2 What does UTF-8 use to encode characters? A 1 byte for all characters B 2 bytes for all characters C 1 to 4 bytes per character D 4 bytes for all characters
4 In computers, images are stored as a grid of small dots called: A Pixels B Vectors C Samples D Frames
5 In two's complement representation, what is the 8-bit representation of -5? A 00000101 B 11111010 C 11111011 D 11111100
6 How are images stored in a computer? A As text characters B As a grid of pixels with color values C As audio samples D As floating-point numbers only
8 Which encoding scheme can represent characters from all languages? A ASCII B EBCDIC C Unicode D BCD
9 Which character encoding standard aims to support all languages of the world? A ASCII B Unicode C EBCDIC D BCD
10 Which of the following is NOT an advantage of Unicode over ASCII? A Supports more characters B Supports multiple languages C Uses only 7 bits per character D Includes symbols and emojis
11 What is the first step in converting a decimal number to binary? A Multiply the number by 2 B Divide the number by 2 and record the remainder C Add 2 to the number D Subtract 2 from the number
12 In floating-point representation, what does the term 'single precision' mean? A It uses 16 bits B It uses 32 bits C It uses 64 bits D It uses 128 bits
13 What is the primary purpose of two's complement in computer systems? A To represent positive integers B To simplify binary addition and subtraction C To encode text characters D To store real numbers
15 In video storage, the number of frames displayed per second is known as: A Frame rate B Resolution C Bit depth D Sample rate
17 How many bits does the UTF-8 encoding use for a character? A 8 bits only B 16 bits only C 8, 16, 24, or 32 bits D 32 bits only
19 Which statement about ASCII is correct? A ASCII can represent all Unicode characters B ASCII uses 8 bits for each character C ASCII is a 7-bit encoding scheme D ASCII is used only for images
20 Which text encoding scheme uses 7 bits to represent each character? A ASCII B Unicode C UTF-8 D UTF-16
21 In two's complement, how is a negative number represented? A By inverting all bits of the positive number B By adding 1 to the positive number C By inverting all bits and adding 1 D By setting the sign bit to 0
22 Which of the following is used to store images in computers? A Pixels B Samples C Frames D Characters
23 Which of the following is used to store images in a computer? A Sampling B Pixels C Frames D Bit rate
24 Which method is used to represent negative integers in binary? A Sign-magnitude B One's complement C Two's complement D ASCII encoding