N5 Computer Science

What is the base used by computers to store everything?

• Decimal

• Hexadecimal

• Binary

• Octal

Changing the number of bits used for the mantissa will change....

• The precision of the number

• The range of the number

• The sequence of the number

• The base of the number

Changing the number of bits used for the exponent will change....

• To store the base of the number

• To store the precision of the number

• To store the range of the number

• To store the sequence of the number

How many bits are used to represent characters in the extended ASCII code?

• 7 bits

• 8 bits

• 16 bits

• 32 bits

What does the Control Unit in a processor do?

• Performs all calculations and logical operations

• Controls the sequencing of fetching, decoding, and executing instructions

• Stores temporary memory locations within the processor

• Transfers the data between the processor and memory

What is the difference between an interpreter and a compiler?

• An interpreter translates the whole program at once, while a compiler translates one line at a time

• An interpreter translates code into machine code and executes immediately, while a compiler translates the whole program and saves the machine code version

• An interpreter is used for programs that are ready for release, while a compiler is used for testing

• An interpreter saves the translated code, while a compiler does not retain the translated code

Which of the following is NOT a way to reduce energy use in computer systems?

• Reducing brightness on monitors

• Activating efficiency mode

• Using energy-inefficient monitors

• Leaving computers on standby

What is the role of a firewall in computer security?

• To increase the speed of the computer

• To protect against suspicious access to a computer

• To encrypt data packets

• To store data packets

What is the purpose of encryption in electronic communications?

• To make the information faster to transmit

• To make the information accessible to everyone

• To code the information so it can only be understood by the sender and receiver

• To delete the information after it is sent

What is the purpose of the 'Design' phase in an iterative development process?

• To produce a software specification that outlines what the software must do

• To write the code for the program/software

• To plan the design of the program, and the user interface

• To test the program/software to ensure that all aspects work correctly