4th Class Computers Science Characteristics of Memory Devices Storage Capacity

    Storage Capacity

Storage capacity refers to the size of the memory. Secondary memory like the hard disk has more storage capacity as compared to RAM. A large primary memory provides higher speed and a large secondary memory provides more space to store data and instructions. Bit is the smallest measuring unit of computer memory. It means binary digits (1 and) more like we use kilograms and grams to measure weight, the capacity of the internal processor memory of the computer is expressed in terms of number of bytes and kilobytes.  

        Capacity is the number of bytes (characters) a storage medium can hold. A table displaying the storage capacities of some memory devices is the following: (See figure 4.3.1)

 Given below is the information about storage Capacity of different memories. Read the statements and select the correct statement.

1. RAM has more storage capacity as compared to secondary memory.

2. Secondary memory provides more space to store data and instructions than a primary memory.

3. Bit means binary digits (0 and 1).

(A) 1 and 2                                                         

(B) Only 3

(C) 1 and 3                                                          

(D) All of these

(E) None of these  

Answer: (b)

Explanation

Correct Option:

(B) Only statement 3 is correct about the storage capacity of a memory.

Incorrect Options:          

(A)   Statements 1 and 2 are incorrect. Therefore, option (A) is incorrect.

(C) Statement 1 is incorrect and statement 3 is correct. Therefore, option (C) is incorrect.

(D) All the given statements are not correct. Therefore, option (D) is incorrect.

(E) All the given statements are not incorrect. Therefore, option (E) is incorrect.    

 Match the following:

      A                                                             B

1. Zip disk                                                  i.   4.7GB to 17GB

2. USB flash drive                                      ii.  Up to 8GB

3. Hard disk                                                iii. 120GB

4.   DVD-ROM                                            iv. 100 MB to 750 MB

(A) 1, iii, 2, iv, 3, ii, 4, i                                     

(B) 1, iv, 2, iii, 3, ii, 4, i

(C) 1, iv, 2, ii, 3, iii, 4, i                                     

(D) 1, i, 2, ii, 3, iii, 4, iv

(E) 1, ii, 2, iv, 3, i, 4, iii

Answer: (C)

Explanation

Correct Option:

(C) Option (C) is matched correctly.

Incorrect Options

(A) Option (A) is matched incorrectly.

(B) Option (B) is matched incorrectly.

(D) Option (D) is matched incorrectly.

(E) Option (E) is matched incorrectly.