On the basis of technology, discuss the classification of computers.

6.      Based on size and capacity how can we classify the computers?

7.      What do you understand by multitasking and multiprocessing?

8.      What is an operating system? What are the primary functions of an operating system?

9.      What is a number system? What do you understand by the base of a number system?

10.  What do you understand by ‘top-down’ approach?

11.  What are algorithms? What are its characteristics?

12.  What is a flowchart? Discuss its advantages and disadvantages.

13.  What are programming languages? Discuss its types.

14.  Explain the concept of linker and loader in ‘C’ programming.

15.  Differentiate between (Each carries 2 marks)

a.       Application and system software

b.      RAM and ROM

c.       Primary memory and Secondary memory

d.      Multitasking and multiprocessing systems

e.       Digital and analog computers

f.       Compiler and interpreter

g.      Hardware and Software.

h.      Linker and Loader

i.        High level and low level languages

j.        Assembly language and Machine Language.

 5 MARKS

1.      What is a digital computer? Draw its block diagram and discuss its components.

2.      Convert the following:

a.       (5214)₁₀ =  (   )₁₆

b.      (5A8.2F) ₁₆ = (  )₁₀

c.       (1011.101)₁₀ =  (  )₂

d.      (1011.101)₂ = (  )₁₀

e.       (451.25) ₁₀ = (   )₈

3.      Perform the following binary arithmetic:

a.       1101011 + 1000111 =

b.      10101 – 10011 =

c.       110 * 101 =

d.      11011 / 101 =

4.      Convert the following

a.       (22.17)₄  =  (    )₈

b.      ( 1234)₅  =   (   )₇

c.       1’s and 2’s complement of (27)₁₀

d.      1’s and 2’s complement of (111111)₂

5.      Write an algorithm and draw a flowchart of the following: (Each carries 5 marks)

a.       To calculate the simple and compound interest

b.      To find the largest (or smallest) among three numbers

c.       To swap two numbers using a third variable

d.      To swap two numbers without using a third variable

e.       To find whether a number is even or odd

f.       To find whether the given year is leap year or not

g.      To find whether the roots of quadratic equation are real or imaginary

h.      To find the sum of the digits.

i.        To reverse the digits.

j.        To find the sum of first n-numbers

k.      To find the sum of first n-even (or odd) numbers

l.        To calculate the factorial of a number

m.    To check whether the given number is Armstrong or not

n.      To find whether  a number is prime or not

o.      To print the Fibonacci series up to N number.

6.      Describe the generations of computer based on the (i) Hardware (ii) Software (iii) Computing characteristics (iv) Physical appearance and (v) Applications.

7.      What is DOS? Discuss atleast 5 internal and 5 external commands of DOS.

8.      Explain at least five feature of windows operating system

9.      Discuss the architecture of LINUX

10.  What is Android? What are its advantages?

11.  Draw a comparison between Windows and Android.