Plus One Computer Application Chapter Wise Previous Questions Chapter 1 Fundamentals of Computer

Kerala Plus One Computer Application Chapter Wise Previous Questions Chapter 1 Fundamentals of Computer

Question 1.
Name the character representation coding scheme developed in India and approved by the Bureau of Indian Standards (BIS). (March – 2015)
Answer:
lSCM(Indian Standard Code for Information Interchange)

Question 2.
Fill the series. Series (Say – 2015)
(151)₈ (153)₈ (155)₈ ………, ……… .
Answer:
(157)₈, (161)₈

Question 3.
The meaningful and processed form of data is known as …….. . (March – 2016)
Answer:
Information

Question 4.
Which one of the following is considered as brain of the computer? (Say – 2016)
a) Central Processing Unit
b) Control Unit
c) Arithmetic Logic Unit
d) Monitor
Answer:
a) Central Processing Unit

Question 5.
Which one of the following CPU resister helds address of next instruction to be executed by the processor? (Say – 2016)
a) Accumulator
b) Instruction Register (IR)
c) Memory address Register
d) Program Counter (PC)
Answer:
d) Program Counter (PC)

Question 6.
Processed data is known as (March – 2017)
a) facts
b) figures
c) information
d) raw material
Answer:
c) information

Question 7.
Find the smallest number in the list. (March – 2015)
a) (1101)₂
b) (A)₁₆
c) (13)₈
d) (15)₁₀
Answer:
Convert all the numbers into a common base i.e. to decimal
a) (1101)₂ = 1*2³ + 1*2² + 0*2¹ + 1*2°
= 8 + 4 + 0 + 1
= (13)₁₀
b) (A)₁₆ = (10)_-10
c) (13)₈ = 1*8¹ + 3*8°
= 8 + 3
= (11)₁₀
d) (15)₁₀
Here (A)₁₈ is the smallest number

Question 8.
Represent -83 in 1’s complement form. (March – 2015)
Answer:
Divide the number 82 by 2 successively and write down the remainders from bottom to top +83=01010011
To take 1’s complement of a binary number change all 1 s to 0 and all 0s to 1.
Hence -83 is 10101100

Question 9.
a) Write the two’s complement form of the decimal number-119. (Say – 2015)
b) State the benefit of using two’s complement representation as compared to one’s complement form.
Answer:
a) Binary equivalent of 119 in 8 bit is (0111 0111)2. To find the 2’s complement of -119. First find the 1’s complement and Odd 1 to it.

b) If a computer uses 8 bit word length, Is complement method can represent numbers from -127 to +127. That means only 127 + 128 = 255 numbers can represent. But 2’s complement method can represent numbers from -128 to +127. That means we can represent a total of 256 numbers. We can represent one number more in 2’s complement representation.

Question 10.
Write a short note on Unicode. (Say – 2015)
Answer:
It is like ASCII Code. By using ASCII, we- can represent limited number of characters. But using Unicode we can represent all of the characters used in the written languages of the world. Eg:- Malayalam, Hindi, Sanskrit,….

Question 11.
“Central Processing Unit (CPU) is the brain of the computer”. What is the role of Control Unit (CU) in the CPU? (March – 2016)
Answer:
All the activities of a computer is controlled by the control unit. That means the function of keyboard, mouse, monitor, memory etc. are controlled by the control unit.

Question 12.
Convert the hexadecimal (A2D)₁₆ into its octal equivalent. (Say – 2016)
Answer:
Step 1: First convert the number into binary for this do the following.
Write down the 4 bit binary equivalent of each digit

Step 2: Then convert this number into octal for this do the following
Divide the number into groups of 3 bits and write the corresponding octal equivalent.

Hence the result is (5055)₈

Question 13.
Data processing refers to the activities performed on data to generate information. List the stages of data processing. (Say – 2016)
Answer:
Data processing phases (6)
a) Capturing data – In this step acquire or collect data from the user to input into the computer.
b) Input-It is the next step. In this step appropriate data is extracted and feed into the computer.
c) Storage – The data entered into the computer must be stored before starting the processing.
d) Processing / Manipulating data – It is laborious work. It consists of various steps like computations, classification, comparison, summarization etc. that convert input into an output.
e) Output of information – In this stage we will get the results as information after processing the data.
f) Distribution of information – in this phase the information(result) will be given to the concerned persons/computers.

Question 14.
a) Convert (1010.11)₂ to decimal. (March – 2017)
b) Find the missing terms in the following series. 18₁₆, 1A₁₆, 1C₁₆, ………..
Answer:
a) 1*2³ + 0*2² + 1*2¹ + 0*2° + 1*2^-1 + 1*2^-2
= 8 + 0 + 2 + 0 + 0.5 + 0.25
= 10.75

b) The first element is 18₁₆
The second element is 1A₁₆
That means the difference is 2.
So, After 1C the elements are
1D₁₆, 1E₁₆, 1F₁₆, 20₁₆
Hence the missing terms are 1E₁₆, 20₁₆

Plus One Computer Application Chapter Wise Previous Questions