IMPORTANT QUESTIONS FOR THE INTERVIEW OF DSE

Q1- What is the use of CMOS battery ?

Ans- CMOS stands for Complementary Metal Oxide Semiconductor. It is a 3 volt battery which provide power supply to CMOS where BIOS settings are saved. When your CMOS battery is weak your computer will not be able to store BIOS setting after power supply is gone. It will be set on default .

Q2- What are the output voltages of  SMPS ?

Ans-  SMPS stands for Switch Mode Power Supply. It gives power supply to all internal parts of computer. It's output voltages are-

Black-            Ground (0 V) 

Red-                +5 v

Yellow-           +12 v

Orange-           +3.3 v

Green      -       +5 v (PS_ON)

Gray        -        +5 v ( Power Good )

Violet      -        +5 v (Stand by Voltage)

Blue-                 -12 V

White        -       -5 v

Q3- What is different between DDR2 and DDR3 RAM ?

Ans- DDR stands for Double Data Rate. Both are the type of DRAM  which work as a main memory of computer. There is some differences between them. DDR2 is older than DDR3 . It wroks on 1.8 volt and it's FSB (Front Side Bus) is 533 MHz to 800 MHz while as DDR3 works on 1.5 volt and it's FSB is 1066 MHz to 1866 MHz.. 

Q4- What is cache mermory ?

Ans- Cache memory is the type of SRAM (Static Random Access Memory ) which one memory cell is made up of 6 transistor that's why this memory is very costly. It always comes in less memory size. Cache memory may be hardware or software based. Example of hardware cache memory is processor's cache memory ,hard disk also has cache memory and software based cache example is DNS which stores resolved information. 

    Cache memory stores information about processed data. It has three levels known as L1, L2 and L3.