We are given a set of multiple-choice questions related to computer science concepts. We need to select the correct option for each question.

1. Problem Description

We are given a set of multiple-choice questions related to computer science concepts. We need to select the correct option for each question.

2. Solution Steps

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2. Convert the octal number $1445_8$ to decimal.

$1445_8 = (1 \times 8^3) + (4 \times 8^2) + (4 \times 8^1) + (5 \times 8^0) = 512 + 256 + 32 + 5 = 805_{10}$.

Now we convert $805_{10}$ to binary.

$805 = 512 + 256 + 32 + 4 + 1$

$805 = 2^9 + 2^8 + 2^5 + 2^2 + 2^0$

$805_{10} = 11001000101_2$. Padding with zeroes to have 12 digits, we get $001100100101_2$.

Therefore, the correct option is (2).

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3. Convert the hexadecimal number $32_{16}$ to decimal.

$32_{16} = (3 \times 16^1) + (2 \times 16^0) = 48 + 2 = 50_{10}$.

Now we convert $50_{10}$ to octal.

$50 = 6 \times 8 + 2$

So, $50_{10} = 62_8$.

Therefore, the correct option is (3).

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4. BCD (Binary Coded Decimal) represents each decimal digit with its 4-bit binary equivalent.

The number is

2

3

5. 2 in BCD is

0

0

1

0. 3 in BCD is

0

0

1

1. 5 in BCD is

0

1

0

1. Therefore, the BCD value of 235 is 0010 0011

0

1

0

1. This is none of the given options.

If we assume there is a typing error and (4) is supposed to be 001000110101, then the correct answer is (4).

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5. The ASCII character "B" is represented as $1000010_2$. "E" is 3 characters after "B" in the alphabet. Hence its ASCII representation is simply the number represented by 'B' plus

3. $1000010_2 = 64 + 2 = 66$. Then $66 + 3 = 69$.

$69 = 64 + 4 + 1 = 2^6 + 2^2 + 2^0$.

$69_{10} = 1000101_2$.

Therefore, $1000101_2$ padded to 8 digits is $01000101_2$. None of the answers are correct.

If 'B' were $100001_2 = 33$, then 'E' would be $33 + 3 = 36 = 32 + 4 = 100100_2$ and again none of the solutions are correct. It might be that the problem is assuming BCD, however this does not lead to one of the solutions being the right one.

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6. Portrait and Landscape in a word processing software are called Page Orientation.

Therefore, the correct option is (1).

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7. Word processing software can be used to change a word mentioned in different places even in a long document. This facility is called Find and Replace.

Therefore, the correct option is (3).

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8. Features that affect the popularity of using word processing software in a computer than the typewriter are:

A. Re-editing can be done easily.

B. Checking spelling and Grammar easily.

C. Ability to add pictures.

Therefore, the correct option is (4) A, B, and C.

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9. The facility/Tool that can be used to write $CO_2$ is Subscript.

Therefore, the correct option is (4).

3. Final Answer

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2. (2)

1

3. (3)

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4. (4)

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5. None of the options

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6. (1)

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7. (3)

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8. (4)

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9. (4)