MCQ
Basic Computer: Memory Units MCQ - Practice Questions with Answers
Solve 15 Basic Computer: Memory Units questions for RAS/RPSC preparation.
Practice questions
Q1Which of the following statements correctly represents the usual binary-based conversion used for memory units?
In basic computer memory units, the commonly taught binary-based chain is 1 KB = 1024 bytes, 1 MB = 1024 KB and 1 GB = 1024 MB. The cue in the stem is the usual memory-unit conversion, so the immediate step from byte to kilobyte is required. Option A states that relationship exactly. Options C and D wrongly skip levels by comparing MB or GB directly with bytes.
Q2Which binary number represents the decimal number 13?
Binary numbers use powers of 2 from right to left: 1, 2, 4, 8 and so on. To represent decimal 13, select the values 8, 4 and 1, because 8 + 4 + 1 = 13. The 2's place is not needed. Therefore the bits from the 8's place to the 1's place are 1, 1, 0 and 1, giving 1101. The other options represent 11, 14 or 9, so they do not match the decimal number in the stem.
Q3Consider the following statements about data representation in a computer. Statement I: A computer stores and processes data internally in binary form. Statement II: ASCII is a character coding system that represents characters using numeric codes. Which of the above statements is/are correct?
Computers work internally with electrical states, which are represented logically as binary 0 and 1. Therefore, Statement I is correct. Characters such as letters, digits and symbols also need representation inside the computer. ASCII is a standard character coding system that assigns numeric codes to such characters. Therefore, Statement II is also correct. Since both statements are independently true, the correct option is both Statement I and Statement II.
Q4Read the Assertion (A) and Reason (R) given below. Assertion (A): A storage capacity of 4 GB can be written as 4096 MB. Reason (R): In basic computer memory measurement, 1 GB is equal to 1024 MB. Choose the correct answer.
The assertion says that 4 GB can be expressed as 4096 MB. In the memory-unit convention used in basic computer courses, 1 GB equals 1024 MB. Applying that conversion, 4 GB = 4 × 1024 MB = 4096 MB. Thus the assertion is true. The reason is also true and gives the exact rule used to derive the assertion. Therefore, both A and R are true, and R correctly explains A.
Q5Read the Assertion (A) and Reason (R) and choose the correct option. Assertion (A): Hexadecimal notation is often used as a compact way to write binary values in computing. Reason (R): One hexadecimal digit can represent exactly 4 binary bits.
Hexadecimal is a base-16 number system. Four binary bits can make 16 different patterns, from 0000 to 1111. A single hexadecimal digit also has 16 possible values, so each group of 4 bits can be written as one hexadecimal digit. This is why hexadecimal is useful for showing binary data in a shorter form, especially in memory addresses and machine-level values. Therefore the assertion is true, the reason is true, and the reason correctly explains the assertion.
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More questions
6Which decimal value is represented by the binary number 1010?
7Match List I with List II and choose the correct option. List I: I. Bit II. Nibble III. Kilobyte IV. Gigabyte List II: 1. 4 bits 2. Smallest data unit 3. 1024 bytes 4. 1024 megabytes
8Read the Assertion and Reason carefully. Assertion (A): A file of 5 MB is larger than a file of 500 KB. Reason (R): In the usual memory-unit conversion, 1 MB equals 1024 KB. Choose the correct option.
9Consider the following statements about memory-unit notation: Statement 1: A lowercase b commonly denotes bit, while an uppercase B denotes byte. Statement 2: 1 byte is larger than 1 bit. Statement 3: In basic memory measurement, 1 megabyte is smaller than 1 kilobyte. Which of the above statements are correct?
10Match List I with List II. List I: I. 1 KB II. 1 MB III. 1 GB List II: 1. 1024 MB 2. 1024 bytes 3. 1024 KB
11Consider the following statements about number representation in computers. Statement 1: Computers internally represent data using binary digits, 0 and 1. Statement 2: In binary number representation, each place value is a power of 2. Which of the above statements is/are correct?
12Match List I with List II and choose the correct option. List I: I. Bit II. Byte III. Kilobyte IV. Gigabyte List II: 1. 8 bits 2. Smallest data unit 3. 1024 bytes 4. 1024 megabytes
13In computer memory measurement, how many bits make one byte?
14In computer memory measurement, how many bits make one byte?
15In computer memory measurement, 1 byte is equal to how many bits?