Computer Systems and Data Management Quiz

What is the first step in the fetch stage of the instruction cycle?

• The instruction is copied to the MDR

• The address of the next instruction is copied from RAM into the register

• The PC is incremented

• The instruction is executed

What happens to the PC during the fetch stage?

• It is decremented

• It is reset

• It is incremented

• It is copied to the MDR

During the decode stage, where is the MDR copied to?

• The ALU

• The CIR

• The MAR

• The PC

What is decoded during the decode stage?

• The opcode

• The PC

• The ALU

• The MAR

What is a characteristic of a fixed length record?

• It avoids truncation

• It saves storage space

• It has different number of bytes in each record

• It has the same number of bytes in each record

Why are fixed length records quicker to process?

• Because they have variable fields

• Because start and end locations are known

• Because they save storage space

• Because they avoid truncation

What is a disadvantage of fixed length records?

• They have variable fields

• They are slower to process

• They avoid truncation

• They waste storage space

What is an advantage of variable length records?

• They have fixed fields

• They avoid truncation

• They are quicker to process

• They waste storage space

What is a potential cause of malicious damage?

• Computer server crash

• Customer deleting information

• Fire damage

• Hacker accessing and changing data

What is an example of accidental damage?

• Customer changing data about themselves

• Customer deleting information

• Disgruntled employee damaging data

• Hacker planting a virus