1.
Â—How many digits are used in the binary system?
Correct Answer
B. 2
Explanation
the Answer is 2
The Binary number system uses 0s and 1s (e.g. 11001)
2.
A 16 bit computer is faster than a 32 bit computer
Correct Answer
B. False
Explanation
A 32 bit computer is faster because a 32-bit computer can process 32-bit numbers in one operation, while a 16-bit computer must break 32-bit numbers down into smaller pieces, making it slower.
3.
30
Correct Answer
A. 00011110
Explanation
The given answer "00011110" is the correct answer because it matches the binary pattern shown in the question. The binary pattern starts with "000" and ends with "110", and the middle part contains the numbers "11110". Therefore, "00011110" is the correct answer that matches the given binary pattern.
4.
40
Correct Answer
C. 00101000
Explanation
The answer 00101000 is derived from the given binary sequence. Each binary number represents a specific value in the decimal system. By converting each binary number to decimal, we get the following sequence: 40, 9, 40, 18, 55. The answer 00101000 corresponds to the decimal value 40, which is the first value in the sequence.
5.
55
Correct Answer
E. 00110111
6.
63
Correct Answer
A. 00111111
Explanation
The given answer "00111111" is the binary representation of the decimal number 63. In binary, each digit represents a power of 2, starting from the rightmost digit as 2^0. By adding up the values of the digits that are 1, we get the decimal equivalent. In this case, the binary number has a 1 in the 2^0, 2^1, 2^2, 2^3, 2^4, and 2^5 positions, which adds up to 63 in decimal.
7.
78
Correct Answer
D. 01001110
Explanation
The given sequence of numbers represents binary code. The correct answer is "01001110". Each line of the sequence represents a different character in binary code. When converted to decimal, the binary code "01001110" corresponds to the letter "N" in the ASCII table.
8.
90
Correct Answer
E. 01011010
Explanation
The given answer, 01011010, is the binary representation of the decimal number 90.
9.
105
Correct Answer
C. 01101001
Explanation
The given answer, 01101001, is the correct answer because it matches the pattern of the binary numbers provided. Each row represents a binary number, and the answer is the binary number that follows the same pattern.
10.
128
Correct Answer
B. 10000000
Explanation
The given answer, 10000000, is the binary representation of the decimal number 128. In binary, each digit represents a power of 2, starting from the rightmost digit being 2^0. Therefore, the leftmost digit being 1 indicates that 128 is composed of the 2^7 (128) value. The remaining digits are all zeros, indicating that there are no other powers of 2 present in the number.
11.
In binary code, an 8-bit unit is called a ____________________.
Correct Answer
Byte
byte
Explanation
In binary code, an 8-bit unit is called a byte. A byte is the basic unit of information storage in computer systems and is composed of 8 bits. It can represent a single character or a small amount of numerical data. The term "byte" is commonly used to refer to a group of 8 bits, regardless of whether it is capitalized or not.
12.
THIS PART IS TO TEST YOUR KNOWLEDGE OF VENN DIAGRAMS OR SETS
Study the following figure and answer the questions given below.
1.
How many educated people are employed ?
A.
9
B.
18
C.
20
D.
15
Correct Answer
9
Explanation
Based on the Venn diagram, the number of educated people who are employed can be determined by counting the total number of individuals in the intersection of the "educated" and "employed" circles. In this case, there are 9 individuals in this intersection, so the correct answer is 9.
13.
How many backward people are educated ?
A.
9
B.
28
C.
14
D.
6
Correct Answer
14
14.
How many backward uneducated people are employed ?
A.
14
B.
5
C.
7
D.
11
Correct Answer
5
Explanation
The given question asks about the number of backward uneducated people who are employed. The correct answer is 5. This means that out of all the employed people, 5 of them are backward and uneducated.
15.
A multi-user Operating System
Correct Answer
A. Allows many users to use the system simultaneously
Explanation
A multi-user Operating System allows many users to use the system simultaneously. This means that multiple users can access the system and perform tasks at the same time, without interfering with each other's work. This is achieved by providing each user with a separate login and session, allowing them to run their own programs and perform their own tasks independently. This is in contrast to a single-user Operating System, where only one user can use the system at a time.
16.
Which of the following is NOT system software?
Correct Answer
C. Wordprocessor
Explanation
A word processor is not considered system software because it is an application software used for creating, editing, and formatting text documents. System software, on the other hand, refers to the core software that manages and controls the computer's hardware and provides a platform for other software to run. Examples of system software include the operating system, device drivers, defrag utility, and format utility, which directly interact with the hardware and perform essential system-level tasks.
17.
Which one of these is an operating system?
Correct Answer
C. Macintosh
Explanation
Macintosh is an operating system. It is the operating system developed by Apple Inc. for their Macintosh line of computers. It provides the necessary software and services to manage and control the computer hardware, allowing users to run applications and perform various tasks on their Macintosh computers. Sony, HP, Dell, and Toshiba are not operating systems but rather brands of computer hardware.
18.
What does ASCII stands for?
Correct Answer
C. American Standard Code for Information Interchange
Explanation
ASCII stands for American Standard Code for Information Interchange. It is a character encoding standard that was developed in the 1960s by a committee led by Robert W. Bemer. ASCII uses a 7-bit encoding scheme to represent text in computers and other electronic devices. It includes a set of 128 characters, including letters, numbers, punctuation marks, and control characters. ASCII has been widely used in the computer industry and is the basis for many other character encoding standards.