4th Class Computers Science Characteristics of Memory Devices Permanence of Storage

    Permanence of Storage

Some memories retain information for longer duration while others are used to store information for a very short period. There are memories which require constant refreshing to preserve the information; these memories are called dynamic memory, these memories are volatile in nature and lose contents on power failure. Another memory, which retains memory forever, is called static memory. This comes under the non-volatile category. As you have learned earlier, RAM is volatile memory and ROM is non-volatile memory    

 Fill in the blanks:

1. __ is and __ is a volatile memory.

2. The memory which retains memory forever is called ____ memory.

3. Some memories require constant refreshing to____________ the information.

(A) RAM, ROM, Dynamic, Preserve

(B) ROM, RAM, Static, Preserve

(C) PROM, SRAM, Static, Destroy

(D) CD, DVD, Dynamic, Destroy

(E) RAM, ROM, Static, Preserve  

Answer: (B)

Explanation

Correct Option:

(B) Options given in (B) are correct.

Incorrect Options:

(A) Options given in (A) are incorrect. Therefore, option (A) is incorrect.

(C) Options given in (C) are incorrect. Therefore, option (C) is incorrect

(D) Options given in (D) are incorrect. Therefore, option (D) is incorrect.

(E) Options given in (E) are incorrect. Therefore, option (E) is incorrect.    

 Read the given statements and select the correct one.

1. The memories which require constant refreshing to preserve the information are called Static memory.

2. Dynamic memories are volatile in nature and lose contents on power failure.

3. The memory which retains memory forever is called dynamic memory.

(A) 1 and 2                                                         

(B) 1 and 3

(C) Only 2                                                           

(D) All of these

(E) None of these  

Answer: (C)

Explanation

Correct Option:

(C) Only statement 2 is correct.

Incorrect Options:

(A) Statement 1 is incorrect and statement 2 is correct. Therefore, option (A) is incorrect.

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